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annotate packages/compat/posix/current/src/pthread.cxx @ 128:0c2b7be0d798 ecos-sw-2000-10-12

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