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annotate packages/compat/posix/current/src/pthread.cxx @ 147:d397fc472bcf

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Merge from eCos master repository on 2001-01-05-06:43:02-GMT
author jlarmour
date Fri, 05 Jan 2001 17:12:36 +0000
parents a9ac27ec7abc
children 8f2f7615e727
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1 //==========================================================================
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2 //
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3 // pthread.cxx
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4 //
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5 // POSIX pthreads implementation
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg
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35 // Contributors: nickg, jlarmour
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36 // Date: 2000-03-27
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37 // Purpose: POSIX pthread implementation
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38 // Description: This file contains the implementation of the POSIX pthread
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39 // functions.
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40 //
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41 //
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42 //
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43 //####DESCRIPTIONEND####
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44 //
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45 //==========================================================================
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46
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47 #include <pkgconf/hal.h>
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48 #include <pkgconf/kernel.h>
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49 #include <pkgconf/posix.h>
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50 #include <pkgconf/isoinfra.h>
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51 #include <pkgconf/libc_startup.h>
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52
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53 #include <cyg/kernel/ktypes.h> // base kernel types
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54 #include <cyg/infra/cyg_trac.h> // tracing macros
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55 #include <cyg/infra/cyg_ass.h> // assertion macros
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56
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57 #include "pprivate.h" // POSIX private header
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58
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59 #include <stdlib.h> // malloc(), free()
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60
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61 #include <cyg/kernel/sched.hxx> // scheduler definitions
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62 #include <cyg/kernel/thread.hxx> // thread definitions
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63 #include <cyg/kernel/mutex.hxx> // mutex definitions
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64 #include <cyg/kernel/clock.hxx> // clock definitions
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65
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66 #include <cyg/kernel/sched.inl> // scheduler inlines
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67
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68 //-----------------------------------------------------------------------------
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69 // First check that the configuration contains the elements we need
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70
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71 #ifndef CYGPKG_KERNEL
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72 #error POSIX pthread need eCos kernel
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73 #endif
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74
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75 #ifndef CYGSEM_KERNEL_SCHED_MLQUEUE
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76 #error POSIX pthreads need MLQ scheduler
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77 #endif
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78
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79 #ifndef CYGSEM_KERNEL_SCHED_TIMESLICE
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80 #error POSIX pthreads need timeslicing
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81 #endif
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82
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83 #ifndef CYGVAR_KERNEL_THREADS_DATA
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84 #error POSIX pthreads need per-thread data
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85 #endif
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86
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87 //-----------------------------------------------------------------------------
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88 // Internal definitions
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89
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90 // Handle entry to a pthread package function.
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91 #define PTHREAD_ENTRY() CYG_REPORT_FUNCTYPE( "returning %d" )
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92
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93 // Handle entry to a pthread package function with no args.
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94 #define PTHREAD_ENTRY_VOID() CYG_REPORT_FUNCTION()
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95
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96 // Do a pthread package defined return. This requires the error code to be
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97 // returned as the result of the function. This also gives us a place to
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98 // put any generic tidyup handling needed for things like signal delivery
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99 // and cancellation.
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100 #define PTHREAD_RETURN(err) \
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101 CYG_MACRO_START \
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102 CYG_REPORT_RETVAL( err ); \
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103 return err; \
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104 CYG_MACRO_END
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105
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106 // A void variant of the above.
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107 #define PTHREAD_RETURN_VOID \
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108 CYG_MACRO_START \
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109 CYG_REPORT_RETURN(); \
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110 return; \
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111 CYG_MACRO_END
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112
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113 // Check that a pointer passed in as an argument is valid and return
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114 // EINVAL if it is not. This should be used to check pointers that are
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115 // required to be valid. Pointers that may optionally be NULL should
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116 // be checked within the function.
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117 #define PTHREAD_CHECK(ptr) if( (ptr) == NULL ) PTHREAD_RETURN(EINVAL);
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118
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119
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120 //=============================================================================
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121 // Internal data structures
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122
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123 // Mutex for controlling access to shared data structures
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124 Cyg_Mutex pthread_mutex CYGBLD_POSIX_INIT;
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125
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126 // Array of pthread control structures. A pthread_t object is
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127 // "just" an index into this array.
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128 static pthread_info *thread_table[CYGNUM_POSIX_PTHREAD_THREADS_MAX];
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129
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130 // Count of number of threads in table.
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131 static int pthread_count = 0;
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132
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133 // Count of number of threads that have exited and not been reaped.
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134 static int pthreads_exited;
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135
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136 // Count of number of threads that are waiting to be joined
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137 static int pthreads_tobejoined;
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138
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139 // Per-thread key allocation. This key map has a 1 bit set for each
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140 // key that is free, zero if it is allocated.
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141 #define KEY_MAP_TYPE cyg_uint32
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142 #define KEY_MAP_TYPE_SIZE (sizeof(KEY_MAP_TYPE)*8) // in BITS!
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143 static KEY_MAP_TYPE thread_key[PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE];
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144 static void (*key_destructor[PTHREAD_KEYS_MAX]) (void *);
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145
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146 // Index of next pthread_info to allocate from thread_table array.
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147 static int thread_info_next = 0;
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148
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149 // This is used to make pthread_t values unique even when reusing
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150 // a table slot. This allows CYGNUM_POSIX_PTHREAD_THREADS_MAX to range
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151 // up to 1024.
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152 #define THREAD_ID_COOKIE_INC 0x00000400
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153 #define THREAD_ID_COOKIE_MASK (THREAD_ID_COOKIE_INC-1)
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154 static pthread_t thread_id_cookie = THREAD_ID_COOKIE_INC;
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155
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156 //-----------------------------------------------------------------------------
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157 // Main thread.
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158
147
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159 static char main_stack[CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE];
115
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160
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161 // Thread ID of main thread.
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162 static pthread_t main_thread;
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163
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164 //=============================================================================
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165 // Exported variables
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166
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167 int pthread_canceled; // pointed to by PTHREAD_CANCELED
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168
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169 //=============================================================================
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170 // Internal functions
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171
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172 //-----------------------------------------------------------------------------
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173 // Private version of pthread_self() that returns a pointer to our internal
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174 // control structure.
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175
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176 pthread_info *pthread_self_info(void)
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177 {
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178 Cyg_Thread *thread = Cyg_Thread::self();
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179
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180 CYG_CHECK_DATA_PTR(thread, "Illegal current thread");
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181
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182 pthread_info *info = (pthread_info *)thread->get_data(CYGNUM_KERNEL_THREADS_DATA_POSIX);
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183
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184 // CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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185
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186 return info;
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187 }
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188
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189 externC pthread_info *pthread_info_id( pthread_t id )
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190 {
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191 pthread_t index = id & THREAD_ID_COOKIE_MASK;
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192
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193 pthread_info *info = thread_table[index];
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194
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195 // Check for a valid entry
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196 if( info == NULL )
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197 return NULL;
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198
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199 // Check that this is a valid entry
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200 if ( info->state == PTHREAD_STATE_FREE ||
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201 info->state == PTHREAD_STATE_EXITED )
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202 return NULL;
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203
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204 // Check that the entry matches the id
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205 if( info->id != id ) return NULL;
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206
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207 // Return the pointer
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208 return info;
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209 }
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210
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211 //-----------------------------------------------------------------------------
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212 // new operator to allow us to invoke the Cyg_Thread constructor on the
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213 // pthread_info.thread_obj array.
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214
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215 inline void *operator new(size_t size, cyg_uint8 *ptr) { return (void *)ptr; };
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216
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217 //-----------------------------------------------------------------------------
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218 // Optional memory allocation functions for pthread stacks.
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219 // If there is an implementation of malloc() available, define pthread_malloc()
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220 // and pthread_free() to use it. Otherwise define them to do nothing.
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221 // In the future we may want to add configuration here to permit thread stacks
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222 // to be allocated in a nominated memory pool separate from the standard malloc()
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223 // pool. Hence the (currently redundant) encapsulation of these functions.
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224
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225 #if CYGINT_ISO_MALLOC
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226
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227 static __inline__ CYG_ADDRWORD pthread_malloc( CYG_ADDRWORD size )
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228 {
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229 return (CYG_ADDRWORD)malloc( size );
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230 }
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231
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232 static __inline__ void pthread_free( CYG_ADDRWORD m )
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233 {
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234 free( (void *)m );
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235 }
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236
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237 #define PTHREAD_MALLOC
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238
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239 #else
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240
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241 #define pthread_malloc(_x_) (0)
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242
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243 #define pthread_free(_x_)
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244
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245 #endif
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246
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247 //-----------------------------------------------------------------------------
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248 // pthread entry function.
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249 // does some housekeeping and then calls the user's start routine.
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250
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251 static void pthread_entry(CYG_ADDRWORD data)
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252 {
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253 pthread_info *self = (pthread_info *)data;
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254
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255 void *retval = self->start_routine(self->start_arg);
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256
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257 pthread_exit( retval );
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258 }
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259
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260 //-----------------------------------------------------------------------------
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261 // Main entry function.
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262 // This is set as the start_routine of the main thread. It invokes main()
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263 // and if it returns, shuts down the system.
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264
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265 externC void cyg_libc_invoke_main( void );
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266
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267 static void *call_main( void * )
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268 {
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269 cyg_libc_invoke_main();
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270 return NULL; // placate compiler
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271 }
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272
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273 //-----------------------------------------------------------------------------
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274 // POSIX ASR
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275 // This is installed as the ASR for all POSIX threads.
