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annotate Python/thread_pthread.h @ 30978:4c8160088b34 legacy-trunk

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Getting rid of code dependent on GUSI or the MetroWerks compiler.
author Jack Jansen <jack.jansen@cwi.nl>
date Wed, 19 Nov 2003 22:52:23 +0000
parents a408ac5527c3
children 4055375dc05e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2 /* Posix threads interface */
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3
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4 #include <stdlib.h>
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5 #include <string.h>
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6 #if defined(__APPLE__) || defined(HAVE_PTHREAD_DESTRUCTOR)
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7 #define destructor xxdestructor
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8 #endif
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9 #include <pthread.h>
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10 #if defined(__APPLE__) || defined(HAVE_PTHREAD_DESTRUCTOR)
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11 #undef destructor
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12 #endif
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13 #include <signal.h>
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14
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15 /* The POSIX spec says that implementations supporting the sem_*
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16 family of functions must indicate this by defining
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17 _POSIX_SEMAPHORES. */
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18 #ifdef _POSIX_SEMAPHORES
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19 #include <semaphore.h>
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20 #include <errno.h>
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21 #endif
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23
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24 /* try to determine what version of the Pthread Standard is installed.
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25 * this is important, since all sorts of parameter types changed from
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26 * draft to draft and there are several (incompatible) drafts in
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27 * common use. these macros are a start, at least.
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28 * 12 May 1997 -- david arnold <davida@pobox.com>
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29 */
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30
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31 #if defined(__ultrix) && defined(__mips) && defined(_DECTHREADS_)
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32 /* _DECTHREADS_ is defined in cma.h which is included by pthread.h */
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33 # define PY_PTHREAD_D4
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34 # error Systems with PY_PTHREAD_D4 are unsupported. See README.
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36 #elif defined(__osf__) && defined (__alpha)
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37 /* _DECTHREADS_ is defined in cma.h which is included by pthread.h */
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38 # if !defined(_PTHREAD_ENV_ALPHA) || defined(_PTHREAD_USE_D4) || defined(PTHREAD_USE_D4)
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39 # define PY_PTHREAD_D4
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40 # error Systems with PY_PTHREAD_D4 are unsupported. See README.
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41 # else
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42 # define PY_PTHREAD_STD
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43 # endif
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44
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45 #elif defined(_AIX)
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46 /* SCHED_BG_NP is defined if using AIX DCE pthreads
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47 * but it is unsupported by AIX 4 pthreads. Default
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48 * attributes for AIX 4 pthreads equal to NULL. For
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49 * AIX DCE pthreads they should be left unchanged.
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50 */
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51 # if !defined(SCHED_BG_NP)
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52 # define PY_PTHREAD_STD
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53 # else
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54 # define PY_PTHREAD_D7
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55 # error Systems with PY_PTHREAD_D7 are unsupported. See README.
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56 # endif
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57
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58 #elif defined(__DGUX)
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59 # define PY_PTHREAD_D6
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60 # error Systems with PY_PTHREAD_D6 are unsupported. See README.
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61
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62 #elif defined(__hpux) && defined(_DECTHREADS_)
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63 # define PY_PTHREAD_D4
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64 # error Systems with PY_PTHREAD_D4 are unsupported. See README.
