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annotate Python/thread_sgi.h @ 24155:9456a2ccda61 legacy-trunk

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The Py_REF_DEBUG/COUNT_ALLOCS/Py_TRACE_REFS macro minefield: added more trivial lexical helper macros so that uses of these guys expand to nothing at all when they're not enabled. This should help sub- standard compilers that can't do a good job of optimizing away the previous "(void)0" expressions. Py_DECREF: There's only one definition of this now. Yay! That was that last one in the family defined multiple times in an #ifdef maze. Py_FatalError(): Changed the char* signature to const char*. _Py_NegativeRefcount(): New helper function for the Py_REF_DEBUG expansion of Py_DECREF. Calling an external function cuts down on the volume of generated code. The previous inline expansion of abort() didn't work as intended on Windows (the program often kept going, and the error msg scrolled off the screen unseen). _Py_NegativeRefcount calls Py_FatalError instead, which captures our best knowledge of how to abort effectively across platforms.
author Tim Peters <tim.peters@gmail.com>
date Tue, 09 Jul 2002 02:57:01 +0000
parents 8b116a8449bd
children a4154dd5939a
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1
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2 #ifdef WITH_SGI_DL
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3 #define USE_DL
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4 #endif
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5
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6 #include <stdlib.h>
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7 #include <stdio.h>
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8 #include <signal.h>
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9 #include <sys/types.h>
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10 #include <sys/wait.h>
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11 #include <sys/prctl.h>
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12 #include <ulocks.h>
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13 #include <errno.h>
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14
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15 #define HDR_SIZE 2680 /* sizeof(ushdr_t) */
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16 #define MAXPROC 100 /* max # of threads that can be started */
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17
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18 static usptr_t *shared_arena;
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19 static ulock_t count_lock; /* protection for some variables */
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20 static ulock_t wait_lock; /* lock used to wait for other threads */
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21 static int waiting_for_threads; /* protected by count_lock */
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22 static int nthreads; /* protected by count_lock */
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23 static int exit_status;
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24 #ifndef NO_EXIT_PROG
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25 static int do_exit; /* indicates that the program is to exit */
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26 #endif
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27 static int exiting; /* we're already exiting (for maybe_exit) */
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28 static pid_t my_pid; /* PID of main thread */
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29 static struct pidlist {
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30 pid_t parent;
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31 pid_t child;
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32 } pidlist[MAXPROC]; /* PIDs of other threads; protected by count_lock */
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33 static int maxpidindex; /* # of PIDs in pidlist */
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34
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35 #ifndef NO_EXIT_PROG
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36 /*
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37 * This routine is called as a signal handler when another thread
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38 * exits. When that happens, we must see whether we have to exit as
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39 * well (because of an PyThread_exit_prog()) or whether we should continue on.
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40 */
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41 static void exit_sig(void)
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42 {
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43 d2printf(("exit_sig called\n"));
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44 if (exiting && getpid() == my_pid) {
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45 d2printf(("already exiting\n"));
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46 return;
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47 }
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48 if (do_exit) {
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49 d2printf(("exiting in exit_sig\n"));
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50 #ifdef Py_DEBUG
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51 if ((thread_debug & 8) == 0)
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52 thread_debug &= ~1; /* don't produce debug messages */
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53 #endif
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54 PyThread_exit_thread();
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55 }
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56 }
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57
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58 /*
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59 * This routine is called when a process calls exit(). If that wasn't
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60 * done from the library, we do as if an PyThread_exit_prog() was intended.
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61 */
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62 static void maybe_exit(void)
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63 {
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64 dprintf(("maybe_exit called\n"));
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65 if (exiting) {
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66 dprintf(("already exiting\n"));
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67 return;
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68 }
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69 PyThread_exit_prog(0);
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70 }
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71 #endif /* NO_EXIT_PROG */
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72
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73 /*
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74 * Initialization.