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276
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277 static void posix_asr( CYG_ADDRWORD data )
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278 {
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279 pthread_info *self = (pthread_info *)data;
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280
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281 // Call into timer subsystem to deliver any pending
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282 // timer expirations.
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283 cyg_posix_timer_asr(self);
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284
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285 // Call signal subsystem to deliver any signals
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286 cyg_posix_signal_asr(self);
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287
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288 // Check for cancellation
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289 if( self->cancelpending &&
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290 self->cancelstate == PTHREAD_CANCEL_ENABLE &&
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291 self->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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292 {
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293 // If we have a pending cancellation, cancellations are
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294 // enabled and we are in asynchronous mode, then we can do the
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295 // cancellation processing. Since pthread_exit() does
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296 // everything we need to do, we just call that here.
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297
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298 pthread_exit(PTHREAD_CANCELED);
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299 }
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300 }
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301
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302 //-----------------------------------------------------------------------------
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303 // The (Grim) Reaper.
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304 // This function is called to tidy up and dispose of any threads that have
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305 // exited. This work must be done from a thread other than the one exiting.
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306 // Note: this function _must_ be called with pthread_mutex locked.
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307
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308 static void pthread_reap()
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309 {
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310 int i;
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311
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312 // Loop over the thread table looking for exited threads. The
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313 // pthreads_exited counter springs us out of this once we have
128
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314 // found them all (and keeps us out if there are none to do).
115
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315
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316 for( i = 0; pthreads_exited && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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317 {
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318 pthread_info *thread = thread_table[i];
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319
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320 if( thread != NULL && thread->state == PTHREAD_STATE_EXITED )
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321 {
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322 // The thread has exited, so it is a candidate for being
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323 // reaped. We have to make sure that the eCos thread has
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324 // also reached EXITED state before we can tidy it up.
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325
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326 while( thread->thread->get_state() != Cyg_Thread::EXITED )
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327 {
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328 // The eCos thread has not yet exited. This is
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329 // probably because its priority is too low to allow
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330 // it to complete. We fix this here by raising its
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331 // priority to equal ours and then yielding. This
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332 // should eventually get it into exited state.
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333
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334 Cyg_Thread *self = Cyg_Thread::self();
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335
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336 // Set thread's priority to our current dispatching priority.
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337 thread->thread->set_priority( self->get_current_priority() );
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338
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339 // Yield, yield
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340 self->yield();
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341
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342 // and keep looping until he exits.
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343 }
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344
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345 // At this point we have a thread that we can reap.
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346
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347 // destroy the eCos thread
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348 thread->thread->~Cyg_Thread();
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349
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350 // destroy the joiner condvar
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351 thread->joiner->~Cyg_Condition_Variable();
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352
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353 // Destroy signal handling fields
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354 cyg_posix_thread_sigdestroy( thread );
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355
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356 // Free the stack if we allocated it
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357 if( thread->freestack )
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358 pthread_free( thread->stackmem );
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359
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360 // Finally, set the thread table entry to NULL so that it
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361 // may be reused.
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362 thread_table[i] = NULL;
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363
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364 pthread_count--;
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365 pthreads_exited--;
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366 }
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367 }
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368 }
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369
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370 //=============================================================================
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371 // Functions exported to rest of POSIX subsystem.
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372
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373 //-----------------------------------------------------------------------------
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374 // Create the main() thread.
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375
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376 externC void cyg_posix_pthread_start( void )
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377 {
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378
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379 // Initialize the per-thread data key map.
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380
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381 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
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382 {
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383 thread_key[i] = ~0;
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384 }
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385
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386 // Create the main thread
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387 pthread_attr_t attr;
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388 struct sched_param schedparam;
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389
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390 schedparam.sched_priority = CYGNUM_POSIX_MAIN_DEFAULT_PRIORITY;
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391
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392 pthread_attr_init( &attr );
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393 pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
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394 pthread_attr_setstackaddr( &attr, &main_stack[CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE] );
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395 pthread_attr_setstacksize( &attr, CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE );
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396 pthread_attr_setschedpolicy( &attr, SCHED_RR );
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397 pthread_attr_setschedparam( &attr, &schedparam );
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398
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399 pthread_create( &main_thread, &attr, call_main, NULL );
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400 }
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401
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402 //-----------------------------------------------------------------------------
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403 // Look for a thread that can accept delivery of any of the signals in
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404 // the mask and release it from any wait it is in. Since this may be
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405 // called from a DSR, it cannot use any locks internally - any locking
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406 // should be done before the call.
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407
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408 externC void cyg_posix_pthread_release_thread( sigset_t *mask )
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409 {
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410 int i;
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411 int count = pthread_count;
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412
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413 // Loop over the thread table looking for a thread that has a
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414 // signal mask that does not mask all the signals in mask.
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415 // FIXME: find a more efficient way of doing this.
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416
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417 for( i = 0; count > 0 && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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418 {
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419 pthread_info *thread = thread_table[i];
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420
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421 if( (thread != NULL) &&
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422 (thread->state <= PTHREAD_STATE_RUNNING) &&
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423 ((*mask & ~thread->sigmask) != 0) )
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424 {
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425 // This thread can service at least one of the signals in
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426 // *mask. Knock it out of its wait and make its ASR pending.
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427
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428 thread->thread->set_asr_pending();
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429 thread->thread->release();
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430 break;
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431 }
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432
128
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433 // Decrement count for each valid thread we find.
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434 if( thread != NULL && thread->state != PTHREAD_STATE_FREE )
115
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435 count--;
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436 }
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437 }
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438
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439 //=============================================================================
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440 // General thread operations
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441
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442 //-----------------------------------------------------------------------------
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443 // Thread creation and management.
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444
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445 // Create a thread.
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446 externC int pthread_create ( pthread_t *thread,
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447 const pthread_attr_t *attr,
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448 void *(*start_routine) (void *),
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449 void *arg)
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450 {
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451 PTHREAD_ENTRY();
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452
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453 PTHREAD_CHECK(thread);
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454 PTHREAD_CHECK(start_routine);
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455
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456 pthread_info *self = pthread_self_info();
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457
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458 pthread_attr_t use_attr;
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459
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460 // Set use_attr to the set of attributes we are going to
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461 // actually use. Either those passed in, or the default set.
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462
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463 if( attr == NULL )
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464 pthread_attr_init( &use_attr );
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465 else use_attr = *attr;
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466
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467 // Adjust the attributes to cope with the setting of inheritsched.
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468
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469 if( use_attr.inheritsched == PTHREAD_INHERIT_SCHED )
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470 {
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471 use_attr.schedpolicy = self->attr.schedpolicy;
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472 use_attr.schedparam = self->attr.schedparam;
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473 }
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474
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475 CYG_ADDRWORD stackbase, stacksize;
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476 cyg_bool freestack = false;
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477 CYG_ADDRWORD stackmem = 0;
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478
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479 // If the stack size is not valid, we can assume that it is at
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480 // least PTHREAD_STACK_MIN bytes.
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481
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482 if( use_attr.stacksize_valid )
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483 stacksize = use_attr.stacksize;
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484 else stacksize = PTHREAD_STACK_MIN;
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485
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486 if( use_attr.stackaddr_valid )
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487 {
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488 // Set up stack base and size from supplied arguments.
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489
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490 // Calculate stack base from address and size.
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491 // FIXME: Falling stack assumed in pthread_create().
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492 stackmem = stackbase = (CYG_ADDRWORD)use_attr.stackaddr-stacksize;
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493 }
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494 else
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495 {
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496 #ifdef PTHREAD_MALLOC
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497
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498 stackmem = stackbase = pthread_malloc( stacksize );
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499
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500 if( stackmem == 0 )
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501 PTHREAD_RETURN( EAGAIN );
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502
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503 freestack = true;
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504 #else
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505 PTHREAD_RETURN(EINVAL);
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506 #endif
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507
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508 }
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509
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510 // Get sole access to data structures
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511
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512 pthread_mutex.lock();
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513
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514 // Dispose of any dead threads
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515 pthread_reap();
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516
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517 // Find a free slot in the thread table
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518
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519 pthread_info *nthread;
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520 int thread_next = thread_info_next;
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521
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522 while( thread_table[thread_next] != NULL )
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523 {
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524 thread_next++;
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525 if( thread_next >= CYGNUM_POSIX_PTHREAD_THREADS_MAX )
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526 thread_next = 0;
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527
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528 // check for wrap, and return error if no slots left
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529 if( thread_next == thread_info_next )
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530 {
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531 pthread_mutex.unlock();
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532 if( freestack )
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533 pthread_free( stackmem );
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534 PTHREAD_RETURN(ENOMEM);
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535 }
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536 }
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537
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538 nthread = (pthread_info *)stackbase;
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539
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540 stackbase += sizeof(pthread_info);
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541 stacksize -= sizeof(pthread_info);
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542
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543 thread_table[thread_next] = nthread;
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544
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545 // Set new next index
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546 thread_info_next = thread_next;
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diff changeset
547
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548 // step the cookie
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549 thread_id_cookie += THREAD_ID_COOKIE_INC;
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550
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551 // Initialize the table entry
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552 nthread->state = use_attr.detachstate == PTHREAD_CREATE_JOINABLE ?
