Commit | Line | Data |
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38466059 | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
7bfd3b9e | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
7bfd3b9e | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
7bfd3b9e | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
7bfd3b9e JB |
19 | \f |
20 | ||
9de87eea | 21 | #define _GNU_SOURCE |
76da80e7 | 22 | |
1810dc4e RB |
23 | #include "libguile/_scm.h" |
24 | ||
fcc5d734 | 25 | #if HAVE_UNISTD_H |
d823b11b | 26 | #include <unistd.h> |
fcc5d734 | 27 | #endif |
d823b11b MV |
28 | #include <stdio.h> |
29 | #include <assert.h> | |
fcc5d734 | 30 | #if HAVE_SYS_TIME_H |
d823b11b | 31 | #include <sys/time.h> |
fcc5d734 | 32 | #endif |
5f05c406 | 33 | |
d823b11b MV |
34 | #include "libguile/validate.h" |
35 | #include "libguile/root.h" | |
36 | #include "libguile/eval.h" | |
37 | #include "libguile/async.h" | |
38 | #include "libguile/ports.h" | |
39 | #include "libguile/threads.h" | |
a0599745 | 40 | #include "libguile/dynwind.h" |
d823b11b | 41 | #include "libguile/iselect.h" |
9de87eea MV |
42 | #include "libguile/fluids.h" |
43 | #include "libguile/continuations.h" | |
44 | #include "libguile/init.h" | |
7bfd3b9e | 45 | |
d823b11b | 46 | /*** Queues */ |
7bfd3b9e | 47 | |
9de87eea MV |
48 | /* Make an empty queue data structure. |
49 | */ | |
d823b11b MV |
50 | static SCM |
51 | make_queue () | |
52 | { | |
53 | return scm_cons (SCM_EOL, SCM_EOL); | |
54 | } | |
7bfd3b9e | 55 | |
9de87eea MV |
56 | /* Put T at the back of Q and return a handle that can be used with |
57 | remqueue to remove T from Q again. | |
58 | */ | |
d823b11b MV |
59 | static SCM |
60 | enqueue (SCM q, SCM t) | |
61 | { | |
62 | SCM c = scm_cons (t, SCM_EOL); | |
d2e53ed6 | 63 | if (scm_is_null (SCM_CDR (q))) |
d823b11b MV |
64 | SCM_SETCDR (q, c); |
65 | else | |
66 | SCM_SETCDR (SCM_CAR (q), c); | |
67 | SCM_SETCAR (q, c); | |
68 | return c; | |
69 | } | |
7bfd3b9e | 70 | |
9de87eea MV |
71 | /* Remove the element that the handle C refers to from the queue Q. C |
72 | must have been returned from a call to enqueue. The return value | |
73 | is zero when the element referred to by C has already been removed. | |
74 | Otherwise, 1 is returned. | |
75 | */ | |
76 | static int | |
d823b11b MV |
77 | remqueue (SCM q, SCM c) |
78 | { | |
79 | SCM p, prev = q; | |
d2e53ed6 | 80 | for (p = SCM_CDR (q); !scm_is_null (p); p = SCM_CDR (p)) |
d823b11b | 81 | { |
bc36d050 | 82 | if (scm_is_eq (p, c)) |
d823b11b | 83 | { |
bc36d050 | 84 | if (scm_is_eq (c, SCM_CAR (q))) |
d823b11b MV |
85 | SCM_SETCAR (q, SCM_CDR (c)); |
86 | SCM_SETCDR (prev, SCM_CDR (c)); | |
9de87eea | 87 | return 1; |
d823b11b MV |
88 | } |
89 | prev = p; | |
90 | } | |
9de87eea | 91 | return 0; |
d823b11b MV |
92 | } |
93 | ||
9de87eea MV |
94 | /* Remove the front-most element from the queue Q and return it. |
95 | Return SCM_BOOL_F when Q is empty. | |
96 | */ | |
d823b11b MV |
97 | static SCM |
98 | dequeue (SCM q) | |
99 | { | |
100 | SCM c = SCM_CDR (q); | |
d2e53ed6 | 101 | if (scm_is_null (c)) |
d823b11b MV |
102 | return SCM_BOOL_F; |
103 | else | |
104 | { | |
105 | SCM_SETCDR (q, SCM_CDR (c)); | |
d2e53ed6 | 106 | if (scm_is_null (SCM_CDR (q))) |
d823b11b MV |
107 | SCM_SETCAR (q, SCM_EOL); |
108 | return SCM_CAR (c); | |
109 | } | |
110 | } | |
7bfd3b9e | 111 | |
9de87eea | 112 | /*** Thread smob routines */ |
76da80e7 | 113 | |
d823b11b MV |
114 | static SCM |
115 | thread_mark (SCM obj) | |
116 | { | |
9de87eea | 117 | scm_i_thread *t = SCM_I_THREAD_DATA (obj); |
d823b11b | 118 | scm_gc_mark (t->result); |
9de87eea MV |
119 | scm_gc_mark (t->join_queue); |
120 | scm_gc_mark (t->dynwinds); | |
121 | scm_gc_mark (t->active_asyncs); | |
122 | scm_gc_mark (t->signal_asyncs); | |
123 | scm_gc_mark (t->continuation_root); | |
124 | return t->dynamic_state; | |
d823b11b MV |
125 | } |
126 | ||
127 | static int | |
128 | thread_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) | |
129 | { | |
9de87eea | 130 | scm_i_thread *t = SCM_I_THREAD_DATA (exp); |
d823b11b | 131 | scm_puts ("#<thread ", port); |
9de87eea | 132 | scm_uintprint ((size_t)t->pthread, 10, port); |
1b92fb6b | 133 | scm_puts (" (", port); |
0345e278 | 134 | scm_uintprint ((scm_t_bits)t, 16, port); |
1b92fb6b | 135 | scm_puts (")>", port); |
d823b11b MV |
136 | return 1; |
137 | } | |
138 | ||
139 | static size_t | |
140 | thread_free (SCM obj) | |
141 | { | |
9de87eea MV |
142 | scm_i_thread *t = SCM_I_THREAD_DATA (obj); |
143 | assert (t->exited); | |
d823b11b MV |
144 | scm_gc_free (t, sizeof (*t), "thread"); |
145 | return 0; | |
146 | } | |
147 | ||
9de87eea | 148 | /*** Blocking on queues. */ |
f7eca35d | 149 | |
9de87eea MV |
150 | /* See also scm_i_queue_async_cell for how such a block is |
151 | interrputed. | |
152 | */ | |
d823b11b | 153 | |
9de87eea MV |
154 | /* Put the current thread on QUEUE and go to sleep, waiting for it to |
155 | be woken up by a call to 'unblock_from_queue', or to be | |
156 | interrupted. Upon return of this function, the current thread is | |
157 | no longer on QUEUE, even when the sleep has been interrupted. | |
158 | ||
159 | The QUEUE data structure is assumed to be protected by MUTEX and | |
160 | the caller of block_self must hold MUTEX. It will be atomically | |
161 | unlocked while sleeping, just as with scm_i_pthread_cond_wait. | |
162 | ||
163 | SLEEP_OBJECT is an arbitrary SCM value that is kept alive as long | |
164 | as MUTEX is needed. | |
165 | ||
166 | When WAITTIME is not NULL, the sleep will be aborted at that time. | |
167 | ||
168 | The return value of block_self is an errno value. It will be zero | |
169 | when the sleep has been successfully completed by a call to | |
170 | unblock_from_queue, EINTR when it has been interrupted by the | |
171 | delivery of a system async, and ETIMEDOUT when the timeout has | |
172 | expired. | |
173 | ||
174 | The system asyncs themselves are not executed by block_self. | |
175 | */ | |
176 | static int | |
177 | block_self (SCM queue, SCM sleep_object, scm_i_pthread_mutex_t *mutex, | |
178 | const scm_t_timespec *waittime) | |
76da80e7 | 179 | { |
9de87eea MV |
180 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
181 | SCM q_handle; | |
182 | int err; | |
183 | ||
184 | if (scm_i_setup_sleep (t, sleep_object, mutex, -1)) | |
185 | err = EINTR; | |
186 | else | |
187 | { | |
188 | t->block_asyncs++; | |
189 | q_handle = enqueue (queue, t->handle); | |
190 | if (waittime == NULL) | |
191 | err = scm_i_scm_pthread_cond_wait (&t->sleep_cond, mutex); | |
192 | else | |
193 | err = scm_i_scm_pthread_cond_timedwait (&t->sleep_cond, mutex, waittime); | |
194 | ||
195 | /* When we are still on QUEUE, we have been interrupted. We | |
196 | report this only when no other error (such as a timeout) has | |
197 | happened above. | |
198 | */ | |
199 | if (remqueue (queue, q_handle) && err == 0) | |
