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annotate Python/thread_pthread.h @ 24162:8ee2ab4f2a2d legacy-trunk

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_Py_AskYesNo(): Removed this function. It was defined only in a Py_TRACE_REFS build, but wasn't referenced.
author Tim Peters <tim.peters@gmail.com>
date Tue, 09 Jul 2002 18:22:55 +0000
parents 2548e2f323fa
children 3731be28e1a3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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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 #ifdef __APPLE__
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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 #ifdef __APPLE__
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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
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35 #elif defined(__osf__) && defined (__alpha)
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36 /* _DECTHREADS_ is defined in cma.h which is included by pthread.h */
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37 # if !defined(_PTHREAD_ENV_ALPHA) || defined(_PTHREAD_USE_D4) || defined(PTHREAD_USE_D4)
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38 # define PY_PTHREAD_D4
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39 # else
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40 # define PY_PTHREAD_STD
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41 # endif
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42
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43 #elif defined(_AIX)
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44 /* SCHED_BG_NP is defined if using AIX DCE pthreads
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45 * but it is unsupported by AIX 4 pthreads. Default
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46 * attributes for AIX 4 pthreads equal to NULL. For
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47 * AIX DCE pthreads they should be left unchanged.
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48 */
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49 # if !defined(SCHED_BG_NP)
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50 # define PY_PTHREAD_STD
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51 # else
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52 # define PY_PTHREAD_D7
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53 # endif
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54
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55 #elif defined(__DGUX)
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56 # define PY_PTHREAD_D6
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57
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58 #elif defined(__hpux) && defined(_DECTHREADS_)
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59 # define PY_PTHREAD_D4
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60
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61 #else /* Default case */
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62 # define PY_PTHREAD_STD
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63
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64 #endif
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65
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66 #ifdef USE_GUSI
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67 /* The Macintosh GUSI I/O library sets the stackspace to
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68 ** 20KB, much too low. We up it to 64K.
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69 */
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70 #define THREAD_STACK_SIZE 0x10000
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71 #endif
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72
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73
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74 /* set default attribute object for different versions */
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75
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76 #if defined(PY_PTHREAD_D4) || defined(PY_PTHREAD_D7)
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77 # define pthread_attr_default pthread_attr_default
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78 # define pthread_mutexattr_default pthread_mutexattr_default
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79 # define pthread_condattr_default pthread_condattr_default
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80 #elif defined(PY_PTHREAD_STD) || defined(PY_PTHREAD_D6)
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81 # define pthread_attr_default ((pthread_attr_t *)NULL)
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82 # define pthread_mutexattr_default ((pthread_mutexattr_t *)NULL)
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83 # define pthread_condattr_default ((pthread_condattr_t *)NULL)
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84 #endif
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86
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87 /* Whether or not to use semaphores directly rather than emulating them with
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88 * mutexes and condition variables:
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89 */
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90 #ifdef _POSIX_SEMAPHORES
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91 # define USE_SEMAPHORES
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92 #else
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93 # undef USE_SEMAPHORES
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94 #endif
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95
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96
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97 /* On platforms that don't use standard POSIX threads pthread_sigmask()
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98 * isn't present. DEC threads uses sigprocmask() instead as do most
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99 * other UNIX International compliant systems that don't have the full
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100 * pthread implementation.
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101 */
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102 #ifdef HAVE_PTHREAD_SIGMASK
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103 # define SET_THREAD_SIGMASK pthread_sigmask
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104 #else
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105 # define SET_THREAD_SIGMASK sigprocmask
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106 #endif
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107
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108
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109 /* A pthread mutex isn't sufficient to model the Python lock type
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110 * because, according to Draft 5 of the docs (P1003.4a/D5), both of the
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111 * following are undefined:
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112 * -> a thread tries to lock a mutex it already has locked
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113 * -> a thread tries to unlock a mutex locked by a different thread
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114 * pthread mutexes are designed for serializing threads over short pieces
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115 * of code anyway, so wouldn't be an appropriate implementation of
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116 * Python's locks regardless.