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553 PTHREAD_STATE_RUNNING : PTHREAD_STATE_DETACHED;
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554 nthread->id = thread_next+thread_id_cookie;
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555 nthread->attr = use_attr;
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556 nthread->retval = 0;
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557 nthread->start_routine = start_routine;
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558 nthread->start_arg = arg;
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diff changeset
559
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560 nthread->freestack = freestack;
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561 nthread->stackmem = stackmem;
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562
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563 nthread->cancelstate = PTHREAD_CANCEL_ENABLE;
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564 nthread->canceltype = PTHREAD_CANCEL_DEFERRED;
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565 nthread->cancelbuffer = NULL;
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566 nthread->cancelpending = false;
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567
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568 nthread->thread_data = NULL;
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569
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570 #ifdef CYGVAR_KERNEL_THREADS_NAME
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diff changeset
571 // generate a name for this thread
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diff changeset
572
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573 char *name = nthread->name;
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574 static char *name_template = "pthread.00000000";
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575 pthread_t id = nthread->id;
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576
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577 for( int i = 0; name_template[i]; i++ ) name[i] = name_template[i];
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578
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579 // dump the id, in hex into the name.
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580 for( int i = 15; i >= 8; i-- )
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581 {
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582 name[i] = "0123456789ABCDEF"[id&0xF];
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583 id >>= 4;
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584 }
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585
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586 #endif
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587
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588 // Initialize the joiner condition variable
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589
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590 nthread->joiner = new(nthread->joiner_obj) Cyg_Condition_Variable( pthread_mutex );
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591
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592 // Initialize signal specific fields.
136
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593 cyg_posix_thread_siginit( nthread, self );
115
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594
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595 // create the underlying eCos thread
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596
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597 nthread->thread = new(&nthread->thread_obj[0])
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598 Cyg_Thread ( PTHREAD_ECOS_PRIORITY(use_attr.schedparam.sched_priority),
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599 pthread_entry,
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600 (CYG_ADDRWORD)nthread,
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601 name,
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602 stackbase,
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603 stacksize);
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604
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605 // Put pointer to pthread_info into eCos thread's per-thread data.
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606 nthread->thread->set_data( CYGNUM_KERNEL_THREADS_DATA_POSIX, (CYG_ADDRWORD)nthread );
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607
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608 // Set timeslice enable according to scheduling policy.
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609 if( use_attr.schedpolicy == SCHED_FIFO )
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610 nthread->thread->timeslice_disable();
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611 else nthread->thread->timeslice_enable();
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612
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613 // set up ASR and data
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614 nthread->thread->set_asr( posix_asr, (CYG_ADDRWORD)nthread, NULL, NULL );
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615
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616 // return thread ID
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617 *thread = nthread->id;
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618
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619 pthread_count++;
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620
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621 pthread_mutex.unlock();
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622
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623 // finally, set the thread going
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624 nthread->thread->resume();
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625
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626 PTHREAD_RETURN(0);
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627 }
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628
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629 //-----------------------------------------------------------------------------
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630 // Get current thread id.
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631
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632 externC pthread_t pthread_self ( void )
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633 {
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634 PTHREAD_ENTRY();
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635
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636 pthread_info *info = pthread_self_info();
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637
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638 CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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639
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640 return info->id;
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641 }
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642
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643 //-----------------------------------------------------------------------------
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644 // Compare two thread identifiers.
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645
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646 externC int pthread_equal (pthread_t thread1, pthread_t thread2)
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647 {
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648 PTHREAD_ENTRY();
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649
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650 return thread1 == thread2;
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651 }
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652
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653 //-----------------------------------------------------------------------------
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654 // Terminate current thread.
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655
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656 externC void exit(int) CYGBLD_ATTRIB_NORET;
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657
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658 externC void pthread_exit (void *retval)
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659 {
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660 PTHREAD_ENTRY();
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661
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662 pthread_info *self = pthread_self_info();
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663
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664 // Call cancellation handlers. We eat up the buffers as we go in
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665 // case any of the routines calls pthread_exit() itself.
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666 while( self->cancelbuffer != NULL )
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667 {
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668 struct pthread_cleanup_buffer *buffer = self->cancelbuffer;
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669
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670 self->cancelbuffer = buffer->prev;
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671
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672 buffer->routine(buffer->arg);
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673 }
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674
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675 if( self->thread_data != NULL )
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676 {
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677 // Call per-thread key destructors.
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678 // The specification of this is that we must continue to call the
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679 // destructor functions until all the per-thread data values are NULL or
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680 // we have done it PTHREAD_DESTRUCTOR_ITERATIONS times.
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681
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682 cyg_bool destructors_called;
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683 int destructor_iterations = 0;
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684
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685 do
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686 {
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687 destructors_called = false;
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688
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689 for( cyg_ucount32 key = 0; key < PTHREAD_KEYS_MAX; key++ )
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690 {
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691 // Skip unallocated keys
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692 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
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693 continue;
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694
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695 // Skip NULL destructors
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696 if( key_destructor[key] == NULL ) continue;
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697
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698 // Skip NULL data values
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699 if( self->thread_data[key] == NULL ) continue;
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700
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701 // If it passes all that, call the destructor
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702 key_destructor[key]((void *)(self->thread_data[key]));
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703
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704 // Record that we called a destructor
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705 destructors_called = true;
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706 }
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707
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708 // Count the iteration
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709 destructor_iterations++;
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710
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711 } while( destructors_called &&
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712 (destructor_iterations <= PTHREAD_DESTRUCTOR_ITERATIONS));
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713
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714 }
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715
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diff changeset
716 pthread_mutex.lock();
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717
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718 // Set the retval for any joiner
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719 self->retval = retval;
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720
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721 // If we are already detached, go to EXITED state, otherwise
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722 // go into JOIN state.
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diff changeset
723
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
724 if ( PTHREAD_STATE_DETACHED == self->state ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
725 self->state = PTHREAD_STATE_EXITED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
726 pthreads_exited++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
727 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
728 self->state = PTHREAD_STATE_JOIN;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
729 pthreads_tobejoined++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
730 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
731
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
732 // Kick any waiting joiners
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
733 self->joiner->broadcast();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
734
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
735 cyg_bool call_exit=false;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
736
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
737 // if this is the last thread (other than threads waiting to be joined)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
738 // then we need to call exit() later
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
739 if ( pthreads_exited + pthreads_tobejoined == pthread_count )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
740 call_exit=true;
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jlarmour
parents:
diff changeset
741
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
742 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
743
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
744 // Finally, call the exit function; this will not return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
745 if ( call_exit )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
746 ::exit(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
747 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
748 self->thread->exit();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
749
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
750 // This loop keeps some compilers happy. pthread_exit() is marked
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
751 // with the noreturn attribute, and without this they generate a
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
752 // call to abort() here in case Cyg_Thread::exit() returns.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
753
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
754 for(;;) continue;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
755 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
756
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
757 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
758 // Wait for the thread to terminate. If thread_return is not NULL then
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
759 // the retval from the thread's call to pthread_exit() is stored at
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
760 // *thread_return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
761
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
762 externC int pthread_join (pthread_t thread, void **thread_return)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
763 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
764 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
765
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
766 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
767
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
768 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
769 pthread_reap();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
770
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
771 pthread_info *self = pthread_self_info();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
772 pthread_info *joinee = pthread_info_id( thread );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
773
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
774 if( joinee == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
775 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
776 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
777 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
778 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
779
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
780 if( joinee == self )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
781 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
782 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
783 PTHREAD_RETURN(EDEADLK);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
784 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
785
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
786 switch ( joinee->state )
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jlarmour
parents:
diff changeset
787 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
788 case PTHREAD_STATE_RUNNING:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
789 // The thread is still running, we must wait for it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
790 while( joinee->state == PTHREAD_STATE_RUNNING )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
791 joinee->joiner->wait();
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jlarmour
parents:
diff changeset
792
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
793 // check that the thread is still joinable
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
794 if( joinee->state == PTHREAD_STATE_JOIN )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
795 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
796
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
797 // The thread has become unjoinable while we waited, so we
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
798 // fall through to complain.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
799
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
800 case PTHREAD_STATE_FREE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
801 case PTHREAD_STATE_DETACHED:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
802 case PTHREAD_STATE_EXITED:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
803 // None of these may be joined.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
804 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
805 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
806
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
807 case PTHREAD_STATE_JOIN:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
808 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
809 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
810
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
811 // here, we know that joinee is a thread that has exited and is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
812 // ready to be joined.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
813
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
814 // Get the retval
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
815
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
816 if( thread_return != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
817 *thread_return = joinee->retval;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
818
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
819 // set state to exited.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
820 joinee->state = PTHREAD_STATE_EXITED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
821 pthreads_exited++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
822 pthreads_tobejoined--;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
823
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
824 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
825 pthread_reap();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
826
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
827 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
828
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
829 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
830 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
831
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
832 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
833 // Set the detachstate of the thread to "detached". The thread then does not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
834 // need to be joined and its resources will be freed when it exits.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
835
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
836 externC int pthread_detach (pthread_t thread)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
837 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
838 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
839
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
840 int ret = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
841
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
842 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
843
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
844 pthread_info *detachee = pthread_info_id( thread );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
845
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
846 if( detachee == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
847 ret = ESRCH; // No such thread
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
848 else if( detachee->state == PTHREAD_STATE_DETACHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
849 ret = EINVAL; // Already detached!
