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annotate Python/thread_sgi.h @ 4371:c277ee8c669c legacy-trunk

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Sjoerd's thread changes (including down_sema typo fix). Note: waitflag not supported on NT.
author Guido van Rossum <guido@python.org>
date Tue, 08 Oct 1996 14:17:53 +0000
parents d0d0a69b5ca3
children 65d2d8e67da3
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1 /***********************************************************
2062
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
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25 #ifdef WITH_SGI_DL
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26 #define USE_DL
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27 #endif
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28
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29 #include <stdlib.h>
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30 #include <stdio.h>
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31 #include <signal.h>
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32 #include <sys/types.h>
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33 #include <sys/wait.h>
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34 #include <sys/prctl.h>
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35 #include <ulocks.h>
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36 #include <errno.h>
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37
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38 #define HDR_SIZE 2680 /* sizeof(ushdr_t) */
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39 #define MAXPROC 100 /* max # of threads that can be started */
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40
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41 static usptr_t *shared_arena;
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42 static ulock_t count_lock; /* protection for some variables */
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43 static ulock_t wait_lock; /* lock used to wait for other threads */
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44 static int waiting_for_threads; /* protected by count_lock */
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45 static int nthreads; /* protected by count_lock */
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46 static int exit_status;
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47 #ifndef NO_EXIT_PROG
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48 static int do_exit; /* indicates that the program is to exit */
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49 #endif
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50 static int exiting; /* we're already exiting (for maybe_exit) */
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51 static pid_t my_pid; /* PID of main thread */
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52 static struct pidlist {
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53 pid_t parent;
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54 pid_t child;
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55 } pidlist[MAXPROC]; /* PIDs of other threads; protected by count_lock */
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56 static int maxpidindex; /* # of PIDs in pidlist */
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57
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58 #ifndef NO_EXIT_PROG
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59 /*
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60 * This routine is called as a signal handler when another thread
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61 * exits. When that happens, we must see whether we have to exit as
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62 * well (because of an exit_prog()) or whether we should continue on.
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63 */
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64 static void exit_sig _P0()
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65 {
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66 d2printf(("exit_sig called\n"));
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67 if (exiting && getpid() == my_pid) {
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68 d2printf(("already exiting\n"));
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69 return;
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70 }
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71 if (do_exit) {
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72 d2printf(("exiting in exit_sig\n"));
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73 #ifdef DEBUG
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74 if ((thread_debug & 8) == 0)
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75 thread_debug &= ~1; /* don't produce debug messages */
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76 #endif
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77 exit_thread();
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78 }
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79 }
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80
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81 /*
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82 * This routine is called when a process calls exit(). If that wasn't
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83 * done from the library, we do as if an exit_prog() was intended.
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84 */
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85 static void maybe_exit _P0()
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86 {
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87 dprintf(("maybe_exit called\n"));
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88 if (exiting) {
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89 dprintf(("already exiting\n"));
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90 return;
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91 }
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92 exit_prog(0);
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93 }
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94 #endif /* NO_EXIT_PROG */
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95
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96 /*
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97 * Initialization.