200 | err = EINTR; | |
201 | t->block_asyncs--; | |
202 | scm_i_reset_sleep (t); | |
203 | } | |
204 | ||
205 | return err; | |
76da80e7 | 206 | } |
9de87eea MV |
207 | |
208 | /* Wake up the first thread on QUEUE, if any. The caller must hold | |
209 | the mutex that protects QUEUE. The awoken thread is returned, or | |
210 | #f when the queue was empty. | |
211 | */ | |
212 | static SCM | |
213 | unblock_from_queue (SCM queue) | |
214 | { | |
215 | SCM thread = dequeue (queue); | |
216 | if (scm_is_true (thread)) | |
217 | scm_i_pthread_cond_signal (&SCM_I_THREAD_DATA(thread)->sleep_cond); | |
218 | return thread; | |
219 | } | |
220 | ||
221 | /* Getting into and out of guile mode. | |
222 | */ | |
223 | ||
224 | scm_i_pthread_key_t scm_i_thread_key; | |
225 | ||
d823b11b | 226 | static void |
9de87eea | 227 | resume (scm_i_thread *t) |
d823b11b | 228 | { |
d823b11b | 229 | t->top = NULL; |
9bc4701c MD |
230 | if (t->clear_freelists_p) |
231 | { | |
232 | *SCM_FREELIST_LOC (scm_i_freelist) = SCM_EOL; | |
233 | *SCM_FREELIST_LOC (scm_i_freelist2) = SCM_EOL; | |
234 | t->clear_freelists_p = 0; | |
235 | } | |
d823b11b MV |
236 | } |
237 | ||
76da80e7 | 238 | void |
9de87eea | 239 | scm_enter_guile (scm_t_guile_ticket ticket) |
d823b11b | 240 | { |
9de87eea MV |
241 | scm_i_thread *t = (scm_i_thread *)ticket; |
242 | if (t) | |
243 | { | |
244 | scm_i_pthread_mutex_lock (&t->heap_mutex); | |
245 | resume (t); | |
246 | } | |
d823b11b MV |
247 | } |
248 | ||
9de87eea MV |
249 | static scm_i_thread * |
250 | suspend (void) | |
d823b11b | 251 | { |
9de87eea | 252 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
d823b11b MV |
253 | |
254 | /* record top of stack for the GC */ | |
9de87eea | 255 | t->top = SCM_STACK_PTR (&t); |
d823b11b MV |
256 | /* save registers. */ |
257 | SCM_FLUSH_REGISTER_WINDOWS; | |
9de87eea MV |
258 | setjmp (t->regs); |
259 | return t; | |
d823b11b MV |
260 | } |
261 | ||
9de87eea MV |
262 | scm_t_guile_ticket |
263 | scm_leave_guile () | |
d823b11b | 264 | { |
9de87eea MV |
265 | scm_i_thread *t = suspend (); |
266 | scm_i_pthread_mutex_unlock (&t->heap_mutex); | |
267 | return (scm_t_guile_ticket) t; | |
d823b11b MV |
268 | } |
269 | ||
9de87eea MV |
270 | static scm_i_pthread_mutex_t thread_admin_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
271 | static scm_i_thread *all_threads = NULL; | |
272 | static int thread_count; | |
273 | ||
274 | static SCM scm_i_default_dynamic_state; | |
275 | ||
276 | /* Perform first stage of thread initialisation, in non-guile mode. | |
d823b11b | 277 | */ |
9de87eea MV |
278 | static void |
279 | guilify_self_1 (SCM_STACKITEM *base) | |
d823b11b | 280 | { |
9de87eea MV |
281 | scm_i_thread *t = malloc (sizeof (scm_i_thread)); |
282 | ||
283 | t->pthread = scm_i_pthread_self (); | |
284 | t->handle = SCM_BOOL_F; | |
285 | t->result = SCM_BOOL_F; | |
286 | t->join_queue = SCM_EOL; | |
287 | t->dynamic_state = SCM_BOOL_F; | |
288 | t->dynwinds = SCM_EOL; | |
289 | t->active_asyncs = SCM_EOL; | |
290 | t->signal_asyncs = SCM_EOL; | |
291 | t->block_asyncs = 1; | |
292 | t->pending_asyncs = 1; | |
293 | t->last_debug_frame = NULL; | |
294 | t->base = base; | |
295 | t->continuation_base = base; | |
296 | scm_i_pthread_cond_init (&t->sleep_cond, NULL); | |
297 | t->sleep_mutex = NULL; | |
298 | t->sleep_object = SCM_BOOL_F; | |
299 | t->sleep_fd = -1; | |
300 | pipe (t->sleep_pipe); | |
301 | scm_i_pthread_mutex_init (&t->heap_mutex, NULL); | |
302 | t->clear_freelists_p = 0; | |
303 | t->exited = 0; | |
304 | ||
305 | t->freelist = SCM_EOL; | |
306 | t->freelist2 = SCM_EOL; | |
307 | SCM_SET_FREELIST_LOC (scm_i_freelist, &t->freelist); | |
308 | SCM_SET_FREELIST_LOC (scm_i_freelist2, &t->freelist2); | |
309 | ||
310 | scm_i_pthread_setspecific (scm_i_thread_key, t); | |
311 | ||
312 | scm_i_pthread_mutex_lock (&t->heap_mutex); | |
313 | ||
314 | scm_i_pthread_mutex_lock (&thread_admin_mutex); | |
315 | t->next_thread = all_threads; | |
316 | all_threads = t; | |
317 | thread_count++; | |
318 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
d823b11b MV |
319 | } |
320 | ||
9de87eea | 321 | /* Perform second stage of thread initialisation, in guile mode. |
d823b11b | 322 | */ |
9de87eea MV |
323 | static void |
324 | guilify_self_2 (SCM parent) | |
d823b11b | 325 | { |
9de87eea MV |
326 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
327 | ||
328 | SCM_NEWSMOB (t->handle, scm_tc16_thread, t); | |
329 | scm_gc_register_collectable_memory (t, sizeof (scm_i_thread), "thread"); | |
330 | t->continuation_root = scm_cons (t->handle, SCM_EOL); | |
331 | t->continuation_base = t->base; | |
332 | ||
333 | if (scm_is_true (parent)) | |
334 | t->dynamic_state = scm_make_dynamic_state (parent); | |
335 | else | |
336 | t->dynamic_state = scm_i_make_initial_dynamic_state (); | |
337 | ||
338 | t->join_queue = make_queue (); | |
339 | t->block_asyncs = 0; | |
d823b11b MV |
340 | } |
341 | ||
9de87eea | 342 | /* Perform thread tear-down, in guile mode. |
d823b11b | 343 | */ |
9de87eea MV |
344 | static void * |
345 | do_thread_exit (void *v) | |
346 | { | |
347 | scm_i_thread *t = (scm_i_thread *)v, **tp; | |
348 | ||
349 | scm_i_scm_pthread_mutex_lock (&thread_admin_mutex); | |
350 | ||
351 | t->exited = 1; | |
352 | while (scm_is_true (unblock_from_queue (t->join_queue))) | |
353 | ; | |
354 | ||
355 | for (tp = &all_threads; *tp; tp = &(*tp)->next_thread) | |
356 | if (*tp == t) | |
357 | { | |
358 | *tp = t->next_thread; | |
359 | break; | |
360 | } | |
361 | thread_count--; | |
362 | ||
363 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
364 | return NULL; | |
365 | } | |
366 | ||
d823b11b | 367 | static void |
9de87eea | 368 | on_thread_exit (void *v) |
d823b11b | 369 | { |
9de87eea MV |
370 | scm_i_pthread_setspecific (scm_i_thread_key, v); |
371 | scm_with_guile (do_thread_exit, v); | |
372 | scm_i_pthread_setspecific (scm_i_thread_key, NULL); | |
d823b11b MV |
373 | } |
374 | ||
9de87eea | 375 | static scm_i_pthread_once_t init_thread_key_once = SCM_I_PTHREAD_ONCE_INIT; |
d823b11b | 376 | |
9de87eea MV |
377 | static void |
378 | init_thread_key (void) | |
379 | { | |
380 | scm_i_pthread_key_create (&scm_i_thread_key, on_thread_exit); | |
381 | } | |
d823b11b | 382 | |
9de87eea MV |
383 | /* Perform any initializations necessary to bring the current thread |
384 | into guile mode, initializing Guile itself, if necessary. | |
a54a94b3 | 385 | |
9de87eea MV |
386 | BASE is the stack base to use with GC. |
387 | ||
388 | PARENT is the dynamic state to use as the parent, ot SCM_BOOL_F in | |
389 | which case the default dynamic state is used. | |
390 | ||
391 | Return zero when the thread was in guile mode already; otherwise | |
392 | return 1. | |
393 | */ | |
394 | ||
395 | static int | |
396 | scm_i_init_thread_for_guile (SCM_STACKITEM *base, SCM parent) | |
d823b11b | 397 | { |