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75 */
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76 static void PyThread__init_thread(void)
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77 {
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78 #ifndef NO_EXIT_PROG
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79 struct sigaction s;
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80 #endif /* NO_EXIT_PROG */
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81 #ifdef USE_DL
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82 long addr, size;
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83 #endif /* USE_DL */
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84
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85
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86 #ifdef USE_DL
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87 if ((size = usconfig(CONF_INITSIZE, 64*1024)) < 0)
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88 perror("usconfig - CONF_INITSIZE (check)");
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89 if (usconfig(CONF_INITSIZE, size) < 0)
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90 perror("usconfig - CONF_INITSIZE (reset)");
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91 addr = (long) dl_getrange(size + HDR_SIZE);
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92 dprintf(("trying to use addr %p-%p for shared arena\n", addr, addr+size));
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93 errno = 0;
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94 if ((addr = usconfig(CONF_ATTACHADDR, addr)) < 0 && errno != 0)
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95 perror("usconfig - CONF_ATTACHADDR (set)");
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96 #endif /* USE_DL */
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97 if (usconfig(CONF_INITUSERS, 16) < 0)
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98 perror("usconfig - CONF_INITUSERS");
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99 my_pid = getpid(); /* so that we know which is the main thread */
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100 #ifndef NO_EXIT_PROG
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101 atexit(maybe_exit);
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102 s.sa_handler = exit_sig;
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103 sigemptyset(&s.sa_mask);
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104 /*sigaddset(&s.sa_mask, SIGUSR1);*/
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105 s.sa_flags = 0;
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106 sigaction(SIGUSR1, &s, 0);
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107 if (prctl(PR_SETEXITSIG, SIGUSR1) < 0)
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108 perror("prctl - PR_SETEXITSIG");
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109 #endif /* NO_EXIT_PROG */
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110 if (usconfig(CONF_ARENATYPE, US_SHAREDONLY) < 0)
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111 perror("usconfig - CONF_ARENATYPE");
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112 usconfig(CONF_LOCKTYPE, US_DEBUG); /* XXX */
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113 #ifdef Py_DEBUG
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114 if (thread_debug & 4)
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115 usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);
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116 else if (thread_debug & 2)
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117 usconfig(CONF_LOCKTYPE, US_DEBUG);
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118 #endif /* Py_DEBUG */
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119 if ((shared_arena = usinit(tmpnam(0))) == 0)
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120 perror("usinit");
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121 #ifdef USE_DL
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122 if (usconfig(CONF_ATTACHADDR, addr) < 0) /* reset address */
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123 perror("usconfig - CONF_ATTACHADDR (reset)");
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124 #endif /* USE_DL */
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125 if ((count_lock = usnewlock(shared_arena)) == NULL)
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126 perror("usnewlock (count_lock)");
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127 (void) usinitlock(count_lock);
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128 if ((wait_lock = usnewlock(shared_arena)) == NULL)
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129 perror("usnewlock (wait_lock)");
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130 dprintf(("arena start: %p, arena size: %ld\n", shared_arena, (long) usconfig(CONF_GETSIZE, shared_arena)));
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131 }
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132
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133 /*
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134 * Thread support.