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
850 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
851 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
852 // Set state to detached and kick any joinees to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
853 // make them return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
854 detachee->state = PTHREAD_STATE_DETACHED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
855 detachee->joiner->broadcast();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
856 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
857
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
858 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
859 pthread_reap();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
860
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
861 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
862
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
863 PTHREAD_RETURN(ret);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
864 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
865
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
866
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
867 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
868 // Thread attribute handling.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
869
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
870 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
871 // Initialize attributes object with default attributes:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
872 // detachstate == PTHREAD_CREATE_JOINABLE
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jlarmour
parents:
diff changeset
873 // scope == PTHREAD_SCOPE_SYSTEM
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jlarmour
parents:
diff changeset
874 // inheritsched == PTHREAD_INHERIT_SCHED
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jlarmour
parents:
diff changeset
875 // schedpolicy == SCHED_OTHER
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jlarmour
parents:
diff changeset
876 // schedparam == unset
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jlarmour
parents:
diff changeset
877 // stackaddr == unset
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jlarmour
parents:
diff changeset
878 // stacksize == 0
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jlarmour
parents:
diff changeset
879 //
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jlarmour
parents:
diff changeset
880
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
881 externC int pthread_attr_init (pthread_attr_t *attr)
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parents:
diff changeset
882 {
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jlarmour
parents:
diff changeset
883 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
884
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jlarmour
parents:
diff changeset
885 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
886
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jlarmour
parents:
diff changeset
887 attr->detachstate = PTHREAD_CREATE_JOINABLE;
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jlarmour
parents:
diff changeset
888 attr->scope = PTHREAD_SCOPE_SYSTEM;
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jlarmour
parents:
diff changeset
889 attr->inheritsched = PTHREAD_INHERIT_SCHED;
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jlarmour
parents:
diff changeset
890 attr->schedpolicy = SCHED_OTHER;
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jlarmour
parents:
diff changeset
891 attr->schedparam.sched_priority = 0;
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jlarmour
parents:
diff changeset
892 attr->stackaddr_valid = 0;
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jlarmour
parents:
diff changeset
893 attr->stackaddr = NULL;
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jlarmour
parents:
diff changeset
894 attr->stacksize_valid = 0;
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jlarmour
parents:
diff changeset
895 attr->stacksize = 0;
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jlarmour
parents:
diff changeset
896
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jlarmour
parents:
diff changeset
897 PTHREAD_RETURN(0);
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parents:
diff changeset
898 }
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diff changeset
899
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jlarmour
parents:
diff changeset
900 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
901 // Destroy thread attributes object
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jlarmour
parents:
diff changeset
902
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jlarmour
parents:
diff changeset
903 externC int pthread_attr_destroy (pthread_attr_t *attr)
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jlarmour
parents:
diff changeset
904 {
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jlarmour
parents:
diff changeset
905 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
906
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jlarmour
parents:
diff changeset
907 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
908
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jlarmour
parents:
diff changeset
909 // Nothing to do here...
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jlarmour
parents:
diff changeset
910
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jlarmour
parents:
diff changeset
911 PTHREAD_RETURN(0);
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parents:
diff changeset
912 }
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parents:
diff changeset
913
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parents:
diff changeset
914 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
915 // Set the detachstate attribute
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parents:
diff changeset
916
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parents:
diff changeset
917 externC int pthread_attr_setdetachstate (pthread_attr_t *attr,
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parents:
diff changeset
918 int detachstate)
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parents:
diff changeset
919 {
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parents:
diff changeset
920 PTHREAD_ENTRY();
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parents:
diff changeset
921
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parents:
diff changeset
922 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
923
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parents:
diff changeset
924 if( detachstate == PTHREAD_CREATE_JOINABLE ||
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jlarmour
parents:
diff changeset
925 detachstate == PTHREAD_CREATE_DETACHED )
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jlarmour
parents:
diff changeset
926 {
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parents:
diff changeset
927 attr->detachstate = detachstate;
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parents:
diff changeset
928 PTHREAD_RETURN(0);
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parents:
diff changeset
929 }
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parents:
diff changeset
930
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parents:
diff changeset
931 PTHREAD_RETURN(EINVAL);
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parents:
diff changeset
932 }
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parents:
diff changeset
933
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parents:
diff changeset
934 //-----------------------------------------------------------------------------
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parents:
diff changeset
935 // Get the detachstate attribute
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parents:
diff changeset
936 externC int pthread_attr_getdetachstate (const pthread_attr_t *attr,
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parents:
diff changeset
937 int *detachstate)
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jlarmour
parents:
diff changeset
938 {
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jlarmour
parents:
diff changeset
939 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
940
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jlarmour
parents:
diff changeset
941 PTHREAD_CHECK(attr);
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parents:
diff changeset
942
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jlarmour
parents:
diff changeset
943 if( detachstate != NULL )
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parents:
diff changeset
944 *detachstate = attr->detachstate;
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parents:
diff changeset
945
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parents:
diff changeset
946 PTHREAD_RETURN(0);
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parents:
diff changeset
947 }
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diff changeset
948
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parents:
diff changeset
949 //-----------------------------------------------------------------------------
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parents:
diff changeset
950 // Set scheduling contention scope
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parents:
diff changeset
951
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jlarmour
parents:
diff changeset
952 externC int pthread_attr_setscope (pthread_attr_t *attr, int scope)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
953 {
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parents:
diff changeset
954 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
955
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jlarmour
parents:
diff changeset
956 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
957
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parents:
diff changeset
958 if( scope == PTHREAD_SCOPE_SYSTEM ||
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parents:
diff changeset
959 scope == PTHREAD_SCOPE_PROCESS )
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jlarmour
parents:
diff changeset
960 {
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jlarmour
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diff changeset
961 if( scope == PTHREAD_SCOPE_PROCESS )
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jlarmour
parents:
diff changeset
962 PTHREAD_RETURN(ENOTSUP);
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diff changeset
963
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diff changeset
964 attr->scope = scope;
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parents:
diff changeset
965
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jlarmour
parents:
diff changeset
966 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
967 }
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diff changeset
968
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jlarmour
parents:
diff changeset
969 PTHREAD_RETURN(EINVAL);
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parents:
diff changeset
970 }
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diff changeset
971
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parents:
diff changeset
972 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
973 // Get scheduling contention scope
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parents:
diff changeset
974
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diff changeset
975 externC int pthread_attr_getscope (const pthread_attr_t *attr, int *scope)
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jlarmour
parents:
diff changeset
976 {
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jlarmour
parents:
diff changeset
977 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
978
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
979 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
980
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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diff changeset
981 if( scope != NULL )
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jlarmour
parents:
diff changeset
982 *scope = attr->scope;
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jlarmour
parents:
diff changeset
983
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
984 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
985 }
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jlarmour
parents:
diff changeset
986
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jlarmour
parents:
diff changeset
987 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
988 // Set scheduling inheritance attribute
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jlarmour
parents:
diff changeset
989
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jlarmour
parents:
diff changeset
990 externC int pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit)
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jlarmour
parents:
diff changeset
991 {
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jlarmour
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diff changeset
992 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
993
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
994 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
995
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jlarmour
parents:
diff changeset
996 if( inherit == PTHREAD_INHERIT_SCHED ||
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jlarmour
parents:
diff changeset
997 inherit == PTHREAD_EXPLICIT_SCHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
998 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
999 attr->inheritsched = inherit;
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jlarmour
parents:
diff changeset
1000
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1001 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1002 }
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jlarmour
parents:
diff changeset
1003
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1004 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1005 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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diff changeset
1006
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1007 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1008 // Get scheduling inheritance attribute
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jlarmour
parents:
diff changeset
1009
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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diff changeset
1010 externC int pthread_attr_getinheritsched (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1011 int *inherit)
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jlarmour
parents:
diff changeset
1012 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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diff changeset
1013 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1014
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1015 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1016
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1017 if( inherit != NULL )
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jlarmour
parents:
diff changeset
1018 *inherit = attr->inheritsched;
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jlarmour
parents:
diff changeset
1019
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jlarmour
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diff changeset
1020 PTHREAD_RETURN(0);
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diff changeset
1021 }
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jlarmour
parents:
diff changeset
1022
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jlarmour
parents:
diff changeset
1023 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1024 // Set scheduling policy
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parents:
diff changeset
1025
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parents:
diff changeset
1026 externC int pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy)
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parents:
diff changeset
1027 {
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jlarmour
parents:
diff changeset
1028 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1029
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parents:
diff changeset
1030 PTHREAD_CHECK(attr);
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parents:
diff changeset
1031
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parents:
diff changeset
1032 if( policy == SCHED_OTHER ||
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jlarmour
parents:
diff changeset
1033 policy == SCHED_FIFO ||
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jlarmour
parents:
diff changeset
1034 policy == SCHED_RR )
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jlarmour
parents:
diff changeset
1035 {
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parents:
diff changeset
1036 attr->schedpolicy = policy;
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parents:
diff changeset
1037
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parents:
diff changeset
1038 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1039 }
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parents:
diff changeset
1040
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parents:
diff changeset
1041 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1042 }
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parents:
diff changeset
1043
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parents:
diff changeset
1044 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1045 // Get scheduling policy
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parents:
diff changeset
1046
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diff changeset
1047 externC int pthread_attr_getschedpolicy (const pthread_attr_t *attr,
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diff changeset
1048 int *policy)
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jlarmour
parents:
diff changeset
1049 {
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diff changeset
1050 PTHREAD_ENTRY();
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parents:
diff changeset
1051
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parents:
diff changeset
1052 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1053
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diff changeset
1054 if( policy != NULL )
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diff changeset
1055 *policy = attr->schedpolicy;
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diff changeset
1056
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diff changeset
1057 PTHREAD_RETURN(0);
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parents:
diff changeset
1058 }
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diff changeset
1059
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diff changeset
1060 //-----------------------------------------------------------------------------
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parents:
diff changeset
1061 // Set scheduling parameters
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diff changeset
1062 externC int pthread_attr_setschedparam (pthread_attr_t *attr,
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diff changeset
1063 const struct sched_param *param)
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diff changeset
1064 {
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diff changeset
1065 PTHREAD_ENTRY();
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parents:
diff changeset
1066
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diff changeset
1067 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1068 PTHREAD_CHECK(param);
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jlarmour
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diff changeset
1069
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diff changeset
1070 attr->schedparam = *param;
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parents:
diff changeset
1071
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diff changeset
1072 PTHREAD_RETURN(0);
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parents:
diff changeset
1073 }
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diff changeset
1074
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diff changeset
1075 //-----------------------------------------------------------------------------
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parents:
diff changeset
1076 // Get scheduling parameters
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diff changeset
1077
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parents:
diff changeset
1078 externC int pthread_attr_getschedparam (const pthread_attr_t *attr,
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parents:
diff changeset
1079 struct sched_param *param)
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parents:
diff changeset
1080 {
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jlarmour
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diff changeset
1081 PTHREAD_ENTRY();
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parents:
diff changeset
1082
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parents:
diff changeset
1083 PTHREAD_CHECK(attr);
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diff changeset
1084
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diff changeset
1085 if( param != NULL )
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parents:
diff changeset
1086 *param = attr->schedparam;
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parents:
diff changeset
1087
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parents:
diff changeset
1088 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1089 }
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diff changeset
1090
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parents:
diff changeset
1091 //-----------------------------------------------------------------------------
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jlarmour
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diff changeset
1092 // Set starting address of stack. Whether this is at the start or end of
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
1093 // the memory block allocated for the stack depends on whether the stack
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1094 // grows up or down.