9de87eea MV |
398 | scm_i_thread *t; |
399 | ||
400 | scm_i_pthread_once (&init_thread_key_once, init_thread_key); | |
401 | ||
402 | if ((t = SCM_I_CURRENT_THREAD) == NULL) | |
403 | { | |
404 | /* This thread has not been guilified yet. | |
405 | */ | |
406 | ||
407 | scm_i_pthread_mutex_lock (&scm_i_init_mutex); | |
408 | if (scm_initialized_p == 0) | |
409 | { | |
410 | /* First thread ever to enter Guile. Run the full | |
411 | initialization. | |
412 | */ | |
413 | scm_i_init_guile (base); | |
414 | scm_i_pthread_mutex_unlock (&scm_i_init_mutex); | |
415 | } | |
416 | else | |
417 | { | |
418 | /* Guile is already initialized, but this thread enters it for | |
419 | the first time. Only initialize this thread. | |
420 | */ | |
421 | scm_i_pthread_mutex_unlock (&scm_i_init_mutex); | |
422 | guilify_self_1 (base); | |
423 | guilify_self_2 (parent); | |
424 | } | |
425 | return 1; | |
426 | } | |
427 | else if (t->top) | |
428 | { | |
429 | /* This thread is already guilified but not in guile mode, just | |
430 | resume it. | |
431 | ||
432 | XXX - base might be lower than when this thread was first | |
433 | guilified. | |
434 | */ | |
435 | scm_enter_guile ((scm_t_guile_ticket) t); | |
436 | return 1; | |
437 | } | |
438 | else | |
439 | { | |
440 | /* Thread is already in guile mode. Nothing to do. | |
441 | */ | |
442 | return 0; | |
443 | } | |
d823b11b MV |
444 | } |
445 | ||
9de87eea MV |
446 | #ifdef HAVE_LIBC_STACK_END |
447 | ||
448 | extern void *__libc_stack_end; | |
449 | ||
450 | #if SCM_USE_PTHREAD_THREADS | |
451 | #ifdef HAVE_PTHREAD_ATTR_GETSTACK | |
452 | ||
453 | #define HAVE_GET_THREAD_STACK_BASE | |
454 | ||
455 | static SCM_STACKITEM * | |
456 | get_thread_stack_base () | |
d823b11b | 457 | { |
9de87eea MV |
458 | pthread_attr_t attr; |
459 | void *start, *end; | |
460 | size_t size; | |
461 | ||
462 | /* XXX - pthread_getattr_np from LinuxThreads does not seem to work | |
463 | for the main thread, but we can use __libc_stack_end in that | |
464 | case. | |
465 | */ | |
466 | ||
467 | pthread_getattr_np (pthread_self (), &attr); | |
468 | pthread_attr_getstack (&attr, &start, &size); | |
469 | end = (char *)start + size; | |
470 | ||
471 | if ((void *)&attr < start || (void *)&attr >= end) | |
472 | return __libc_stack_end; | |
473 | else | |
474 | { | |
475 | #if SCM_STACK_GROWS_UP | |
476 | return start; | |
477 | #else | |
478 | return end; | |
479 | #endif | |
480 | } | |
a54a94b3 MV |
481 | } |
482 | ||
9de87eea MV |
483 | #endif /* HAVE_PTHREAD_ATTR_GETSTACK */ |
484 | ||
485 | #else /* !SCM_USE_PTHREAD_THREADS */ | |
486 | ||
487 | #define HAVE_GET_THREAD_STACK_BASE | |
488 | ||
489 | static SCM_STACKITEM * | |
490 | get_thread_stack_base () | |
a54a94b3 | 491 | { |
9de87eea | 492 | return __libc_stack_end; |
d823b11b MV |
493 | } |
494 | ||
9de87eea MV |
495 | #endif /* !SCM_USE_PTHREAD_THREADS */ |
496 | #endif /* HAVE_LIBC_STACK_END */ | |
497 | ||
498 | #ifdef HAVE_GET_THREAD_STACK_BASE | |
499 | ||
500 | void | |
501 | scm_init_guile () | |
d823b11b | 502 | { |
9de87eea MV |
503 | scm_i_init_thread_for_guile (get_thread_stack_base (), |
504 | scm_i_default_dynamic_state); | |
d823b11b MV |
505 | } |
506 | ||
9de87eea MV |
507 | #endif |
508 | ||
509 | void * | |
510 | scm_with_guile (void *(*func)(void *), void *data) | |
511 | { | |
512 | return scm_i_with_guile_and_parent (func, data, | |
513 | scm_i_default_dynamic_state); | |
514 | } | |
515 | ||
516 | void * | |
517 | scm_i_with_guile_and_parent (void *(*func)(void *), void *data, | |
518 | SCM parent) | |
519 | { | |
520 | void *res; | |
521 | int really_entered; | |
522 | SCM_STACKITEM base_item; | |
523 | really_entered = scm_i_init_thread_for_guile (&base_item, parent); | |
524 | res = scm_c_with_continuation_barrier (func, data); | |
525 | if (really_entered) | |
526 | scm_leave_guile (); | |
527 | return res; | |
528 | } | |
529 | ||
530 | void * | |
531 | scm_without_guile (void *(*func)(void *), void *data) | |
d823b11b | 532 | { |
9de87eea MV |
533 | void *res; |
534 | scm_t_guile_ticket t; | |
535 | t = scm_leave_guile (); | |
536 | res = func (data); | |
537 | scm_enter_guile (t); | |
538 | return res; | |
539 | } | |
540 | ||
541 | /*** Thread creation */ | |
542 | ||
543 | typedef struct { | |
544 | SCM parent; | |
545 | SCM thunk; | |
546 | SCM handler; | |
76da80e7 | 547 | SCM thread; |
9de87eea MV |
548 | scm_i_pthread_mutex_t mutex; |
549 | scm_i_pthread_cond_t cond; | |
550 | } launch_data; | |
d823b11b | 551 | |
9de87eea MV |
552 | static void * |
553 | really_launch (void *d) | |
554 | { | |
555 | launch_data *data = (launch_data *)d; | |
556 | SCM thunk = data->thunk, handler = data->handler; | |
557 | scm_i_thread *t; | |
d823b11b | 558 | |
9de87eea | 559 | t = SCM_I_CURRENT_THREAD; |
a54a94b3 | 560 | |
9de87eea MV |
561 | scm_i_scm_pthread_mutex_lock (&data->mutex); |
562 | data->thread = scm_current_thread (); | |
563 | scm_i_pthread_cond_signal (&data->cond); | |
564 | scm_i_pthread_mutex_unlock (&data->mutex); | |
565 | ||
566 | if (SCM_UNBNDP (handler)) | |
567 | t->result = scm_call_0 (thunk); | |
568 | else | |
569 | t->result = scm_catch (SCM_BOOL_T, thunk, handler); | |
570 | ||
571 | return 0; | |
d823b11b MV |
572 | } |
573 | ||
9de87eea MV |
574 | static void * |
575 | launch_thread (void *d) | |
576 | { | |
577 | launch_data *data = (launch_data *)d; | |
578 | scm_i_pthread_detach (scm_i_pthread_self ()); | |
579 | scm_i_with_guile_and_parent (really_launch, d, data->parent); | |
580 | return NULL; | |
581 | } | |
582 | ||
583 | SCM_DEFINE (scm_call_with_new_thread, "call-with-new-thread", 1, 1, 0, | |
d823b11b | 584 | (SCM thunk, SCM handler), |
9de87eea MV |
585 | "Call @code{thunk} in a new thread and with a new dynamic state,\n" |
586 | "returning a new thread object representing the thread. The procedure\n" | |
587 | "@var{thunk} is called via @code{with-continuation-barrier}.\n" | |
588 | "\n" | |
589 | "When @var{handler} is specified, then @var{thunk} is called from\n" | |
590 | "within a @code{catch} with tag @code{#t} that has @var{handler} as its\n" | |
591 | "handler. This catch is established inside the continuation barrier.\n" | |
592 | "\n" | |
593 | "Once @var{thunk} or @var{handler} returns, the return value is made\n" | |
594 | "the @emph{exit value} of the thread and the thread is terminated.") | |
d823b11b MV |
595 | #define FUNC_NAME s_scm_call_with_new_thread |
596 | { | |
9de87eea MV |
597 | launch_data data; |
598 | scm_i_pthread_t id; | |
599 | int err; | |
d823b11b | 600 | |
9de87eea MV |
601 | SCM_ASSERT (scm_is_true (scm_thunk_p (thunk)), thunk, SCM_ARG1, FUNC_NAME); |
602 | SCM_ASSERT (SCM_UNBNDP (handler) || scm_is_true (scm_procedure_p (handler)), | |
603 | handler, SCM_ARG2, FUNC_NAME); | |
604 | ||
605 | data.parent = scm_current_dynamic_state (); | |
606 | data.thunk = thunk; | |
607 | data.handler = handler; | |