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66 #else /* Default case */
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67 # define PY_PTHREAD_STD
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69 #endif
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71 /* set default attribute object for different versions */
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72
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73 #if defined(PY_PTHREAD_D4) || defined(PY_PTHREAD_D7)
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74 #if !defined(pthread_attr_default)
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75 # define pthread_attr_default pthread_attr_default
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76 #endif
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77 #if !defined(pthread_mutexattr_default)
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78 # define pthread_mutexattr_default pthread_mutexattr_default
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79 #endif
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80 #if !defined(pthread_condattr_default)
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81 # define pthread_condattr_default pthread_condattr_default
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82 #endif
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83 #elif defined(PY_PTHREAD_STD) || defined(PY_PTHREAD_D6)
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84 #if !defined(pthread_attr_default)
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85 # define pthread_attr_default ((pthread_attr_t *)NULL)
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86 #endif
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87 #if !defined(pthread_mutexattr_default)
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88 # define pthread_mutexattr_default ((pthread_mutexattr_t *)NULL)
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89 #endif
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90 #if !defined(pthread_condattr_default)
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91 # define pthread_condattr_default ((pthread_condattr_t *)NULL)
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92 #endif
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93 #endif
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96 /* Whether or not to use semaphores directly rather than emulating them with
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97 * mutexes and condition variables:
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98 */
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99 #if defined(_POSIX_SEMAPHORES) && !defined(HAVE_BROKEN_POSIX_SEMAPHORES)
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100 # define USE_SEMAPHORES
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101 #else
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102 # undef USE_SEMAPHORES
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103 #endif
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104
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105
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106 /* On platforms that don't use standard POSIX threads pthread_sigmask()
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107 * isn't present. DEC threads uses sigprocmask() instead as do most
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108 * other UNIX International compliant systems that don't have the full
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109 * pthread implementation.
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110 */
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111 #if defined(HAVE_PTHREAD_SIGMASK) && !defined(HAVE_BROKEN_PTHREAD_SIGMASK)
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112 # define SET_THREAD_SIGMASK pthread_sigmask
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113 #else
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114 # define SET_THREAD_SIGMASK sigprocmask
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115 #endif
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116
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117
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118 /* A pthread mutex isn't sufficient to model the Python lock type
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119 * because, according to Draft 5 of the docs (P1003.4a/D5), both of the
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120 * following are undefined:
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121 * -> a thread tries to lock a mutex it already has locked
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122 * -> a thread tries to unlock a mutex locked by a different thread
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123 * pthread mutexes are designed for serializing threads over short pieces
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124 * of code anyway, so wouldn't be an appropriate implementation of
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125 * Python's locks regardless.
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126 *
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127 * The pthread_lock struct implements a Python lock as a "locked?" bit
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128 * and a <condition, mutex> pair. In general, if the bit can be acquired
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129 * instantly, it is, else the pair is used to block the thread until the
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130 * bit is cleared. 9 May 1994 tim@ksr.com
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131 */
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132
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133 typedef struct {
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134 char locked; /* 0=unlocked, 1=locked */
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135 /* a <cond, mutex> pair to handle an acquire of a locked lock */
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136 pthread_cond_t lock_released;
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137 pthread_mutex_t mut;
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138 } pthread_lock;
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139
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140 #define CHECK_STATUS(name) if (status != 0) { perror(name); error = 1; }
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141
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142 /*
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143 * Initialization.
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144 */
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145
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146 #ifdef _HAVE_BSDI
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147 static
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148 void _noop(void)
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149 {
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150 }
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151
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152 static void
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153 PyThread__init_thread(void)
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154 {
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155 /* DO AN INIT BY STARTING THE THREAD */
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156 static int dummy = 0;
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157 pthread_t thread1;
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158 pthread_create(&thread1, NULL, (void *) _noop, &dummy);
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159 pthread_join(thread1, NULL);
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160 }
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161
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162 #else /* !_HAVE_BSDI */
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163
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164 static void
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165 PyThread__init_thread(void)
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166 {
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167 #if defined(_AIX) && defined(__GNUC__)
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168 pthread_init();
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169 #endif
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170 }
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171
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172 #endif /* !_HAVE_BSDI */
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173
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174 /*
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175 * Thread support.
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176 */
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177
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178
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179 long
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180 PyThread_start_new_thread(void (*func)(void *), void *arg)
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181 {
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182 pthread_t th;
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183 int status;
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184 sigset_t oldmask, newmask;
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185 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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186 pthread_attr_t attrs;
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187 #endif
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188 dprintf(("PyThread_start_new_thread called\n"));
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189 if (!initialized)
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190 PyThread_init_thread();
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191
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192 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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193 pthread_attr_init(&attrs);
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194 #endif
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195 #ifdef THREAD_STACK_SIZE
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196 pthread_attr_setstacksize(&attrs, THREAD_STACK_SIZE);
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197 #endif
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198 #ifdef PTHREAD_SYSTEM_SCHED_SUPPORTED
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199 pthread_attr_setscope(&attrs, PTHREAD_SCOPE_SYSTEM);
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200 #endif
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201
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202 /* Mask all signals in the current thread before creating the new
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203 * thread. This causes the new thread to start with all signals
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204 * blocked.