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98 */
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99 static void _init_thread _P0()
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100 {
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101 #ifndef NO_EXIT_PROG
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102 struct sigaction s;
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103 #endif /* NO_EXIT_PROG */
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104 #ifdef USE_DL
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105 long addr, size;
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106 #endif /* USE_DL */
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107
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108
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109 #ifdef USE_DL
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110 if ((size = usconfig(CONF_INITSIZE, 64*1024)) < 0)
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111 perror("usconfig - CONF_INITSIZE (check)");
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112 if (usconfig(CONF_INITSIZE, size) < 0)
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113 perror("usconfig - CONF_INITSIZE (reset)");
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114 addr = (long) dl_getrange(size + HDR_SIZE);
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115 dprintf(("trying to use addr %lx-%lx for shared arena\n", addr, addr+size));
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116 errno = 0;
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117 if ((addr = usconfig(CONF_ATTACHADDR, addr)) < 0 && errno != 0)
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118 perror("usconfig - CONF_ATTACHADDR (set)");
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119 #endif /* USE_DL */
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120 if (usconfig(CONF_INITUSERS, 16) < 0)
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121 perror("usconfig - CONF_INITUSERS");
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122 my_pid = getpid(); /* so that we know which is the main thread */
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123 #ifndef NO_EXIT_PROG
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124 atexit(maybe_exit);
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125 s.sa_handler = exit_sig;
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126 sigemptyset(&s.sa_mask);
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127 /*sigaddset(&s.sa_mask, SIGUSR1);*/
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128 s.sa_flags = 0;
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129 sigaction(SIGUSR1, &s, 0);
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130 if (prctl(PR_SETEXITSIG, SIGUSR1) < 0)
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131 perror("prctl - PR_SETEXITSIG");
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132 #endif /* NO_EXIT_PROG */
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133 if (usconfig(CONF_ARENATYPE, US_SHAREDONLY) < 0)
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134 perror("usconfig - CONF_ARENATYPE");
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135 usconfig(CONF_LOCKTYPE, US_DEBUG); /* XXX */
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136 #ifdef DEBUG
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137 if (thread_debug & 4)
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138 usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);
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139 else if (thread_debug & 2)
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140 usconfig(CONF_LOCKTYPE, US_DEBUG);
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diff changeset
141 #endif /* DEBUG */
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142 if ((shared_arena = usinit(tmpnam(0))) == 0)
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143 perror("usinit");
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144 #ifdef USE_DL
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145 if (usconfig(CONF_ATTACHADDR, addr) < 0) /* reset address */
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146 perror("usconfig - CONF_ATTACHADDR (reset)");
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147 #endif /* USE_DL */
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148 if ((count_lock = usnewlock(shared_arena)) == NULL)
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149 perror("usnewlock (count_lock)");
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150 (void) usinitlock(count_lock);
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151 if ((wait_lock = usnewlock(shared_arena)) == NULL)
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152 perror("usnewlock (wait_lock)");
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153 dprintf(("arena start: %lx, arena size: %ld\n", (long) shared_arena, (long) usconfig(CONF_GETSIZE, shared_arena)));
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154 }
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155
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156 /*
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157 * Thread support.
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158 */
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159
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160 static void clean_threads _P0()
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161 {
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162 int i, j;
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163 pid_t mypid, pid;
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164
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165 /* clean up any exited threads */
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166 mypid = getpid();
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167 i = 0;
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168 while (i < maxpidindex) {
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169 if (pidlist[i].parent == mypid && (pid = pidlist[i].child) > 0) {
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170 pid = waitpid(pid, 0, WNOHANG);
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171 if (pid > 0) {
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172 /* a thread has exited */
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173 pidlist[i] = pidlist[--maxpidindex];
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174 /* remove references to children of dead proc */
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175 for (j = 0; j < maxpidindex; j++)
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176 if (pidlist[j].parent == pid)
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177 pidlist[j].child = -1;
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178 continue; /* don't increment i */
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179 }
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180 }
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181 i++;
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182 }
1655
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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183 /* clean up the list */
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diff changeset
184 i = 0;
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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185 while (i < maxpidindex) {
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
186 if (pidlist[i].child == -1) {
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
187 pidlist[i] = pidlist[--maxpidindex];
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diff changeset
188 continue; /* don't increment i */
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
189 }
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
190 i++;
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diff changeset
191 }
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192 }
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193