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117 *
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118 * The pthread_lock struct implements a Python lock as a "locked?" bit
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119 * and a <condition, mutex> pair. In general, if the bit can be acquired
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120 * instantly, it is, else the pair is used to block the thread until the
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121 * bit is cleared. 9 May 1994 tim@ksr.com
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122 */
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123
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124 typedef struct {
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125 char locked; /* 0=unlocked, 1=locked */
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126 /* a <cond, mutex> pair to handle an acquire of a locked lock */
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127 pthread_cond_t lock_released;
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128 pthread_mutex_t mut;
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129 } pthread_lock;
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130
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131 #define CHECK_STATUS(name) if (status != 0) { perror(name); error = 1; }
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132
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133 /*
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134 * Initialization.
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135 */
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136
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137 #ifdef _HAVE_BSDI
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138 static
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139 void _noop(void)
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140 {
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141 }
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142
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143 static void
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144 PyThread__init_thread(void)
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145 {
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146 /* DO AN INIT BY STARTING THE THREAD */
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147 static int dummy = 0;
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148 pthread_t thread1;
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149 pthread_create(&thread1, NULL, (void *) _noop, &dummy);
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150 pthread_join(thread1, NULL);
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151 }
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152
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153 #else /* !_HAVE_BSDI */
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154
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155 static void
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156 PyThread__init_thread(void)
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157 {
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158 #if defined(_AIX) && defined(__GNUC__)
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159 pthread_init();
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160 #endif
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161 }
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162
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163 #endif /* !_HAVE_BSDI */
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164
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165 /*
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166 * Thread support.
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167 */
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168
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169
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170 long
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171 PyThread_start_new_thread(void (*func)(void *), void *arg)
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172 {
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173 pthread_t th;
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174 int success;
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175 sigset_t oldmask, newmask;
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176 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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177 pthread_attr_t attrs;
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178 #endif
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179 dprintf(("PyThread_start_new_thread called\n"));
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180 if (!initialized)
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181 PyThread_init_thread();
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182
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183 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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184 pthread_attr_init(&attrs);
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185 #endif
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186 #ifdef THREAD_STACK_SIZE
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187 pthread_attr_setstacksize(&attrs, THREAD_STACK_SIZE);
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188 #endif
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189 #ifdef PTHREAD_SYSTEM_SCHED_SUPPORTED
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190 pthread_attr_setscope(&attrs, PTHREAD_SCOPE_SYSTEM);
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191 #endif
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192
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193 /* Mask all signals in the current thread before creating the new
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194 * thread. This causes the new thread to start with all signals
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195 * blocked.
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196 */
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197 sigfillset(&newmask);
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198 SET_THREAD_SIGMASK(SIG_BLOCK, &newmask, &oldmask);
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199
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200 success = pthread_create(&th,
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201 #if defined(PY_PTHREAD_D4)
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202 pthread_attr_default,
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203 (pthread_startroutine_t)func,
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204 (pthread_addr_t)arg
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205 #elif defined(PY_PTHREAD_D6)
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206 pthread_attr_default,
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207 (void* (*)(void *))func,
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208 arg
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209 #elif defined(PY_PTHREAD_D7)
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210 pthread_attr_default,
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211 func,
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212 arg
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213 #elif defined(PY_PTHREAD_STD)
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214 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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215 &attrs,
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216 #else
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217 (pthread_attr_t*)NULL,
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218 #endif
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219 (void* (*)(void *))func,
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220 (void *)arg
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221 #endif
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222 );
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223
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224 /* Restore signal mask for original thread */
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225 SET_THREAD_SIGMASK(SIG_SETMASK, &oldmask, NULL);
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226
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227 #if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
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228 pthread_attr_destroy(&attrs);
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229 #endif
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230 if (success == 0) {
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231 #if defined(PY_PTHREAD_D4) || defined(PY_PTHREAD_D6) || defined(PY_PTHREAD_D7)
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232 pthread_detach(&th);
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233 #elif defined(PY_PTHREAD_STD)
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234 pthread_detach(th);
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235 #endif
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236 }
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237 #if SIZEOF_PTHREAD_T <= SIZEOF_LONG
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238 return (long) th;
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239 #else
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240 return (long) *(long *) &th;
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241 #endif
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242 }
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243
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244 /* XXX This implementation is considered (to quote Tim Peters) "inherently
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245 hosed" because:
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246 - It does not guanrantee the promise that a non-zero integer is returned.
