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annotate packages/compat/posix/current/src/pthread.cxx @ 191:678094f34118

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Merge from eCos master repository on 2001-10-19-06:43:02-BST
author jlarmour
date Fri, 19 Oct 2001 07:02:26 +0000
parents 4c750ce71ae3
children e0c0827131d1
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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) 2000, 2001 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg
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35 // Contributors: nickg, jlarmour
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36 // Date: 2000-03-27
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37 // Purpose: POSIX pthread implementation
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38 // Description: This file contains the implementation of the POSIX pthread
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39 // functions.
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40 //
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41 //
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42 //
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43 //####DESCRIPTIONEND####
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44 //
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45 //==========================================================================
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46
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47 #include <pkgconf/hal.h>
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48 #include <pkgconf/kernel.h>
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49 #include <pkgconf/posix.h>
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50 #include <pkgconf/isoinfra.h>
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51 #include <pkgconf/libc_startup.h>
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52
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53 #include <cyg/kernel/ktypes.h> // base kernel types
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54 #include <cyg/infra/cyg_trac.h> // tracing macros
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55 #include <cyg/infra/cyg_ass.h> // assertion macros
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56
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57 #include "pprivate.h" // POSIX private header
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58
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59 #include <stdlib.h> // malloc(), free()
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60
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61 #include <cyg/kernel/sched.hxx> // scheduler definitions
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62 #include <cyg/kernel/thread.hxx> // thread definitions
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63 #include <cyg/kernel/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 data structures
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88
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89 // Mutex for controlling access to shared data structures
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90 Cyg_Mutex pthread_mutex CYGBLD_POSIX_INIT;
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91
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92 // Array of pthread control structures. A pthread_t object is
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93 // "just" an index into this array.
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94 static pthread_info *thread_table[CYGNUM_POSIX_PTHREAD_THREADS_MAX];
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95
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96 // Count of number of threads in table.
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97 static int pthread_count = 0;
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98
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99 // Count of number of threads that have exited and not been reaped.
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100 static int pthreads_exited;
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101
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102 // Count of number of threads that are waiting to be joined
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103 static int pthreads_tobejoined;
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104
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105 // Per-thread key allocation. This key map has a 1 bit set for each
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106 // key that is free, zero if it is allocated.
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107 #define KEY_MAP_TYPE cyg_uint32
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108 #define KEY_MAP_TYPE_SIZE (sizeof(KEY_MAP_TYPE)*8) // in BITS!
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109 static KEY_MAP_TYPE thread_key[PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE];
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110 static void (*key_destructor[PTHREAD_KEYS_MAX]) (void *);
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111
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112 // Index of next pthread_info to allocate from thread_table array.
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113 static int thread_info_next = 0;
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114
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115 // This is used to make pthread_t values unique even when reusing
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116 // a table slot. This allows CYGNUM_POSIX_PTHREAD_THREADS_MAX to range
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117 // up to 1024.
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118 #define THREAD_ID_COOKIE_INC 0x00000400
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119 #define THREAD_ID_COOKIE_MASK (THREAD_ID_COOKIE_INC-1)
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120 static pthread_t thread_id_cookie = THREAD_ID_COOKIE_INC;
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121
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122 //-----------------------------------------------------------------------------
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123 // Main thread.
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124
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125 #define MAIN_DEFAULT_STACK_SIZE \
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126 (CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE < PTHREAD_STACK_MIN \
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127 ? PTHREAD_STACK_MIN : CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE)
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128
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129 static char main_stack[MAIN_DEFAULT_STACK_SIZE];
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130
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131 // Thread ID of main thread.
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132 static pthread_t main_thread;
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133
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134 //=============================================================================
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135 // Exported variables
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136
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137 int pthread_canceled_dummy_var; // pointed to by PTHREAD_CANCELED
115
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138
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139 //=============================================================================
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140 // Internal functions
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141
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142 //-----------------------------------------------------------------------------
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143 // Private version of pthread_self() that returns a pointer to our internal
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144 // control structure.
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145
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146 pthread_info *pthread_self_info(void)
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147 {
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148 Cyg_Thread *thread = Cyg_Thread::self();
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149
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150 CYG_CHECK_DATA_PTR(thread, "Illegal current thread");
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151
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152 pthread_info *info = (pthread_info *)thread->get_data(CYGNUM_KERNEL_THREADS_DATA_POSIX);
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153
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154 // CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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155
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156 return info;
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157 }
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158
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159 externC pthread_info *pthread_info_id( pthread_t id )
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160 {
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161 pthread_t index = id & THREAD_ID_COOKIE_MASK;
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162
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163 pthread_info *info = thread_table[index];
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164
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165 // Check for a valid entry
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166 if( info == NULL )
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167 return NULL;
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168
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169 // Check that this is a valid entry
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170 if ( info->state == PTHREAD_STATE_FREE ||
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171 info->state == PTHREAD_STATE_EXITED )
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172 return NULL;
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173
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174 // Check that the entry matches the id
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175 if( info->id != id ) return NULL;
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176
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177 // Return the pointer
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178 return info;
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179 }
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180
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181 //-----------------------------------------------------------------------------
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182 // new operator to allow us to invoke the Cyg_Thread constructor on the
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183 // pthread_info.thread_obj array.
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184
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185 inline void *operator new(size_t size, cyg_uint8 *ptr) { return (void *)ptr; };
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186
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187 //-----------------------------------------------------------------------------
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188 // Optional memory allocation functions for pthread stacks.
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189 // If there is an implementation of malloc() available, define pthread_malloc()
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190 // and pthread_free() to use it. Otherwise define them to do nothing.
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191 // In the future we may want to add configuration here to permit thread stacks
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192 // to be allocated in a nominated memory pool separate from the standard malloc()
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193 // pool. Hence the (currently redundant) encapsulation of these functions.
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194
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195 #if CYGINT_ISO_MALLOC
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196
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197 static __inline__ CYG_ADDRWORD pthread_malloc( CYG_ADDRWORD size )
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198 {
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199 return (CYG_ADDRWORD)malloc( size );
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200 }
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201
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202 static __inline__ void pthread_free( CYG_ADDRWORD m )
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203 {
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204 free( (void *)m );
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205 }
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206
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207 #define PTHREAD_MALLOC
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208
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209 #else
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210
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211 #define pthread_malloc(_x_) (0)
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212
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213 #define pthread_free(_x_)
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214
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215 #endif
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216
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217 //-----------------------------------------------------------------------------
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218 // pthread entry function.
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219 // does some housekeeping and then calls the user's start routine.
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220
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221 static void pthread_entry(CYG_ADDRWORD data)
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222 {
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223 pthread_info *self = (pthread_info *)data;
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224
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225 void *retval = self->start_routine(self->start_arg);
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226
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227 pthread_exit( retval );
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228 }
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229
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230 //-----------------------------------------------------------------------------
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231 // Main entry function.
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232 // This is set as the start_routine of the main thread. It invokes main()
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233 // and if it returns, shuts down the system.
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234
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235 externC void cyg_libc_invoke_main( void );
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236
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237 static void *call_main( void * )
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238 {
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239 cyg_libc_invoke_main();
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240 return NULL; // placate compiler
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241 }
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242
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243 //-----------------------------------------------------------------------------
151
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244 // Check whether there is a cancel pending and if so, whether
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245 // cancellations are enabled. We do it in this order to reduce the
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246 // number of tests in the common case - when no cancellations are
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247 // pending.