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135 */
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136
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137 static void clean_threads(void)
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138 {
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139 int i, j;
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140 pid_t mypid, pid;
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141
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142 /* clean up any exited threads */
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143 mypid = getpid();
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144 i = 0;
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145 while (i < maxpidindex) {
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146 if (pidlist[i].parent == mypid && (pid = pidlist[i].child) > 0) {
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147 pid = waitpid(pid, 0, WNOHANG);
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148 if (pid > 0) {
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149 /* a thread has exited */
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150 pidlist[i] = pidlist[--maxpidindex];
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151 /* remove references to children of dead proc */
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152 for (j = 0; j < maxpidindex; j++)
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153 if (pidlist[j].parent == pid)
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154 pidlist[j].child = -1;
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155 continue; /* don't increment i */
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156 }
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157 }
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158 i++;
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159 }
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160 /* clean up the list */
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161 i = 0;
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162 while (i < maxpidindex) {
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163 if (pidlist[i].child == -1) {
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164 pidlist[i] = pidlist[--maxpidindex];
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165 continue; /* don't increment i */
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166 }
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167 i++;
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168 }
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169 }
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170
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171 long PyThread_start_new_thread(void (*func)(void *), void *arg)
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172 {
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173 #ifdef USE_DL
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174 long addr, size;
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175 static int local_initialized = 0;
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176 #endif /* USE_DL */
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177 int success = 0; /* init not needed when SOLARIS_THREADS and */
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178 /* C_THREADS implemented properly */
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179
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180 dprintf(("PyThread_start_new_thread called\n"));
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181 if (!initialized)
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182 PyThread_init_thread();
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183 switch (ussetlock(count_lock)) {
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184 case 0: return 0;
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185 case -1: perror("ussetlock (count_lock)");
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186 }
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187 if (maxpidindex >= MAXPROC)
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188 success = -1;
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189 else {
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190 #ifdef USE_DL
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191 if (!local_initialized) {
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192 if ((size = usconfig(CONF_INITSIZE, 64*1024)) < 0)
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193 perror("usconfig - CONF_INITSIZE (check)");
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194 if (usconfig(CONF_INITSIZE, size) < 0)
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195 perror("usconfig - CONF_INITSIZE (reset)");
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diff changeset
196 addr = (long) dl_getrange(size + HDR_SIZE);
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197 dprintf(("trying to use addr %p-%p for sproc\n",
1655
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diff changeset
198 addr, addr+size));
1628
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199 errno = 0;
1655
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200 if ((addr = usconfig(CONF_ATTACHADDR, addr)) < 0 &&
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diff changeset
201 errno != 0)
1628
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202 perror("usconfig - CONF_ATTACHADDR (set)");
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diff changeset
203 }
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204 #endif /* USE_DL */
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205 clean_threads();
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diff changeset
206 if ((success = sproc(func, PR_SALL, arg)) < 0)
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diff changeset
207 perror("sproc");
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diff changeset
208 #ifdef USE_DL
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diff changeset
209 if (!local_initialized) {
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diff changeset
210 if (usconfig(CONF_ATTACHADDR, addr) < 0)
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
211 /* reset address */
1628
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212 perror("usconfig - CONF_ATTACHADDR (reset)");
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diff changeset
213 local_initialized = 1;
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diff changeset
214 }
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diff changeset
215 #endif /* USE_DL */
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diff changeset
216 if (success >= 0) {
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diff changeset
217 nthreads++;
1655
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diff changeset
218 pidlist[maxpidindex].parent = getpid();
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diff changeset
219 pidlist[maxpidindex++].child = success;
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diff changeset
220 dprintf(("pidlist[%d] = %d\n",
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
221 maxpidindex-1, success));
1628
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diff changeset
222 }
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diff changeset
223 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
224 if (usunsetlock(count_lock) < 0)
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diff changeset
225 perror("usunsetlock (count_lock)");
20468
ebfd87e87884 Partial patch from SF #452266, by Jason Petrone.
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diff changeset
226 return success;
1628
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diff changeset
227 }
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228
13658
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Thomas Wouters <thomas@python.org>
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diff changeset
229 long PyThread_get_thread_ident(void)
1651
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
230 {
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
231 return getpid();
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
232 }
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
233
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diff changeset
234 static void do_PyThread_exit_thread(int no_cleanup)
1628
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diff changeset
235 {
9679
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diff changeset
236 dprintf(("PyThread_exit_thread called\n"));
1628
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diff changeset
237 if (!initialized)
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diff changeset
238 if (no_cleanup)
