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annotate packages/compat/posix/current/src/pthread.cxx @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 999c4261716b
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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 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): nickg
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44 // Contributors: nickg, jlarmour
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45 // Date: 2000-03-27
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46 // Purpose: POSIX pthread implementation
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47 // Description: This file contains the implementation of the POSIX pthread
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48 // functions.
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49 //
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50 //
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //==========================================================================
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55
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56 #include <pkgconf/hal.h>
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57 #include <pkgconf/kernel.h>
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58 #include <pkgconf/posix.h>
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59 #include <pkgconf/isoinfra.h>
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60 #include <pkgconf/libc_startup.h>
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61
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62 #include <cyg/kernel/ktypes.h> // base kernel types
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63 #include <cyg/infra/cyg_trac.h> // tracing macros
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64 #include <cyg/infra/cyg_ass.h> // assertion macros
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65
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66 #include "pprivate.h" // POSIX private header
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67
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68 #include <stdlib.h> // malloc(), free()
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69
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70 #include <cyg/kernel/sched.hxx> // scheduler definitions
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71 #include <cyg/kernel/thread.hxx> // thread definitions
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72 #include <cyg/kernel/clock.hxx> // clock definitions
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73
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74 #include <cyg/kernel/sched.inl> // scheduler inlines
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75
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76 //-----------------------------------------------------------------------------
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77 // First check that the configuration contains the elements we need
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78
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79 #ifndef CYGPKG_KERNEL
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80 #error POSIX pthread need eCos kernel
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81 #endif
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82
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83 #ifndef CYGSEM_KERNEL_SCHED_MLQUEUE
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84 #error POSIX pthreads need MLQ scheduler
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85 #endif
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86
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87 #ifndef CYGSEM_KERNEL_SCHED_TIMESLICE
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88 #error POSIX pthreads need timeslicing
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89 #endif
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90
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91 #ifndef CYGVAR_KERNEL_THREADS_DATA
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92 #error POSIX pthreads need per-thread data
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93 #endif
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94
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95 //=============================================================================
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96 // Internal data structures
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97
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98 // Mutex for controlling access to shared data structures
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99 Cyg_Mutex pthread_mutex CYGBLD_POSIX_INIT;
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100
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101 // Array of pthread control structures. A pthread_t object is
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102 // "just" an index into this array.
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103 static pthread_info *thread_table[CYGNUM_POSIX_PTHREAD_THREADS_MAX];
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104
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105 // Count of number of threads in table.
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106 static int pthread_count = 0;
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107
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108 // Count of number of threads that have exited and not been reaped.
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109 static int pthreads_exited;
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110
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111 // Count of number of threads that are waiting to be joined
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112 static int pthreads_tobejoined;
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113
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114 // Per-thread key allocation. This key map has a 1 bit set for each
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115 // key that is free, zero if it is allocated.
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116 #define KEY_MAP_TYPE cyg_uint32
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117 #define KEY_MAP_TYPE_SIZE (sizeof(KEY_MAP_TYPE)*8) // in BITS!
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118 static KEY_MAP_TYPE thread_key[PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE];
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119 static void (*key_destructor[PTHREAD_KEYS_MAX]) (void *);
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120
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121 // Index of next pthread_info to allocate from thread_table array.
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122 static int thread_info_next = 0;
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123
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124 // This is used to make pthread_t values unique even when reusing
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125 // a table slot. This allows CYGNUM_POSIX_PTHREAD_THREADS_MAX to range
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126 // up to 1024.
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127 #define THREAD_ID_COOKIE_INC 0x00000400
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128 #define THREAD_ID_COOKIE_MASK (THREAD_ID_COOKIE_INC-1)
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129 static pthread_t thread_id_cookie = THREAD_ID_COOKIE_INC;
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130
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131 //-----------------------------------------------------------------------------
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132 // Main thread.
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133
162
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134 #define MAIN_DEFAULT_STACK_SIZE \
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135 (CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE < PTHREAD_STACK_MIN \
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136 ? PTHREAD_STACK_MIN : CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE)
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137
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138 static char main_stack[MAIN_DEFAULT_STACK_SIZE];
115
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139
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140 // Thread ID of main thread.
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141 static pthread_t main_thread;
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142
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143 //=============================================================================
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144 // Exported variables
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145
151
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146 int pthread_canceled_dummy_var; // pointed to by PTHREAD_CANCELED
115
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147
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148 //=============================================================================
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149 // Internal functions
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150
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151 //-----------------------------------------------------------------------------
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152 // Private version of pthread_self() that returns a pointer to our internal
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153 // control structure.
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154
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155 pthread_info *pthread_self_info(void)
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156 {
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157 Cyg_Thread *thread = Cyg_Thread::self();
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158
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159 CYG_CHECK_DATA_PTR(thread, "Illegal current thread");
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160
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161 pthread_info *info = (pthread_info *)thread->get_data(CYGNUM_KERNEL_THREADS_DATA_POSIX);
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162
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163 // CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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164
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165 return info;
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166 }
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167
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168 externC pthread_info *pthread_info_id( pthread_t id )
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169 {
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170 pthread_t index = id & THREAD_ID_COOKIE_MASK;
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171
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172 pthread_info *info = thread_table[index];
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173
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174 // Check for a valid entry
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175 if( info == NULL )
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176 return NULL;
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177
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178 // Check that this is a valid entry
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179 if ( info->state == PTHREAD_STATE_FREE ||
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180 info->state == PTHREAD_STATE_EXITED )
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181 return NULL;
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182
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183 // Check that the entry matches the id
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184 if( info->id != id ) return NULL;
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185
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186 // Return the pointer
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187 return info;
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188 }
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189
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190 //-----------------------------------------------------------------------------
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191 // new operator to allow us to invoke the Cyg_Thread constructor on the
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192 // pthread_info.thread_obj array.
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193
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194 inline void *operator new(size_t size, cyg_uint8 *ptr) { return (void *)ptr; };
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195
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196 //-----------------------------------------------------------------------------
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197 // Optional memory allocation functions for pthread stacks.
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198 // If there is an implementation of malloc() available, define pthread_malloc()
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199 // and pthread_free() to use it. Otherwise define them to do nothing.
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200 // In the future we may want to add configuration here to permit thread stacks
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201 // to be allocated in a nominated memory pool separate from the standard malloc()
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202 // pool. Hence the (currently redundant) encapsulation of these functions.
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203
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204 #if CYGINT_ISO_MALLOC
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205
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206 static __inline__ CYG_ADDRWORD pthread_malloc( CYG_ADDRWORD size )
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207 {
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208 return (CYG_ADDRWORD)malloc( size );
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209 }
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210
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211 static __inline__ void pthread_free( CYG_ADDRWORD m )
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212 {
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213 free( (void *)m );
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214 }
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215
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216 #define PTHREAD_MALLOC
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217
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218 #else
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219
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220 #define pthread_malloc(_x_) (0)
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221
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222 #define pthread_free(_x_)
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223
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224 #endif
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225
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226 //-----------------------------------------------------------------------------
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227 // pthread entry function.
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228 // does some housekeeping and then calls the user's start routine.
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229
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230 static void pthread_entry(CYG_ADDRWORD data)
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231 {
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232 pthread_info *self = (pthread_info *)data;
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233
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234 void *retval = self->start_routine(self->start_arg);
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235
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236 pthread_exit( retval );
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237 }
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238
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239 //-----------------------------------------------------------------------------
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240 // Main entry function.
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241 // This is set as the start_routine of the main thread. It invokes main()
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242 // and if it returns, shuts down the system.