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248 // We make this inline so it can be called directly below for speed
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249
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250 static __inline__ int
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251 checkforcancel( void )
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252 {
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253 pthread_info *self = pthread_self_info();
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254
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255 if( self != NULL &&
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256 self->cancelpending &&
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257 self->cancelstate == PTHREAD_CANCEL_ENABLE )
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258 return 1;
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259 else
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260 return 0;
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261 }
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262
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263
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264 //-----------------------------------------------------------------------------
115
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265 // POSIX ASR
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266 // This is installed as the ASR for all POSIX threads.
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267
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268 static void posix_asr( CYG_ADDRWORD data )
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269 {
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270 pthread_info *self = (pthread_info *)data;
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271
191
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272 #ifdef CYGPKG_POSIX_TIMERS
115
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273 // Call into timer subsystem to deliver any pending
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274 // timer expirations.
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275 cyg_posix_timer_asr(self);
191
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276 #endif
115
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277
191
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278 #ifdef CYGPKG_POSIX_SIGNALS
115
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279 // Call signal subsystem to deliver any signals
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280 cyg_posix_signal_asr(self);
191
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281 #endif
115
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282
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283 // Check for cancellation
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284 if( self->cancelpending &&
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285 self->cancelstate == PTHREAD_CANCEL_ENABLE &&
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286 self->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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287 {
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288 // If we have a pending cancellation, cancellations are
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289 // enabled and we are in asynchronous mode, then we can do the
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290 // cancellation processing. Since pthread_exit() does
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291 // everything we need to do, we just call that here.
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292
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293 pthread_exit(PTHREAD_CANCELED);
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294 }
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295 }
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296
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297 //-----------------------------------------------------------------------------
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298 // The (Grim) Reaper.
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299 // This function is called to tidy up and dispose of any threads that have
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300 // exited. This work must be done from a thread other than the one exiting.
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301 // Note: this function _must_ be called with pthread_mutex locked.
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302
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303 static void pthread_reap()
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304 {
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305 int i;
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306
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307 // Loop over the thread table looking for exited threads. The
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308 // pthreads_exited counter springs us out of this once we have
128
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309 // found them all (and keeps us out if there are none to do).
115
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310
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311 for( i = 0; pthreads_exited && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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312 {
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313 pthread_info *thread = thread_table[i];
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314
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315 if( thread != NULL && thread->state == PTHREAD_STATE_EXITED )
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316 {
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317 // The thread has exited, so it is a candidate for being
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318 // reaped. We have to make sure that the eCos thread has
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319 // also reached EXITED state before we can tidy it up.
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320
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321 while( thread->thread->get_state() != Cyg_Thread::EXITED )
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322 {
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323 // The eCos thread has not yet exited. This is
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324 // probably because its priority is too low to allow
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325 // it to complete. We fix this here by raising its
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326 // priority to equal ours and then yielding. This
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327 // should eventually get it into exited state.
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328
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329 Cyg_Thread *self = Cyg_Thread::self();
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330
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331 // Set thread's priority to our current dispatching priority.
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332 thread->thread->set_priority( self->get_current_priority() );
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333
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334 // Yield, yield
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335 self->yield();
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336
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337 // and keep looping until he exits.
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338 }
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339
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340 // At this point we have a thread that we can reap.
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341
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342 // destroy the eCos thread
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343 thread->thread->~Cyg_Thread();
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344
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345 // destroy the joiner condvar
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346 thread->joiner->~Cyg_Condition_Variable();
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347
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348 #ifdef CYGPKG_POSIX_SIGNALS
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349 // Destroy signal handling fields
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350 cyg_posix_thread_sigdestroy( thread );
191
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351 #endif
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352
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353 // Free the stack if we allocated it
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354 if( thread->freestack )
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355 pthread_free( thread->stackmem );
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356
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357 // Finally, set the thread table entry to NULL so that it
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358 // may be reused.
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359 thread_table[i] = NULL;
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360
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361 pthread_count--;
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362 pthreads_exited--;
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363 }
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364 }
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365 }
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366
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367 //=============================================================================
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368 // Functions exported to rest of POSIX subsystem.
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369
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370 //-----------------------------------------------------------------------------
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371 // Create the main() thread.
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372
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373 externC void cyg_posix_pthread_start( void )
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374 {
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375
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376 // Initialize the per-thread data key map.
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377
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378 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
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379 {
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380 thread_key[i] = ~0;
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381 }
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382
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383 // Create the main thread
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384 pthread_attr_t attr;
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385 struct sched_param schedparam;
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386
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387 schedparam.sched_priority = CYGNUM_POSIX_MAIN_DEFAULT_PRIORITY;
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388
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389 pthread_attr_init( &attr );
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390 pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
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391 pthread_attr_setstackaddr( &attr, &main_stack[sizeof(main_stack)] );
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392 pthread_attr_setstacksize( &attr, sizeof(main_stack) );
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393 pthread_attr_setschedpolicy( &attr, SCHED_RR );
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394 pthread_attr_setschedparam( &attr, &schedparam );
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395
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396 pthread_create( &main_thread, &attr, call_main, NULL );
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397 }
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398
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399 #ifdef CYGPKG_POSIX_SIGNALS
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400 //-----------------------------------------------------------------------------
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401 // Look for a thread that can accept delivery of any of the signals in
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402 // the mask and release it from any wait it is in. Since this may be
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403 // called from a DSR, it cannot use any locks internally - any locking
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404 // should be done before the call.
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405
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406 externC void cyg_posix_pthread_release_thread( sigset_t *mask )
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407 {
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408 int i;
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409 int count = pthread_count;
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410
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411 // Loop over the thread table looking for a thread that has a
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412 // signal mask that does not mask all the signals in mask.
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413 // FIXME: find a more efficient way of doing this.
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414
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415 for( i = 0; count > 0 && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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416 {
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417 pthread_info *thread = thread_table[i];
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418
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419 if( (thread != NULL) &&
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420 (thread->state <= PTHREAD_STATE_RUNNING) &&
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421 ((*mask & ~thread->sigmask) != 0) )
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422 {
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423 // This thread can service at least one of the signals in
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424 // *mask. Knock it out of its wait and make its ASR pending.
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425
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426 thread->thread->set_asr_pending();
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427 thread->thread->release();
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428 break;
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429 }
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430
128
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431 // Decrement count for each valid thread we find.
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432 if( thread != NULL && thread->state != PTHREAD_STATE_FREE )
115
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433 count--;
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434 }
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435 }
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436 #endif
115
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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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543
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544 // Set new next index
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545 thread_info_next = thread_next;
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546
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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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556 nthread->start_routine = start_routine;
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557 nthread->start_arg = arg;
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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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568
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569 #ifdef CYGVAR_KERNEL_THREADS_NAME
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diff changeset
570 // generate a name for this thread
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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
191
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591 #ifdef CYGPKG_POSIX_SIGNALS
115
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592 // Initialize signal specific fields.