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205 */
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206 sigfillset(&newmask);
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207 SET_THREAD_SIGMASK(SIG_BLOCK, &newmask, &oldmask);
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208
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209 status = pthread_create(&th,
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210 #if defined(PY_PTHREAD_D4)
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211 pthread_attr_default,
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212 (pthread_startroutine_t)func,
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213 (pthread_addr_t)arg
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214 #elif defined(PY_PTHREAD_D6)
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215 pthread_attr_default,
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216 (void* (*)(void *))func,
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217 arg
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218 #elif defined(PY_PTHREAD_D7)
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219 pthread_attr_default,
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220 func,
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221 arg
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222 #elif defined(PY_PTHREAD_STD)
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223 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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224 &attrs,
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225 #else
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226 (pthread_attr_t*)NULL,
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227 #endif
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228 (void* (*)(void *))func,
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229 (void *)arg
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230 #endif
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231 );
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232
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233 /* Restore signal mask for original thread */
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234 SET_THREAD_SIGMASK(SIG_SETMASK, &oldmask, NULL);
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235
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236 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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237 pthread_attr_destroy(&attrs);
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238 #endif
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239 if (status != 0)
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240 return -1;
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241
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242 #if defined(PY_PTHREAD_D4) || defined(PY_PTHREAD_D6) || defined(PY_PTHREAD_D7)
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243 pthread_detach(&th);
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244 #elif defined(PY_PTHREAD_STD)
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245 pthread_detach(th);
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246 #endif
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247
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248 #if SIZEOF_PTHREAD_T <= SIZEOF_LONG
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249 return (long) th;
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250 #else
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251 return (long) *(long *) &th;
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252 #endif
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253 }
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254
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255 /* XXX This implementation is considered (to quote Tim Peters) "inherently
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256 hosed" because:
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257 - It does not guanrantee the promise that a non-zero integer is returned.
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258 - The cast to long is inherently unsafe.
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259 - It is not clear that the 'volatile' (for AIX?) and ugly casting in the
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260 latter return statement (for Alpha OSF/1) are any longer necessary.
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261 */
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262 long
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263 PyThread_get_thread_ident(void)
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264 {
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265 volatile pthread_t threadid;
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266 if (!initialized)
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267 PyThread_init_thread();
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268 /* Jump through some hoops for Alpha OSF/1 */
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269 threadid = pthread_self();
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270 #if SIZEOF_PTHREAD_T <= SIZEOF_LONG
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271 return (long) threadid;
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272 #else
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273 return (long) *(long *) &threadid;
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274 #endif
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275 }
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276
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277 static void
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278 do_PyThread_exit_thread(int no_cleanup)
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279 {
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280 dprintf(("PyThread_exit_thread called\n"));
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281 if (!initialized) {
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282 if (no_cleanup)
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283 _exit(0);
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284 else
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285 exit(0);
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286 }
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287 }
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288
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289 void
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290 PyThread_exit_thread(void)
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291 {
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292 do_PyThread_exit_thread(0);
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293 }
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294
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295 void
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296 PyThread__exit_thread(void)
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297 {
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298 do_PyThread_exit_thread(1);
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299 }
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300
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301 #ifndef NO_EXIT_PROG
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302 static void
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303 do_PyThread_exit_prog(int status, int no_cleanup)
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304 {
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305 dprintf(("PyThread_exit_prog(%d) called\n", status));
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306 if (!initialized)
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307 if (no_cleanup)
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308 _exit(status);
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309 else
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310 exit(status);
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311 }
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312
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313 void
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314 PyThread_exit_prog(int status)
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315 {
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316 do_PyThread_exit_prog(status, 0);
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317 }
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318
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319 void
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320 PyThread__exit_prog(int status)
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321 {
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322 do_PyThread_exit_prog(status, 1);
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323 }
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324 #endif /* NO_EXIT_PROG */
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325
22339
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326 #ifdef USE_SEMAPHORES
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327
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328 /*
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329 * Lock support.