608 | data.thread = SCM_BOOL_F; | |
609 | scm_i_pthread_mutex_init (&data.mutex, NULL); | |
610 | scm_i_pthread_cond_init (&data.cond, NULL); | |
611 | ||
612 | scm_i_scm_pthread_mutex_lock (&data.mutex); | |
613 | err = scm_i_pthread_create (&id, NULL, launch_thread, &data); | |
614 | if (err) | |
615 | { | |
616 | scm_i_pthread_mutex_unlock (&data.mutex); | |
617 | errno = err; | |
618 | scm_syserror (NULL); | |
619 | } | |
620 | scm_i_scm_pthread_cond_wait (&data.cond, &data.mutex); | |
621 | scm_i_pthread_mutex_unlock (&data.mutex); | |
622 | ||
623 | return data.thread; | |
d823b11b MV |
624 | } |
625 | #undef FUNC_NAME | |
626 | ||
9de87eea MV |
627 | typedef struct { |
628 | SCM parent; | |
629 | scm_t_catch_body body; | |
630 | void *body_data; | |
631 | scm_t_catch_handler handler; | |
632 | void *handler_data; | |
633 | SCM thread; | |
634 | scm_i_pthread_mutex_t mutex; | |
635 | scm_i_pthread_cond_t cond; | |
636 | } spawn_data; | |
637 | ||
638 | static void * | |
639 | really_spawn (void *d) | |
640 | { | |
641 | spawn_data *data = (spawn_data *)d; | |
642 | scm_t_catch_body body = data->body; | |
643 | void *body_data = data->body_data; | |
644 | scm_t_catch_handler handler = data->handler; | |
645 | void *handler_data = data->handler_data; | |
646 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
647 | ||
648 | scm_i_scm_pthread_mutex_lock (&data->mutex); | |
649 | data->thread = scm_current_thread (); | |
650 | scm_i_pthread_cond_signal (&data->cond); | |
651 | scm_i_pthread_mutex_unlock (&data->mutex); | |
652 | ||
653 | if (handler == NULL) | |
654 | t->result = body (body_data); | |
655 | else | |
656 | t->result = scm_internal_catch (SCM_BOOL_T, | |
657 | body, body_data, | |
658 | handler, handler_data); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | static void * | |
664 | spawn_thread (void *d) | |
665 | { | |
666 | spawn_data *data = (spawn_data *)d; | |
667 | scm_i_pthread_detach (scm_i_pthread_self ()); | |
668 | scm_i_with_guile_and_parent (really_spawn, d, data->parent); | |
669 | return NULL; | |
670 | } | |
671 | ||
672 | SCM | |
673 | scm_spawn_thread (scm_t_catch_body body, void *body_data, | |
674 | scm_t_catch_handler handler, void *handler_data) | |
675 | { | |
676 | spawn_data data; | |
677 | scm_i_pthread_t id; | |
678 | int err; | |
679 | ||
680 | data.parent = scm_current_dynamic_state (); | |
681 | data.body = body; | |
682 | data.body_data = body_data; | |
683 | data.handler = handler; | |
684 | data.handler_data = handler_data; | |
685 | data.thread = SCM_BOOL_F; | |
686 | scm_i_pthread_mutex_init (&data.mutex, NULL); | |
687 | scm_i_pthread_cond_init (&data.cond, NULL); | |
688 | ||
689 | scm_i_scm_pthread_mutex_lock (&data.mutex); | |
690 | err = scm_i_pthread_create (&id, NULL, spawn_thread, &data); | |
691 | if (err) | |
692 | { | |
693 | scm_i_pthread_mutex_unlock (&data.mutex); | |
694 | errno = err; | |
695 | scm_syserror (NULL); | |
696 | } | |
697 | scm_i_scm_pthread_cond_wait (&data.cond, &data.mutex); | |
698 | scm_i_pthread_mutex_unlock (&data.mutex); | |
699 | ||
700 | return data.thread; | |
701 | } | |
702 | ||
29717c89 MD |
703 | SCM_DEFINE (scm_yield, "yield", 0, 0, 0, |
704 | (), | |
705 | "Move the calling thread to the end of the scheduling queue.") | |
706 | #define FUNC_NAME s_scm_yield | |
707 | { | |
9de87eea | 708 | return scm_from_bool (scm_i_sched_yield ()); |
29717c89 MD |
709 | } |
710 | #undef FUNC_NAME | |
711 | ||
d823b11b | 712 | SCM_DEFINE (scm_join_thread, "join-thread", 1, 0, 0, |
5f05c406 | 713 | (SCM thread), |
d823b11b MV |
714 | "Suspend execution of the calling thread until the target @var{thread} " |
715 | "terminates, unless the target @var{thread} has already terminated. ") | |
716 | #define FUNC_NAME s_scm_join_thread | |
5f05c406 | 717 | { |
9de87eea | 718 | scm_i_thread *t; |
d823b11b MV |
719 | SCM res; |
720 | ||
721 | SCM_VALIDATE_THREAD (1, thread); | |
9de87eea | 722 | if (scm_is_eq (scm_current_thread (), thread)) |
d823b11b MV |
723 | SCM_MISC_ERROR ("can not join the current thread", SCM_EOL); |
724 | ||
9de87eea MV |
725 | scm_i_scm_pthread_mutex_lock (&thread_admin_mutex); |
726 | ||
727 | t = SCM_I_THREAD_DATA (thread); | |
d823b11b MV |
728 | if (!t->exited) |
729 | { | |
9de87eea MV |
730 | while (1) |
731 | { | |
732 | block_self (t->join_queue, thread, &thread_admin_mutex, NULL); | |
733 | if (t->exited) | |
734 | break; | |
735 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
736 | SCM_TICK; | |
737 | scm_i_scm_pthread_mutex_lock (&thread_admin_mutex); | |
738 | } | |
d823b11b MV |
739 | } |
740 | res = t->result; | |
9de87eea MV |
741 | |
742 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
d823b11b | 743 | return res; |
5f05c406 MV |
744 | } |
745 | #undef FUNC_NAME | |
746 | ||
9de87eea | 747 | /*** Fat mutexes */ |
4079f87e | 748 | |
d823b11b MV |
749 | /* We implement our own mutex type since we want them to be 'fair', we |
750 | want to do fancy things while waiting for them (like running | |
9de87eea MV |
751 | asyncs) and we might want to add things that are nice for |
752 | debugging. | |
d823b11b | 753 | */ |
4079f87e | 754 | |
9de87eea MV |
755 | typedef struct { |
756 | scm_i_pthread_mutex_t lock; | |
d823b11b | 757 | SCM owner; |
9de87eea MV |
758 | int level; /* how much the owner owns us. |
759 | < 0 for non-recursive mutexes */ | |
760 | SCM waiting; /* the threads waiting for this mutex. */ | |
761 | } fat_mutex; | |
762 | ||
763 | #define SCM_MUTEXP(x) SCM_SMOB_PREDICATE (scm_tc16_mutex, x) | |
764 | #define SCM_MUTEX_DATA(x) ((fat_mutex *) SCM_SMOB_DATA (x)) | |
5f05c406 | 765 | |
d823b11b | 766 | static SCM |
9de87eea | 767 | fat_mutex_mark (SCM mx) |
d823b11b | 768 | { |
9de87eea | 769 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
d823b11b MV |
770 | scm_gc_mark (m->owner); |
771 | return m->waiting; | |
772 | } | |
4079f87e | 773 | |
9de87eea MV |
774 | static size_t |
775 | fat_mutex_free (SCM mx) | |
76da80e7 | 776 | { |
9de87eea MV |
777 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
778 | scm_i_pthread_mutex_destroy (&m->lock); | |
779 | scm_gc_free (m, sizeof (fat_mutex), "mutex"); | |
76da80e7 MV |
780 | return 0; |
781 | } | |
782 | ||
783 | static int | |
9de87eea | 784 | fat_mutex_print (SCM mx, SCM port, scm_print_state *pstate SCM_UNUSED) |
76da80e7 | 785 | { |
9de87eea MV |
786 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
787 | scm_puts ("#<mutex ", port); | |
788 | scm_uintprint ((scm_t_bits)m, 16, port); | |
789 | scm_puts (">", port); | |
790 | return 1; | |
76da80e7 MV |
791 | } |
792 | ||
76da80e7 | 793 | static SCM |
9de87eea | 794 | make_fat_mutex (int recursive) |
76da80e7 | 795 | { |
9de87eea MV |
796 | fat_mutex *m; |
797 | SCM mx; | |
798 | ||
799 | m = scm_gc_malloc (sizeof (fat_mutex), "mutex"); | |
800 | scm_i_pthread_mutex_init (&m->lock, NULL); | |
801 | m->owner = SCM_BOOL_F; | |
