Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 1 | #include "thread.h" |
| 2 | |
Sjoerd Mullender | aee8bc1 | 1992-09-02 11:25:37 +0000 | [diff] [blame^] | 3 | <<<<<<< thread.c |
| 4 | #ifndef DEBUG |
| 5 | #define DEBUG |
| 6 | #endif |
| 7 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 8 | #ifdef DEBUG |
| 9 | #define dprintf(args) printf args |
| 10 | #else |
| 11 | #define dprintf(args) |
| 12 | #endif |
| 13 | |
Sjoerd Mullender | aee8bc1 | 1992-09-02 11:25:37 +0000 | [diff] [blame^] | 14 | ======= |
| 15 | #ifdef DEBUG |
| 16 | #define dprintf(args) printf args |
| 17 | #else |
| 18 | #define dprintf(args) |
| 19 | #endif |
| 20 | |
| 21 | >>>>>>> 2.3 |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 22 | #ifdef __sgi |
| 23 | #include <stdlib.h> |
| 24 | #include <stdio.h> |
| 25 | #include <signal.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <sys/prctl.h> |
| 28 | #include <ulocks.h> |
| 29 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 30 | #define MAXPROC 100 /* max # of threads that can be started */ |
| 31 | |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 32 | static usptr_t *shared_arena; |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 33 | static ulock_t count_lock; /* protection for some variables */ |
| 34 | static ulock_t wait_lock; /* lock used to wait for other threads */ |
| 35 | static int waiting_for_threads; /* protected by count_lock */ |
| 36 | static int nthreads; /* protected by count_lock */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 37 | static int exit_status; |
| 38 | static int do_exit; |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 39 | static int exiting; /* we're already exiting (for maybe_exit) */ |
| 40 | static pid_t my_pid; /* PID of main thread */ |
| 41 | static pid_t pidlist[MAXPROC]; /* PIDs of other threads */ |
| 42 | static int maxpidindex; /* # of PIDs in pidlist */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 43 | #endif |
| 44 | #ifdef sun |
| 45 | #include <lwp/lwp.h> |
| 46 | #include <lwp/stackdep.h> |
| 47 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 48 | #define STACKSIZE 1000 /* stacksize for a thread */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 49 | #define NSTACKS 2 /* # stacks to be put in cache initialy */ |
| 50 | |
| 51 | struct lock { |
| 52 | int lock_locked; |
| 53 | cv_t lock_condvar; |
| 54 | mon_t lock_monitor; |
| 55 | }; |
| 56 | #endif |
| 57 | #ifdef C_THREADS |
| 58 | #include <cthreads.h> |
| 59 | #endif |
| 60 | |
| 61 | #ifdef __STDC__ |
| 62 | #define _P(args) args |
| 63 | #define _P0() (void) |
| 64 | #define _P1(v,t) (t) |
| 65 | #define _P2(v1,t1,v2,t2) (t1,t2) |
| 66 | #else |
| 67 | #define _P(args) () |
| 68 | #define _P0() () |
| 69 | #define _P1(v,t) (v) t; |
| 70 | #define _P2(v1,t1,v2,t2) (v1,v2) t1; t2; |
| 71 | #endif |
| 72 | |
| 73 | static int initialized; |
| 74 | |
Sjoerd Mullender | aee8bc1 | 1992-09-02 11:25:37 +0000 | [diff] [blame^] | 75 | <<<<<<< thread.c |
| 76 | #ifdef __sgi |
| 77 | /* |
| 78 | * This routine is called as a signal handler when another thread |
| 79 | * exits. When that happens, we must see whether we have to exit as |
| 80 | * well (because of an exit_prog()) or whether we should continue on. |
| 81 | */ |
| 82 | static void exit_sig _P0() |
| 83 | { |
| 84 | dprintf(("exit_sig called\n")); |
| 85 | if (exiting && getpid() == my_pid) { |
| 86 | dprintf(("already exiting\n")); |
| 87 | return; |
| 88 | } |
| 89 | if (do_exit) { |
| 90 | dprintf(("exiting in exit_sig\n")); |