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243
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244 externC void cyg_libc_invoke_main( void );
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245
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246 static void *call_main( void * )
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247 {
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248 cyg_libc_invoke_main();
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249 return NULL; // placate compiler
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250 }
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251
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252 //-----------------------------------------------------------------------------
151
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253 // Check whether there is a cancel pending and if so, whether
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254 // cancellations are enabled. We do it in this order to reduce the
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255 // number of tests in the common case - when no cancellations are
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256 // pending.
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257 // We make this inline so it can be called directly below for speed
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258
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259 static __inline__ int
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260 checkforcancel( void )
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261 {
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262 pthread_info *self = pthread_self_info();
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263
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264 if( self != NULL &&
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265 self->cancelpending &&
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266 self->cancelstate == PTHREAD_CANCEL_ENABLE )
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267 return 1;
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268 else
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269 return 0;
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270 }
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271
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272
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273 //-----------------------------------------------------------------------------
115
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274 // POSIX ASR
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275 // This is installed as the ASR for all POSIX threads.
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276
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277 static void posix_asr( CYG_ADDRWORD data )
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278 {
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279 pthread_info *self = (pthread_info *)data;
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280
191
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281 #ifdef CYGPKG_POSIX_TIMERS
115
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282 // Call into timer subsystem to deliver any pending
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283 // timer expirations.
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284 cyg_posix_timer_asr(self);
191
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285 #endif
115
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286
191
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287 #ifdef CYGPKG_POSIX_SIGNALS
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288 // Call signal subsystem to deliver any signals
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289 cyg_posix_signal_asr(self);
191
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290 #endif
115
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291
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292 // Check for cancellation
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293 if( self->cancelpending &&
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294 self->cancelstate == PTHREAD_CANCEL_ENABLE &&
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295 self->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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296 {
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297 // If we have a pending cancellation, cancellations are
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298 // enabled and we are in asynchronous mode, then we can do the
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299 // cancellation processing. Since pthread_exit() does
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300 // everything we need to do, we just call that here.
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301
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302 pthread_exit(PTHREAD_CANCELED);
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303 }
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304 }
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305
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306 //-----------------------------------------------------------------------------
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307 // The (Grim) Reaper.
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308 // This function is called to tidy up and dispose of any threads that have
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309 // exited. This work must be done from a thread other than the one exiting.
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310 // Note: this function _must_ be called with pthread_mutex locked.
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311
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312 static void pthread_reap()
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313 {
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314 int i;
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315
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316 // Loop over the thread table looking for exited threads. The
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317 // pthreads_exited counter springs us out of this once we have
128
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318 // found them all (and keeps us out if there are none to do).
115
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319
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320 for( i = 0; pthreads_exited && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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321 {
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322 pthread_info *thread = thread_table[i];
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323
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324 if( thread != NULL && thread->state == PTHREAD_STATE_EXITED )
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325 {
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326 // The thread has exited, so it is a candidate for being
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327 // reaped. We have to make sure that the eCos thread has
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328 // also reached EXITED state before we can tidy it up.
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329
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330 while( thread->thread->get_state() != Cyg_Thread::EXITED )
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331 {
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332 // The eCos thread has not yet exited. This is
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333 // probably because its priority is too low to allow
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334 // it to complete. We fix this here by raising its
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335 // priority to equal ours and then yielding. This
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336 // should eventually get it into exited state.
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337
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338 Cyg_Thread *self = Cyg_Thread::self();
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339
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340 // Set thread's priority to our current dispatching priority.
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341 thread->thread->set_priority( self->get_current_priority() );
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342
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343 // Yield, yield
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344 self->yield();
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345
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346 // and keep looping until he exits.
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347 }
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348
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349 // At this point we have a thread that we can reap.
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350
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351 // destroy the eCos thread
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352 thread->thread->~Cyg_Thread();
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353
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354 // destroy the joiner condvar
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355 thread->joiner->~Cyg_Condition_Variable();
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356
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357 #ifdef CYGPKG_POSIX_SIGNALS
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358 // Destroy signal handling fields
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359 cyg_posix_thread_sigdestroy( thread );
191
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360 #endif
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361
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362 // Free the stack if we allocated it
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363 if( thread->freestack )
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364 pthread_free( thread->stackmem );
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365
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366 // Finally, set the thread table entry to NULL so that it
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367 // may be reused.
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368 thread_table[i] = NULL;
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369
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370 pthread_count--;
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371 pthreads_exited--;
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372 }
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373 }
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374 }
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375
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376 //=============================================================================
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377 // Functions exported to rest of POSIX subsystem.
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378
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379 //-----------------------------------------------------------------------------
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380 // Create the main() thread.
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381
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382 externC void cyg_posix_pthread_start( void )
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383 {
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384
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385 // Initialize the per-thread data key map.
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386
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387 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
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388 {
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389 thread_key[i] = ~0;
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390 }
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391
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392 // Create the main thread
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393 pthread_attr_t attr;
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394 struct sched_param schedparam;
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395
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396 schedparam.sched_priority = CYGNUM_POSIX_MAIN_DEFAULT_PRIORITY;
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397
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398 pthread_attr_init( &attr );
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399 pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
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400 pthread_attr_setstackaddr( &attr, &main_stack[sizeof(main_stack)] );
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401 pthread_attr_setstacksize( &attr, sizeof(main_stack) );
115
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402 pthread_attr_setschedpolicy( &attr, SCHED_RR );
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403 pthread_attr_setschedparam( &attr, &schedparam );
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404
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405 pthread_create( &main_thread, &attr, call_main, NULL );
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406 }
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407
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408 #ifdef CYGPKG_POSIX_SIGNALS
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409 //-----------------------------------------------------------------------------
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410 // Look for a thread that can accept delivery of any of the signals in
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411 // the mask and release it from any wait it is in. Since this may be
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412 // called from a DSR, it cannot use any locks internally - any locking
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413 // should be done before the call.
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414
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415 externC void cyg_posix_pthread_release_thread( sigset_t *mask )
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416 {
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417 int i;
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418 int count = pthread_count;
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419
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420 // Loop over the thread table looking for a thread that has a
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421 // signal mask that does not mask all the signals in mask.
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422 // FIXME: find a more efficient way of doing this.
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423
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424 for( i = 0; count > 0 && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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425 {
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426 pthread_info *thread = thread_table[i];
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427
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428 if( (thread != NULL) &&
128
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429 (thread->state <= PTHREAD_STATE_RUNNING) &&
115
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430 ((*mask & ~thread->sigmask) != 0) )
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431 {
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432 // This thread can service at least one of the signals in
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433 // *mask. Knock it out of its wait and make its ASR pending.
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434
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435 thread->thread->set_asr_pending();
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436 thread->thread->release();
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437 break;
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438 }
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439
128
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440 // Decrement count for each valid thread we find.
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441 if( thread != NULL && thread->state != PTHREAD_STATE_FREE )
115
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442 count--;
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443 }
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444 }
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445 #endif
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446
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447 //=============================================================================
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448 // General thread operations
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449
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450 //-----------------------------------------------------------------------------
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451 // Thread creation and management.
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452
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453 // Create a thread.
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454 externC int pthread_create ( pthread_t *thread,
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455 const pthread_attr_t *attr,
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456 void *(*start_routine) (void *),
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457 void *arg)
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458 {
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459 PTHREAD_ENTRY();
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460
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461 PTHREAD_CHECK(thread);
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462 PTHREAD_CHECK(start_routine);
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463
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464 pthread_info *self = pthread_self_info();
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465
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466 pthread_attr_t use_attr;
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467
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468 // Set use_attr to the set of attributes we are going to
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469 // actually use. Either those passed in, or the default set.