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330 */
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331
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332 PyThread_type_lock
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333 PyThread_allocate_lock(void)
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334 {
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335 sem_t *lock;
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336 int status, error = 0;
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337
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338 dprintf(("PyThread_allocate_lock called\n"));
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339 if (!initialized)
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340 PyThread_init_thread();
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341
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342 lock = (sem_t *)malloc(sizeof(sem_t));
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343
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344 if (lock) {
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345 status = sem_init(lock,0,1);
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346 CHECK_STATUS("sem_init");
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347
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348 if (error) {
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349 free((void *)lock);
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350 lock = NULL;
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351 }
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352 }
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353
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354 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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355 return (PyThread_type_lock)lock;
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356 }
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357
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358 void
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359 PyThread_free_lock(PyThread_type_lock lock)
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360 {
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361 sem_t *thelock = (sem_t *)lock;
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362 int status, error = 0;
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363
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364 dprintf(("PyThread_free_lock(%p) called\n", lock));
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365
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366 if (!thelock)
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367 return;
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368
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369 status = sem_destroy(thelock);
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370 CHECK_STATUS("sem_destroy");
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371
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372 free((void *)thelock);
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373 }
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374
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375 /*
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376 * As of February 2002, Cygwin thread implementations mistakenly report error
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377 * codes in the return value of the sem_ calls (like the pthread_ functions).
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378 * Correct implementations return -1 and put the code in errno. This supports
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379 * either.
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380 */
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381 static int
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382 fix_status(int status)
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383 {
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diff changeset
384 return (status == -1) ? errno : status;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
385 }
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
386
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
387 int
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
388 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
389 {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
390 int success;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
391 sem_t *thelock = (sem_t *)lock;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
392 int status, error = 0;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
393
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
394 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
395
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
396 do {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
397 if (waitflag)
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
398 status = fix_status(sem_wait(thelock));
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
399 else
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
400 status = fix_status(sem_trywait(thelock));
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
401 } while (status == EINTR); /* Retry if interrupted by a signal */
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
402
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
403 if (waitflag) {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
404 CHECK_STATUS("sem_wait");
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
405 } else if (status != EAGAIN) {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
406 CHECK_STATUS("sem_trywait");
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
407 }
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
408
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
409 success = (status == 0) ? 1 : 0;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
410
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
411 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
412 return success;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
413 }
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
414
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
415 void
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
416 PyThread_release_lock(PyThread_type_lock lock)
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
417 {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
418 sem_t *thelock = (sem_t *)lock;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
419 int status, error = 0;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
420
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
421 dprintf(("PyThread_release_lock(%p) called\n", lock));
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
422
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
423 status = sem_post(thelock);
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
424 CHECK_STATUS("sem_post");
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
425 }
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
426
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
427 #else /* USE_SEMAPHORES */
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
428
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
429 /*
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
430 * Lock support.
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
431 */
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
432 PyThread_type_lock
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
433 PyThread_allocate_lock(void)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
434 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
435 pthread_lock *lock;
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
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diff changeset
436 int status, error = 0;
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
437
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 9290
diff changeset
438 dprintf(("PyThread_allocate_lock called\n"));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
439 if (!initialized)
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 9290
diff changeset
440 PyThread_init_thread();
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
441
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
442 lock = (pthread_lock *) malloc(sizeof(pthread_lock));
9290
2340f615da8f BSDI specific patches, inspired by Nigel Head and otto@mail.olympus.net.