| 91 | exit_thread(); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | * This routine is called when a process calls exit(). If that wasn't |
| 97 | * done from the library, we do as if an exit_prog() was intended. |
| 98 | */ |
| 99 | static void maybe_exit _P0() |
| 100 | { |
| 101 | dprintf(("maybe_exit called\n")); |
| 102 | if (exiting) { |
| 103 | dprintf(("already exiting\n")); |
| 104 | return; |
| 105 | } |
| 106 | exit_prog(0); |
| 107 | } |
| 108 | #endif |
| 109 | |
| 110 | /* |
| 111 | * Initialization. |
| 112 | */ |
| 113 | void init_thread _P0() |
| 114 | { |
| 115 | #ifdef __sgi |
| 116 | struct sigaction s; |
| 117 | #endif |
| 118 | |
| 119 | dprintf(("init_thread called\n")); |
| 120 | if (initialized) |
| 121 | return; |
| 122 | initialized = 1; |
| 123 | |
| 124 | #ifdef __sgi |
| 125 | my_pid = getpid(); /* so that we know which is the main thread */ |
| 126 | atexit(maybe_exit); |
| 127 | s.sa_handler = exit_sig; |
| 128 | sigemptyset(&s.sa_mask); |
| 129 | sigaddset(&s.sa_mask, SIGUSR1); |
| 130 | s.sa_flags = 0; |
| 131 | sigaction(SIGUSR1, &s, 0); |
| 132 | prctl(PR_SETEXITSIG, SIGUSR1); |
| 133 | usconfig(CONF_ARENATYPE, US_SHAREDONLY); |
| 134 | /*usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);*/ |
| 135 | shared_arena = usinit(tmpnam(0)); |
| 136 | count_lock = usnewlock(shared_arena); |
| 137 | (void) usinitlock(count_lock); |
| 138 | wait_lock = usnewlock(shared_arena); |
| 139 | #endif |
| 140 | #ifdef sun |
| 141 | lwp_setstkcache(STACKSIZE, NSTACKS); |
| 142 | #endif |
| 143 | #ifdef C_THREADS |
| 144 | cthread_init(); |
| 145 | #endif |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Thread support. |
| 150 | */ |
| 151 | ======= |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 152 | #ifdef __sgi |
| 153 | /* |
| 154 | * This routine is called as a signal handler when another thread |
| 155 | * exits. When that happens, we must see whether we have to exit as |
| 156 | * well (because of an exit_prog()) or whether we should continue on. |
| 157 | */ |
| 158 | static void exit_sig _P0() |
| 159 | { |
| 160 | dprintf(("exit_sig called\n")); |
| 161 | if (exiting && getpid() == my_pid) { |
| 162 | dprintf(("already exiting\n")); |
| 163 | return; |
| 164 | } |
| 165 | if (do_exit) { |
| 166 | dprintf(("exiting in exit_sig\n")); |
| 167 | exit_thread(); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * This routune is called when a process calls exit(). If that wasn't |
| 173 | * done from the library, we do as if an exit_prog() was intended. |
| 174 | */ |
| 175 | static void maybe_exit _P0() |
| 176 | { |
| 177 | dprintf(("maybe_exit called\n")); |
| 178 | if (exiting) { |
| 179 | dprintf(("already exiting\n")); |
| 180 | return; |
| 181 | } |
| 182 | exit_prog(0); |
| 183 | } |
| 184 | #endif |
| 185 | |
| 186 | /* |
| 187 | * Initialization. |
| 188 | */ |
| 189 | void init_thread _P0() |
| 190 | { |
| 191 | #ifdef __sgi |
| 192 | struct sigaction s; |
| 193 | #endif |
| 194 | |
| 195 | dprintf(("init_thread called\n")); |
| 196 | if (initialized) |
| 197 | return; |
| 198 | initialized = 1; |
| 199 | |
| 200 | #ifdef __sgi |
| 201 | my_pid = getpid(); /* so that we know which is the main thread */ |
| 202 | atexit(maybe_exit); |
| 203 | s.sa_handler = exit_sig; |
| 204 | sigemptyset(&s.sa_mask); |
| 205 | sigaddset(&s.sa_mask, SIGUSR1); |
| 206 | s.sa_flags = 0; |
| 207 | sigaction(SIGUSR1, &s, 0); |
| 208 | prctl(PR_SETEXITSIG, SIGUSR1); |
| 209 | usconfig(CONF_ARENATYPE, US_SHAREDONLY); |
| 210 | /*usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);*/ |
| 211 | shared_arena = usinit(tmpnam(0)); |
| 212 | count_lock = usnewlock(shared_arena); |