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470
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471 if( attr == NULL )
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472 pthread_attr_init( &use_attr );
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473 else use_attr = *attr;
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474
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475 // Adjust the attributes to cope with the setting of inheritsched.
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476
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477 if( use_attr.inheritsched == PTHREAD_INHERIT_SCHED )
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478 {
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479 use_attr.schedpolicy = self->attr.schedpolicy;
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480 use_attr.schedparam = self->attr.schedparam;
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481 }
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482
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483 CYG_ADDRWORD stackbase, stacksize;
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484 cyg_bool freestack = false;
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485 CYG_ADDRWORD stackmem = 0;
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486
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487 // If the stack size is not valid, we can assume that it is at
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488 // least PTHREAD_STACK_MIN bytes.
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489
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490 if( use_attr.stacksize_valid )
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491 stacksize = use_attr.stacksize;
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492 else stacksize = PTHREAD_STACK_MIN;
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493
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494 if( use_attr.stackaddr_valid )
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495 {
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496 // Set up stack base and size from supplied arguments.
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497
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498 // Calculate stack base from address and size.
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499 // FIXME: Falling stack assumed in pthread_create().
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500 stackmem = stackbase = (CYG_ADDRWORD)use_attr.stackaddr-stacksize;
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501 }
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502 else
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503 {
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504 #ifdef PTHREAD_MALLOC
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505
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506 stackmem = stackbase = pthread_malloc( stacksize );
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507
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508 if( stackmem == 0 )
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509 PTHREAD_RETURN( EAGAIN );
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510
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511 freestack = true;
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512 #else
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513 PTHREAD_RETURN(EINVAL);
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514 #endif
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515
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516 }
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517
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518 // Get sole access to data structures
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519
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520 pthread_mutex.lock();
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521
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522 // Dispose of any dead threads
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523 pthread_reap();
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524
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525 // Find a free slot in the thread table
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526
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527 pthread_info *nthread;
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528 int thread_next = thread_info_next;
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529
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530 while( thread_table[thread_next] != NULL )
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531 {
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532 thread_next++;
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533 if( thread_next >= CYGNUM_POSIX_PTHREAD_THREADS_MAX )
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534 thread_next = 0;
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535
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536 // check for wrap, and return error if no slots left
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537 if( thread_next == thread_info_next )
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538 {
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539 pthread_mutex.unlock();
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540 if( freestack )
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541 pthread_free( stackmem );
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542 PTHREAD_RETURN(ENOMEM);
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543 }
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544 }
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545
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546 nthread = (pthread_info *)stackbase;
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547
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548 stackbase += sizeof(pthread_info);
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549 stacksize -= sizeof(pthread_info);
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550
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551 thread_table[thread_next] = nthread;
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552
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553 // Set new next index
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554 thread_info_next = thread_next;
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555
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556 // step the cookie
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557 thread_id_cookie += THREAD_ID_COOKIE_INC;
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558
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559 // Initialize the table entry
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560 nthread->state = use_attr.detachstate == PTHREAD_CREATE_JOINABLE ?
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561 PTHREAD_STATE_RUNNING : PTHREAD_STATE_DETACHED;
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562 nthread->id = thread_next+thread_id_cookie;
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563 nthread->attr = use_attr;
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564 nthread->retval = 0;
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565 nthread->start_routine = start_routine;
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566 nthread->start_arg = arg;
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567
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568 nthread->freestack = freestack;
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569 nthread->stackmem = stackmem;
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570
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571 nthread->cancelstate = PTHREAD_CANCEL_ENABLE;
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572 nthread->canceltype = PTHREAD_CANCEL_DEFERRED;
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573 nthread->cancelbuffer = NULL;
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574 nthread->cancelpending = false;
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575
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576 nthread->thread_data = NULL;
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577
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578 #ifdef CYGVAR_KERNEL_THREADS_NAME
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579 // generate a name for this thread
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580
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581 char *name = nthread->name;
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582 static char *name_template = "pthread.00000000";
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583 pthread_t id = nthread->id;
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584
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585 for( int i = 0; name_template[i]; i++ ) name[i] = name_template[i];
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586
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587 // dump the id, in hex into the name.
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588 for( int i = 15; i >= 8; i-- )
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589 {
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590 name[i] = "0123456789ABCDEF"[id&0xF];
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591 id >>= 4;
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592 }
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593
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594 #endif
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595
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596 // Initialize the joiner condition variable
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597
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598 nthread->joiner = new(nthread->joiner_obj) Cyg_Condition_Variable( pthread_mutex );
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599
191
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600 #ifdef CYGPKG_POSIX_SIGNALS
115
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601 // Initialize signal specific fields.
136
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602 cyg_posix_thread_siginit( nthread, self );
191
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603 #endif
115
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604
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605 // create the underlying eCos thread
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606
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607 nthread->thread = new(&nthread->thread_obj[0])
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608 Cyg_Thread ( PTHREAD_ECOS_PRIORITY(use_attr.schedparam.sched_priority),
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609 pthread_entry,
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diff changeset
610 (CYG_ADDRWORD)nthread,
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611 name,
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612 stackbase,
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613 stacksize);
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614
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615 // Put pointer to pthread_info into eCos thread's per-thread data.
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616 nthread->thread->set_data( CYGNUM_KERNEL_THREADS_DATA_POSIX, (CYG_ADDRWORD)nthread );
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617
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618 // Set timeslice enable according to scheduling policy.
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619 if( use_attr.schedpolicy == SCHED_FIFO )
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620 nthread->thread->timeslice_disable();
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621 else nthread->thread->timeslice_enable();
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622
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623 // set up ASR and data
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624 nthread->thread->set_asr( posix_asr, (CYG_ADDRWORD)nthread, NULL, NULL );
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625
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626 // return thread ID
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627 *thread = nthread->id;
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628
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629 pthread_count++;
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630
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631 pthread_mutex.unlock();
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632
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633 // finally, set the thread going
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634 nthread->thread->resume();
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635
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636 PTHREAD_RETURN(0);
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637 }
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638
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639 //-----------------------------------------------------------------------------
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640 // Get current thread id.
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641
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642 externC pthread_t pthread_self ( void )
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643 {
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644 PTHREAD_ENTRY();
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645
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646 pthread_info *info = pthread_self_info();
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647
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648 CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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649
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650 return info->id;
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651 }
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652
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653 //-----------------------------------------------------------------------------
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654 // Compare two thread identifiers.
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655
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656 externC int pthread_equal (pthread_t thread1, pthread_t thread2)
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657 {
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658 PTHREAD_ENTRY();
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659
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660 return thread1 == thread2;
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661 }
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662
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663 //-----------------------------------------------------------------------------
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664 // Terminate current thread.
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665
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666 externC void exit(int) CYGBLD_ATTRIB_NORET;
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667
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668 externC void pthread_exit (void *retval)
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669 {
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670 PTHREAD_ENTRY();
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671
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672 pthread_info *self = pthread_self_info();
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673
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674 // Call cancellation handlers. We eat up the buffers as we go in
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675 // case any of the routines calls pthread_exit() itself.
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676 while( self->cancelbuffer != NULL )
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677 {
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678 struct pthread_cleanup_buffer *buffer = self->cancelbuffer;
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679
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680 self->cancelbuffer = buffer->prev;
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681
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682 buffer->routine(buffer->arg);
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683 }
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684
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685 if( self->thread_data != NULL )
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686 {
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687 // Call per-thread key destructors.
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688 // The specification of this is that we must continue to call the
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689 // destructor functions until all the per-thread data values are NULL or
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690 // we have done it PTHREAD_DESTRUCTOR_ITERATIONS times.