136
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593 cyg_posix_thread_siginit( nthread, self );
191
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594 #endif
115
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595
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596 // create the underlying eCos thread
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597
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598 nthread->thread = new(&nthread->thread_obj[0])
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599 Cyg_Thread ( PTHREAD_ECOS_PRIORITY(use_attr.schedparam.sched_priority),
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600 pthread_entry,
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601 (CYG_ADDRWORD)nthread,
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602 name,
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603 stackbase,
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604 stacksize);
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605
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606 // Put pointer to pthread_info into eCos thread's per-thread data.
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607 nthread->thread->set_data( CYGNUM_KERNEL_THREADS_DATA_POSIX, (CYG_ADDRWORD)nthread );
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608
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609 // Set timeslice enable according to scheduling policy.
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610 if( use_attr.schedpolicy == SCHED_FIFO )
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611 nthread->thread->timeslice_disable();
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612 else nthread->thread->timeslice_enable();
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613
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614 // set up ASR and data
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615 nthread->thread->set_asr( posix_asr, (CYG_ADDRWORD)nthread, NULL, NULL );
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616
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617 // return thread ID
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618 *thread = nthread->id;
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619
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620 pthread_count++;
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621
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622 pthread_mutex.unlock();
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623
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624 // finally, set the thread going
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625 nthread->thread->resume();
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626
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627 PTHREAD_RETURN(0);
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628 }
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629
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630 //-----------------------------------------------------------------------------
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631 // Get current thread id.
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632
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633 externC pthread_t pthread_self ( void )
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634 {
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635 PTHREAD_ENTRY();
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636
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637 pthread_info *info = pthread_self_info();
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638
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639 CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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640
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641 return info->id;
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642 }
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643
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644 //-----------------------------------------------------------------------------
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645 // Compare two thread identifiers.
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646
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647 externC int pthread_equal (pthread_t thread1, pthread_t thread2)
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648 {
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649 PTHREAD_ENTRY();
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650
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651 return thread1 == thread2;
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652 }
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653
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654 //-----------------------------------------------------------------------------
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655 // Terminate current thread.
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656
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657 externC void exit(int) CYGBLD_ATTRIB_NORET;
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658
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659 externC void pthread_exit (void *retval)
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660 {
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661 PTHREAD_ENTRY();
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662
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663 pthread_info *self = pthread_self_info();
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664
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665 // Call cancellation handlers. We eat up the buffers as we go in
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666 // case any of the routines calls pthread_exit() itself.
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667 while( self->cancelbuffer != NULL )
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668 {
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669 struct pthread_cleanup_buffer *buffer = self->cancelbuffer;
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670
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671 self->cancelbuffer = buffer->prev;
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672
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673 buffer->routine(buffer->arg);
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674 }
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675
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676 if( self->thread_data != NULL )
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677 {
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678 // Call per-thread key destructors.
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679 // The specification of this is that we must continue to call the
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680 // destructor functions until all the per-thread data values are NULL or
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681 // we have done it PTHREAD_DESTRUCTOR_ITERATIONS times.
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682
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683 cyg_bool destructors_called;
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684 int destructor_iterations = 0;
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685
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diff changeset
686 do
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687 {
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688 destructors_called = false;
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689
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690 for( cyg_ucount32 key = 0; key < PTHREAD_KEYS_MAX; key++ )
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691 {
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692 // Skip unallocated keys
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693 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
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694 continue;
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695
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696 // Skip NULL destructors
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697 if( key_destructor[key] == NULL ) continue;
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698
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699 // Skip NULL data values
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700 if( self->thread_data[key] == NULL ) continue;
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701
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702 // If it passes all that, call the destructor
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703 key_destructor[key]((void *)(self->thread_data[key]));
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704
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705 // Record that we called a destructor
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706 destructors_called = true;
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707 }
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708
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709 // Count the iteration
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710 destructor_iterations++;
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711
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712 } while( destructors_called &&
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713 (destructor_iterations <= PTHREAD_DESTRUCTOR_ITERATIONS));
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714
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715 }
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716
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717 pthread_mutex.lock();
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718
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719 // Set the retval for any joiner
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720 self->retval = retval;
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721
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722 // If we are already detached, go to EXITED state, otherwise
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723 // go into JOIN state.
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diff changeset
724
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jlarmour
parents:
diff changeset
725 if ( PTHREAD_STATE_DETACHED == self->state ) {
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jlarmour
parents:
diff changeset
726 self->state = PTHREAD_STATE_EXITED;
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jlarmour
parents:
diff changeset
727 pthreads_exited++;
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jlarmour
parents:
diff changeset
728 } else {
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jlarmour
parents:
diff changeset
729 self->state = PTHREAD_STATE_JOIN;
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jlarmour
parents:
diff changeset
730 pthreads_tobejoined++;
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jlarmour
parents:
diff changeset
731 }
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jlarmour
parents:
diff changeset
732
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jlarmour
parents:
diff changeset
733 // Kick any waiting joiners
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jlarmour
parents:
diff changeset
734 self->joiner->broadcast();
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jlarmour
parents:
diff changeset
735
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jlarmour
parents:
diff changeset
736 cyg_bool call_exit=false;
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jlarmour
parents:
diff changeset
737
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jlarmour
parents:
diff changeset
738 // if this is the last thread (other than threads waiting to be joined)
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jlarmour
parents:
diff changeset
739 // then we need to call exit() later
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jlarmour
parents:
diff changeset
740 if ( pthreads_exited + pthreads_tobejoined == pthread_count )
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jlarmour
parents:
diff changeset
741 call_exit=true;
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jlarmour
parents:
diff changeset
742
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jlarmour
parents:
diff changeset
743 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
744
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jlarmour
parents:
diff changeset
745 // Finally, call the exit function; this will not return.
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jlarmour
parents:
diff changeset
746 if ( call_exit )
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jlarmour
parents:
diff changeset
747 ::exit(0);
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jlarmour
parents:
diff changeset
748 else
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jlarmour
parents:
diff changeset
749 self->thread->exit();
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jlarmour
parents:
diff changeset
750
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jlarmour
parents:
diff changeset
751 // 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
752 // 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
753 // call to abort() here in case Cyg_Thread::exit() returns.
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jlarmour
parents:
diff changeset
754
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jlarmour
parents:
diff changeset
755 for(;;) continue;
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jlarmour
parents:
diff changeset
756 }
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jlarmour
parents:
diff changeset
757
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jlarmour
parents:
diff changeset
758 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
759 // Wait for the thread to terminate. If thread_return is not NULL then
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jlarmour
parents:
diff changeset
760 // 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
761 // *thread_return.
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jlarmour
parents:
diff changeset
762
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jlarmour
parents:
diff changeset
763 externC int pthread_join (pthread_t thread, void **thread_return)
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jlarmour
parents:
diff changeset
764 {
152
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parents: 151
diff changeset
765 int err = 0;
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jlarmour
parents: 151
diff changeset
766
115
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jlarmour
parents:
diff changeset
767 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
768
151
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jlarmour
parents: 148
diff changeset
769 // check for cancellation first.