| 213 | (void) usinitlock(count_lock); |
| 214 | wait_lock = usnewlock(shared_arena); |
| 215 | #endif |
| 216 | #ifdef sun |
| 217 | lwp_setstkcache(STACKSIZE, NSTACKS); |
| 218 | #endif |
| 219 | #ifdef C_THREADS |
| 220 | cthread_init(); |
| 221 | #endif |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * Thread support. |
| 226 | */ |
Sjoerd Mullender | aee8bc1 | 1992-09-02 11:25:37 +0000 | [diff] [blame^] | 227 | >>>>>>> 2.3 |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 228 | int start_new_thread _P2(func, void (*func) _P((void *)), arg, void *arg) |
| 229 | { |
| 230 | #ifdef sun |
| 231 | thread_t tid; |
| 232 | #endif |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 233 | int success = 0; /* init not needed when SOLARIS and */ |
| 234 | /* C_THREADS implemented properly */ |
| 235 | |
| 236 | dprintf(("start_new_thread called\n")); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 237 | if (!initialized) |
| 238 | init_thread(); |
| 239 | #ifdef __sgi |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 240 | if (ussetlock(count_lock) == 0) |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 241 | return 0; |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 242 | if (maxpidindex >= MAXPROC) |
| 243 | success = -1; |
| 244 | else { |
| 245 | success = sproc(func, PR_SALL, arg); |
| 246 | if (success >= 0) { |
| 247 | nthreads++; |
| 248 | pidlist[maxpidindex++] = success; |
| 249 | } |
| 250 | } |
| 251 | (void) usunsetlock(count_lock); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 252 | #endif |
| 253 | #ifdef SOLARIS |
| 254 | (void) thread_create(0, 0, func, arg, THREAD_NEW_LWP); |
| 255 | #endif |
| 256 | #ifdef sun |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 257 | success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 258 | #endif |
| 259 | #ifdef C_THREADS |
| 260 | (void) cthread_fork(func, arg); |
| 261 | #endif |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 262 | return success < 0 ? 0 : 1; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 263 | } |
| 264 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 265 | static void do_exit_thread _P1(no_cleanup, int no_cleanup) |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 266 | { |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 267 | dprintf(("exit_thread called\n")); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 268 | if (!initialized) |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 269 | if (no_cleanup) |
| 270 | _exit(0); |
| 271 | else |
| 272 | exit(0); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 273 | #ifdef __sgi |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 274 | (void) ussetlock(count_lock); |
| 275 | nthreads--; |
| 276 | if (getpid() == my_pid) { |
| 277 | /* main thread; wait for other threads to exit */ |
| 278 | exiting = 1; |
| 279 | if (do_exit) { |
| 280 | int i; |
| 281 | |
| 282 | /* notify other threads */ |
| 283 | for (i = 0; i < maxpidindex; i++) |
| 284 | (void) kill(pidlist[i], SIGUSR1); |
| 285 | } |
| 286 | waiting_for_threads = 1; |
| 287 | ussetlock(wait_lock); |
| 288 | for (;;) { |
| 289 | if (nthreads < 0) { |
| 290 | dprintf(("really exit (%d)\n", exit_status)); |
| 291 | if (no_cleanup) |
| 292 | _exit(exit_status); |
| 293 | else |
| 294 | exit(exit_status); |
| 295 | } |
| 296 | usunsetlock(count_lock); |
| 297 | dprintf(("waiting for other threads (%d)\n", nthreads)); |
| 298 | ussetlock(wait_lock); |
| 299 | ussetlock(count_lock); |
| 300 | } |
| 301 | } |
| 302 | /* not the main thread */ |
| 303 | if (waiting_for_threads) { |