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691
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692 cyg_bool destructors_called;
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693 int destructor_iterations = 0;
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694
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695 do
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696 {
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697 destructors_called = false;
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698
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699 for( cyg_ucount32 key = 0; key < PTHREAD_KEYS_MAX; key++ )
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700 {
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701 // Skip unallocated keys
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702 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
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703 continue;
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704
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705 // Skip NULL destructors
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706 if( key_destructor[key] == NULL ) continue;
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707
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diff changeset
708 // Skip NULL data values
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709 if( self->thread_data[key] == NULL ) continue;
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710
208
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711 // If it passes all that, call the destructor.
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712 // Note that NULLing the data value here is new
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713 // behaviour in the 2001 POSIX standard.
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714 {
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715 void* value = self->thread_data[key];
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716 self->thread_data[key] = NULL;
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717 key_destructor[key](value);
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718 }
115
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719
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diff changeset
720 // Record that we called a destructor
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
721 destructors_called = true;
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jlarmour
parents:
diff changeset
722 }
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jlarmour
parents:
diff changeset
723
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jlarmour
parents:
diff changeset
724 // Count the iteration
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jlarmour
parents:
diff changeset
725 destructor_iterations++;
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jlarmour
parents:
diff changeset
726
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jlarmour
parents:
diff changeset
727 } while( destructors_called &&
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jlarmour
parents:
diff changeset
728 (destructor_iterations <= PTHREAD_DESTRUCTOR_ITERATIONS));
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jlarmour
parents:
diff changeset
729
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jlarmour
parents:
diff changeset
730 }
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jlarmour
parents:
diff changeset
731
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jlarmour
parents:
diff changeset
732 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
733
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jlarmour
parents:
diff changeset
734 // Set the retval for any joiner
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jlarmour
parents:
diff changeset
735 self->retval = retval;
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jlarmour
parents:
diff changeset
736
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jlarmour
parents:
diff changeset
737 // If we are already detached, go to EXITED state, otherwise
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
738 // go into JOIN state.
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jlarmour
parents:
diff changeset
739
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jlarmour
parents:
diff changeset
740 if ( PTHREAD_STATE_DETACHED == self->state ) {
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jlarmour
parents:
diff changeset
741 self->state = PTHREAD_STATE_EXITED;
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jlarmour
parents:
diff changeset
742 pthreads_exited++;
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jlarmour
parents:
diff changeset
743 } else {
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jlarmour
parents:
diff changeset
744 self->state = PTHREAD_STATE_JOIN;
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jlarmour
parents:
diff changeset
745 pthreads_tobejoined++;
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jlarmour
parents:
diff changeset
746 }
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jlarmour
parents:
diff changeset
747
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jlarmour
parents:
diff changeset
748 // Kick any waiting joiners
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jlarmour
parents:
diff changeset
749 self->joiner->broadcast();
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jlarmour
parents:
diff changeset
750
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jlarmour
parents:
diff changeset
751 cyg_bool call_exit=false;
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jlarmour
parents:
diff changeset
752
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jlarmour
parents:
diff changeset
753 // if this is the last thread (other than threads waiting to be joined)
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jlarmour
parents:
diff changeset
754 // then we need to call exit() later
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jlarmour
parents:
diff changeset
755 if ( pthreads_exited + pthreads_tobejoined == pthread_count )
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jlarmour
parents:
diff changeset
756 call_exit=true;
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jlarmour
parents:
diff changeset
757
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jlarmour
parents:
diff changeset
758 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
759
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jlarmour
parents:
diff changeset
760 // Finally, call the exit function; this will not return.
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jlarmour
parents:
diff changeset
761 if ( call_exit )
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jlarmour
parents:
diff changeset
762 ::exit(0);
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jlarmour
parents:
diff changeset
763 else
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jlarmour
parents:
diff changeset
764 self->thread->exit();
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jlarmour
parents:
diff changeset
765
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jlarmour
parents:
diff changeset
766 // 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
767 // 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
768 // call to abort() here in case Cyg_Thread::exit() returns.
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jlarmour
parents:
diff changeset
769
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jlarmour
parents:
diff changeset
770 for(;;) continue;
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jlarmour
parents:
diff changeset
771 }
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jlarmour
parents:
diff changeset
772
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jlarmour
parents:
diff changeset
773 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
774 // Wait for the thread to terminate. If thread_return is not NULL then
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
775 // 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
776 // *thread_return.
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jlarmour
parents:
diff changeset
777
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jlarmour
parents:
diff changeset
778 externC int pthread_join (pthread_t thread, void **thread_return)
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jlarmour
parents:
diff changeset
779 {
152
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jlarmour
parents: 151
diff changeset
780 int err = 0;
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jlarmour
parents: 151
diff changeset
781
115
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jlarmour
parents:
diff changeset
782 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
783
151
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jlarmour
parents: 148
diff changeset
784 // check for cancellation first.
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jlarmour
parents: 148
diff changeset
785 pthread_testcancel();
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jlarmour
parents: 148
diff changeset
786
115
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jlarmour
parents:
diff changeset
787 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
788
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jlarmour
parents:
diff changeset
789 // Dispose of any dead threads
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jlarmour
parents:
diff changeset
790 pthread_reap();
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jlarmour
parents:
diff changeset
791
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jlarmour
parents:
diff changeset
792 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
793 pthread_info *joinee = pthread_info_id( thread );
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jlarmour
parents:
diff changeset
794
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jlarmour
parents:
diff changeset
795 if( joinee == NULL )
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jlarmour
parents:
diff changeset
796 {
152
f935b880e96c Merge from eCos master repository on 2001-02-14-01:27:14-GMT
jlarmour
parents: 151
diff changeset
797 err = ESRCH;
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jlarmour
parents: 151
diff changeset
798 }
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jlarmour
parents: 151
diff changeset
799
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jlarmour
parents: 151
diff changeset
800 if( !err && joinee == self )
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jlarmour
parents: 151
diff changeset
801 {
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parents: 151
diff changeset
802 err = EDEADLK;
115
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jlarmour
parents:
diff changeset
803 }
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jlarmour
parents:
diff changeset
804
152
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jlarmour
parents: 151
diff changeset
805 if ( !err ) {
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jlarmour
parents: 151
diff changeset
806 switch ( joinee->state )
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jlarmour
parents: 151
diff changeset
807 {
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jlarmour
parents: 151
diff changeset
808 case PTHREAD_STATE_RUNNING:
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jlarmour
parents: 151
diff changeset
809 // The thread is still running, we must wait for it.
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
810 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
811 if ( !joinee->joiner->wait() )
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jlarmour
parents: 151
diff changeset
812 // check if we were woken because we were being cancelled
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jlarmour
parents: 151
diff changeset
813 if ( checkforcancel() ) {
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jlarmour
parents: 151
diff changeset
814 err = EAGAIN; // value unimportant, just some error
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jlarmour
parents: 151
diff changeset
815 break;
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jlarmour
parents: 151
diff changeset
816 }
151
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jlarmour
parents: 148
diff changeset
817 }
115
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jlarmour
parents:
diff changeset
818
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jlarmour
parents:
diff changeset
819 // check that the thread is still joinable
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jlarmour
parents:
diff changeset
820 if( joinee->state == PTHREAD_STATE_JOIN )
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jlarmour
parents:
diff changeset
821 break;
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jlarmour
parents:
diff changeset
822
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
823 // 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
824 // fall through to complain.