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jlarmour
parents: 148
diff changeset
770 pthread_testcancel();
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jlarmour
parents: 148
diff changeset
771
115
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jlarmour
parents:
diff changeset
772 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
773
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jlarmour
parents:
diff changeset
774 // Dispose of any dead threads
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jlarmour
parents:
diff changeset
775 pthread_reap();
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jlarmour
parents:
diff changeset
776
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jlarmour
parents:
diff changeset
777 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
778 pthread_info *joinee = pthread_info_id( thread );
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jlarmour
parents:
diff changeset
779
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jlarmour
parents:
diff changeset
780 if( joinee == NULL )
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parents:
diff changeset
781 {
152
f935b880e96c Merge from eCos master repository on 2001-02-14-01:27:14-GMT
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parents: 151
diff changeset
782 err = ESRCH;
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jlarmour
parents: 151
diff changeset
783 }
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jlarmour
parents: 151
diff changeset
784
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jlarmour
parents: 151
diff changeset
785 if( !err && joinee == self )
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jlarmour
parents: 151
diff changeset
786 {
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parents: 151
diff changeset
787 err = EDEADLK;
115
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jlarmour
parents:
diff changeset
788 }
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jlarmour
parents:
diff changeset
789
152
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jlarmour
parents: 151
diff changeset
790 if ( !err ) {
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jlarmour
parents: 151
diff changeset
791 switch ( joinee->state )
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parents: 151
diff changeset
792 {
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jlarmour
parents: 151
diff changeset
793 case PTHREAD_STATE_RUNNING:
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jlarmour
parents: 151
diff changeset
794 // The thread is still running, we must wait for it.
151
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parents: 148
diff changeset
795 while( joinee->state == PTHREAD_STATE_RUNNING ) {
152
f935b880e96c Merge from eCos master repository on 2001-02-14-01:27:14-GMT
jlarmour
parents: 151
diff changeset
796 if ( !joinee->joiner->wait() )
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jlarmour
parents: 151
diff changeset
797 // check if we were woken because we were being cancelled
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jlarmour
parents: 151
diff changeset
798 if ( checkforcancel() ) {
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jlarmour
parents: 151
diff changeset
799 err = EAGAIN; // value unimportant, just some error
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jlarmour
parents: 151
diff changeset
800 break;
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jlarmour
parents: 151
diff changeset
801 }
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
802 }
115
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jlarmour
parents:
diff changeset
803
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jlarmour
parents:
diff changeset
804 // check that the thread is still joinable
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jlarmour
parents:
diff changeset
805 if( joinee->state == PTHREAD_STATE_JOIN )
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jlarmour
parents:
diff changeset
806 break;
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jlarmour
parents:
diff changeset
807
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jlarmour
parents:
diff changeset
808 // 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
809 // fall through to complain.
152
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jlarmour
parents: 151
diff changeset
810
f935b880e96c Merge from eCos master repository on 2001-02-14-01:27:14-GMT
jlarmour
parents: 151
diff changeset
811 case PTHREAD_STATE_FREE:
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jlarmour
parents: 151
diff changeset
812 case PTHREAD_STATE_DETACHED:
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jlarmour
parents: 151
diff changeset
813 case PTHREAD_STATE_EXITED:
115
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jlarmour
parents:
diff changeset
814 // None of these may be joined.
152
f935b880e96c Merge from eCos master repository on 2001-02-14-01:27:14-GMT
jlarmour
parents: 151
diff changeset
815 err = EINVAL;
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jlarmour
parents: 151
diff changeset
816 break;
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jlarmour
parents: 151
diff changeset
817
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jlarmour
parents: 151
diff changeset
818 case PTHREAD_STATE_JOIN:
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jlarmour
parents: 151
diff changeset
819 break;
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jlarmour
parents: 151
diff changeset
820 }
115
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jlarmour
parents:
diff changeset
821 }
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jlarmour
parents:
diff changeset
822
152
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jlarmour
parents: 151
diff changeset
823 if ( !err ) {
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jlarmour
parents: 151
diff changeset
824
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jlarmour
parents: 151
diff changeset
825 // here, we know that joinee is a thread that has exited and is
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jlarmour
parents: 151
diff changeset
826 // ready to be joined.
115
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jlarmour
parents:
diff changeset
827
152
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jlarmour
parents: 151
diff changeset
828 // Get the retval
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jlarmour
parents: 151
diff changeset
829 if( thread_return != NULL )
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jlarmour
parents: 151
diff changeset
830 *thread_return = joinee->retval;
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jlarmour
parents: 151
diff changeset
831
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jlarmour
parents: 151
diff changeset
832 // set state to exited.
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jlarmour
parents: 151
diff changeset
833 joinee->state = PTHREAD_STATE_EXITED;
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jlarmour
parents: 151
diff changeset
834 pthreads_exited++;
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jlarmour
parents: 151
diff changeset
835 pthreads_tobejoined--;
115
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jlarmour
parents:
diff changeset
836
152
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jlarmour
parents: 151
diff changeset
837 // Dispose of any dead threads
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jlarmour
parents: 151
diff changeset
838 pthread_reap();
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jlarmour
parents: 151
diff changeset
839 }
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jlarmour
parents: 151
diff changeset
840
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jlarmour
parents: 151
diff changeset
841 pthread_mutex.unlock();
115
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jlarmour
parents:
diff changeset
842
152
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jlarmour
parents: 151
diff changeset
843 // check for cancellation before returning
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jlarmour
parents: 151
diff changeset
844 pthread_testcancel();
115
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jlarmour
parents:
diff changeset
845
152
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parents: 151
diff changeset
846 PTHREAD_RETURN(err);
115
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jlarmour
parents:
diff changeset
847 }
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jlarmour
parents:
diff changeset
848
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jlarmour
parents:
diff changeset
849 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
850 // 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
851 // 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
852
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jlarmour
parents:
diff changeset
853 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
854 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
855 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
856
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jlarmour
parents:
diff changeset
857 int ret = 0;
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jlarmour
parents:
diff changeset
858
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
859 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
860
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jlarmour
parents:
diff changeset
861 pthread_info *detachee = pthread_info_id( thread );
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jlarmour
parents:
diff changeset
862
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jlarmour
parents:
diff changeset
863 if( detachee == NULL )
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jlarmour
parents:
diff changeset
864 ret = ESRCH; // No such thread
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jlarmour
parents:
diff changeset
865 else if( detachee->state == PTHREAD_STATE_DETACHED )
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jlarmour
parents:
diff changeset
866 ret = EINVAL; // Already detached!
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jlarmour
parents:
diff changeset
867 else
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jlarmour
parents:
diff changeset
868 {
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jlarmour
parents:
diff changeset
869 // Set state to detached and kick any joinees to
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jlarmour
parents:
diff changeset
870 // make them return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
871 detachee->state = PTHREAD_STATE_DETACHED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
872 detachee->joiner->broadcast();
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jlarmour
parents:
diff changeset
873 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
874
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
875 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
876 pthread_reap();
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jlarmour
parents:
diff changeset
877
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
878 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
879
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
880 PTHREAD_RETURN(ret);
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jlarmour
parents:
diff changeset
881 }
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jlarmour
parents:
diff changeset
882
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
883
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
884 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
885 // Thread attribute handling.