| 304 | dprintf(("main thread is waiting\n")); |
| 305 | usunsetlock(wait_lock); |
| 306 | } |
| 307 | (void) usunsetlock(count_lock); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 308 | _exit(0); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 309 | #endif |
| 310 | #ifdef SOLARIS |
| 311 | thread_exit(); |
| 312 | #endif |
| 313 | #ifdef sun |
| 314 | lwp_destroy(SELF); |
| 315 | #endif |
| 316 | #ifdef C_THREADS |
| 317 | cthread_exit(0); |
| 318 | #endif |
| 319 | } |
| 320 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 321 | void exit_thread _P0() |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 322 | { |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 323 | do_exit_thread(0); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 324 | } |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 325 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 326 | void _exit_thread _P0() |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 327 | { |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 328 | do_exit_thread(1); |
| 329 | } |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 330 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 331 | static void do_exit_prog _P2(status, int status, no_cleanup, int no_cleanup) |
| 332 | { |
| 333 | dprintf(("exit_prog(%d) called\n", status)); |
| 334 | if (!initialized) |
| 335 | if (no_cleanup) |
| 336 | _exit(status); |
| 337 | else |
| 338 | exit(status); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 339 | #ifdef __sgi |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 340 | do_exit = 1; |
| 341 | exit_status = status; |
| 342 | do_exit_thread(no_cleanup); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 343 | #endif |
| 344 | #ifdef sun |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 345 | pod_exit(status); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 346 | #endif |
| 347 | } |
| 348 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 349 | void exit_prog _P1(status, int status) |
| 350 | { |
| 351 | do_exit_prog(status, 0); |
| 352 | } |
| 353 | |
| 354 | void _exit_prog _P1(status, int status) |
| 355 | { |
| 356 | do_exit_prog(status, 1); |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * Lock support. |
| 361 | */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 362 | type_lock allocate_lock _P0() |
| 363 | { |
| 364 | #ifdef __sgi |
| 365 | ulock_t lock; |
| 366 | #endif |
| 367 | #ifdef sun |
| 368 | struct lock *lock; |
| 369 | extern char *malloc(); |
| 370 | #endif |
| 371 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 372 | dprintf(("allocate_lock called\n")); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 373 | if (!initialized) |
| 374 | init_thread(); |
| 375 | |
| 376 | #ifdef __sgi |
| 377 | lock = usnewlock(shared_arena); |
| 378 | (void) usinitlock(lock); |
| 379 | #endif |
| 380 | #ifdef sun |
| 381 | lock = (struct lock *) malloc(sizeof(struct lock)); |
| 382 | lock->lock_locked = 0; |
| 383 | (void) mon_create(&lock->lock_monitor); |
| 384 | (void) cv_create(&lock->lock_condvar, lock->lock_monitor); |
| 385 | #endif |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 386 | dprintf(("allocate_lock() -> %lx\n", (long)lock)); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 387 | return (type_lock) lock; |
| 388 | } |
| 389 | |
| 390 | void free_lock _P1(lock, type_lock lock) |
| 391 | { |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 392 | dprintf(("free_lock(%lx) called\n", (long)lock)); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 393 | #ifdef __sgi |
| 394 | usfreelock((ulock_t) lock, shared_arena); |