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diff changeset
239 _exit(0);
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parents:
diff changeset
240 else
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diff changeset
241 exit(0);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
242 if (ussetlock(count_lock) < 0)
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diff changeset
243 perror("ussetlock (count_lock)");
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diff changeset
244 nthreads--;
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diff changeset
245 if (getpid() == my_pid) {
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diff changeset
246 /* main thread; wait for other threads to exit */
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diff changeset
247 exiting = 1;
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diff changeset
248 #ifndef NO_EXIT_PROG
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parents:
diff changeset
249 if (do_exit) {
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parents:
diff changeset
250 int i;
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diff changeset
251
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
252 /* notify other threads */
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diff changeset
253 clean_threads();
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diff changeset
254 if (nthreads >= 0) {
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parents:
diff changeset
255 dprintf(("kill other threads\n"));
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parents:
diff changeset
256 for (i = 0; i < maxpidindex; i++)
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diff changeset
257 if (pidlist[i].child > 0)
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
258 (void) kill(pidlist[i].child,
1628
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parents:
diff changeset
259 SIGKILL);
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diff changeset
260 _exit(exit_status);
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parents:
diff changeset
261 }
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Guido van Rossum <guido@python.org>
parents:
diff changeset
262 }
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263 #endif /* NO_EXIT_PROG */
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264 waiting_for_threads = 1;
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diff changeset
265 if (ussetlock(wait_lock) < 0)
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parents:
diff changeset
266 perror("ussetlock (wait_lock)");
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Guido van Rossum <guido@python.org>
parents:
diff changeset
267 for (;;) {
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268 if (nthreads < 0) {
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269 dprintf(("really exit (%d)\n", exit_status));
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parents:
diff changeset
270 if (no_cleanup)
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diff changeset
271 _exit(exit_status);
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parents:
diff changeset
272 else
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diff changeset
273 exit(exit_status);
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Guido van Rossum <guido@python.org>
parents:
diff changeset
274 }
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275 if (usunsetlock(count_lock) < 0)
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276 perror("usunsetlock (count_lock)");
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277 dprintf(("waiting for other threads (%d)\n", nthreads));
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278 if (ussetlock(wait_lock) < 0)
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parents:
diff changeset
279 perror("ussetlock (wait_lock)");
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parents:
diff changeset
280 if (ussetlock(count_lock) < 0)
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parents:
diff changeset
281 perror("ussetlock (count_lock)");
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parents:
diff changeset
282 }
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Guido van Rossum <guido@python.org>
parents:
diff changeset
283 }
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284 /* not the main thread */
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diff changeset
285 if (waiting_for_threads) {
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Guido van Rossum <guido@python.org>
parents:
diff changeset
286 dprintf(("main thread is waiting\n"));
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diff changeset
287 if (usunsetlock(wait_lock) < 0)
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288 perror("usunsetlock (wait_lock)");
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Guido van Rossum <guido@python.org>
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diff changeset
289 }
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diff changeset
290 #ifndef NO_EXIT_PROG
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Guido van Rossum <guido@python.org>
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diff changeset
291 else if (do_exit)
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292 (void) kill(my_pid, SIGUSR1);
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diff changeset
293 #endif /* NO_EXIT_PROG */
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diff changeset
294 if (usunsetlock(count_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
295 perror("usunsetlock (count_lock)");
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Guido van Rossum <guido@python.org>
parents:
diff changeset
296 _exit(0);
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parents:
diff changeset
297 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
298
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299 void PyThread_exit_thread(void)
1628
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300 {
9679
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301 do_PyThread_exit_thread(0);
1628
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parents:
diff changeset
302 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
303
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304 void PyThread__exit_thread(void)
1628
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305 {
9679
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diff changeset
306 do_PyThread_exit_thread(1);
1628
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parents:
diff changeset
307 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
308
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
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diff changeset
309 #ifndef NO_EXIT_PROG
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diff changeset
310 static void do_PyThread_exit_prog(int status, int no_cleanup)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
311 {
9679
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diff changeset
312 dprintf(("PyThread_exit_prog(%d) called\n", status));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
313 if (!initialized)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
314 if (no_cleanup)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
315 _exit(status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
316 else
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
317 exit(status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
318 do_exit = 1;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
319 exit_status = status;
9679
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diff changeset
320 do_PyThread_exit_thread(no_cleanup);
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
321 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
322
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diff changeset
323 void PyThread_exit_prog(int status)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
324 {
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
325 do_PyThread_exit_prog(status, 0);
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
326 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
327
13658
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diff changeset
328 void PyThread__exit_prog(int status)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
329 {
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
330 do_PyThread_exit_prog(status, 1);
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
331 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
332 #endif /* NO_EXIT_PROG */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
333
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
334 /*
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
335 * Lock support.