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jlarmour
parents:
diff changeset
886
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
887 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
888 // Initialize attributes object with default attributes:
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jlarmour
parents:
diff changeset
889 // detachstate == PTHREAD_CREATE_JOINABLE
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jlarmour
parents:
diff changeset
890 // scope == PTHREAD_SCOPE_SYSTEM
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jlarmour
parents:
diff changeset
891 // inheritsched == PTHREAD_INHERIT_SCHED
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jlarmour
parents:
diff changeset
892 // schedpolicy == SCHED_OTHER
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jlarmour
parents:
diff changeset
893 // schedparam == unset
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jlarmour
parents:
diff changeset
894 // stackaddr == unset
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
895 // stacksize == 0
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jlarmour
parents:
diff changeset
896 //
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jlarmour
parents:
diff changeset
897
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jlarmour
parents:
diff changeset
898 externC int pthread_attr_init (pthread_attr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
899 {
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jlarmour
parents:
diff changeset
900 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
901
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
902 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
903
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
904 attr->detachstate = PTHREAD_CREATE_JOINABLE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
905 attr->scope = PTHREAD_SCOPE_SYSTEM;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
906 attr->inheritsched = PTHREAD_INHERIT_SCHED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
907 attr->schedpolicy = SCHED_OTHER;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
908 attr->schedparam.sched_priority = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
909 attr->stackaddr_valid = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
910 attr->stackaddr = NULL;
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jlarmour
parents:
diff changeset
911 attr->stacksize_valid = 0;
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jlarmour
parents:
diff changeset
912 attr->stacksize = 0;
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jlarmour
parents:
diff changeset
913
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
914 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
915 }
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jlarmour
parents:
diff changeset
916
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
917 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
918 // Destroy thread attributes object
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
919
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
920 externC int pthread_attr_destroy (pthread_attr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
921 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
922 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
923
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
924 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
925
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
926 // Nothing to do here...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
927
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
928 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
929 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
930
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
931 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
932 // Set the detachstate attribute
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jlarmour
parents:
diff changeset
933
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
934 externC int pthread_attr_setdetachstate (pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
935 int detachstate)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
936 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
937 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
938
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
939 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
940
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
941 if( detachstate == PTHREAD_CREATE_JOINABLE ||
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
942 detachstate == PTHREAD_CREATE_DETACHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
943 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
944 attr->detachstate = detachstate;
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jlarmour
parents:
diff changeset
945 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
946 }
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jlarmour
parents:
diff changeset
947
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
948 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
949 }
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jlarmour
parents:
diff changeset
950
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jlarmour
parents:
diff changeset
951 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
952 // Get the detachstate attribute
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jlarmour
parents:
diff changeset
953 externC int pthread_attr_getdetachstate (const pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
954 int *detachstate)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
955 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
956 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
957
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
958 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
959
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
960 if( detachstate != NULL )
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jlarmour
parents:
diff changeset
961 *detachstate = attr->detachstate;
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jlarmour
parents:
diff changeset
962
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
963 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
964 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
965
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
966 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
967 // Set scheduling contention scope
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jlarmour
parents:
diff changeset
968
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
969 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
970 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
971 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
972
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
973 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
974
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
975 if( scope == PTHREAD_SCOPE_SYSTEM ||
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jlarmour
parents:
diff changeset
976 scope == PTHREAD_SCOPE_PROCESS )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
977 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
978 if( scope == PTHREAD_SCOPE_PROCESS )
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jlarmour
parents:
diff changeset
979 PTHREAD_RETURN(ENOTSUP);
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jlarmour
parents:
diff changeset
980
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
981 attr->scope = 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);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
984 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
985
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
986 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
987 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
988
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
989 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
990 // Get scheduling contention scope
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jlarmour
parents:
diff changeset
991
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
992 externC int pthread_attr_getscope (const pthread_attr_t *attr, int *scope)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
993 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
994 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
995
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
996 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
997
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
998 if( scope != NULL )
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jlarmour
parents:
diff changeset
999 *scope = attr->scope;
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jlarmour
parents:
diff changeset
1000
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1001 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1002 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1003
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
parents:
diff changeset
1005 // Set scheduling inheritance attribute
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1006
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1007 externC int pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1008 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1009 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1010
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1011 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1012
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1013 if( inherit == PTHREAD_INHERIT_SCHED ||
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1014 inherit == PTHREAD_EXPLICIT_SCHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1015 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1016 attr->inheritsched = inherit;
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jlarmour
parents:
diff changeset
1017
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1018 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1019 }
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jlarmour
parents:
diff changeset
1020
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jlarmour
parents:
diff changeset
1021 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1022 }
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jlarmour
parents:
diff changeset
1023
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parents:
diff changeset
1024 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1025 // Get scheduling inheritance attribute
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parents:
diff changeset
1026
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parents:
diff changeset
1027 externC int pthread_attr_getinheritsched (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1028 int *inherit)
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jlarmour
parents:
diff changeset
1029 {
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parents:
diff changeset
1030 PTHREAD_ENTRY();
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parents:
diff changeset
1031
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parents:
diff changeset
1032 PTHREAD_CHECK(attr);
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parents:
diff changeset
1033
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diff changeset
1034 if( inherit != NULL )
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parents:
diff changeset
1035 *inherit = attr->inheritsched;
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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 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1041 // Set scheduling policy
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parents:
diff changeset
1042
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diff changeset
1043 externC int pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy)
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parents:
diff changeset
1044 {
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parents:
diff changeset
1045 PTHREAD_ENTRY();
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parents:
diff changeset
1046
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parents:
diff changeset
1047 PTHREAD_CHECK(attr);
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parents:
diff changeset
1048
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diff changeset
1049 if( policy == SCHED_OTHER ||
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jlarmour
parents:
diff changeset
1050 policy == SCHED_FIFO ||
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jlarmour
parents:
diff changeset
1051 policy == SCHED_RR )
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parents:
diff changeset
1052 {
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diff changeset
1053 attr->schedpolicy = policy;
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parents:
diff changeset
1054
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diff changeset
1055 PTHREAD_RETURN(0);
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parents:
diff changeset
1056 }
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diff changeset
1057
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diff changeset
1058 PTHREAD_RETURN(EINVAL);
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parents:
diff changeset
1059 }
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diff changeset
1060
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diff changeset
1061 //-----------------------------------------------------------------------------
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parents:
diff changeset
1062 // Get scheduling policy
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diff changeset
1063
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diff changeset
1064 externC int pthread_attr_getschedpolicy (const pthread_attr_t *attr,
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parents:
diff changeset
1065 int *policy)
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parents:
diff changeset
1066 {
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parents:
diff changeset
1067 PTHREAD_ENTRY();
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parents:
diff changeset
1068
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parents:
diff changeset
1069 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1070
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diff changeset
1071 if( policy != NULL )
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parents:
diff changeset
1072 *policy = attr->schedpolicy;
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parents:
diff changeset
1073
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parents:
diff changeset
1074 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1075 }
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diff changeset
1076
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parents:
diff changeset
1077 //-----------------------------------------------------------------------------
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parents:
diff changeset
1078 // Set scheduling parameters
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diff changeset
1079 externC int pthread_attr_setschedparam (pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1080 const struct sched_param *param)
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parents:
diff changeset
1081 {
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parents:
diff changeset
1082 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1083
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parents:
diff changeset
1084 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1085 PTHREAD_CHECK(param);
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jlarmour
parents:
diff changeset
1086
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parents:
diff changeset
1087 attr->schedparam = *param;
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parents:
diff changeset
1088
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parents:
diff changeset
1089 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1090 }
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diff changeset
1091
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parents:
diff changeset
1092 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1093 // Get scheduling parameters
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parents:
diff changeset
1094
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diff changeset
1095 externC int pthread_attr_getschedparam (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1096 struct sched_param *param)
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jlarmour
parents:
diff changeset
1097 {
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jlarmour
parents:
diff changeset
1098 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1099
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parents:
diff changeset
1100 PTHREAD_CHECK(attr);
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parents:
diff changeset
1101
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diff changeset
1102 if( param != NULL )
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parents:
diff changeset
1103 *param = attr->schedparam;
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jlarmour
parents:
diff changeset
1104
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diff changeset
1105 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1106 }
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parents:
diff changeset
1107
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parents:
diff changeset
1108 //-----------------------------------------------------------------------------
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jlarmour
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diff changeset
1109 // 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
jlarmour
parents:
diff changeset
1110 // the memory block allocated for the stack depends on whether the stack
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jlarmour
parents:
diff changeset
1111 // grows up or down.