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247 - The cast to long is inherently unsafe.
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248 - It is not clear that the 'volatile' (for AIX?) and ugly casting in the
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249 latter return statement (for Alpha OSF/1) are any longer necessary.
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250 */
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251 long
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252 PyThread_get_thread_ident(void)
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253 {
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254 volatile pthread_t threadid;
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255 if (!initialized)
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256 PyThread_init_thread();
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257 /* Jump through some hoops for Alpha OSF/1 */
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258 threadid = pthread_self();
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259 #if SIZEOF_PTHREAD_T <= SIZEOF_LONG
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260 return (long) threadid;
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261 #else
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262 return (long) *(long *) &threadid;
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263 #endif
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264 }
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265
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266 static void
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267 do_PyThread_exit_thread(int no_cleanup)
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268 {
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269 dprintf(("PyThread_exit_thread called\n"));
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270 if (!initialized) {
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271 if (no_cleanup)
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272 _exit(0);
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273 else
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274 exit(0);
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275 }
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276 }
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277
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278 void
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279 PyThread_exit_thread(void)
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280 {
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281 do_PyThread_exit_thread(0);
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282 }
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283
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284 void
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285 PyThread__exit_thread(void)
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286 {
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287 do_PyThread_exit_thread(1);
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288 }
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289
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290 #ifndef NO_EXIT_PROG
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291 static void
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292 do_PyThread_exit_prog(int status, int no_cleanup)
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293 {
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294 dprintf(("PyThread_exit_prog(%d) called\n", status));
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295 if (!initialized)
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296 if (no_cleanup)
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297 _exit(status);
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298 else
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299 exit(status);
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300 }
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301
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302 void
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303 PyThread_exit_prog(int status)
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304 {
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305 do_PyThread_exit_prog(status, 0);
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306 }
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307
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308 void
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309 PyThread__exit_prog(int status)
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310 {
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311 do_PyThread_exit_prog(status, 1);
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312 }
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313 #endif /* NO_EXIT_PROG */
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314
22339
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315 #ifdef USE_SEMAPHORES
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316
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317 /*
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318 * Lock support.
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319 */
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320
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321 PyThread_type_lock
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322 PyThread_allocate_lock(void)
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323 {
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324 sem_t *lock;
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325 int status, error = 0;
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326
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327 dprintf(("PyThread_allocate_lock called\n"));
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328 if (!initialized)
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329 PyThread_init_thread();
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330
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331 lock = (sem_t *)malloc(sizeof(sem_t));
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332
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333 if (lock) {
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334 status = sem_init(lock,0,1);
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335 CHECK_STATUS("sem_init");
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336
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337 if (error) {
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338 free((void *)lock);
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339 lock = NULL;
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340 }
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341 }
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342
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343 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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344 return (PyThread_type_lock)lock;
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345 }
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346
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347 void
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348 PyThread_free_lock(PyThread_type_lock lock)
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349 {
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350 sem_t *thelock = (sem_t *)lock;
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351 int status, error = 0;
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352
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353 dprintf(("PyThread_free_lock(%p) called\n", lock));
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354
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355 if (!thelock)
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356 return;
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357
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358 status = sem_destroy(thelock);
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359 CHECK_STATUS("sem_destroy");
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360
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361 free((void *)thelock);
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362 }
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363
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364 /*
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365 * As of February 2002, Cygwin thread implementations mistakenly report error
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366 * codes in the return value of the sem_ calls (like the pthread_ functions).