152
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jlarmour
parents: 151
diff changeset
825
f935b880e96c Merge from eCos master repository on 2001-02-14-01:27:14-GMT
jlarmour
parents: 151
diff changeset
826 case PTHREAD_STATE_FREE:
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jlarmour
parents: 151
diff changeset
827 case PTHREAD_STATE_DETACHED:
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jlarmour
parents: 151
diff changeset
828 case PTHREAD_STATE_EXITED:
115
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jlarmour
parents:
diff changeset
829 // 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
830 err = EINVAL;
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jlarmour
parents: 151
diff changeset
831 break;
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jlarmour
parents: 151
diff changeset
832
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jlarmour
parents: 151
diff changeset
833 case PTHREAD_STATE_JOIN:
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jlarmour
parents: 151
diff changeset
834 break;
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jlarmour
parents: 151
diff changeset
835 }
115
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jlarmour
parents:
diff changeset
836 }
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jlarmour
parents:
diff changeset
837
152
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jlarmour
parents: 151
diff changeset
838 if ( !err ) {
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jlarmour
parents: 151
diff changeset
839
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jlarmour
parents: 151
diff changeset
840 // here, we know that joinee is a thread that has exited and is
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parents: 151
diff changeset
841 // ready to be joined.
115
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jlarmour
parents:
diff changeset
842
152
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jlarmour
parents: 151
diff changeset
843 // Get the retval
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jlarmour
parents: 151
diff changeset
844 if( thread_return != NULL )
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jlarmour
parents: 151
diff changeset
845 *thread_return = joinee->retval;
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jlarmour
parents: 151
diff changeset
846
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jlarmour
parents: 151
diff changeset
847 // set state to exited.
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jlarmour
parents: 151
diff changeset
848 joinee->state = PTHREAD_STATE_EXITED;
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jlarmour
parents: 151
diff changeset
849 pthreads_exited++;
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jlarmour
parents: 151
diff changeset
850 pthreads_tobejoined--;
115
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jlarmour
parents:
diff changeset
851
152
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jlarmour
parents: 151
diff changeset
852 // Dispose of any dead threads
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jlarmour
parents: 151
diff changeset
853 pthread_reap();
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jlarmour
parents: 151
diff changeset
854 }
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jlarmour
parents: 151
diff changeset
855
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jlarmour
parents: 151
diff changeset
856 pthread_mutex.unlock();
115
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jlarmour
parents:
diff changeset
857
152
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jlarmour
parents: 151
diff changeset
858 // check for cancellation before returning
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jlarmour
parents: 151
diff changeset
859 pthread_testcancel();
115
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jlarmour
parents:
diff changeset
860
152
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jlarmour
parents: 151
diff changeset
861 PTHREAD_RETURN(err);
115
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jlarmour
parents:
diff changeset
862 }
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jlarmour
parents:
diff changeset
863
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jlarmour
parents:
diff changeset
864 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
865 // 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
866 // need to be joined and its resources will be freed when it exits.
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jlarmour
parents:
diff changeset
867
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jlarmour
parents:
diff changeset
868 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
869 {
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jlarmour
parents:
diff changeset
870 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
871
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jlarmour
parents:
diff changeset
872 int ret = 0;
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jlarmour
parents:
diff changeset
873
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jlarmour
parents:
diff changeset
874 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
875
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jlarmour
parents:
diff changeset
876 pthread_info *detachee = pthread_info_id( thread );
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jlarmour
parents:
diff changeset
877
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jlarmour
parents:
diff changeset
878 if( detachee == NULL )
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jlarmour
parents:
diff changeset
879 ret = ESRCH; // No such thread
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jlarmour
parents:
diff changeset
880 else if( detachee->state == PTHREAD_STATE_DETACHED )
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jlarmour
parents:
diff changeset
881 ret = EINVAL; // Already detached!
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jlarmour
parents:
diff changeset
882 else
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jlarmour
parents:
diff changeset
883 {
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jlarmour
parents:
diff changeset
884 // Set state to detached and kick any joinees to
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jlarmour
parents:
diff changeset
885 // make them return.
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jlarmour
parents:
diff changeset
886 detachee->state = PTHREAD_STATE_DETACHED;
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jlarmour
parents:
diff changeset
887 detachee->joiner->broadcast();
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jlarmour
parents:
diff changeset
888 }
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jlarmour
parents:
diff changeset
889
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jlarmour
parents:
diff changeset
890 // Dispose of any dead threads
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jlarmour
parents:
diff changeset
891 pthread_reap();
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parents:
diff changeset
892
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jlarmour
parents:
diff changeset
893 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
894
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jlarmour
parents:
diff changeset
895 PTHREAD_RETURN(ret);
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jlarmour
parents:
diff changeset
896 }
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parents:
diff changeset
897
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jlarmour
parents:
diff changeset
898
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jlarmour
parents:
diff changeset
899 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
900 // Thread attribute handling.
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jlarmour
parents:
diff changeset
901
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parents:
diff changeset
902 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
903 // Initialize attributes object with default attributes:
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jlarmour
parents:
diff changeset
904 // detachstate == PTHREAD_CREATE_JOINABLE
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parents:
diff changeset
905 // scope == PTHREAD_SCOPE_SYSTEM
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jlarmour
parents:
diff changeset
906 // inheritsched == PTHREAD_INHERIT_SCHED
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jlarmour
parents:
diff changeset
907 // schedpolicy == SCHED_OTHER
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jlarmour
parents:
diff changeset
908 // schedparam == unset
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jlarmour
parents:
diff changeset
909 // stackaddr == unset
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jlarmour
parents:
diff changeset
910 // stacksize == 0
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jlarmour
parents:
diff changeset
911 //
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jlarmour
parents:
diff changeset
912
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jlarmour
parents:
diff changeset
913 externC int pthread_attr_init (pthread_attr_t *attr)
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jlarmour
parents:
diff changeset
914 {
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jlarmour
parents:
diff changeset
915 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
916
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jlarmour
parents:
diff changeset
917 PTHREAD_CHECK(attr);
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parents:
diff changeset
918
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parents:
diff changeset
919 attr->detachstate = PTHREAD_CREATE_JOINABLE;
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parents:
diff changeset
920 attr->scope = PTHREAD_SCOPE_SYSTEM;
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parents:
diff changeset
921 attr->inheritsched = PTHREAD_INHERIT_SCHED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
922 attr->schedpolicy = SCHED_OTHER;
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jlarmour
parents:
diff changeset
923 attr->schedparam.sched_priority = 0;
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parents:
diff changeset
924 attr->stackaddr_valid = 0;
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jlarmour
parents:
diff changeset
925 attr->stackaddr = NULL;
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jlarmour
parents:
diff changeset
926 attr->stacksize_valid = 0;
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jlarmour
parents:
diff changeset
927 attr->stacksize = 0;
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parents:
diff changeset
928
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parents:
diff changeset
929 PTHREAD_RETURN(0);
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parents:
diff changeset
930 }
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parents:
diff changeset
931
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jlarmour
parents:
diff changeset
932 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
933 // Destroy thread attributes object
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jlarmour
parents:
diff changeset
934
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jlarmour
parents:
diff changeset
935 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
936 {
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jlarmour
parents:
diff changeset
937 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
938
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jlarmour
parents:
diff changeset
939 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
940
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jlarmour
parents:
diff changeset
941 // Nothing to do here...