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parents:
diff changeset
1112
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jlarmour
parents:
diff changeset
1113 externC int pthread_attr_setstackaddr (pthread_attr_t *attr, void *stackaddr)
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jlarmour
parents:
diff changeset
1114 {
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jlarmour
parents:
diff changeset
1115 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1116
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1117 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1118
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jlarmour
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diff changeset
1119 attr->stackaddr = stackaddr;
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jlarmour
parents:
diff changeset
1120 attr->stackaddr_valid = 1;
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jlarmour
parents:
diff changeset
1121
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jlarmour
parents:
diff changeset
1122 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1123 }
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diff changeset
1124
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parents:
diff changeset
1125 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1126 // Get any previously set stack address.
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jlarmour
parents:
diff changeset
1127
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parents:
diff changeset
1128 externC int pthread_attr_getstackaddr (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1129 void **stackaddr)
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jlarmour
parents:
diff changeset
1130 {
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jlarmour
parents:
diff changeset
1131 PTHREAD_ENTRY();
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parents:
diff changeset
1132
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jlarmour
parents:
diff changeset
1133 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1134
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diff changeset
1135 if( stackaddr != NULL )
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jlarmour
parents:
diff changeset
1136 {
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jlarmour
parents:
diff changeset
1137 if( attr->stackaddr_valid )
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jlarmour
parents:
diff changeset
1138 {
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diff changeset
1139 *stackaddr = attr->stackaddr;
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jlarmour
parents:
diff changeset
1140 PTHREAD_RETURN(0);
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parents:
diff changeset
1141 }
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diff changeset
1142 // Stack address not set, return EINVAL.
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diff changeset
1143 else PTHREAD_RETURN(EINVAL);
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parents:
diff changeset
1144 }
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diff changeset
1145
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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diff changeset
1146 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1147 }
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diff changeset
1148
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diff changeset
1149
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diff changeset
1150 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1151 // Set minimum creation stack size.
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jlarmour
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diff changeset
1152
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diff changeset
1153 externC int pthread_attr_setstacksize (pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1154 size_t stacksize)
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jlarmour
parents:
diff changeset
1155 {
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diff changeset
1156 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1157
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jlarmour
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diff changeset
1158 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1159
162
2395031e7a66 Merge from eCos master repository on 2001-06-15-06:43:03-BST
jlarmour
parents: 152
diff changeset
1160 CYG_ASSERT( stacksize >= PTHREAD_STACK_MIN, "Inadequate stack size supplied");
115
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jlarmour
parents:
diff changeset
1161
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jlarmour
parents:
diff changeset
1162 // Reject inadequate stack sizes
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jlarmour
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diff changeset
1163 if( stacksize < PTHREAD_STACK_MIN )
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jlarmour
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diff changeset
1164 PTHREAD_RETURN(EINVAL);
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diff changeset
1165
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diff changeset
1166 attr->stacksize_valid = 1;
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diff changeset
1167 attr->stacksize = stacksize;
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diff changeset
1168
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jlarmour
parents:
diff changeset
1169 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1170 }
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jlarmour
parents:
diff changeset
1171
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1172 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1173 // Get current minimal stack size.
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jlarmour
parents:
diff changeset
1174
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jlarmour
parents:
diff changeset
1175 externC int pthread_attr_getstacksize (const pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1176 size_t *stacksize)
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jlarmour
parents:
diff changeset
1177 {
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jlarmour
parents:
diff changeset
1178 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1179
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jlarmour
parents:
diff changeset
1180 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1181
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jlarmour
parents:
diff changeset
1182 // Reject attempts to get a stack size when one has not been set.
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jlarmour
parents:
diff changeset
1183 if( !attr->stacksize_valid )
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jlarmour
parents:
diff changeset
1184 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1185
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jlarmour
parents:
diff changeset
1186 if( stacksize != NULL )
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jlarmour
parents:
diff changeset
1187 *stacksize = attr->stacksize;
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jlarmour
parents:
diff changeset
1188
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jlarmour
parents:
diff changeset
1189 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1190 }
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jlarmour
parents:
diff changeset
1191
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jlarmour
parents:
diff changeset
1192 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1193 // Thread scheduling controls
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jlarmour
parents:
diff changeset
1194
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jlarmour
parents:
diff changeset
1195 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1196 // Set scheduling policy and parameters for the thread
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jlarmour
parents:
diff changeset
1197
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jlarmour
parents:
diff changeset
1198 externC int pthread_setschedparam (pthread_t thread_id,
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jlarmour
parents:
diff changeset
1199 int policy,
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jlarmour
parents:
diff changeset
1200 const struct sched_param *param)
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jlarmour
parents:
diff changeset
1201 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1202 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1203
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1204 if( policy != SCHED_OTHER &&
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jlarmour
parents:
diff changeset
1205 policy != SCHED_FIFO &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1206 policy != SCHED_RR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1207 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1208
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1209 PTHREAD_CHECK(param);
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jlarmour
parents:
diff changeset
1210
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1211 // The parameters seem OK, change the thread...