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367 * Correct implementations return -1 and put the code in errno. This supports
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368 * either.
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369 */
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370 static int
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371 fix_status(int status)
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372 {
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373 return (status == -1) ? errno : status;
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374 }
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375
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376 int
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377 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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378 {
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379 int success;
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380 sem_t *thelock = (sem_t *)lock;
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381 int status, error = 0;
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382
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383 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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384
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385 do {
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386 if (waitflag)
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387 status = fix_status(sem_wait(thelock));
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diff changeset
388 else
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
389 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
390 } 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
391
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
392 if (waitflag) {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
393 CHECK_STATUS("sem_wait");
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
394 } else if (status != EAGAIN) {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
395 CHECK_STATUS("sem_trywait");
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
396 }
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
397
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
398 success = (status == 0) ? 1 : 0;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
399
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
400 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
401 return success;
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
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
404 void
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
405 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
406 {
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
407 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
408 int status, error = 0;
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
409
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
410 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
411
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
412 status = sem_post(thelock);
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
413 CHECK_STATUS("sem_post");
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
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
416 #else /* USE_SEMAPHORES */
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
417
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
418 /*
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
419 * Lock support.
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
420 */
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
421 PyThread_type_lock
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
422 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
423 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
424 pthread_lock *lock;
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
425 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
426
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 9290
diff changeset
427 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
428 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
429 PyThread_init_thread();
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
430
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
431 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
432 memset((void *)lock, '\0', sizeof(pthread_lock));
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
433 if (lock) {
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
434 lock->locked = 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
435
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
436 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
437 pthread_mutexattr_default);
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
438 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
439
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
440 status = pthread_cond_init(&lock->lock_released,
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
441 pthread_condattr_default);
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
442 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
443
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
444 if (error) {
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
445 free((void *)lock);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
446 lock = 0;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
447 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
448 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
449
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
450 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
451 return (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
452 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
453
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
454 void
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
455 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
456 {
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
457 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
458 int status, error = 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
459
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
460 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
461
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
462 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
463 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
464
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
465 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
466 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
467
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
468 free((void *)thelock);
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
469 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
470
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
471 int
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
472 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
473 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
474 int success;
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
475 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
476 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
477
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
478 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
479
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
480 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
481 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
482 success = thelock->locked == 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
483 if (success) thelock->locked = 1;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
484 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
485 CHECK_STATUS("pthread_mutex_unlock[1]");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
486
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
487 if ( !success && waitflag ) {
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
488 /* continue trying until we get the lock */
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
489
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
490 /* mut must be locked by me -- part of the condition
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
491 * protocol */
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
492 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
493 CHECK_STATUS("pthread_mutex_lock[2]");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
494 while ( thelock->locked ) {
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
495 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
496 &thelock->mut);
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
497 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
498 }
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
499 thelock->locked = 1;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
500 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
501 CHECK_STATUS("pthread_mutex_unlock[2]");
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
502 success = 1;
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
503 }
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
504 if (error) success = 0;
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
505 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
506 return success;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
507 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
508
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
509 void
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
510 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
511 {
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
512 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
513 int status, error = 0;
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
514
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 10400
diff changeset
515 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
516
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
517 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
518 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
519
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
520 thelock->locked = 0;
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
521
1629
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
522 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
523 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
524
4121afd76d73 Tim's changes; removed some remaining non-functional ifdefs
Guido van Rossum <guido@python.org>
parents: 1628
diff changeset
525 /* 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
526 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
527 CHECK_STATUS("pthread_cond_signal");
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
528 }
22339
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
529
6c3e32357d91 Patch #525532: Add support for POSIX semaphores.
Martin v. Löwis <martin@v.loewis.de>
parents: 21766
diff changeset
530 #endif /* USE_SEMAPHORES */