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jlarmour
parents:
diff changeset
942
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jlarmour
parents:
diff changeset
943 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
944 }
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jlarmour
parents:
diff changeset
945
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 // Set the detachstate attribute
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jlarmour
parents:
diff changeset
948
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
949 externC int pthread_attr_setdetachstate (pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
950 int detachstate)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
951 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
952 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
953
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jlarmour
parents:
diff changeset
954 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
955
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jlarmour
parents:
diff changeset
956 if( detachstate == PTHREAD_CREATE_JOINABLE ||
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jlarmour
parents:
diff changeset
957 detachstate == PTHREAD_CREATE_DETACHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
958 {
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jlarmour
parents:
diff changeset
959 attr->detachstate = detachstate;
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jlarmour
parents:
diff changeset
960 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
961 }
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jlarmour
parents:
diff changeset
962
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jlarmour
parents:
diff changeset
963 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
964 }
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jlarmour
parents:
diff changeset
965
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jlarmour
parents:
diff changeset
966 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
967 // Get the detachstate attribute
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jlarmour
parents:
diff changeset
968 externC int pthread_attr_getdetachstate (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
969 int *detachstate)
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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();
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jlarmour
parents:
diff changeset
972
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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( detachstate != NULL )
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jlarmour
parents:
diff changeset
976 *detachstate = attr->detachstate;
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jlarmour
parents:
diff changeset
977
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
978 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
979 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
980
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
981 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
982 // Set scheduling contention scope
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jlarmour
parents:
diff changeset
983
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
984 externC int pthread_attr_setscope (pthread_attr_t *attr, int scope)
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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_ENTRY();
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 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
989
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
990 if( scope == PTHREAD_SCOPE_SYSTEM ||
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jlarmour
parents:
diff changeset
991 scope == PTHREAD_SCOPE_PROCESS )
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jlarmour
parents:
diff changeset
992 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
993 if( scope == PTHREAD_SCOPE_PROCESS )
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jlarmour
parents:
diff changeset
994 PTHREAD_RETURN(ENOTSUP);
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jlarmour
parents:
diff changeset
995
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
996 attr->scope = scope;
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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 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
999 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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(EINVAL);
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 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1005 // Get scheduling contention scope
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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_getscope (const pthread_attr_t *attr, int *scope)
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jlarmour
parents:
diff changeset
1008 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1009 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
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diff changeset
1013 if( scope != NULL )
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jlarmour
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diff changeset
1014 *scope = attr->scope;
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jlarmour
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diff changeset
1015
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jlarmour
parents:
diff changeset
1016 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1017 }
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parents:
diff changeset
1018
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jlarmour
parents:
diff changeset
1019 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1020 // Set scheduling inheritance attribute
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parents:
diff changeset
1021
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jlarmour
parents:
diff changeset
1022 externC int pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit)
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jlarmour
parents:
diff changeset
1023 {
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parents:
diff changeset
1024 PTHREAD_ENTRY();
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parents:
diff changeset
1025
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jlarmour
parents:
diff changeset
1026 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1027
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diff changeset
1028 if( inherit == PTHREAD_INHERIT_SCHED ||
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jlarmour
parents:
diff changeset
1029 inherit == PTHREAD_EXPLICIT_SCHED )
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parents:
diff changeset
1030 {
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parents:
diff changeset
1031 attr->inheritsched = inherit;
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parents:
diff changeset
1032
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jlarmour
parents:
diff changeset
1033 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1034 }
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jlarmour
parents:
diff changeset
1035
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parents:
diff changeset
1036 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1037 }
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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 // Get scheduling inheritance attribute
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parents:
diff changeset
1041
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parents:
diff changeset
1042 externC int pthread_attr_getinheritsched (const pthread_attr_t *attr,
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parents:
diff changeset
1043 int *inherit)
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parents:
diff changeset
1044 {
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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( inherit != NULL )
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diff changeset
1050 *inherit = attr->inheritsched;
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diff changeset
1051
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diff changeset
1052 PTHREAD_RETURN(0);
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parents:
diff changeset
1053 }
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diff changeset
1054
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diff changeset
1055 //-----------------------------------------------------------------------------
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parents:
diff changeset
1056 // Set scheduling policy
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parents:
diff changeset
1057
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diff changeset
1058 externC int pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy)
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parents:
diff changeset
1059 {
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parents:
diff changeset
1060 PTHREAD_ENTRY();
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parents:
diff changeset
1061
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parents:
diff changeset
1062 PTHREAD_CHECK(attr);
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parents:
diff changeset
1063
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diff changeset
1064 if( policy == SCHED_OTHER ||
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parents:
diff changeset
1065 policy == SCHED_FIFO ||
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jlarmour
parents:
diff changeset
1066 policy == SCHED_RR )
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parents:
diff changeset
1067 {
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parents:
diff changeset
1068 attr->schedpolicy = policy;
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parents:
diff changeset
1069
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diff changeset
1070 PTHREAD_RETURN(0);
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parents:
diff changeset
1071 }
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parents:
diff changeset
1072
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parents:
diff changeset
1073 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1074 }
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parents:
diff changeset
1075
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parents:
diff changeset
1076 //-----------------------------------------------------------------------------
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parents:
diff changeset
1077 // Get scheduling policy
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parents:
diff changeset
1078
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diff changeset
1079 externC int pthread_attr_getschedpolicy (const pthread_attr_t *attr,
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diff changeset
1080 int *policy)
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parents:
diff changeset
1081 {
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parents:
diff changeset
1082 PTHREAD_ENTRY();
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parents:
diff changeset
1083
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parents:
diff changeset
1084 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1085
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diff changeset
1086 if( policy != NULL )
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parents:
diff changeset
1087 *policy = attr->schedpolicy;
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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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parents:
diff changeset
1093 // Set scheduling parameters
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parents:
diff changeset
1094 externC int pthread_attr_setschedparam (pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1095 const struct sched_param *param)
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jlarmour
parents:
diff changeset
1096 {
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jlarmour
parents:
diff changeset
1097 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1098
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jlarmour
parents:
diff changeset
1099 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1100 PTHREAD_CHECK(param);
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jlarmour
parents:
diff changeset
1101
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jlarmour
parents:
diff changeset
1102 attr->schedparam = *param;
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jlarmour
parents:
diff changeset
1103
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jlarmour
parents:
diff changeset
1104 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1105 }
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parents:
diff changeset
1106
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parents:
diff changeset
1107 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1108 // Get scheduling parameters
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jlarmour
parents:
diff changeset
1109
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parents:
diff changeset
1110 externC int pthread_attr_getschedparam (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1111 struct sched_param *param)
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jlarmour
parents:
diff changeset
1112 {
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jlarmour
parents:
diff changeset
1113 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1114
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jlarmour
parents:
diff changeset
1115 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1116
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jlarmour
parents:
diff changeset
1117 if( param != NULL )
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jlarmour
parents:
diff changeset
1118 *param = attr->schedparam;
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jlarmour
parents:
diff changeset
1119
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jlarmour
parents:
diff changeset
1120 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1121 }
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diff changeset
1122
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parents:
diff changeset
1123 //-----------------------------------------------------------------------------
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diff changeset
1124 // 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
1125 // the memory block allocated for the stack depends on whether the stack
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1126 // grows up or down.
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parents:
diff changeset
1127
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parents:
diff changeset
1128 externC int pthread_attr_setstackaddr (pthread_attr_t *attr, void *stackaddr)
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jlarmour
parents:
diff changeset
1129 {
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jlarmour
parents:
diff changeset
1130 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1131
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1132 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1133
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diff changeset
1134 attr->stackaddr = stackaddr;
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jlarmour
parents:
diff changeset
1135 attr->stackaddr_valid = 1;
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diff changeset
1136
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parents:
diff changeset
1137 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1138 }
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diff changeset
1139
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diff changeset
1140 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1141 // Get any previously set stack address.
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diff changeset
1142
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diff changeset
1143 externC int pthread_attr_getstackaddr (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1144 void **stackaddr)
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jlarmour
parents:
diff changeset
1145 {
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diff changeset
1146 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1147
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1148 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1149
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diff changeset
1150 if( stackaddr != NULL )
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jlarmour
parents:
diff changeset
1151 {
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jlarmour
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diff changeset
1152 if( attr->stackaddr_valid )
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jlarmour
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diff changeset
1153 {
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diff changeset
1154 *stackaddr = attr->stackaddr;
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jlarmour
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diff changeset
1155 PTHREAD_RETURN(0);
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parents:
diff changeset
1156 }
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diff changeset
1157 // Stack address not set, return EINVAL.