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jlarmour
parents:
diff changeset
1212
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1213 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1214
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1215 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1216
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1217 if( thread == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1218 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1219 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1220 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1221 }
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parents:
diff changeset
1222
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1223 thread->attr.schedpolicy = policy;
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jlarmour
parents:
diff changeset
1224 thread->attr.schedparam = *param;
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jlarmour
parents:
diff changeset
1225
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jlarmour
parents:
diff changeset
1226 if ( policy == SCHED_FIFO )
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jlarmour
parents:
diff changeset
1227 thread->thread->timeslice_disable();
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jlarmour
parents:
diff changeset
1228 else thread->thread->timeslice_enable();
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jlarmour
parents:
diff changeset
1229
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jlarmour
parents:
diff changeset
1230 thread->thread->set_priority( PTHREAD_ECOS_PRIORITY( param->sched_priority ));
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jlarmour
parents:
diff changeset
1231
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jlarmour
parents:
diff changeset
1232 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1233
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jlarmour
parents:
diff changeset
1234 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1235 }
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jlarmour
parents:
diff changeset
1236
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1237 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1238 // Get scheduling policy and parameters for the thread
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1239
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1240 externC int pthread_getschedparam (pthread_t thread_id,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1241 int *policy,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1242 struct sched_param *param)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1243 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1244 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1245
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1246 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1247
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1248 pthread_info *thread = pthread_info_id( thread_id );
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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 if( thread == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1251 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1252 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1253 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1254 }
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jlarmour
parents:
diff changeset
1255
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1256 if( policy != NULL )
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jlarmour
parents:
diff changeset
1257 *policy = thread->attr.schedpolicy;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1258
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1259 if( param != NULL )
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jlarmour
parents:
diff changeset
1260 *param = thread->attr.schedparam;
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jlarmour
parents:
diff changeset
1261
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1262 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1263
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1264 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1265 }
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jlarmour
parents:
diff changeset
1266
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1267
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1268 //=============================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1269 // Dynamic package initialization
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1270 // 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
1271
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1272 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
1273 void (*init_routine) (void))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1274 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1275 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1276
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1277 PTHREAD_CHECK( once_control );
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jlarmour
parents:
diff changeset
1278 PTHREAD_CHECK( init_routine );
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jlarmour
parents:
diff changeset
1279
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jlarmour
parents:
diff changeset
1280 pthread_once_t old;
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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 // 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
1283 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1284
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1285 old = *once_control;
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jlarmour
parents:
diff changeset
1286 *once_control = 1;
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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 pthread_mutex.unlock();
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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 // 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
1291 if( !old ) init_routine();
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jlarmour
parents:
diff changeset
1292
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1293 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1294 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1295
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1296
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1297 //=============================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1298 //Thread specific data
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 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1301 // 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
1302 // 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
1303 // 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
1304 // 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
1305
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1306 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
1307 void (*destructor) (void *))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1308 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1309 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1310
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1311 pthread_key_t k = -1;
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jlarmour
parents:
diff changeset
1312
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1313 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1314
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1315 // Find a key to allocate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1316 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
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jlarmour
parents:
diff changeset
1317 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1318 if( thread_key[i] != 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1319 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1320 // We have a table slot with space available
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jlarmour
parents:
diff changeset
1321
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1322 // Get index of ls set bit.
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jlarmour
parents:
diff changeset
1323 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
1324
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jlarmour
parents:
diff changeset
1325 // clear it
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jlarmour
parents:
diff changeset
1326 thread_key[i] &= ~(1<<k);
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jlarmour
parents:
diff changeset
1327
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jlarmour
parents:
diff changeset
1328 // Add index of word
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jlarmour
parents:
diff changeset
1329 k += i * KEY_MAP_TYPE_SIZE;
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jlarmour
parents:
diff changeset
1330
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jlarmour
parents:
diff changeset
1331 // Install destructor
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jlarmour
parents:
diff changeset
1332 key_destructor[k] = destructor;
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jlarmour
parents:
diff changeset
1333
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jlarmour
parents:
diff changeset
1334 // break out with key found
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jlarmour
parents:
diff changeset
1335 break;
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jlarmour
parents:
diff changeset
1336 }
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jlarmour
parents:
diff changeset
1337 }
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jlarmour
parents:
diff changeset
1338
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jlarmour
parents:
diff changeset
1339 if( k != -1 )
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jlarmour
parents:
diff changeset
1340 {
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jlarmour
parents:
diff changeset
1341 // plant a NULL in all the valid thread data slots for this
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jlarmour
parents:
diff changeset
1342 // key in case we are reusing a key we used before.
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jlarmour
parents:
diff changeset
1343
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jlarmour
parents:
diff changeset
1344 for( cyg_ucount32 i = 0; i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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jlarmour
parents:
diff changeset
1345 {
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jlarmour
parents:
diff changeset
1346 pthread_info *thread = thread_table[i];
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jlarmour
parents:
diff changeset
1347
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jlarmour
parents:
diff changeset
1348 if( thread != NULL && thread->thread_data != NULL )
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jlarmour
parents:
diff changeset
1349 thread->thread_data[k] = NULL;
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jlarmour
parents:
diff changeset
1350 }
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jlarmour
parents:
diff changeset
1351 }
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jlarmour
parents:
diff changeset
1352
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jlarmour
parents:
diff changeset
1353 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1354
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jlarmour
parents:
diff changeset
1355 if( k == -1 ) PTHREAD_RETURN(EAGAIN);
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jlarmour
parents:
diff changeset
1356
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jlarmour
parents:
diff changeset
1357 *key = k;
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jlarmour
parents:
diff changeset
1358
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jlarmour
parents:
diff changeset
1359 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1360 }
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jlarmour
parents:
diff changeset
1361
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1362 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1363 // Delete key.
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jlarmour
parents:
diff changeset
1364
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jlarmour
parents:
diff changeset
1365 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
1366 {
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jlarmour
parents:
diff changeset
1367 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1368
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jlarmour
parents:
diff changeset
1369 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1370
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jlarmour
parents:
diff changeset
1371 // Set the key bit to 1 to indicate it is free.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1372 thread_key[key/KEY_MAP_TYPE_SIZE] |= 1<<(key%(KEY_MAP_TYPE_SIZE));
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jlarmour
parents:
diff changeset
1373
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jlarmour
parents:
diff changeset
1374 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1375
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jlarmour
parents:
diff changeset
1376 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1377 }
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jlarmour
parents:
diff changeset
1378
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1379 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1380 // 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
1381 // by the key.
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jlarmour
parents:
diff changeset
1382
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jlarmour
parents:
diff changeset
1383 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
1384 {
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jlarmour
parents:
diff changeset
1385 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1386
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jlarmour
parents:
diff changeset
1387 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
1388 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1389
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jlarmour
parents:
diff changeset
1390 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1391
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jlarmour
parents:
diff changeset
1392 if( self->thread_data == NULL )
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jlarmour
parents:
diff changeset
1393 {
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jlarmour
parents:
diff changeset
1394 // Allocate the per-thread data table
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jlarmour
parents:
diff changeset
1395 self->thread_data =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1396 (void **)self->thread->increment_stack_limit(
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1397 PTHREAD_KEYS_MAX * sizeof(void *) );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1398
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1399 // Clear out all entries
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jlarmour
parents:
diff changeset
1400 for( int i = 0; i < PTHREAD_KEYS_MAX; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1401 self->thread_data[i] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1402 }
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jlarmour
parents:
diff changeset
1403
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1404 self->thread_data[key] = (void *)pointer;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1405
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jlarmour
parents:
diff changeset
1406 PTHREAD_RETURN(0);
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
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1409 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1410 // Retrieve 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
1411 // by the key.
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jlarmour
parents:
diff changeset
1412
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1413 externC void *pthread_getspecific (pthread_key_t key)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1414 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1415 void *val;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1416 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1417
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1418 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
1419 PTHREAD_RETURN(NULL);
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jlarmour
parents:
diff changeset
1420
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1421 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1422
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1423 if( self->thread_data == NULL )
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jlarmour
parents:
diff changeset
1424 val = NULL;
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jlarmour
parents:
diff changeset
1425 else val = self->thread_data[key];
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jlarmour
parents:
diff changeset
1426
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jlarmour
parents:
diff changeset
1427 PTHREAD_RETURN(val);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1428 }
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jlarmour
parents:
diff changeset
1429
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1430 //=============================================================================
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jlarmour
parents:
diff changeset
1431 // Thread Cancellation Functions
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jlarmour
parents:
diff changeset
1432
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1433 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1434 // 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
1435 // Returns old state in *oldstate.