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parents:
diff changeset
1095
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diff changeset
1096 externC int pthread_attr_setstackaddr (pthread_attr_t *attr, void *stackaddr)
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parents:
diff changeset
1097 {
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jlarmour
parents:
diff changeset
1098 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1099
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jlarmour
parents:
diff changeset
1100 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1101
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parents:
diff changeset
1102 attr->stackaddr = stackaddr;
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jlarmour
parents:
diff changeset
1103 attr->stackaddr_valid = 1;
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jlarmour
parents:
diff changeset
1104
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parents:
diff changeset
1105 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1106 }
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jlarmour
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diff changeset
1107
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jlarmour
parents:
diff changeset
1108 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1109 // Get any previously set stack address.
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jlarmour
parents:
diff changeset
1110
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parents:
diff changeset
1111 externC int pthread_attr_getstackaddr (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1112 void **stackaddr)
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jlarmour
parents:
diff changeset
1113 {
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jlarmour
parents:
diff changeset
1114 PTHREAD_ENTRY();
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parents:
diff changeset
1115
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jlarmour
parents:
diff changeset
1116 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1117
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parents:
diff changeset
1118 if( stackaddr != NULL )
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jlarmour
parents:
diff changeset
1119 {
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jlarmour
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diff changeset
1120 if( attr->stackaddr_valid )
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jlarmour
parents:
diff changeset
1121 {
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diff changeset
1122 *stackaddr = attr->stackaddr;
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parents:
diff changeset
1123 PTHREAD_RETURN(0);
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parents:
diff changeset
1124 }
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parents:
diff changeset
1125 // Stack address not set, return EINVAL.
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parents:
diff changeset
1126 else PTHREAD_RETURN(EINVAL);
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parents:
diff changeset
1127 }
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diff changeset
1128
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
1129 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1130 }
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jlarmour
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diff changeset
1131
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diff changeset
1132
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parents:
diff changeset
1133 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1134 // Set minimum creation stack size.
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jlarmour
parents:
diff changeset
1135
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diff changeset
1136 externC int pthread_attr_setstacksize (pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1137 size_t stacksize)
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jlarmour
parents:
diff changeset
1138 {
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jlarmour
parents:
diff changeset
1139 PTHREAD_ENTRY();
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parents:
diff changeset
1140
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diff changeset
1141 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1142
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diff changeset
1143 CYG_ASSERT( stacksize > PTHREAD_STACK_MIN, "Inadequate stack size supplied");
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jlarmour
parents:
diff changeset
1144
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jlarmour
parents:
diff changeset
1145 // Reject inadequate stack sizes
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jlarmour
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diff changeset
1146 if( stacksize < PTHREAD_STACK_MIN )
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jlarmour
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diff changeset
1147 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1148
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diff changeset
1149 attr->stacksize_valid = 1;
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jlarmour
parents:
diff changeset
1150 attr->stacksize = stacksize;
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diff changeset
1151
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jlarmour
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diff changeset
1152 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1153 }
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diff changeset
1154
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parents:
diff changeset
1155 //-----------------------------------------------------------------------------
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jlarmour
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diff changeset
1156 // Get current minimal stack size.
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jlarmour
parents:
diff changeset
1157
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diff changeset
1158 externC int pthread_attr_getstacksize (const pthread_attr_t *attr,
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parents:
diff changeset
1159 size_t *stacksize)
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jlarmour
parents:
diff changeset
1160 {
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jlarmour
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diff changeset
1161 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1162
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jlarmour
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diff changeset
1163 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1164
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jlarmour
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diff changeset
1165 // Reject attempts to get a stack size when one has not been set.
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diff changeset
1166 if( !attr->stacksize_valid )
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jlarmour
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diff changeset
1167 PTHREAD_RETURN(EINVAL);
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jlarmour
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diff changeset
1168
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parents:
diff changeset
1169 if( stacksize != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1170 *stacksize = attr->stacksize;
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jlarmour
parents:
diff changeset
1171
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1172 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1173 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1174
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1175 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1176 // Thread scheduling controls
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jlarmour
parents:
diff changeset
1177
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1178 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1179 // Set scheduling policy and parameters for the thread
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jlarmour
parents:
diff changeset
1180
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1181 externC int pthread_setschedparam (pthread_t thread_id,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1182 int policy,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1183 const struct sched_param *param)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1184 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1185 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1186
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1187 if( policy != SCHED_OTHER &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1188 policy != SCHED_FIFO &&
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jlarmour
parents:
diff changeset
1189 policy != SCHED_RR )
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jlarmour
parents:
diff changeset
1190 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1191
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jlarmour
parents:
diff changeset
1192 PTHREAD_CHECK(param);
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jlarmour
parents:
diff changeset
1193
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jlarmour
parents:
diff changeset
1194 // The parameters seem OK, change the thread...