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
336 */
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
337 PyThread_type_lock 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
338 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
339 ulock_t lock;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
340
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
341 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
342 if (!initialized)
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
343 PyThread_init_thread();
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
344
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
345 if ((lock = usnewlock(shared_arena)) == NULL)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
346 perror("usnewlock");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
347 (void) usinitlock(lock);
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 9679
diff changeset
348 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: 5405
diff changeset
349 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
350 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
351
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
352 void 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
353 {
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 9679
diff changeset
354 dprintf(("PyThread_free_lock(%p) called\n", lock));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
355 usfreelock((ulock_t) lock, shared_arena);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
356 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
357
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
358 int 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
359 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
360 int success;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
361
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 9679
diff changeset
362 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
363 errno = 0; /* clear it just in case */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
364 if (waitflag)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
365 success = ussetlock((ulock_t) lock);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
366 else
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
367 success = uscsetlock((ulock_t) lock, 1); /* Try it once */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
368 if (success < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
369 perror(waitflag ? "ussetlock" : "uscsetlock");
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 9679
diff changeset
370 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
371 return success;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
372 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
373
13658
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Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
374 void 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
375 {
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 9679
diff changeset
376 dprintf(("PyThread_release_lock(%p) called\n", lock));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
377 if (usunsetlock((ulock_t) lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
378 perror("usunsetlock");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
379 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
380
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
381 /*
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
382 * Per-thread data ("key") support.
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
383 */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
384
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
385 struct key {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
386 struct key *next;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
387 long id;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
388 int key;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
389 void *value;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
390 };
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
391
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
392 static struct key *keyhead = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
393 static int nkeys = 0;
9679
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Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
394 static PyThread_type_lock keymutex = NULL;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4839
diff changeset
395
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396 static struct key *find_key(int key, void *value)
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397 {
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398 struct key *p;
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399 long id = PyThread_get_thread_ident();
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400 for (p = keyhead; p != NULL; p = p->next) {
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401 if (p->id == id && p->key == key)
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402 return p;
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403 }
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404 if (value == NULL)
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405 return NULL;
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406 p = (struct key *)malloc(sizeof(struct key));
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407 if (p != NULL) {
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408 p->id = id;
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409 p->key = key;
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410 p->value = value;
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411 PyThread_acquire_lock(keymutex, 1);
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412 p->next = keyhead;
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413 keyhead = p;
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414 PyThread_release_lock(keymutex);
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415 }
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416 return p;
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417 }
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418
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419 int PyThread_create_key(void)
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420 {
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421 if (keymutex == NULL)
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422 keymutex = PyThread_allocate_lock();
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423 return ++nkeys;
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424 }
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diff changeset
425
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426 void PyThread_delete_key(int key)
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427 {
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428 struct key *p, **q;
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429 PyThread_acquire_lock(keymutex, 1);
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430 q = &keyhead;
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diff changeset
431 while ((p = *q) != NULL) {
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432 if (p->key == key) {
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433 *q = p->next;
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Guido van Rossum <guido@python.org>
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434 free((void *)p);
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435 /* NB This does *not* free p->value! */
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436 }
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Guido van Rossum <guido@python.org>
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437 else
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diff changeset
438 q = &p->next;
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Guido van Rossum <guido@python.org>
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439 }
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diff changeset
440 PyThread_release_lock(keymutex);
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441 }
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diff changeset
442
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parents: 13256
diff changeset
443 int PyThread_set_key_value(int key, void *value)
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diff changeset
444 {
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diff changeset
445 struct key *p = find_key(key, value);
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446 if (p == NULL)
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447 return -1;
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448 else
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449 return 0;
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450 }
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diff changeset
451
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diff changeset
452 void *PyThread_get_key_value(int key)
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diff changeset
453 {
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diff changeset
454 struct key *p = find_key(key, NULL);
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diff changeset
455 if (p == NULL)
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diff changeset
456 return NULL;
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diff changeset
457 else
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diff changeset
458 return p->value;
b7871ca930ad Massive changes for separate thread state management.
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parents: 4839
diff changeset
459 }