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jlarmour
parents:
diff changeset
1436
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1437 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
1438 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1439 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1440
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1441 if( state != PTHREAD_CANCEL_ENABLE &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1442 state != PTHREAD_CANCEL_DISABLE )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1443 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1444
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1445 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1446
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1447 pthread_info *self = pthread_self_info();
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( oldstate != NULL ) *oldstate = self->cancelstate;
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jlarmour
parents:
diff changeset
1450
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1451 self->cancelstate = state;
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jlarmour
parents:
diff changeset
1452
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1453 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1454
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1455 // 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
1456 // 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
1457 // 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
1458 // 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
1459
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1460 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1461 }
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jlarmour
parents:
diff changeset
1462
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1463 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1464 // 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
1465 // Returns old type in *oldtype.
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jlarmour
parents:
diff changeset
1466
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jlarmour
parents:
diff changeset
1467 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
1468 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1469 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1470
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jlarmour
parents:
diff changeset
1471 if( type != PTHREAD_CANCEL_ASYNCHRONOUS &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1472 type != PTHREAD_CANCEL_DEFERRED )
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jlarmour
parents:
diff changeset
1473 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1474
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jlarmour
parents:
diff changeset
1475 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1476
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jlarmour
parents:
diff changeset
1477 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1478
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jlarmour
parents:
diff changeset
1479 if( oldtype != NULL ) *oldtype = self->canceltype;
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jlarmour
parents:
diff changeset
1480
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jlarmour
parents:
diff changeset
1481 self->canceltype = type;
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jlarmour
parents:
diff changeset
1482
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jlarmour
parents:
diff changeset
1483 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1484
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jlarmour
parents:
diff changeset
1485 // 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
1486 // cancellation to now be delivered. However the standard does not
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jlarmour
parents:
diff changeset
1487 // 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
1488 // nothing. In future we might call pthread_testcancel() here.
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jlarmour
parents:
diff changeset
1489
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jlarmour
parents:
diff changeset
1490 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1491 }
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jlarmour
parents:
diff changeset
1492
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1493 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1494 // Cancel the thread.
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jlarmour
parents:
diff changeset
1495
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jlarmour
parents:
diff changeset
1496 externC int pthread_cancel (pthread_t thread)
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jlarmour
parents:
diff changeset
1497 {
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jlarmour
parents:
diff changeset
1498 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1499
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jlarmour
parents:
diff changeset
1500 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1501
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jlarmour
parents:
diff changeset
1502 pthread_info *th = pthread_info_id(thread);
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jlarmour
parents:
diff changeset
1503
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1504 if( th == NULL )
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 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1507 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1508 }
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jlarmour
parents:
diff changeset
1509
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1510 th->cancelpending = true;
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jlarmour
parents:
diff changeset
1511
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
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parents: 148
diff changeset
1512 if ( th->cancelstate == PTHREAD_CANCEL_ENABLE )
115
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parents:
diff changeset
1513 {
151
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jlarmour
parents: 148
diff changeset
1514 if ( th->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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jlarmour
parents: 148
diff changeset
1515 {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1516 // If the thread has cancellation enabled, and it is in
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1517 // asynchronous mode, set the eCos thread's ASR pending to
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1518 // deal with it when the thread wakes up. We also release the
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1519 // thread out of any current wait to make it wake up.
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1520
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1521 th->thread->set_asr_pending();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1522 th->thread->release();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1523 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1524 else if ( th->canceltype == PTHREAD_CANCEL_DEFERRED )
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jlarmour
parents: 148
diff changeset
1525 {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1526 // If the thread has cancellation enabled, and it is in
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1527 // deferred mode, wake the thread up so that cancellation
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1528 // points can test for cancellation.
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jlarmour
parents: 148
diff changeset
1529 th->thread->release();
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jlarmour
parents: 148
diff changeset
1530 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1531 else
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jlarmour
parents: 148
diff changeset
1532 CYG_FAIL("Unknown cancellation type");
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1533 }
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1534
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1535 // Otherwise the thread has cancellation disabled, in which case
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1536 // it is up to the thread to enable cancellation
115
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jlarmour
parents:
diff changeset
1537
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jlarmour
parents:
diff changeset
1538 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1539
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1540
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jlarmour
parents:
diff changeset
1541 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1542 }
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jlarmour
parents:
diff changeset
1543
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1544 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1545 // Test for a pending cancellation for the current thread and terminate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1546 // the thread if there is one.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1547
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1548 externC void pthread_testcancel (void)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1549 {
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jlarmour
parents:
diff changeset
1550 PTHREAD_ENTRY_VOID();
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jlarmour
parents:
diff changeset
1551
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1552 if( checkforcancel() )
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1553 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1554 // If we have cancellation enabled, and there is a cancellation
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1555 // pending, then go ahead and do the deed.
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 // Exit now with special retval. pthread_exit() calls the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1558 // cancellation handlers implicitly.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1559 pthread_exit(PTHREAD_CANCELED);
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
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1562 PTHREAD_RETURN_VOID;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1563 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1564
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1565 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1566 // These two functions actually implement the cleanup push and pop functionality.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1567
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1568 externC void pthread_cleanup_push_inner (struct pthread_cleanup_buffer *buffer,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1569 void (*routine) (void *),
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1570 void *arg)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1571 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1572 PTHREAD_ENTRY();
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 pthread_info *self = pthread_self_info();
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 buffer->routine = routine;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1577 buffer->arg = arg;
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 buffer->prev = self->cancelbuffer;
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 self->cancelbuffer = buffer;
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 return;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1584 }
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 externC void pthread_cleanup_pop_inner (struct pthread_cleanup_buffer *buffer,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1587 int execute)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1588 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1589 PTHREAD_ENTRY();
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 pthread_info *self = pthread_self_info();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1592
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1593 CYG_ASSERT( self->cancelbuffer == buffer, "Stacking error in cleanup buffers");
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1594
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1595 if( self->cancelbuffer == buffer )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1596 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1597 // Remove the buffer from the stack
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1598 self->cancelbuffer = buffer->prev;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1599 }
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jlarmour
parents:
diff changeset
1600 else
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 // If the top of the stack is not the buffer we expect, do not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1603 // execute it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1604 execute = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1605 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1606
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
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1607 if( execute ) buffer->routine(buffer->arg);
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1608
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1609 return;
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1610 }
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1611
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1612
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1613 // -------------------------------------------------------------------------
147
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1614 // eCos-specific function to measure stack usage of the supplied thread
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1615
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1616 #ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT
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1617 externC size_t pthread_measure_stack_usage (pthread_t thread)
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1618 {
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1619 pthread_info *th = pthread_info_id(thread);
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1620
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1621 if ( NULL == th )
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1622 return (size_t)-1;
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1623
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1624 return (size_t)th->thread->measure_stack_usage();
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1625 }
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1626 #endif
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1627
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1628 // -------------------------------------------------------------------------
115
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1629 // EOF pthread.cxx