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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194 int start_new_thread _P2(func, void (*func) _P((void *)), arg, void *arg)
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195 {
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196 #ifdef USE_DL
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197 long addr, size;
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198 static int local_initialized = 0;
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199 #endif /* USE_DL */
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200 int success = 0; /* init not needed when SOLARIS_THREADS and */
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201 /* C_THREADS implemented properly */
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202
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203 dprintf(("start_new_thread called\n"));
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diff changeset
204 if (!initialized)
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diff changeset
205 init_thread();
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diff changeset
206 switch (ussetlock(count_lock)) {
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diff changeset
207 case 0: return 0;
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208 case -1: perror("ussetlock (count_lock)");
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diff changeset
209 }
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diff changeset
210 if (maxpidindex >= MAXPROC)
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diff changeset
211 success = -1;
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diff changeset
212 else {
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diff changeset
213 #ifdef USE_DL
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diff changeset
214 if (!local_initialized) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
215 if ((size = usconfig(CONF_INITSIZE, 64*1024)) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
216 perror("usconfig - CONF_INITSIZE (check)");
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parents:
diff changeset
217 if (usconfig(CONF_INITSIZE, size) < 0)
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parents:
diff changeset
218 perror("usconfig - CONF_INITSIZE (reset)");
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diff changeset
219 addr = (long) dl_getrange(size + HDR_SIZE);
1655
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
220 dprintf(("trying to use addr %lx-%lx for sproc\n",
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
221 addr, addr+size));
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
222 errno = 0;
1655
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
223 if ((addr = usconfig(CONF_ATTACHADDR, addr)) < 0 &&
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
Guido van Rossum <guido@python.org>
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diff changeset
224 errno != 0)
1628
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
225 perror("usconfig - CONF_ATTACHADDR (set)");
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diff changeset
226 }
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diff changeset
227 #endif /* USE_DL */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
228 clean_threads();
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diff changeset
229 if ((success = sproc(func, PR_SALL, arg)) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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parents:
diff changeset
230 perror("sproc");
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diff changeset
231 #ifdef USE_DL
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diff changeset
232 if (!local_initialized) {
1655
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diff changeset
233 if (usconfig(CONF_ATTACHADDR, addr) < 0)
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
234 /* reset address */
1628
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diff changeset
235 perror("usconfig - CONF_ATTACHADDR (reset)");
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diff changeset
236 local_initialized = 1;
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diff changeset
237 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
238 #endif /* USE_DL */
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diff changeset
239 if (success >= 0) {
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diff changeset
240 nthreads++;
1655
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diff changeset
241 pidlist[maxpidindex].parent = getpid();
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
242 pidlist[maxpidindex++].child = success;
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
243 dprintf(("pidlist[%d] = %d\n",
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
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diff changeset
244 maxpidindex-1, success));
1628
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diff changeset
245 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
246 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
247 if (usunsetlock(count_lock) < 0)
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diff changeset
248 perror("usunsetlock (count_lock)");
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diff changeset
249 return success < 0 ? 0 : 1;
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diff changeset
250 }
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diff changeset
251
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diff changeset
252 long get_thread_ident _P0()
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diff changeset
253 {
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
254 return getpid();
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
255 }
7e5f97bab1e6 ceval.c: dict of local mapping is now a tuple
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diff changeset
256
1628
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257 static void do_exit_thread _P1(no_cleanup, int no_cleanup)
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diff changeset
258 {
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diff changeset
259 dprintf(("exit_thread called\n"));
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diff changeset
260 if (!initialized)
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diff changeset
261 if (no_cleanup)
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diff changeset
262 _exit(0);
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diff changeset
263 else
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
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diff changeset
264 exit(0);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
265 if (ussetlock(count_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
266 perror("ussetlock (count_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
267 nthreads--;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
268 if (getpid() == my_pid) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
269 /* main thread; wait for other threads to exit */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
270 exiting = 1;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
271 #ifndef NO_EXIT_PROG
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
272 if (do_exit) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
273 int i;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
274
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
275 /* notify other threads */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
276 clean_threads();
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
277 if (nthreads >= 0) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
278 dprintf(("kill other threads\n"));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
279 for (i = 0; i < maxpidindex; i++)
1655
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
Guido van Rossum <guido@python.org>
parents: 1651
diff changeset
280 if (pidlist[i].child > 0)
90ee71a3a13e Fix waiting for children -- save ppid in pidlist as well.