802 | m->level = recursive? 0 : -1; | |
803 | m->waiting = SCM_EOL; | |
804 | SCM_NEWSMOB (mx, scm_tc16_mutex, (scm_t_bits) m); | |
805 | m->waiting = make_queue (); | |
806 | return mx; | |
76da80e7 MV |
807 | } |
808 | ||
9de87eea | 809 | SCM_DEFINE (scm_make_mutex, "make-mutex", 0, 0, 0, |
76da80e7 | 810 | (void), |
9de87eea MV |
811 | "Create a new mutex. ") |
812 | #define FUNC_NAME s_scm_make_mutex | |
76da80e7 | 813 | { |
9de87eea | 814 | return make_fat_mutex (0); |
76da80e7 MV |
815 | } |
816 | #undef FUNC_NAME | |
817 | ||
9de87eea | 818 | SCM_DEFINE (scm_make_recursive_mutex, "make-recursive-mutex", 0, 0, 0, |
9bc4701c | 819 | (void), |
9de87eea MV |
820 | "Create a new recursive mutex. ") |
821 | #define FUNC_NAME s_scm_make_recursive_mutex | |
9bc4701c | 822 | { |
9de87eea | 823 | return make_fat_mutex (1); |
9bc4701c MD |
824 | } |
825 | #undef FUNC_NAME | |
826 | ||
9de87eea MV |
827 | static char * |
828 | fat_mutex_lock (SCM mutex) | |
829 | { | |
830 | fat_mutex *m = SCM_MUTEX_DATA (mutex); | |
831 | SCM thread = scm_current_thread (); | |
832 | char *msg = NULL; | |
833 | ||
834 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
835 | if (scm_is_false (m->owner)) | |
836 | m->owner = thread; | |
837 | else if (scm_is_eq (m->owner, thread)) | |
838 | { | |
839 | if (m->level >= 0) | |
840 | m->level++; | |
841 | else | |
842 | msg = "mutex already locked by current thread"; | |
843 | } | |
844 | else | |
845 | { | |
846 | while (1) | |
847 | { | |
848 | block_self (m->waiting, mutex, &m->lock, NULL); | |
849 | if (scm_is_eq (m->owner, thread)) | |
850 | break; | |
851 | scm_i_pthread_mutex_unlock (&m->lock); | |
852 | SCM_TICK; | |
853 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
854 | } | |
855 | } | |
856 | scm_i_pthread_mutex_unlock (&m->lock); | |
857 | return msg; | |
858 | } | |
859 | ||
9bc4701c MD |
860 | SCM_DEFINE (scm_lock_mutex, "lock-mutex", 1, 0, 0, |
861 | (SCM mx), | |
862 | "Lock @var{mutex}. If the mutex is already locked, the calling thread " | |
863 | "blocks until the mutex becomes available. The function returns when " | |
864 | "the calling thread owns the lock on @var{mutex}. Locking a mutex that " | |
865 | "a thread already owns will succeed right away and will not block the " | |
866 | "thread. That is, Guile's mutexes are @emph{recursive}. ") | |
867 | #define FUNC_NAME s_scm_lock_mutex | |
868 | { | |
9bc4701c | 869 | SCM_VALIDATE_MUTEX (1, mx); |
9de87eea | 870 | char *msg; |
76da80e7 | 871 | |
9de87eea MV |
872 | msg = fat_mutex_lock (mx); |
873 | if (msg) | |
874 | scm_misc_error (NULL, msg, SCM_EOL); | |
76da80e7 | 875 | return SCM_BOOL_T; |
9bc4701c | 876 | } |
76da80e7 | 877 | #undef FUNC_NAME |
9bc4701c | 878 | |
9de87eea MV |
879 | static char * |
880 | fat_mutex_trylock (fat_mutex *m, int *resp) | |
881 | { | |
882 | char *msg = NULL; | |
883 | SCM thread = scm_current_thread (); | |
884 | ||
885 | *resp = 1; | |
886 | scm_i_pthread_mutex_lock (&m->lock); | |
887 | if (scm_is_false (m->owner)) | |
888 | m->owner = thread; | |
889 | else if (scm_is_eq (m->owner, thread)) | |
890 | { | |
891 | if (m->level >= 0) | |
892 | m->level++; | |
893 | else | |
894 | msg = "mutex already locked by current thread"; | |
895 | } | |
896 | else | |
897 | *resp = 0; | |
898 | scm_i_pthread_mutex_unlock (&m->lock); | |
899 | return msg; | |
900 | } | |
901 | ||
9bc4701c | 902 | SCM_DEFINE (scm_try_mutex, "try-mutex", 1, 0, 0, |
ba1b7223 | 903 | (SCM mutex), |
9bc4701c MD |
904 | "Try to lock @var{mutex}. If the mutex is already locked by someone " |
905 | "else, return @code{#f}. Else lock the mutex and return @code{#t}. ") | |
906 | #define FUNC_NAME s_scm_try_mutex | |
907 | { | |
9de87eea MV |
908 | char *msg; |
909 | int res; | |
910 | ||
ba1b7223 | 911 | SCM_VALIDATE_MUTEX (1, mutex); |
9bc4701c | 912 | |
ba1b7223 | 913 | msg = fat_mutex_trylock (SCM_MUTEX_DATA (mutex), &res); |
9de87eea MV |
914 | if (msg) |
915 | scm_misc_error (NULL, msg, SCM_EOL); | |
916 | return scm_from_bool (res); | |
917 | } | |
918 | #undef FUNC_NAME | |
76da80e7 | 919 | |
9de87eea MV |
920 | static char * |
921 | fat_mutex_unlock (fat_mutex *m) | |
922 | { | |
923 | char *msg = NULL; | |
924 | ||
925 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
926 | if (!scm_is_eq (m->owner, scm_current_thread ())) | |
9bc4701c | 927 | { |
9de87eea MV |
928 | if (scm_is_false (m->owner)) |
929 | msg = "mutex not locked"; | |
930 | else | |
931 | msg = "mutex not locked by current thread"; | |
9bc4701c | 932 | } |
9de87eea MV |
933 | else if (m->level > 0) |
934 | m->level--; | |
935 | else | |
936 | m->owner = unblock_from_queue (m->waiting); | |
937 | scm_i_pthread_mutex_unlock (&m->lock); | |
938 | ||
939 | return msg; | |
9bc4701c | 940 | } |
9bc4701c MD |
941 | |
942 | SCM_DEFINE (scm_unlock_mutex, "unlock-mutex", 1, 0, 0, | |
943 | (SCM mx), | |
944 | "Unlocks @var{mutex} if the calling thread owns the lock on " | |
945 | "@var{mutex}. Calling unlock-mutex on a mutex not owned by the current " | |
946 | "thread results in undefined behaviour. Once a mutex has been unlocked, " | |
947 | "one thread blocked on @var{mutex} is awakened and grabs the mutex " | |
948 | "lock. Every call to @code{lock-mutex} by this thread must be matched " | |
949 | "with a call to @code{unlock-mutex}. Only the last call to " | |
950 | "@code{unlock-mutex} will actually unlock the mutex. ") | |
951 | #define FUNC_NAME s_scm_unlock_mutex | |
952 | { | |
9de87eea | 953 | char *msg; |
9bc4701c MD |
954 | SCM_VALIDATE_MUTEX (1, mx); |
955 | ||
9de87eea MV |
956 | msg = fat_mutex_unlock (SCM_MUTEX_DATA (mx)); |
957 | if (msg) | |
958 | scm_misc_error (NULL, msg, SCM_EOL); | |
9bc4701c MD |
959 | return SCM_BOOL_T; |
960 | } | |
961 | #undef FUNC_NAME | |
962 | ||
9de87eea MV |
963 | #if 0 |
964 | ||
965 | SCM_DEFINE (scm_mutex_owner, "mutex-owner", 1, 0, 0, | |
966 | (SCM mx), | |
967 | "Return the thread owning @var{mx}, or @code{#f}.") | |
968 | #define FUNC_NAME s_scm_mutex_owner | |
969 | { | |
970 | SCM_VALIDATE_MUTEX (1, mx); | |
971 | return (SCM_MUTEX_DATA(mx))->owner; | |
972 | } | |
973 | #undef FUNC_NAME | |
974 | ||
975 | SCM_DEFINE (scm_mutex_level, "mutex-level", 1, 0, 0, | |
976 | (SCM mx), | |
977 | "Return the lock level of a recursive mutex, or -1\n" | |
978 | "for a standard mutex.") | |
979 | #define FUNC_NAME s_scm_mutex_level | |
980 | { | |
981 | SCM_VALIDATE_MUTEX (1, mx); | |
982 | return scm_from_int (SCM_MUTEX_DATA(mx)->level); | |
983 | } | |
984 | #undef FUNC_NAME | |
985 | ||
986 | #endif | |
987 | ||
988 | /*** Fat condition variables */ | |
989 | ||
990 | typedef struct { | |
991 | scm_i_pthread_mutex_t lock; | |
992 | SCM waiting; /* the threads waiting for this condition. */ | |
993 | } fat_cond; | |
994 | ||
995 | #define SCM_CONDVARP(x) SCM_SMOB_PREDICATE (scm_tc16_condvar, x) | |
996 | #define SCM_CONDVAR_DATA(x) ((fat_cond *) SCM_SMOB_DATA (x)) | |