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jlarmour
parents:
diff changeset
1195
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jlarmour
parents:
diff changeset
1196 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1197
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jlarmour
parents:
diff changeset
1198 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1199
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jlarmour
parents:
diff changeset
1200 if( thread == NULL )
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jlarmour
parents:
diff changeset
1201 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1202 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1203 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1204 }
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jlarmour
parents:
diff changeset
1205
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jlarmour
parents:
diff changeset
1206 thread->attr.schedpolicy = policy;
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jlarmour
parents:
diff changeset
1207 thread->attr.schedparam = *param;
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jlarmour
parents:
diff changeset
1208
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jlarmour
parents:
diff changeset
1209 if ( policy == SCHED_FIFO )
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jlarmour
parents:
diff changeset
1210 thread->thread->timeslice_disable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1211 else thread->thread->timeslice_enable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1212
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jlarmour
parents:
diff changeset
1213 thread->thread->set_priority( PTHREAD_ECOS_PRIORITY( param->sched_priority ));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1214
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1215 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1216
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1217 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1218 }
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jlarmour
parents:
diff changeset
1219
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1220 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1221 // Get scheduling policy and parameters for the thread
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1222
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1223 externC int pthread_getschedparam (pthread_t thread_id,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1224 int *policy,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1225 struct sched_param *param)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1226 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1227 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1228
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1229 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1230
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1231 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1232
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jlarmour
parents:
diff changeset
1233 if( thread == NULL )
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jlarmour
parents:
diff changeset
1234 {
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jlarmour
parents:
diff changeset
1235 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1236 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1237 }
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jlarmour
parents:
diff changeset
1238
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1239 if( policy != NULL )
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jlarmour
parents:
diff changeset
1240 *policy = thread->attr.schedpolicy;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1241
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1242 if( param != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1243 *param = thread->attr.schedparam;
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jlarmour
parents:
diff changeset
1244
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jlarmour
parents:
diff changeset
1245 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1246
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1247 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1248 }
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jlarmour
parents:
diff changeset
1249
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1250
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1251 //=============================================================================
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jlarmour
parents:
diff changeset
1252 // Mutexes
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jlarmour
parents:
diff changeset
1253
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1254 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1255 // Mutex attributes manipulation functions
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jlarmour
parents:
diff changeset
1256
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1257 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1258 // Initialize attribute object
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jlarmour
parents:
diff changeset
1259
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1260 externC int pthread_mutexattr_init ( pthread_mutexattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1261 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1262 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1263
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1264 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1265
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1266 attr->protocol = PTHREAD_PRIO_NONE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1267 attr->prioceiling = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1268
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1269 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1270 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1271
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1272 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1273 // Destroy attribute object
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1274
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1275 externC int pthread_mutexattr_destroy ( pthread_mutexattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1276 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1277 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1278
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1279 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1280
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1281 // Nothing to do here...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1282
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1283 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1284 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1285
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1286 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1287 // Optional functions depending on priority inversion protection options.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1288
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1289 #if defined(_POSIX_THREAD_PRIO_INHERIT) || defined(_POSIX_THREAD_PRIO_PROTECT)
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jlarmour
parents:
diff changeset
1290
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1291 // Set priority inversion protection protocol
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1292 externC int pthread_mutexattr_setprotocol ( pthread_mutexattr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1293 int protocol)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1294 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1295 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1296
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1297 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1298
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1299 switch( protocol )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1300 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1301 case PTHREAD_PRIO_NONE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1302 #if defined(_POSIX_THREAD_PRIO_INHERIT)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1303 case PTHREAD_PRIO_INHERIT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1304 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1305 #if defined(_POSIX_THREAD_PRIO_PROTECT)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1306 case PTHREAD_PRIO_PROTECT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1307 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1308 attr->protocol = protocol;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1309 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1310
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1311 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1312 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1313 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1314
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1315 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1316 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1317
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1318 // Get priority inversion protection protocol
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1319 externC int pthread_mutexattr_getprotocol ( pthread_mutexattr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1320 int *protocol)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1321 {
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jlarmour
parents:
diff changeset
1322 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1323
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jlarmour
parents:
diff changeset
1324 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1325
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1326 if( protocol != NULL )
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jlarmour
parents:
diff changeset
1327 *protocol = attr->protocol;
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jlarmour
parents:
diff changeset
1328
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1329 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1330 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1331
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1332 #if defined(_POSIX_THREAD_PRIO_PROTECT)
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jlarmour
parents:
diff changeset
1333
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1334 // Set priority for priority ceiling protocol
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jlarmour
parents:
diff changeset
1335 externC int pthread_mutexattr_setprioceiling ( pthread_mutexattr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1336 int prioceiling)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1337 {
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jlarmour
parents:
diff changeset
1338 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1339
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1340 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1341
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jlarmour
parents:
diff changeset
1342
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jlarmour
parents:
diff changeset
1343 attr->prioceiling = prioceiling;
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jlarmour
parents:
diff changeset
1344
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jlarmour
parents:
diff changeset
1345 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1346 }
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jlarmour
parents:
diff changeset
1347
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1348 // Get priority for priority ceiling protocol
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jlarmour
parents:
diff changeset
1349 externC int pthread_mutexattr_getprioceiling ( pthread_mutexattr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1350 int *prioceiling)
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jlarmour
parents:
diff changeset
1351 {
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jlarmour
parents:
diff changeset
1352 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1353
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1354 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1355
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1356 if( prioceiling != NULL )
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jlarmour
parents:
diff changeset
1357 *prioceiling = attr->prioceiling;
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jlarmour
parents:
diff changeset
1358
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1359 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1360 }
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jlarmour
parents:
diff changeset
1361
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1362 // Set priority ceiling of given mutex, returning old ceiling.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1363 externC int pthread_mutex_setprioceiling( pthread_mutex_t *mutex,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1364 int prioceiling,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1365 int *old_ceiling)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1366 {
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jlarmour
parents:
diff changeset
1367 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1368
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jlarmour
parents:
diff changeset
1369 PTHREAD_CHECK(mutex);
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jlarmour
parents:
diff changeset
1370
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jlarmour
parents:
diff changeset
1371 pthread_mutex_lock( mutex );
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jlarmour
parents:
diff changeset
1372
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jlarmour
parents:
diff changeset
1373 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1374
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1375 if( old_ceiling != NULL )
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jlarmour
parents:
diff changeset
1376 *old_ceiling = mx->get_ceiling();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1377
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jlarmour
parents:
diff changeset
1378 mx->set_ceiling( prioceiling );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1379
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jlarmour
parents:
diff changeset
1380 pthread_mutex_unlock( mutex );
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jlarmour
parents:
diff changeset
1381
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1382 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1383 }
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jlarmour
parents:
diff changeset
1384
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1385 // Get priority ceiling of given mutex
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jlarmour
parents:
diff changeset
1386 externC int pthread_mutex_getprioceiling( pthread_mutex_t *mutex,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1387 int *prioceiling)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1388 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1389 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1390
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1391 PTHREAD_CHECK(mutex);
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jlarmour
parents:
diff changeset
1392
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1393 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1394
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1395 if( prioceiling != NULL )
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jlarmour
parents:
diff changeset
1396 *prioceiling = mx->get_ceiling();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1397
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1398 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1399 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1400
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1401 #endif // defined(_POSIX_THREAD_PRIO_PROTECT)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1402
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1403 #endif // defined(_POSIX_THREAD_PRIO_INHERIT) || defined(_POSIX_THREAD_PRIO_PROTECT)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1404
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1405 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1406 // Mutex functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1407
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1408 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1409 // Initialize mutex. If mutex_attr is NULL, use default attributes.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1410
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1411 externC int pthread_mutex_init (pthread_mutex_t *mutex,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1412 const pthread_mutexattr_t *mutex_attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1413 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1414 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1415
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1416 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1417
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1418 pthread_mutexattr_t use_attr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1419
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1420 // Set up the attributes we are going to use
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1421 if( mutex_attr == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1422 pthread_mutexattr_init( &use_attr );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1423 else use_attr = *mutex_attr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1424
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1425 // Now translate the POSIX protocol identifier into the eCos one.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1426 Cyg_Mutex::cyg_protcol protocol;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1427
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1428 switch( use_attr.protocol )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1429 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1430 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1431 case PTHREAD_PRIO_PROTECT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1432 protocol = Cyg_Mutex::CEILING;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1433 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1434 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1435 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1436 case PTHREAD_PRIO_INHERIT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1437 protocol = Cyg_Mutex::INHERIT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1438 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1439 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1440 case PTHREAD_PRIO_NONE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1441 protocol = Cyg_Mutex::NONE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1442 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1443
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1444 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1445 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1446 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1447
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1448 Cyg_Mutex *mx = new((cyg_uint8 *)mutex) Cyg_Mutex( protocol );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1449
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1450 if ( protocol == Cyg_Mutex::CEILING )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1451 mx->set_ceiling( use_attr.prioceiling );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1452
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1453 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1454 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1455
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1456 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1457 // Destroy mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1458
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1459 externC int pthread_mutex_destroy (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1460 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1461 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1462
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1463 int err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1464
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1465 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1466
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1467 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1468
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1469 if( mx->get_owner() != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1470 err = EBUSY;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1471 else mx->~Cyg_Mutex();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1472
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1473 PTHREAD_RETURN(err);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1474 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1475
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1476 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1477 // Lock mutex, waiting for it if necessary.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1478
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1479 externC int pthread_mutex_lock (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1480 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1481 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1482
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1483 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1484
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1485 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1486
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1487 if( mx->get_owner() == Cyg_Thread::self() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1488 PTHREAD_RETURN(EDEADLK);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1489
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1490 // Loop here until we acquire the mutex. Even if we are kicked out
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1491 // of the wait by a signal or release we must retry.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1492 while( !mx->lock() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1493 continue;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1494
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1495 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1496 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1497
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1498 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1499 // Try to lock mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1500
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1501 externC int pthread_mutex_trylock (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1502 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1503 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1504
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1505 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1506
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1507 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1508
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1509 if( mx->get_owner() == Cyg_Thread::self() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1510 PTHREAD_RETURN(EDEADLK);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1511
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1512 if( mx->trylock() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1513 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1514
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1515 PTHREAD_RETURN(EBUSY);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1516 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1517
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1518
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1519 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1520 // Unlock mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1521
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1522 externC int pthread_mutex_unlock (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1523 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1524 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1525
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1526 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1527
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1528 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1529
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1530 mx->unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1531
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1532 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1533 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1534
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1535
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1536 //=============================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1537 // Condition Variables
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1538
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1539 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1540 // Attribute manipulation functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1541 // We do not actually support any attributes at present, so these do nothing.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1542
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1543 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1544 // Initialize condition variable attributes
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1545
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1546 externC int pthread_condattr_init (pthread_condattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1547 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1548 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1549
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1550 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1551
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1552 // There are no condition variable attributes at present
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1553
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1554 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1555 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1556
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1557 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1558 // Destroy condition variable attributes
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1559
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1560 externC int pthread_condattr_destroy (pthread_condattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1561 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1562 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1563
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1564 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1565
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1566 // nothing to do here...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1567
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1568 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1569 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1570
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1571 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1572 // Condition variable functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1573
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1574 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1575 // Initialize condition variable.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1576
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1577 externC int pthread_cond_init (pthread_cond_t *cond,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1578 const pthread_condattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1579 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1580 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1581
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1582 PTHREAD_CHECK( cond );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1583
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1584 Cyg_Condition_Variable *cv =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1585 new((cyg_uint8 *)cond) Cyg_Condition_Variable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1586
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1587 cv = cv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1588
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1589 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1590 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1591
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1592 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1593 // Destroy condition variable.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1594
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1595 externC int pthread_cond_destroy (pthread_cond_t *cond)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1596 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1597 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1598
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1599 PTHREAD_CHECK( cond );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1600
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1601 ((Cyg_Condition_Variable *)cond)->~Cyg_Condition_Variable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1602
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1603 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1604 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1605
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1606 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1607 // Wake up one thread waiting for condition variable
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1608
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1609 externC int pthread_cond_signal (pthread_cond_t *cond)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1610 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1611 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1612
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jlarmour
parents:
diff changeset
1613 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1614
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jlarmour
parents:
diff changeset
1615 ((Cyg_Condition_Variable *)cond)->signal();
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jlarmour
parents:
diff changeset
1616
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jlarmour
parents:
diff changeset
1617 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1618 }
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jlarmour
parents:
diff changeset
1619
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jlarmour
parents:
diff changeset
1620 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1621 // Wake up all threads waiting for condition variable
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jlarmour
parents:
diff changeset
1622
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jlarmour
parents:
diff changeset
1623 externC int pthread_cond_broadcast (pthread_cond_t *cond)
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jlarmour
parents:
diff changeset
1624 {
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jlarmour
parents:
diff changeset
1625 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1626
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jlarmour
parents:
diff changeset
1627 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1628
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jlarmour
parents:
diff changeset
1629 ((Cyg_Condition_Variable *)cond)->broadcast();
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jlarmour
parents:
diff changeset
1630
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jlarmour
parents:
diff changeset
1631 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1632 }
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jlarmour
parents:
diff changeset
1633
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jlarmour
parents:
diff changeset
1634 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1635 // Block on condition variable until signalled. The mutex is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1636 // assumed to be locked before this call, will be unlocked
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jlarmour
parents:
diff changeset
1637 // during the wait, and will be re-locked on wakeup.