Guido van Rossum <guido@python.org>
parents: 1651
diff changeset
281 (void) kill(pidlist[i].child,
1628
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Guido van Rossum <guido@python.org>
parents:
diff changeset
282 SIGKILL);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
283 _exit(exit_status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
284 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
285 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
286 #endif /* NO_EXIT_PROG */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
287 waiting_for_threads = 1;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
288 if (ussetlock(wait_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
289 perror("ussetlock (wait_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
290 for (;;) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
291 if (nthreads < 0) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
292 dprintf(("really exit (%d)\n", exit_status));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
293 if (no_cleanup)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
294 _exit(exit_status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
295 else
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
296 exit(exit_status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
297 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
298 if (usunsetlock(count_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
299 perror("usunsetlock (count_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
300 dprintf(("waiting for other threads (%d)\n", nthreads));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
301 if (ussetlock(wait_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
302 perror("ussetlock (wait_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
303 if (ussetlock(count_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
304 perror("ussetlock (count_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
305 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
306 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
307 /* not the main thread */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
308 if (waiting_for_threads) {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
309 dprintf(("main thread is waiting\n"));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
310 if (usunsetlock(wait_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
311 perror("usunsetlock (wait_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
312 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
313 #ifndef NO_EXIT_PROG
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
314 else if (do_exit)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
315 (void) kill(my_pid, SIGUSR1);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
316 #endif /* NO_EXIT_PROG */
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
317 if (usunsetlock(count_lock) < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
318 perror("usunsetlock (count_lock)");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
319 _exit(0);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
320 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
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 void exit_thread _P0()
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
323 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
324 do_exit_thread(0);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
325 }
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 void _exit_thread _P0()
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
328 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
329 do_exit_thread(1);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
330 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
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 #ifndef NO_EXIT_PROG
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
333 static void do_exit_prog _P2(status, int status, no_cleanup, int no_cleanup)
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 dprintf(("exit_prog(%d) called\n", status));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
336 if (!initialized)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
337 if (no_cleanup)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
338 _exit(status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
339 else
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
340 exit(status);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
341 do_exit = 1;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
342 exit_status = status;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
343 do_exit_thread(no_cleanup);
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
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
346 void exit_prog _P1(status, int status)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
347 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
348 do_exit_prog(status, 0);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
349 }
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 void _exit_prog _P1(status, int status)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
352 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
353 do_exit_prog(status, 1);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
354 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
355 #endif /* NO_EXIT_PROG */
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 /*
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
358 * Lock support.
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 type_lock allocate_lock _P0()
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
361 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
362 ulock_t lock;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
363
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
364 dprintf(("allocate_lock called\n"));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
365 if (!initialized)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
366 init_thread();
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
367
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
368 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
369 perror("usnewlock");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
370 (void) usinitlock(lock);
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
371 dprintf(("allocate_lock() -> %lx\n", (long)lock));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
372 return (type_lock) lock;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
373 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
374
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
375 void free_lock _P1(lock, type_lock lock)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
376 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
377 dprintf(("free_lock(%lx) called\n", (long)lock));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
378 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
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 int acquire_lock _P2(lock, type_lock lock, waitflag, int waitflag)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
382 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
383 int success;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
384
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
385 dprintf(("acquire_lock(%lx, %d) called\n", (long)lock, waitflag));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
386 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
387 if (waitflag)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
388 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
389 else
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
390 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
391 if (success < 0)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
392 perror(waitflag ? "ussetlock" : "uscsetlock");
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
393 dprintf(("acquire_lock(%lx, %d) -> %d\n", (long)lock, waitflag, success));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
394 return success;
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
395 }
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
396
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
397 void release_lock _P1(lock, type_lock lock)
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
398 {
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
399 dprintf(("release_lock(%lx) called\n", (long)lock));
a9dd2e1ea5c9 Split thread.c into a number of system-specific files.
Guido van Rossum <guido@python.org>
parents:
diff changeset
400 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
401 perror("usunsetlock");
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402 }
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403
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404 /*
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405 * Semaphore support.
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406 */
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407 type_sema allocate_sema _P1(value, int value)
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408 {
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409 usema_t *sema;
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410 dprintf(("allocate_sema called\n"));
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411 if (!initialized)
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412 init_thread();
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413
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414 if ((sema = usnewsema(shared_arena, value)) == NULL)
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415 perror("usnewsema");
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416 dprintf(("allocate_sema() -> %lx\n", (long) sema));
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417 return (type_sema) sema;
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418 }
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419
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420 void free_sema _P1(sema, type_sema sema)
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421 {
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422 dprintf(("free_sema(%lx) called\n", (long) sema));
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423 usfreesema((usema_t *) sema, shared_arena);
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424 }
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425
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426 int down_sema _P2(sema, type_sema sema, waitflag, int waitflag)
1628
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427 {
4371
c277ee8c669c Sjoerd's thread changes (including down_sema typo fix).
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428 int success;
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429
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430 dprintf(("down_sema(%lx) called\n", (long) sema));
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431 if (waitflag)
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432 success = uspsema((usema_t *) sema);
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433 else
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434 success = uscpsema((usema_t *) sema);
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435 if (success < 0)
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436 perror(waitflag ? "uspsema" : "uscpsema");
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437 dprintf(("down_sema(%lx) return\n", (long) sema));
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438 return success;
1628
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439 }
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440
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441 void up_sema _P1(sema, type_sema sema)
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442 {
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443 dprintf(("up_sema(%lx)\n", (long) sema));
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444 if (usvsema((usema_t *) sema) < 0)
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445 perror("usvsema");
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446 }