997 | ||
998 | static SCM | |
999 | fat_cond_mark (SCM cv) | |
1000 | { | |
1001 | fat_cond *c = SCM_CONDVAR_DATA (cv); | |
1002 | return c->waiting; | |
1003 | } | |
1004 | ||
1005 | static size_t | |
1006 | fat_cond_free (SCM mx) | |
1007 | { | |
1008 | fat_cond *c = SCM_CONDVAR_DATA (mx); | |
1009 | scm_i_pthread_mutex_destroy (&c->lock); | |
1010 | scm_gc_free (c, sizeof (fat_cond), "condition-variable"); | |
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | static int | |
1015 | fat_cond_print (SCM cv, SCM port, scm_print_state *pstate SCM_UNUSED) | |
1016 | { | |
1017 | fat_cond *c = SCM_CONDVAR_DATA (cv); | |
1018 | scm_puts ("#<condition-variable ", port); | |
1019 | scm_uintprint ((scm_t_bits)c, 16, port); | |
1020 | scm_puts (">", port); | |
1021 | return 1; | |
1022 | } | |
9bc4701c | 1023 | |
d823b11b MV |
1024 | SCM_DEFINE (scm_make_condition_variable, "make-condition-variable", 0, 0, 0, |
1025 | (void), | |
1026 | "Make a new condition variable.") | |
1027 | #define FUNC_NAME s_scm_make_condition_variable | |
5f05c406 | 1028 | { |
9de87eea MV |
1029 | fat_cond *c; |
1030 | SCM cv; | |
1031 | ||
1032 | c = scm_gc_malloc (sizeof (fat_cond), "condition variable"); | |
1033 | scm_i_pthread_mutex_init (&c->lock, 0); | |
1034 | c->waiting = SCM_EOL; | |
1035 | SCM_NEWSMOB (cv, scm_tc16_condvar, (scm_t_bits) c); | |
1036 | c->waiting = make_queue (); | |
d823b11b | 1037 | return cv; |
5f05c406 | 1038 | } |
d823b11b | 1039 | #undef FUNC_NAME |
5f05c406 | 1040 | |
9de87eea MV |
1041 | static int |
1042 | fat_cond_timedwait (SCM cond, SCM mutex, | |
1043 | const scm_t_timespec *waittime) | |
1044 | { | |
1045 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1046 | fat_cond *c = SCM_CONDVAR_DATA (cond); | |
1047 | fat_mutex *m = SCM_MUTEX_DATA (mutex); | |
1048 | const char *msg; | |
1049 | int err = 0; | |
1050 | ||
1051 | while (1) | |
1052 | { | |
1053 | fprintf (stderr, "cond wait on %p\n", &c->lock); | |
1054 | ||
1055 | scm_i_scm_pthread_mutex_lock (&c->lock); | |
1056 | msg = fat_mutex_unlock (m); | |
1057 | t->block_asyncs++; | |
1058 | if (msg == NULL) | |
1059 | { | |
1060 | err = block_self (c->waiting, cond, &c->lock, waittime); | |
1061 | scm_i_pthread_mutex_unlock (&c->lock); | |
1062 | fprintf (stderr, "locking mutex\n"); | |
1063 | fat_mutex_lock (mutex); | |
1064 | } | |
1065 | else | |
1066 | scm_i_pthread_mutex_unlock (&c->lock); | |
1067 | t->block_asyncs--; | |
1068 | scm_async_click (); | |
1069 | ||
1070 | fprintf (stderr, "back: %s, %d\n", msg, err); | |
1071 | ||
1072 | if (msg) | |
1073 | scm_misc_error (NULL, msg, SCM_EOL); | |
1074 | ||
1075 | scm_remember_upto_here_2 (cond, mutex); | |
1076 | ||
1077 | if (err == 0) | |
1078 | return 1; | |
1079 | if (err == ETIMEDOUT) | |
1080 | return 0; | |
1081 | if (err != EINTR) | |
1082 | { | |
1083 | errno = err; | |
1084 | scm_syserror (NULL); | |
1085 | } | |
1086 | } | |
1087 | } | |
1088 | ||
d823b11b MV |
1089 | SCM_DEFINE (scm_timed_wait_condition_variable, "wait-condition-variable", 2, 1, 0, |
1090 | (SCM cv, SCM mx, SCM t), | |
1091 | "Wait until @var{cond-var} has been signalled. While waiting, " | |
1092 | "@var{mutex} is atomically unlocked (as with @code{unlock-mutex}) and " | |
1093 | "is locked again when this function returns. When @var{time} is given, " | |
1094 | "it specifies a point in time where the waiting should be aborted. It " | |
1095 | "can be either a integer as returned by @code{current-time} or a pair " | |
1096 | "as returned by @code{gettimeofday}. When the waiting is aborted the " | |
1097 | "mutex is locked and @code{#f} is returned. When the condition " | |
1098 | "variable is in fact signalled, the mutex is also locked and @code{#t} " | |
1099 | "is returned. ") | |
1100 | #define FUNC_NAME s_scm_timed_wait_condition_variable | |
5f05c406 | 1101 | { |
9de87eea | 1102 | scm_t_timespec waittime, *waitptr = NULL; |
d823b11b MV |
1103 | |
1104 | SCM_VALIDATE_CONDVAR (1, cv); | |
1105 | SCM_VALIDATE_MUTEX (2, mx); | |
9bc4701c | 1106 | |
d823b11b MV |
1107 | if (!SCM_UNBNDP (t)) |
1108 | { | |
d2e53ed6 | 1109 | if (scm_is_pair (t)) |
d823b11b | 1110 | { |
9de87eea MV |
1111 | waittime.tv_sec = scm_to_ulong (SCM_CAR (t)); |
1112 | waittime.tv_nsec = scm_to_ulong (SCM_CAR (t)) * 1000; | |
d823b11b MV |
1113 | } |
1114 | else | |
1115 | { | |
9de87eea | 1116 | waittime.tv_sec = scm_to_ulong (t); |
d823b11b MV |
1117 | waittime.tv_nsec = 0; |
1118 | } | |
9de87eea | 1119 | waitptr = &waittime; |
d823b11b MV |
1120 | } |
1121 | ||
9de87eea | 1122 | return scm_from_bool (fat_cond_timedwait (cv, mx, waitptr)); |
5f05c406 | 1123 | } |
d823b11b | 1124 | #undef FUNC_NAME |
5f05c406 | 1125 | |
9de87eea MV |
1126 | static void |
1127 | fat_cond_signal (fat_cond *c) | |
1128 | { | |
1129 | fprintf (stderr, "cond signal on %p\n", &c->lock); | |
1130 | ||
1131 | scm_i_scm_pthread_mutex_lock (&c->lock); | |
1132 | unblock_from_queue (c->waiting); | |
1133 | scm_i_pthread_mutex_unlock (&c->lock); | |
1134 | } | |
1135 | ||
d823b11b MV |
1136 | SCM_DEFINE (scm_signal_condition_variable, "signal-condition-variable", 1, 0, 0, |
1137 | (SCM cv), | |
1138 | "Wake up one thread that is waiting for @var{cv}") | |
1139 | #define FUNC_NAME s_scm_signal_condition_variable | |
5f05c406 | 1140 | { |
d823b11b | 1141 | SCM_VALIDATE_CONDVAR (1, cv); |
9de87eea | 1142 | fat_cond_signal (SCM_CONDVAR_DATA (cv)); |
d823b11b | 1143 | return SCM_BOOL_T; |
5f05c406 | 1144 | } |
d823b11b | 1145 | #undef FUNC_NAME |
5f05c406 | 1146 | |
9de87eea MV |
1147 | static void |
1148 | fat_cond_broadcast (fat_cond *c) | |
1149 | { | |
1150 | scm_i_scm_pthread_mutex_lock (&c->lock); | |
1151 | while (scm_is_true (unblock_from_queue (c->waiting))) | |
1152 | ; | |
1153 | scm_i_pthread_mutex_unlock (&c->lock); | |
1154 | } | |
1155 | ||
d823b11b MV |
1156 | SCM_DEFINE (scm_broadcast_condition_variable, "broadcast-condition-variable", 1, 0, 0, |
1157 | (SCM cv), | |
1158 | "Wake up all threads that are waiting for @var{cv}. ") | |
1159 | #define FUNC_NAME s_scm_broadcast_condition_variable | |
5f05c406 | 1160 | { |
d823b11b | 1161 | SCM_VALIDATE_CONDVAR (1, cv); |
9de87eea | 1162 | fat_cond_broadcast (SCM_CONDVAR_DATA (cv)); |
d823b11b | 1163 | return SCM_BOOL_T; |
5f05c406 | 1164 | } |
d823b11b | 1165 | #undef FUNC_NAME |
5f05c406 | 1166 | |
d823b11b MV |
1167 | /*** Marking stacks */ |
1168 | ||
1169 | /* XXX - what to do with this? Do we need to handle this for blocked | |
1170 | threads as well? | |
1171 | */ | |
1172 | #ifdef __ia64__ | |
1173 | # define SCM_MARK_BACKING_STORE() do { \ | |
1174 | ucontext_t ctx; \ | |
1175 | SCM_STACKITEM * top, * bot; \ | |
1176 | getcontext (&ctx); \ | |
1177 | scm_mark_locations ((SCM_STACKITEM *) &ctx.uc_mcontext, \ | |
1178 | ((size_t) (sizeof (SCM_STACKITEM) - 1 + sizeof ctx.uc_mcontext) \ | |
1179 | / sizeof (SCM_STACKITEM))); \ | |