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jlarmour
parents:
diff changeset
1638
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jlarmour
parents:
diff changeset
1639 externC int pthread_cond_wait (pthread_cond_t *cond,
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jlarmour
parents:
diff changeset
1640 pthread_mutex_t *mutex)
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jlarmour
parents:
diff changeset
1641 {
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jlarmour
parents:
diff changeset
1642 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1643
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jlarmour
parents:
diff changeset
1644 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1645 PTHREAD_CHECK( mutex );
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jlarmour
parents:
diff changeset
1646
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jlarmour
parents:
diff changeset
1647 ((Cyg_Condition_Variable *)cond)->wait( *(Cyg_Mutex *)mutex );
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jlarmour
parents:
diff changeset
1648
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jlarmour
parents:
diff changeset
1649 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1650 }
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parents:
diff changeset
1651
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jlarmour
parents:
diff changeset
1652 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1653 // Block on condition variable until signalled, or the timeout expires.
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jlarmour
parents:
diff changeset
1654
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jlarmour
parents:
diff changeset
1655 externC int pthread_cond_timedwait (pthread_cond_t *cond,
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jlarmour
parents:
diff changeset
1656 pthread_mutex_t *mutex,
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jlarmour
parents:
diff changeset
1657 const struct timespec *abstime)
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jlarmour
parents:
diff changeset
1658 {
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jlarmour
parents:
diff changeset
1659 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1660
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jlarmour
parents:
diff changeset
1661 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1662 PTHREAD_CHECK( mutex );
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jlarmour
parents:
diff changeset
1663 PTHREAD_CHECK( abstime );
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jlarmour
parents:
diff changeset
1664
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jlarmour
parents:
diff changeset
1665 cyg_tick_count ticks;
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jlarmour
parents:
diff changeset
1666 struct Cyg_Clock::converter ns_converter, sec_converter;
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jlarmour
parents:
diff changeset
1667
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jlarmour
parents:
diff changeset
1668 Cyg_Clock::real_time_clock->get_other_to_clock_converter( 1, &ns_converter );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1669 Cyg_Clock::real_time_clock->get_other_to_clock_converter( 1000000000, &sec_converter );
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jlarmour
parents:
diff changeset
1670
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jlarmour
parents:
diff changeset
1671 ticks = Cyg_Clock::convert( abstime->tv_sec, &sec_converter );
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jlarmour
parents:
diff changeset
1672 ticks += Cyg_Clock::convert( abstime->tv_nsec, &ns_converter );
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jlarmour
parents:
diff changeset
1673
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jlarmour
parents:
diff changeset
1674 ((Cyg_Condition_Variable *)cond)->wait( *(Cyg_Mutex *)mutex, ticks );
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jlarmour
parents:
diff changeset
1675
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jlarmour
parents:
diff changeset
1676 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1677 }
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jlarmour
parents:
diff changeset
1678
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jlarmour
parents:
diff changeset
1679 //=============================================================================
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jlarmour
parents:
diff changeset
1680 // Dynamic package initialization
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jlarmour
parents:
diff changeset
1681 // Call init_routine just the once per control variable.
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jlarmour
parents:
diff changeset
1682
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jlarmour
parents:
diff changeset
1683 externC int pthread_once (pthread_once_t *once_control,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1684 void (*init_routine) (void))
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jlarmour
parents:
diff changeset
1685 {
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jlarmour
parents:
diff changeset
1686 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1687
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jlarmour
parents:
diff changeset
1688 PTHREAD_CHECK( once_control );
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jlarmour
parents:
diff changeset
1689 PTHREAD_CHECK( init_routine );
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jlarmour
parents:
diff changeset
1690
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jlarmour
parents:
diff changeset
1691 pthread_once_t old;
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jlarmour
parents:
diff changeset
1692
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1693 // Do a test and set on the once_control object.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1694 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1695
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jlarmour
parents:
diff changeset
1696 old = *once_control;
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jlarmour
parents:
diff changeset
1697 *once_control = 1;
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jlarmour
parents:
diff changeset
1698
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jlarmour
parents:
diff changeset
1699 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1700
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jlarmour
parents:
diff changeset
1701 // If the once_control was zero, call the init_routine().
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1702 if( !old ) init_routine();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1703
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1704 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1705 }
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jlarmour
parents:
diff changeset
1706
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1707
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1708 //=============================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1709 //Thread specific data
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jlarmour
parents:
diff changeset
1710
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1711 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1712 // Create a key to identify a location in the thread specific data area.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1713 // Each thread has its own distinct thread-specific data area but all are
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1714 // addressed by the same keys. The destructor function is called whenever a
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1715 // thread exits and the value associated with the key is non-NULL.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1716
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jlarmour
parents:
diff changeset
1717 externC int pthread_key_create (pthread_key_t *key,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1718 void (*destructor) (void *))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1719 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1720 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1721
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1722 pthread_key_t k = -1;
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jlarmour
parents:
diff changeset
1723
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jlarmour
parents:
diff changeset
1724 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1725
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1726 // Find a key to allocate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1727 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1728 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1729 if( thread_key[i] != 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1730 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1731 // We have a table slot with space available
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1732
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1733 // Get index of ls set bit.
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jlarmour
parents:
diff changeset
1734 HAL_LSBIT_INDEX( k, thread_key[i] );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1735
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1736 // clear it
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1737 thread_key[i] &= ~(1<<k);
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jlarmour
parents:
diff changeset
1738
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1739 // Add index of word
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1740 k += i * KEY_MAP_TYPE_SIZE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1741
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1742 // Install destructor
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jlarmour
parents:
diff changeset
1743 key_destructor[k] = destructor;
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jlarmour
parents:
diff changeset
1744
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1745 // break out with key found
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1746 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1747 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1748 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1749
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1750 if( k != -1 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1751 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1752 // plant a NULL in all the valid thread data slots for this
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1753 // key in case we are reusing a key we used before.
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jlarmour
parents:
diff changeset
1754
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1755 for( cyg_ucount32 i = 0; i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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jlarmour
parents:
diff changeset
1756 {
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jlarmour
parents:
diff changeset
1757 pthread_info *thread = thread_table[i];
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jlarmour
parents:
diff changeset
1758
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jlarmour
parents:
diff changeset
1759 if( thread != NULL && thread->thread_data != NULL )
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jlarmour
parents:
diff changeset
1760 thread->thread_data[k] = NULL;
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jlarmour
parents:
diff changeset
1761 }
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jlarmour
parents:
diff changeset
1762 }
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jlarmour
parents:
diff changeset
1763
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1764 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1765
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jlarmour
parents:
diff changeset
1766 if( k == -1 ) PTHREAD_RETURN(EAGAIN);
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jlarmour
parents:
diff changeset
1767
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jlarmour
parents:
diff changeset
1768 *key = k;
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jlarmour
parents:
diff changeset
1769
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jlarmour
parents:
diff changeset
1770 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1771 }
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jlarmour
parents:
diff changeset
1772
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jlarmour
parents:
diff changeset
1773 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1774 // Delete key.
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jlarmour
parents:
diff changeset
1775
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jlarmour
parents:
diff changeset
1776 externC int pthread_key_delete (pthread_key_t key)
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jlarmour
parents:
diff changeset
1777 {
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jlarmour
parents:
diff changeset
1778 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1779
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jlarmour
parents:
diff changeset
1780 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1781
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jlarmour
parents:
diff changeset
1782 // Set the key bit to 1 to indicate it is free.
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jlarmour
parents:
diff changeset
1783 thread_key[key/KEY_MAP_TYPE_SIZE] |= 1<<(key%(KEY_MAP_TYPE_SIZE));
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jlarmour
parents:
diff changeset
1784
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jlarmour
parents:
diff changeset
1785 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1786
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jlarmour
parents:
diff changeset
1787 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1788 }
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jlarmour
parents:
diff changeset
1789
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1790 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1791 // Store the pointer value in the thread-specific data slot addressed
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jlarmour
parents:
diff changeset
1792 // by the key.