Guido van Rossum <guido@python.org>
parents: 9079
diff changeset
443 memset((void *)lock, '\0', sizeof(pthread_lock));
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
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parents: 1628
diff changeset
444 if (lock) {
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
445 lock->locked = 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
446
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
447 status = pthread_mutex_init(&lock->mut,
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
448 pthread_mutexattr_default);
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
449 CHECK_STATUS("pthread_mutex_init");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
450
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
451 status = pthread_cond_init(&lock->lock_released,
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
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diff changeset
452 pthread_condattr_default);
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
453 CHECK_STATUS("pthread_cond_init");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
454
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
455 if (error) {
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
456 free((void *)lock);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
457 lock = 0;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
458 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
459 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
460
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
461 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 9290
diff changeset
462 return (PyThread_type_lock) lock;
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
463 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
464
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
465 void
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
466 PyThread_free_lock(PyThread_type_lock lock)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
467 {
1629
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Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
468 pthread_lock *thelock = (pthread_lock *)lock;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
469 int status, error = 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
470
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
471 dprintf(("PyThread_free_lock(%p) called\n", lock));
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
472
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
473 status = pthread_mutex_destroy( &thelock->mut );
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
474 CHECK_STATUS("pthread_mutex_destroy");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
475
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
476 status = pthread_cond_destroy( &thelock->lock_released );
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
477 CHECK_STATUS("pthread_cond_destroy");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
478
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
479 free((void *)thelock);
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
480 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
481
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
482 int
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
483 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
484 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
485 int success;
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
486 pthread_lock *thelock = (pthread_lock *)lock;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
487 int status, error = 0;
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
488
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
489 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
490
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
491 status = pthread_mutex_lock( &thelock->mut );
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
492 CHECK_STATUS("pthread_mutex_lock[1]");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
493 success = thelock->locked == 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
494
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
495 if ( !success && waitflag ) {
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
496 /* continue trying until we get the lock */
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
497
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
498 /* mut must be locked by me -- part of the condition
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Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
499 * protocol */
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
500 while ( thelock->locked ) {
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
501 status = pthread_cond_wait(&thelock->lock_released,
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
502 &thelock->mut);
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
503 CHECK_STATUS("pthread_cond_wait");
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
504 }
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
505 success = 1;
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
506 }
28673
c1ba50790c83 Patch #711835: Remove unnecessary lock operations. Will backport to 2.2.
Martin v. Löwis <martin@v.loewis.de>
parents: 27320
diff changeset
507 if (success) thelock->locked = 1;
c1ba50790c83 Patch #711835: Remove unnecessary lock operations. Will backport to 2.2.
Martin v. Löwis <martin@v.loewis.de>
parents: 27320
diff changeset
508 status = pthread_mutex_unlock( &thelock->mut );
c1ba50790c83 Patch #711835: Remove unnecessary lock operations. Will backport to 2.2.
Martin v. Löwis <martin@v.loewis.de>
parents: 27320
diff changeset
509 CHECK_STATUS("pthread_mutex_unlock[1]");
c1ba50790c83 Patch #711835: Remove unnecessary lock operations. Will backport to 2.2.
Martin v. Löwis <martin@v.loewis.de>
parents: 27320
diff changeset
510
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
511 if (error) success = 0;
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
512 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
513 return success;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
514 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
515
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
516 void
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
517 PyThread_release_lock(PyThread_type_lock lock)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
518 {
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
519 pthread_lock *thelock = (pthread_lock *)lock;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
520 int status, error = 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
521
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
522 dprintf(("PyThread_release_lock(%p) called\n", lock));
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
523
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
524 status = pthread_mutex_lock( &thelock->mut );
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
525 CHECK_STATUS("pthread_mutex_lock[3]");
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
526
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
527 thelock->locked = 0;
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a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
528
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
529 status = pthread_mutex_unlock( &thelock->mut );
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
530 CHECK_STATUS("pthread_mutex_unlock[3]");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
531
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
532 /* wake up someone (anyone, if any) waiting on the lock */
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
533 status = pthread_cond_signal( &thelock->lock_released );
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
534 CHECK_STATUS("pthread_cond_signal");
1628
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Guido van Rossum <guido@python.org>
parents:
diff changeset
535 }
22339
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
536
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
537 #endif /* USE_SEMAPHORES */