| 395 | #endif |
| 396 | #ifdef sun |
| 397 | mon_destroy(((struct lock *) lock)->lock_monitor); |
| 398 | free((char *) lock); |
| 399 | #endif |
| 400 | } |
| 401 | |
| 402 | int acquire_lock _P2(lock, type_lock lock, waitflag, int waitflag) |
| 403 | { |
| 404 | int success; |
| 405 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 406 | dprintf(("acquire_lock(%lx, %d) called\n", (long)lock, waitflag)); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 407 | #ifdef __sgi |
| 408 | if (waitflag) |
| 409 | success = ussetlock((ulock_t) lock); |
| 410 | else |
| 411 | success = uscsetlock((ulock_t) lock, 1); /* Try it once */ |
| 412 | #endif |
| 413 | #ifdef sun |
| 414 | success = 0; |
| 415 | |
| 416 | (void) mon_enter(((struct lock *) lock)->lock_monitor); |
| 417 | if (waitflag) |
| 418 | while (((struct lock *) lock)->lock_locked) |
| 419 | cv_wait(((struct lock *) lock)->lock_condvar); |
| 420 | if (!((struct lock *) lock)->lock_locked) { |
| 421 | success = 1; |
| 422 | ((struct lock *) lock)->lock_locked = 1; |
| 423 | } |
| 424 | cv_broadcast(((struct lock *) lock)->lock_condvar); |
| 425 | mon_exit(((struct lock *) lock)->lock_monitor); |
| 426 | #endif |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 427 | dprintf(("acquire_lock(%lx, %d) -> %d\n", (long)lock, waitflag, success)); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 428 | return success; |
| 429 | } |
| 430 | |
| 431 | void release_lock _P1(lock, type_lock lock) |
| 432 | { |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 433 | dprintf(("release_lock(%lx) called\n", (long)lock)); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 434 | #ifdef __sgi |
| 435 | (void) usunsetlock((ulock_t) lock); |
| 436 | #endif |
| 437 | #ifdef sun |
| 438 | (void) mon_enter(((struct lock *) lock)->lock_monitor); |
| 439 | ((struct lock *) lock)->lock_locked = 0; |
| 440 | cv_broadcast(((struct lock *) lock)->lock_condvar); |
| 441 | mon_exit(((struct lock *) lock)->lock_monitor); |
| 442 | #endif |
| 443 | } |
| 444 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 445 | /* |
| 446 | * Semaphore support. |
| 447 | */ |
| 448 | type_sema allocate_sema _P1(value, int value) |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 449 | { |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 450 | #ifdef __sgi |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 451 | usema_t *sema; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 452 | #endif |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 453 | |
| 454 | dprintf(("allocate_sema called\n")); |
| 455 | |
| 456 | #ifdef __sgi |
| 457 | sema = usnewsema(shared_arena, value); |
| 458 | dprintf(("allocate_sema() -> %lx\n", (long) sema)); |
| 459 | return (type_sema) sema; |
| 460 | #endif |
| 461 | } |
| 462 | |
| 463 | void free_sema _P1(sema, type_sema sema) |
| 464 | { |
| 465 | dprintf(("free_sema(%lx) called\n", (long) sema)); |
| 466 | #ifdef __sgi |
| 467 | usfreesema((usema_t *) sema, shared_arena); |
| 468 | #endif |
| 469 | } |
| 470 | |
| 471 | void down_sema _P1(sema, type_sema sema) |
| 472 | { |
| 473 | dprintf(("down_sema(%lx) called\n", (long) sema)); |
| 474 | #ifdef __sgi |
| 475 | (void) uspsema((usema_t *) sema); |
| 476 | #endif |
| 477 | dprintf(("down_sema(%lx) return\n", (long) sema)); |
| 478 | } |
| 479 | |
| 480 | void up_sema _P1(sema, type_sema sema) |
| 481 | { |
| 482 | dprintf(("up_sema(%lx)\n", (long) sema)); |
| 483 | #ifdef __sgi |
| 484 | (void) usvsema((usema_t *) sema); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 485 | #endif |
| 486 | } |