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jlarmour
parents:
diff changeset
1793
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jlarmour
parents:
diff changeset
1794 externC int pthread_setspecific (pthread_key_t key, const void *pointer)
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jlarmour
parents:
diff changeset
1795 {
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jlarmour
parents:
diff changeset
1796 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1797
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1798 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1799 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1800
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jlarmour
parents:
diff changeset
1801 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1802
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jlarmour
parents:
diff changeset
1803 if( self->thread_data == NULL )
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jlarmour
parents:
diff changeset
1804 {
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jlarmour
parents:
diff changeset
1805 // Allocate the per-thread data table
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jlarmour
parents:
diff changeset
1806 self->thread_data =
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jlarmour
parents:
diff changeset
1807 (void **)self->thread->increment_stack_limit(
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jlarmour
parents:
diff changeset
1808 PTHREAD_KEYS_MAX * sizeof(void *) );
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jlarmour
parents:
diff changeset
1809
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jlarmour
parents:
diff changeset
1810 // Clear out all entries
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1811 for( int i = 0; i < PTHREAD_KEYS_MAX; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1812 self->thread_data[i] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1813 }
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jlarmour
parents:
diff changeset
1814
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jlarmour
parents:
diff changeset
1815 self->thread_data[key] = (void *)pointer;
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jlarmour
parents:
diff changeset
1816
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jlarmour
parents:
diff changeset
1817 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1818 }
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jlarmour
parents:
diff changeset
1819
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1820 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1821 // Retrieve the pointer value in the thread-specific data slot addressed
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jlarmour
parents:
diff changeset
1822 // by the key.
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jlarmour
parents:
diff changeset
1823
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jlarmour
parents:
diff changeset
1824 externC void *pthread_getspecific (pthread_key_t key)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1825 {
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jlarmour
parents:
diff changeset
1826 void *val;
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jlarmour
parents:
diff changeset
1827 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1828
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jlarmour
parents:
diff changeset
1829 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
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jlarmour
parents:
diff changeset
1830 PTHREAD_RETURN(NULL);
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jlarmour
parents:
diff changeset
1831
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jlarmour
parents:
diff changeset
1832 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1833
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jlarmour
parents:
diff changeset
1834 if( self->thread_data == NULL )
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jlarmour
parents:
diff changeset
1835 val = NULL;
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jlarmour
parents:
diff changeset
1836 else val = self->thread_data[key];
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jlarmour
parents:
diff changeset
1837
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jlarmour
parents:
diff changeset
1838 PTHREAD_RETURN(val);
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jlarmour
parents:
diff changeset
1839 }
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jlarmour
parents:
diff changeset
1840
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jlarmour
parents:
diff changeset
1841 //=============================================================================
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jlarmour
parents:
diff changeset
1842 // Thread Cancellation Functions
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jlarmour
parents:
diff changeset
1843
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1844 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1845 // Set cancel state of current thread to ENABLE or DISABLE.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1846 // Returns old state in *oldstate.
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jlarmour
parents:
diff changeset
1847
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1848 externC int pthread_setcancelstate (int state, int *oldstate)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1849 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1850 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1851
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1852 if( state != PTHREAD_CANCEL_ENABLE &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1853 state != PTHREAD_CANCEL_DISABLE )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1854 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1855
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1856 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1857
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1858 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1859
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1860 if( oldstate != NULL ) *oldstate = self->cancelstate;
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jlarmour
parents:
diff changeset
1861
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jlarmour
parents:
diff changeset
1862 self->cancelstate = state;
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jlarmour
parents:
diff changeset
1863
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jlarmour
parents:
diff changeset
1864 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1865
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1866 // Note: This function may have made it possible for a pending
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1867 // cancellation to now be delivered. However the standard does not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1868 // list this function as a cancellation point, so for now we do
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1869 // nothing. In future we might call pthread_testcancel() here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1870
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jlarmour
parents:
diff changeset
1871 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1872 }
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jlarmour
parents:
diff changeset
1873
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1874 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1875 // Set cancel type of current thread to ASYNCHRONOUS or DEFERRED.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1876 // Returns old type in *oldtype.
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jlarmour
parents:
diff changeset
1877
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1878 externC int pthread_setcanceltype (int type, int *oldtype)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1879 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1880 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1881
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1882 if( type != PTHREAD_CANCEL_ASYNCHRONOUS &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1883 type != PTHREAD_CANCEL_DEFERRED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1884 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1885
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1886 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1887
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1888 pthread_info *self = pthread_self_info();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1889
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1890 if( oldtype != NULL ) *oldtype = self->canceltype;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1891
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1892 self->canceltype = type;
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jlarmour
parents:
diff changeset
1893
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1894 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1895
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1896 // Note: This function may have made it possible for a pending
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1897 // cancellation to now be delivered. However the standard does not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1898 // list this function as a cancellation point, so for now we do
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1899 // nothing. In future we might call pthread_testcancel() here.
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1900
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1901 PTHREAD_RETURN(0);
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1902 }
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1903
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1904 //-----------------------------------------------------------------------------
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1905 // Cancel the thread.
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1906
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1907 externC int pthread_cancel (pthread_t thread)
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1908 {
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1909 PTHREAD_ENTRY();
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1910
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1911 pthread_mutex.lock();
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1912
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1913 pthread_info *th = pthread_info_id(thread);
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1914
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1915 if( th == NULL )
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1916 {
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1917 pthread_mutex.unlock();
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1918 PTHREAD_RETURN(ESRCH);
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1919 }
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1920
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1921 th->cancelpending = true;
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1922
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1923 if( th->cancelstate == PTHREAD_CANCEL_ENABLE &&
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1924 th->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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1925 {
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1926 // If the thread has cancellation enabled, and it is in
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1927 // asynchronous mode, set the eCos thread's ASR pending to
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1928 // deal with it when the thread wakes up. We also release the
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1929 // thread out of any current wait to make it wake up.
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1930
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1931 th->thread->set_asr_pending();
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1932 th->thread->release();
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1933 }
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1934 // Otherwise the thread either has cancellation disabled, or is
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1935 // in deferred mode. In either case it is up to the thread to
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1936 // get into a state to deal with the pending cancellation.
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1937
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1938 pthread_mutex.unlock();
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1939
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1940
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1941 PTHREAD_RETURN(0);
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1942 }
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1943
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1944 //-----------------------------------------------------------------------------
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1945 // Test for a pending cancellation for the current thread and terminate
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1946 // the thread if there is one.
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1947
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1948 externC void pthread_testcancel (void)
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1949 {
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1950 PTHREAD_ENTRY_VOID();
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1951
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1952 pthread_info *self = pthread_self_info();
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1953
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1954 // Check whether there is a cancel pending and if so, whether
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1955 // cancellations are enabled. We do it in this order to reduce the
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1956 // number of tests in the common case - when no cancellations are
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1957 // pending.
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1958
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1959 if( self->cancelpending &&
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1960 self->cancelstate == PTHREAD_CANCEL_ENABLE )
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1961
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1962 {
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1963 // If we have cancellation enabled, and there is a cancellation
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1964 // pending, then go ahead and do the deed.
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1965
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1966 // Exit now with special retval. pthread_exit() calls the
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1967 // cancellation handlers implicitly.
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1968 pthread_exit(PTHREAD_CANCELED);
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1969 }
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1970
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1971 PTHREAD_RETURN_VOID;
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1972 }
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1973
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1974 //-----------------------------------------------------------------------------
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1975 // These two functions actually implement the cleanup push and pop functionality.
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1976
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1977 externC void pthread_cleanup_push_inner (struct pthread_cleanup_buffer *buffer,
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1978 void (*routine) (void *),
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1979 void *arg)
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1980 {
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1981 PTHREAD_ENTRY();
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1982
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1983 pthread_info *self = pthread_self_info();
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1984
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1985 buffer->routine = routine;
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1986 buffer->arg = arg;
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1987
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1988 buffer->prev = self->cancelbuffer;
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1989
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1990 self->cancelbuffer = buffer;
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1991
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1992 return;
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1993 }
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1994
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1995 externC void pthread_cleanup_pop_inner (struct pthread_cleanup_buffer *buffer,
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1996 int execute)
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1997 {
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1998 PTHREAD_ENTRY();
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1999
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2000 pthread_info *self = pthread_self_info();
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2001
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2002 CYG_ASSERT( self->cancelbuffer == buffer, "Stacking error in cleanup buffers");
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2003
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2004 if( self->cancelbuffer == buffer )
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2005 {
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2006 // Remove the buffer from the stack
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2007 self->cancelbuffer = buffer->prev;
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2008 }
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2009 else
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2010 {
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2011 // If the top of the stack is not the buffer we expect, do not
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2012 // execute it.
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2013 execute = 0;
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2014 }
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2015
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2016 if( execute ) buffer->routine(buffer->arg);
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2017
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2018 return;
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2019 }
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2020
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2021
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2022 // -------------------------------------------------------------------------
147
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2023 // eCos-specific function to measure stack usage of the supplied thread
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2024
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2025 #ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT
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2026 externC size_t pthread_measure_stack_usage (pthread_t thread)
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2027 {
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2028 pthread_info *th = pthread_info_id(thread);
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2029
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2030 if ( NULL == th )
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2031 return (size_t)-1;
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2032
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2033 return (size_t)th->thread->measure_stack_usage();
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2034 }
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2035 #endif
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2036
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2037 // -------------------------------------------------------------------------
115
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2038 // EOF pthread.cxx