1180 | bot = (SCM_STACKITEM *) __libc_ia64_register_backing_store_base; \ | |
1181 | top = (SCM_STACKITEM *) ctx.uc_mcontext.sc_ar_bsp; \ | |
1182 | scm_mark_locations (bot, top - bot); } while (0) | |
1183 | #else | |
1184 | # define SCM_MARK_BACKING_STORE() | |
1185 | #endif | |
1186 | ||
1187 | void | |
1188 | scm_threads_mark_stacks (void) | |
5f05c406 | 1189 | { |
9de87eea MV |
1190 | scm_i_thread *t; |
1191 | for (t = all_threads; t; t = t->next_thread) | |
d823b11b | 1192 | { |
9de87eea MV |
1193 | /* Check that thread has indeed been suspended. |
1194 | */ | |
1195 | assert (t->top); | |
6087fad9 | 1196 | |
9de87eea | 1197 | scm_gc_mark (t->handle); |
6087fad9 | 1198 | |
d028af45 | 1199 | #if SCM_STACK_GROWS_UP |
9de87eea | 1200 | scm_mark_locations (t->base, t->top - t->base); |
d823b11b | 1201 | #else |
9de87eea | 1202 | scm_mark_locations (t->top, t->base - t->top); |
d823b11b | 1203 | #endif |
6087fad9 MV |
1204 | scm_mark_locations ((SCM_STACKITEM *) t->regs, |
1205 | ((size_t) sizeof(t->regs) | |
1206 | / sizeof (SCM_STACKITEM))); | |
d823b11b | 1207 | } |
59152722 MV |
1208 | |
1209 | SCM_MARK_BACKING_STORE (); | |
5f05c406 MV |
1210 | } |
1211 | ||
d823b11b MV |
1212 | /*** Select */ |
1213 | ||
911782b7 | 1214 | int |
9de87eea MV |
1215 | scm_std_select (int nfds, |
1216 | SELECT_TYPE *readfds, | |
1217 | SELECT_TYPE *writefds, | |
1218 | SELECT_TYPE *exceptfds, | |
1219 | struct timeval *timeout) | |
1220 | { | |
1221 | fd_set my_readfds; | |
1222 | int res, eno, wakeup_fd; | |
1223 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1224 | scm_t_guile_ticket ticket; | |
1225 | ||
1226 | if (readfds == NULL) | |
1227 | { | |
1228 | FD_ZERO (&my_readfds); | |
1229 | readfds = &my_readfds; | |
1230 | } | |
1231 | ||
1232 | while (scm_i_setup_sleep (t, SCM_BOOL_F, NULL, t->sleep_pipe[1])) | |
1233 | SCM_TICK; | |
1234 | ||
1235 | wakeup_fd = t->sleep_pipe[0]; | |
1236 | ticket = scm_leave_guile (); | |
1237 | FD_SET (wakeup_fd, readfds); | |
1238 | if (wakeup_fd >= nfds) | |
1239 | nfds = wakeup_fd+1; | |
1240 | res = select (nfds, readfds, writefds, exceptfds, timeout); | |
1241 | t->sleep_fd = -1; | |
d823b11b | 1242 | eno = errno; |
9de87eea MV |
1243 | scm_enter_guile (ticket); |
1244 | ||
1245 | scm_i_reset_sleep (t); | |
1246 | ||
1247 | if (res > 0 && FD_ISSET (wakeup_fd, readfds)) | |
1248 | { | |
1249 | char dummy; | |
1250 | read (wakeup_fd, &dummy, 1); | |
1251 | FD_CLR (wakeup_fd, readfds); | |
1252 | res -= 1; | |
1253 | if (res == 0) | |
1254 | { | |
1255 | eno = EINTR; | |
1256 | res = -1; | |
1257 | } | |
1258 | } | |
d823b11b MV |
1259 | errno = eno; |
1260 | return res; | |
5f05c406 MV |
1261 | } |
1262 | ||
9de87eea | 1263 | /* Convenience API for blocking while in guile mode. */ |
76da80e7 | 1264 | |
9de87eea | 1265 | #if SCM_USE_PTHREAD_THREADS |
92e64b87 | 1266 | |
9bc4701c | 1267 | int |
9de87eea | 1268 | scm_pthread_mutex_lock (scm_i_pthread_mutex_t *mutex) |
9bc4701c | 1269 | { |
9de87eea MV |
1270 | scm_t_guile_ticket t = scm_leave_guile (); |
1271 | int res = scm_i_pthread_mutex_lock (mutex); | |
1272 | scm_enter_guile (t); | |
9bc4701c MD |
1273 | return res; |
1274 | } | |
1275 | ||
9de87eea MV |
1276 | static void |
1277 | unlock (void *data) | |
28d52ebb | 1278 | { |
9de87eea | 1279 | scm_i_pthread_mutex_unlock ((scm_i_pthread_mutex_t *)data); |
28d52ebb MD |
1280 | } |
1281 | ||
1282 | void | |
9de87eea | 1283 | scm_frame_pthread_mutex_lock (scm_i_pthread_mutex_t *mutex) |
28d52ebb | 1284 | { |
9de87eea MV |
1285 | scm_i_scm_pthread_mutex_lock (mutex); |
1286 | scm_frame_unwind_handler (unlock, mutex, SCM_F_WIND_EXPLICITLY); | |
28d52ebb MD |
1287 | } |
1288 | ||
9bc4701c | 1289 | int |
9de87eea | 1290 | scm_pthread_cond_wait (scm_i_pthread_cond_t *cond, scm_i_pthread_mutex_t *mutex) |
9bc4701c | 1291 | { |
9de87eea MV |
1292 | scm_t_guile_ticket t = scm_leave_guile (); |
1293 | int res = scm_i_pthread_cond_wait (cond, mutex); | |
1294 | scm_enter_guile (t); | |
9bc4701c MD |
1295 | return res; |
1296 | } | |
9bc4701c | 1297 | |
76da80e7 | 1298 | int |
9de87eea MV |
1299 | scm_pthread_cond_timedwait (scm_i_pthread_cond_t *cond, |
1300 | scm_i_pthread_mutex_t *mutex, | |
1301 | const scm_t_timespec *wt) | |
76da80e7 | 1302 | { |
9de87eea MV |
1303 | scm_t_guile_ticket t = scm_leave_guile (); |
1304 | int res = scm_i_pthread_cond_timedwait (cond, mutex, wt); | |
1305 | scm_enter_guile (t); | |
1306 | return res; | |
76da80e7 MV |
1307 | } |
1308 | ||
9de87eea | 1309 | #endif |
76da80e7 | 1310 | |
d823b11b | 1311 | unsigned long |
9de87eea | 1312 | scm_std_usleep (unsigned long usecs) |
5f05c406 | 1313 | { |
d823b11b MV |
1314 | struct timeval tv; |
1315 | tv.tv_usec = usecs % 1000000; | |
1316 | tv.tv_sec = usecs / 1000000; | |
9de87eea MV |
1317 | scm_std_select (0, NULL, NULL, NULL, &tv); |
1318 | return tv.tv_sec * 1000000 + tv.tv_usec; | |
5f05c406 MV |
1319 | } |
1320 | ||
9de87eea MV |
1321 | unsigned int |
1322 | scm_std_sleep (unsigned int secs) | |
6c214b62 | 1323 | { |
d823b11b MV |
1324 | struct timeval tv; |
1325 | tv.tv_usec = 0; | |
1326 | tv.tv_sec = secs; | |
9de87eea | 1327 | scm_std_select (0, NULL, NULL, NULL, &tv); |
d823b11b | 1328 | return tv.tv_sec; |
6c214b62 MD |
1329 | } |
1330 | ||
d823b11b MV |
1331 | /*** Misc */ |
1332 | ||
1333 | SCM_DEFINE (scm_current_thread, "current-thread", 0, 0, 0, | |
1334 | (void), | |
1335 | "Return the thread that called this function.") | |
1336 | #define FUNC_NAME s_scm_current_thread | |
1337 | { | |
9de87eea | 1338 | return SCM_I_CURRENT_THREAD->handle; |
d823b11b MV |
1339 | } |
1340 | #undef FUNC_NAME | |
1341 | ||
9de87eea MV |
1342 | static SCM |
1343 | scm_c_make_list (size_t n, SCM fill) | |
1344 | { | |
1345 | SCM res = SCM_EOL; | |
1346 | while (n-- > 0) | |
1347 | res = scm_cons (fill, res); | |
1348 | return res; | |
1349 | } | |
1350 | ||
d823b11b MV |
1351 | SCM_DEFINE (scm_all_threads, "all-threads", 0, 0, 0, |
1352 | (void), | |
1353 | "Return a list of all threads.") | |
9bc4701c | 1354 | #define FUNC_NAME s_scm_all_threads |
d823b11b | 1355 | { |
9de87eea MV |
1356 | /* We can not allocate while holding the thread_admin_mutex because |
1357 | of the way GC is done. | |
1358 | */ | |
1359 | int n = thread_count; | |
1360 | scm_i_thread *t; | |
1361 | SCM list = scm_c_make_list (n, SCM_UNSPECIFIED), *l; | |
d823b11b | 1362 | |
9de87eea MV |
1363 | scm_i_pthread_mutex_lock (&thread_admin_mutex); |
1364 | l = &list; | |
1365 | for (t = all_threads; t && n > 0; t = t->next_thread) | |
1366 | { | |
1367 | SCM_SETCAR (*l, t->handle); | |
1368 | l = SCM_CDRLOC (*l); | |
1369 | n--; | |
1370 | } | |
1371 | *l = SCM_EOL; | |
1372 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
1373 | return list; | |
d823b11b | 1374 | } |
9de87eea | 1375 | #undef FUNC_NAME |
d823b11b MV |
1376 | |
1377 | SCM_DEFINE (scm_thread_exited_p, "thread-exited?", 1, 0, 0, | |
1378 | (SCM thread), | |