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jlarmour
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diff changeset
1158 else PTHREAD_RETURN(EINVAL);
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diff changeset
1159 }
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diff changeset
1160
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diff changeset
1161 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1162 }
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diff changeset
1163
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jlarmour
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diff changeset
1164
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jlarmour
parents:
diff changeset
1165 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1166 // Set minimum creation stack size.
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jlarmour
parents:
diff changeset
1167
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jlarmour
parents:
diff changeset
1168 externC int pthread_attr_setstacksize (pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1169 size_t stacksize)
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jlarmour
parents:
diff changeset
1170 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1171 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1172
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jlarmour
parents:
diff changeset
1173 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1174
162
2395031e7a66 Merge from eCos master repository on 2001-06-15-06:43:03-BST
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parents: 152
diff changeset
1175 CYG_ASSERT( stacksize >= PTHREAD_STACK_MIN, "Inadequate stack size supplied");
115
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jlarmour
parents:
diff changeset
1176
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1177 // Reject inadequate stack sizes
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1178 if( stacksize < PTHREAD_STACK_MIN )
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jlarmour
parents:
diff changeset
1179 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1180
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1181 attr->stacksize_valid = 1;
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jlarmour
parents:
diff changeset
1182 attr->stacksize = stacksize;
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jlarmour
parents:
diff changeset
1183
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1184 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1185 }
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jlarmour
parents:
diff changeset
1186
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1187 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1188 // Get current minimal stack size.
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jlarmour
parents:
diff changeset
1189
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jlarmour
parents:
diff changeset
1190 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
1191 size_t *stacksize)
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jlarmour
parents:
diff changeset
1192 {
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jlarmour
parents:
diff changeset
1193 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1194
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jlarmour
parents:
diff changeset
1195 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1196
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jlarmour
parents:
diff changeset
1197 // Reject attempts to get a stack size when one has not been set.
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jlarmour
parents:
diff changeset
1198 if( !attr->stacksize_valid )
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jlarmour
parents:
diff changeset
1199 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1200
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jlarmour
parents:
diff changeset
1201 if( stacksize != NULL )
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jlarmour
parents:
diff changeset
1202 *stacksize = attr->stacksize;
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jlarmour
parents:
diff changeset
1203
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1204 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1205 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1206
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1207 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1208 // Thread scheduling controls
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jlarmour
parents:
diff changeset
1209
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1210 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1211 // Set scheduling policy and parameters for 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 externC int pthread_setschedparam (pthread_t thread_id,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1214 int policy,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1215 const struct sched_param *param)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1216 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1217 PTHREAD_ENTRY();
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 if( policy != SCHED_OTHER &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1220 policy != SCHED_FIFO &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1221 policy != SCHED_RR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1222 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1223
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1224 PTHREAD_CHECK(param);
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jlarmour
parents:
diff changeset
1225
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1226 // The parameters seem OK, change the thread...
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jlarmour
parents:
diff changeset
1227
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1228 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1229
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1230 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1231
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jlarmour
parents:
diff changeset
1232 if( thread == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1233 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1234 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1235 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1236 }
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jlarmour
parents:
diff changeset
1237
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1238 thread->attr.schedpolicy = policy;
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jlarmour
parents:
diff changeset
1239 thread->attr.schedparam = *param;
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jlarmour
parents:
diff changeset
1240
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1241 if ( policy == SCHED_FIFO )
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jlarmour
parents:
diff changeset
1242 thread->thread->timeslice_disable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1243 else thread->thread->timeslice_enable();
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jlarmour
parents:
diff changeset
1244
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jlarmour
parents:
diff changeset
1245 thread->thread->set_priority( PTHREAD_ECOS_PRIORITY( param->sched_priority ));
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jlarmour
parents:
diff changeset
1246
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1247 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1248
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1249 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1250 }
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jlarmour
parents:
diff changeset
1251
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1252 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1253 // 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
1254
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1255 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
1256 int *policy,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1257 struct sched_param *param)
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 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1260
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1261 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1262
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1263 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1264
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1265 if( thread == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1266 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1267 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1268 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1269 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1270
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1271 if( policy != NULL )
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jlarmour
parents:
diff changeset
1272 *policy = thread->attr.schedpolicy;
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jlarmour
parents:
diff changeset
1273
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1274 if( param != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1275 *param = thread->attr.schedparam;
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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_mutex.unlock();
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jlarmour
parents:
diff changeset
1278
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1279 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1280 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1281
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1282
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1283 //=============================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1284 // Dynamic package initialization
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1285 // 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
1286
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1287 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
1288 void (*init_routine) (void))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1289 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1290 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1291
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1292 PTHREAD_CHECK( once_control );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1293 PTHREAD_CHECK( init_routine );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1294
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1295 pthread_once_t old;
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 // 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
1298 pthread_mutex.lock();
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 old = *once_control;
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jlarmour
parents:
diff changeset
1301 *once_control = 1;
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jlarmour
parents:
diff changeset
1302
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1303 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1304
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1305 // 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
1306 if( !old ) init_routine();
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jlarmour
parents:
diff changeset
1307
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1308 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1309 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1310
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1311
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1312 //=============================================================================
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jlarmour
parents:
diff changeset
1313 //Thread specific data
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 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1316 // 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
1317 // 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
1318 // 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
1319 // 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
1320
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jlarmour
parents:
diff changeset
1321 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
1322 void (*destructor) (void *))
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jlarmour
parents:
diff changeset
1323 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1324 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1325
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jlarmour
parents:
diff changeset
1326 pthread_key_t k = -1;
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jlarmour
parents:
diff changeset
1327
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jlarmour
parents:
diff changeset
1328 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1329
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jlarmour
parents:
diff changeset
1330 // Find a key to allocate
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jlarmour
parents:
diff changeset
1331 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
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jlarmour
parents:
diff changeset
1332 {
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jlarmour
parents:
diff changeset
1333 if( thread_key[i] != 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1334 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1335 // We have a table slot with space available
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jlarmour
parents:
diff changeset
1336
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1337 // Get index of ls set bit.
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jlarmour
parents:
diff changeset
1338 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
1339
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1340 // clear it
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jlarmour
parents:
diff changeset
1341 thread_key[i] &= ~(1<<k);
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jlarmour
parents:
diff changeset
1342
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jlarmour
parents:
diff changeset
1343 // Add index of word
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jlarmour
parents:
diff changeset
1344 k += i * KEY_MAP_TYPE_SIZE;
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jlarmour
parents:
diff changeset
1345
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1346 // Install destructor
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jlarmour
parents:
diff changeset
1347 key_destructor[k] = destructor;
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jlarmour
parents:
diff changeset
1348
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jlarmour
parents:
diff changeset
1349 // break out with key found
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jlarmour
parents:
diff changeset
1350 break;
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jlarmour
parents:
diff changeset
1351 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1352 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1353
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1354 if( k != -1 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1355 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1356 // plant a NULL in all the valid thread data slots for this
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1357 // key in case we are reusing a key we used before.