1379 | "Return @code{#t} iff @var{thread} has exited.\n") | |
1380 | #define FUNC_NAME s_scm_thread_exited_p | |
1381 | { | |
7888309b | 1382 | return scm_from_bool (scm_c_thread_exited_p (thread)); |
d823b11b MV |
1383 | } |
1384 | #undef FUNC_NAME | |
1385 | ||
911782b7 | 1386 | int |
d823b11b MV |
1387 | scm_c_thread_exited_p (SCM thread) |
1388 | #define FUNC_NAME s_scm_thread_exited_p | |
5f05c406 | 1389 | { |
9de87eea | 1390 | scm_i_thread *t; |
d823b11b | 1391 | SCM_VALIDATE_THREAD (1, thread); |
9de87eea | 1392 | t = SCM_I_THREAD_DATA (thread); |
d823b11b | 1393 | return t->exited; |
5f05c406 | 1394 | } |
d823b11b | 1395 | #undef FUNC_NAME |
5f05c406 | 1396 | |
9de87eea | 1397 | static scm_i_pthread_cond_t wake_up_cond; |
9bc4701c | 1398 | int scm_i_thread_go_to_sleep; |
9bc4701c | 1399 | static int threads_initialized_p = 0; |
9de87eea | 1400 | static int sleep_level = 0; |
9bc4701c MD |
1401 | |
1402 | void | |
1403 | scm_i_thread_put_to_sleep () | |
1404 | { | |
6087fad9 | 1405 | if (threads_initialized_p) |
9bc4701c | 1406 | { |
9de87eea | 1407 | scm_i_thread *t; |
6087fad9 | 1408 | |
9de87eea MV |
1409 | scm_leave_guile (); |
1410 | scm_i_pthread_mutex_lock (&thread_admin_mutex); | |
1411 | ||
1412 | if (sleep_level == 0) | |
1413 | { | |
1414 | /* Signal all threads to go to sleep | |
1415 | */ | |
1416 | scm_i_thread_go_to_sleep = 1; | |
1417 | for (t = all_threads; t; t = t->next_thread) | |
1418 | scm_i_pthread_mutex_lock (&t->heap_mutex); | |
1419 | scm_i_thread_go_to_sleep = 0; | |
1420 | } | |
1421 | else | |
76da80e7 | 1422 | { |
9de87eea MV |
1423 | /* We are already single threaded. Suspend again to update |
1424 | the recorded stack information. | |
1425 | */ | |
1426 | suspend (); | |
76da80e7 | 1427 | } |
9de87eea MV |
1428 | sleep_level += 1; |
1429 | ||
1430 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
9bc4701c MD |
1431 | } |
1432 | } | |
1433 | ||
b0dc3d71 MD |
1434 | void |
1435 | scm_i_thread_invalidate_freelists () | |
1436 | { | |
9de87eea MV |
1437 | /* thread_admin_mutex is already locked. */ |
1438 | ||
1439 | scm_i_thread *t; | |
1440 | for (t = all_threads; t; t = t->next_thread) | |
1441 | if (t != SCM_I_CURRENT_THREAD) | |
1442 | t->clear_freelists_p = 1; | |
b0dc3d71 MD |
1443 | } |
1444 | ||
9bc4701c MD |
1445 | void |
1446 | scm_i_thread_wake_up () | |
1447 | { | |
6087fad9 | 1448 | if (threads_initialized_p) |
9bc4701c | 1449 | { |
9de87eea MV |
1450 | scm_i_thread *t; |
1451 | scm_i_pthread_mutex_lock (&thread_admin_mutex); | |
1452 | ||
1453 | sleep_level -= 1; | |
1454 | if (sleep_level == 0) | |
76da80e7 | 1455 | { |
9de87eea MV |
1456 | scm_i_pthread_cond_broadcast (&wake_up_cond); |
1457 | for (t = all_threads; t; t = t->next_thread) | |
1458 | scm_i_pthread_mutex_unlock (&t->heap_mutex); | |
76da80e7 | 1459 | } |
9de87eea MV |
1460 | |
1461 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
1462 | scm_enter_guile ((scm_t_guile_ticket) SCM_I_CURRENT_THREAD); | |
9bc4701c | 1463 | } |
9bc4701c MD |
1464 | } |
1465 | ||
1466 | void | |
1467 | scm_i_thread_sleep_for_gc () | |
1468 | { | |
9de87eea MV |
1469 | scm_i_thread *t = suspend (); |
1470 | scm_i_pthread_cond_wait (&wake_up_cond, &t->heap_mutex); | |
b0dc3d71 | 1471 | resume (t); |
9bc4701c MD |
1472 | } |
1473 | ||
9de87eea MV |
1474 | static void |
1475 | put_to_sleep (void *unused) | |
1476 | { | |
1477 | scm_i_thread_put_to_sleep (); | |
1478 | } | |
9bc4701c | 1479 | |
9de87eea MV |
1480 | static void |
1481 | wake_up (void *unused) | |
1482 | { | |
1483 | scm_i_thread_wake_up (); | |
1484 | } | |
7bfd3b9e | 1485 | |
9de87eea MV |
1486 | void |
1487 | scm_i_frame_single_threaded () | |
1488 | { | |
1489 | scm_frame_rewind_handler (put_to_sleep, NULL, SCM_F_WIND_EXPLICITLY); | |
1490 | scm_frame_unwind_handler (wake_up, NULL, SCM_F_WIND_EXPLICITLY); | |
1491 | } | |
1492 | ||
1493 | scm_i_pthread_mutex_t scm_i_critical_section_mutex = | |
1494 | SCM_I_PTHREAD_MUTEX_INITIALIZER; | |
a54a94b3 | 1495 | |
9bc4701c | 1496 | void |
9de87eea | 1497 | scm_frame_critical_section () |
76da80e7 | 1498 | { |
9de87eea MV |
1499 | scm_i_frame_pthread_mutex_lock (&scm_i_critical_section_mutex); |
1500 | scm_frame_block_asyncs (); | |
1501 | } | |
1502 | ||
1503 | /*** Initialization */ | |
1504 | ||
1505 | scm_i_pthread_key_t scm_i_freelist, scm_i_freelist2; | |
1506 | scm_i_pthread_mutex_t scm_i_misc_mutex; | |
1507 | ||
1508 | void | |
1509 | scm_threads_prehistory (SCM_STACKITEM *base) | |
1510 | { | |
1511 | scm_i_pthread_mutex_init (&thread_admin_mutex, NULL); | |
1512 | scm_i_pthread_mutex_init (&scm_i_misc_mutex, NULL); | |
1513 | scm_i_pthread_cond_init (&wake_up_cond, NULL); | |
1514 | scm_i_pthread_mutex_init (&scm_i_critical_section_mutex, NULL); | |
1515 | scm_i_pthread_key_create (&scm_i_freelist, NULL); | |
1516 | scm_i_pthread_key_create (&scm_i_freelist2, NULL); | |
1517 | ||
1518 | guilify_self_1 (base); | |
9bc4701c MD |
1519 | } |
1520 | ||
d823b11b MV |
1521 | scm_t_bits scm_tc16_thread; |
1522 | scm_t_bits scm_tc16_mutex; | |
1523 | scm_t_bits scm_tc16_condvar; | |
7bfd3b9e | 1524 | |
7bfd3b9e | 1525 | void |
9de87eea | 1526 | scm_init_threads () |
7bfd3b9e | 1527 | { |
9de87eea | 1528 | scm_tc16_thread = scm_make_smob_type ("thread", sizeof (scm_i_thread)); |
d823b11b MV |
1529 | scm_set_smob_mark (scm_tc16_thread, thread_mark); |
1530 | scm_set_smob_print (scm_tc16_thread, thread_print); | |
1531 | scm_set_smob_free (scm_tc16_thread, thread_free); | |
1532 | ||
9de87eea MV |
1533 | scm_tc16_mutex = scm_make_smob_type ("mutex", sizeof (fat_mutex)); |
1534 | scm_set_smob_mark (scm_tc16_mutex, fat_mutex_mark); | |
1535 | scm_set_smob_print (scm_tc16_mutex, fat_mutex_print); | |
1536 | scm_set_smob_free (scm_tc16_mutex, fat_mutex_free); | |
9bc4701c | 1537 | |
9de87eea MV |
1538 | scm_tc16_condvar = scm_make_smob_type ("condition-variable", |
1539 | sizeof (fat_cond)); | |
1540 | scm_set_smob_mark (scm_tc16_condvar, fat_cond_mark); | |
1541 | scm_set_smob_print (scm_tc16_condvar, fat_cond_print); | |
1542 | scm_set_smob_free (scm_tc16_condvar, fat_cond_free); | |
d823b11b | 1543 | |
9de87eea MV |
1544 | scm_i_default_dynamic_state = SCM_BOOL_F; |
1545 | guilify_self_2 (SCM_BOOL_F); | |
9bc4701c | 1546 | threads_initialized_p = 1; |
7bfd3b9e | 1547 | } |
89e00824 | 1548 | |
5f05c406 | 1549 | void |
9de87eea | 1550 | scm_init_threads_default_dynamic_state () |
5f05c406 | 1551 | { |
9de87eea MV |
1552 | SCM state = scm_make_dynamic_state (scm_current_dynamic_state ()); |
1553 | scm_i_default_dynamic_state = scm_permanent_object (state); | |
5f05c406 MV |
1554 | } |
1555 | ||
d823b11b | 1556 | void |
9de87eea | 1557 | scm_init_thread_procs () |
d823b11b | 1558 | { |
9de87eea | 1559 | #include "libguile/threads.x" |
d823b11b MV |
1560 | } |
1561 | ||
89e00824 ML |
1562 | /* |
1563 | Local Variables: | |
1564 | c-file-style: "gnu" | |
1565 | End: | |
1566 | */ |