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jlarmour
parents:
diff changeset
1358
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jlarmour
parents:
diff changeset
1359 for( cyg_ucount32 i = 0; i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1360 {
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jlarmour
parents:
diff changeset
1361 pthread_info *thread = thread_table[i];
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jlarmour
parents:
diff changeset
1362
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jlarmour
parents:
diff changeset
1363 if( thread != NULL && thread->thread_data != NULL )
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jlarmour
parents:
diff changeset
1364 thread->thread_data[k] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1365 }
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
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jlarmour
parents:
diff changeset
1368 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1369
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jlarmour
parents:
diff changeset
1370 if( k == -1 ) PTHREAD_RETURN(EAGAIN);
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jlarmour
parents:
diff changeset
1371
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jlarmour
parents:
diff changeset
1372 *key = k;
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jlarmour
parents:
diff changeset
1373
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jlarmour
parents:
diff changeset
1374 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1375 }
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jlarmour
parents:
diff changeset
1376
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1377 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1378 // Delete key.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1379
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1380 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
1381 {
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jlarmour
parents:
diff changeset
1382 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1383
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jlarmour
parents:
diff changeset
1384 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1385
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1386 // 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
1387 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
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jlarmour
parents:
diff changeset
1389 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1390
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jlarmour
parents:
diff changeset
1391 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1392 }
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jlarmour
parents:
diff changeset
1393
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1394 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1395 // 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
1396 // by the key.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1397
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1398 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
1399 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1400 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1401
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jlarmour
parents:
diff changeset
1402 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
1403 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1404
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jlarmour
parents:
diff changeset
1405 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1406
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jlarmour
parents:
diff changeset
1407 if( self->thread_data == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1408 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1409 // Allocate the per-thread data table
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1410 self->thread_data =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1411 (void **)self->thread->increment_stack_limit(
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1412 PTHREAD_KEYS_MAX * sizeof(void *) );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1413
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1414 // Clear out all entries
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1415 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
1416 self->thread_data[i] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1417 }
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jlarmour
parents:
diff changeset
1418
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1419 self->thread_data[key] = (void *)pointer;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1422 }
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jlarmour
parents:
diff changeset
1423
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1424 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1425 // 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
1426 // by the key.
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jlarmour
parents:
diff changeset
1427
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1428 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
1429 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1430 void *val;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1431 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1432
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1433 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
1434 PTHREAD_RETURN(NULL);
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jlarmour
parents:
diff changeset
1435
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1436 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1437
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1438 if( self->thread_data == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1439 val = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1440 else val = self->thread_data[key];
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jlarmour
parents:
diff changeset
1441
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1442 PTHREAD_RETURN(val);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1443 }
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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 //=============================================================================
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jlarmour
parents:
diff changeset
1446 // Thread Cancellation Functions
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jlarmour
parents:
diff changeset
1447
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 // 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
1450 // Returns old state in *oldstate.
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jlarmour
parents:
diff changeset
1451
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1452 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
1453 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1454 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1455
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1456 if( state != PTHREAD_CANCEL_ENABLE &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1457 state != PTHREAD_CANCEL_DISABLE )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1458 PTHREAD_RETURN(EINVAL);
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_mutex.lock();
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jlarmour
parents:
diff changeset
1461
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1462 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1463
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jlarmour
parents:
diff changeset
1464 if( oldstate != NULL ) *oldstate = self->cancelstate;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1465
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1466 self->cancelstate = state;
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jlarmour
parents:
diff changeset
1467
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1468 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1469
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1470 // 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
1471 // 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
1472 // 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
1473 // nothing. In future we might call pthread_testcancel() here.
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jlarmour
parents:
diff changeset
1474
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jlarmour
parents:
diff changeset
1475 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1476 }
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jlarmour
parents:
diff changeset
1477
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1478 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1479 // 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
1480 // Returns old type in *oldtype.
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jlarmour
parents:
diff changeset
1481
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jlarmour
parents:
diff changeset
1482 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
1483 {
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jlarmour
parents:
diff changeset
1484 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1485
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jlarmour
parents:
diff changeset
1486 if( type != PTHREAD_CANCEL_ASYNCHRONOUS &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1487 type != PTHREAD_CANCEL_DEFERRED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1488 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1489
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jlarmour
parents:
diff changeset
1490 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1491
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1492 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1493
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1494 if( oldtype != NULL ) *oldtype = self->canceltype;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1495
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1496 self->canceltype = type;
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jlarmour
parents:
diff changeset
1497
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1498 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1499
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1500 // 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
1501 // 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
1502 // 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
1503 // 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
1504
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1505 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1506 }
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jlarmour
parents:
diff changeset
1507
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 // Cancel the thread.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1510
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1511 externC int pthread_cancel (pthread_t thread)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1512 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1513 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1514
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1515 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1516
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1517 pthread_info *th = pthread_info_id(thread);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1518
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1519 if( th == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1520 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1521 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1522 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1523 }
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jlarmour
parents:
diff changeset
1524
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1525 th->cancelpending = true;
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jlarmour
parents:
diff changeset
1526
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1527 if ( th->cancelstate == PTHREAD_CANCEL_ENABLE )
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1528 {
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1529 if ( th->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
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 // 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
1532 // 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
1533 // 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
1534 // 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
1535
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1536 th->thread->set_asr_pending();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1537 th->thread->release();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1538 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1539 else if ( th->canceltype == PTHREAD_CANCEL_DEFERRED )
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1540 {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1541 // 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
1542 // 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
1543 // points can test for cancellation.
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1544 th->thread->release();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1545 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1546 else
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1547 CYG_FAIL("Unknown cancellation type");
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1548 }
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1549
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1550 // 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
1551 // it is up to the thread to enable cancellation
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1552
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1553 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1554
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1555
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1556 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1557 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1558
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1559 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1560 // 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
1561 // the thread if there is one.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1562
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1563 externC void pthread_testcancel (void)
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 PTHREAD_ENTRY_VOID();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1566
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 148
diff changeset
1567 if( checkforcancel() )
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1568 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1569 // 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
1570 // 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
1571
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1572 // 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
1573 // cancellation handlers implicitly.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1574 pthread_exit(PTHREAD_CANCELED);
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
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1577 PTHREAD_RETURN_VOID;
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
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 // 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
1582
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1583 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
1584 void (*routine) (void *),
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1585 void *arg)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1586 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1587 PTHREAD_ENTRY();
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_info *self = pthread_self_info();
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 buffer->routine = routine;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1592 buffer->arg = arg;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1593
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1594 buffer->prev = self->cancelbuffer;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1595
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1596 self->cancelbuffer = buffer;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1597
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1598 return;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1599 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1600
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1601 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
1602 int execute)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
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1603 {
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1604 PTHREAD_ENTRY();
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1605
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1606 pthread_info *self = pthread_self_info();
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1607
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1608 CYG_ASSERT( self->cancelbuffer == buffer, "Stacking error in cleanup buffers");
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1609
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1610 if( self->cancelbuffer == buffer )
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1611 {
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1612 // Remove the buffer from the stack
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1613 self->cancelbuffer = buffer->prev;
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1614 }
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1615 else
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1616 {
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1617 // If the top of the stack is not the buffer we expect, do not
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1618 // execute it.
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1619 execute = 0;
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1620 }
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1621
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1622 if( execute ) buffer->routine(buffer->arg);
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1623
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1624 return;
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1625 }
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1626
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1627
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1628 // -------------------------------------------------------------------------
147
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1629 // eCos-specific function to measure stack usage of the supplied thread
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1630
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1631 #ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT
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1632 externC size_t pthread_measure_stack_usage (pthread_t thread)
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1633 {
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1634 pthread_info *th = pthread_info_id(thread);
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1635
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1636 if ( NULL == th )
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1637 return (size_t)-1;
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1638
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1639 return (size_t)th->thread->measure_stack_usage();
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1640 }
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1641 #endif
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1642
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1643 // -------------------------------------------------------------------------
115
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1644 // EOF pthread.cxx