Commit | Line | Data |
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4c908f2c | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2003, 2004, 2005 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); | |
9de87eea MV |
122 | scm_gc_mark (t->continuation_root); |
123 | return t->dynamic_state; | |
d823b11b MV |
124 | } |
125 | ||
126 | static int | |
127 | thread_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) | |
128 | { | |
9de87eea | 129 | scm_i_thread *t = SCM_I_THREAD_DATA (exp); |
d823b11b | 130 | scm_puts ("#<thread ", port); |
9de87eea | 131 | scm_uintprint ((size_t)t->pthread, 10, port); |
1b92fb6b | 132 | scm_puts (" (", port); |
0345e278 | 133 | scm_uintprint ((scm_t_bits)t, 16, port); |
1b92fb6b | 134 | scm_puts (")>", port); |
d823b11b MV |
135 | return 1; |
136 | } | |
137 | ||
138 | static size_t | |
139 | thread_free (SCM obj) | |
140 | { | |
9de87eea MV |
141 | scm_i_thread *t = SCM_I_THREAD_DATA (obj); |
142 | assert (t->exited); | |
d823b11b MV |
143 | scm_gc_free (t, sizeof (*t), "thread"); |
144 | return 0; | |
145 | } | |
146 | ||
9de87eea | 147 | /*** Blocking on queues. */ |
f7eca35d | 148 | |
9de87eea MV |
149 | /* See also scm_i_queue_async_cell for how such a block is |
150 | interrputed. | |
151 | */ | |
d823b11b | 152 | |
9de87eea MV |
153 | /* Put the current thread on QUEUE and go to sleep, waiting for it to |
154 | be woken up by a call to 'unblock_from_queue', or to be | |
155 | interrupted. Upon return of this function, the current thread is | |
156 | no longer on QUEUE, even when the sleep has been interrupted. | |
157 | ||
158 | The QUEUE data structure is assumed to be protected by MUTEX and | |
159 | the caller of block_self must hold MUTEX. It will be atomically | |
160 | unlocked while sleeping, just as with scm_i_pthread_cond_wait. | |
161 | ||
162 | SLEEP_OBJECT is an arbitrary SCM value that is kept alive as long | |
163 | as MUTEX is needed. | |
164 | ||
165 | When WAITTIME is not NULL, the sleep will be aborted at that time. | |
166 | ||
167 | The return value of block_self is an errno value. It will be zero | |
168 | when the sleep has been successfully completed by a call to | |
169 | unblock_from_queue, EINTR when it has been interrupted by the | |
170 | delivery of a system async, and ETIMEDOUT when the timeout has | |
171 | expired. | |
172 | ||
173 | The system asyncs themselves are not executed by block_self. | |
174 | */ | |
175 | static int | |
176 | block_self (SCM queue, SCM sleep_object, scm_i_pthread_mutex_t *mutex, | |
177 | const scm_t_timespec *waittime) | |
76da80e7 | 178 | { |
9de87eea MV |
179 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
180 | SCM q_handle; | |
181 | int err; | |
182 | ||
183 | if (scm_i_setup_sleep (t, sleep_object, mutex, -1)) | |
184 | err = EINTR; | |
185 | else | |
186 | { | |
187 | t->block_asyncs++; | |
188 | q_handle = enqueue (queue, t->handle); | |
189 | if (waittime == NULL) | |
190 | err = scm_i_scm_pthread_cond_wait (&t->sleep_cond, mutex); | |
191 | else | |
192 | err = scm_i_scm_pthread_cond_timedwait (&t->sleep_cond, mutex, waittime); | |
193 | ||
194 | /* When we are still on QUEUE, we have been interrupted. We | |
195 | report this only when no other error (such as a timeout) has | |
196 | happened above. | |
197 | */ | |
198 | if (remqueue (queue, q_handle) && err == 0) | |
199 | err = EINTR; | |
200 | t->block_asyncs--; | |
201 | scm_i_reset_sleep (t); | |
202 | } | |
203 | ||
204 | return err; | |
76da80e7 | 205 | } |
9de87eea MV |
206 | |
207 | /* Wake up the first thread on QUEUE, if any. The caller must hold | |
208 | the mutex that protects QUEUE. The awoken thread is returned, or | |
209 | #f when the queue was empty. | |
210 | */ | |
211 | static SCM | |
212 | unblock_from_queue (SCM queue) | |
213 | { | |
214 | SCM thread = dequeue (queue); | |
215 | if (scm_is_true (thread)) | |
216 | scm_i_pthread_cond_signal (&SCM_I_THREAD_DATA(thread)->sleep_cond); | |
217 | return thread; | |
218 | } | |
219 | ||
220 | /* Getting into and out of guile mode. | |
221 | */ | |
222 | ||
223 | scm_i_pthread_key_t scm_i_thread_key; | |
224 | ||
d823b11b | 225 | static void |
9de87eea | 226 | resume (scm_i_thread *t) |
d823b11b | 227 | { |
d823b11b | 228 | t->top = NULL; |
9bc4701c MD |
229 | if (t->clear_freelists_p) |
230 | { | |
231 | *SCM_FREELIST_LOC (scm_i_freelist) = SCM_EOL; | |
232 | *SCM_FREELIST_LOC (scm_i_freelist2) = SCM_EOL; | |
233 | t->clear_freelists_p = 0; | |
234 | } | |
d823b11b MV |
235 | } |
236 | ||
76da80e7 | 237 | void |
9de87eea | 238 | scm_enter_guile (scm_t_guile_ticket ticket) |
d823b11b | 239 | { |
9de87eea MV |
240 | scm_i_thread *t = (scm_i_thread *)ticket; |
241 | if (t) | |
242 | { | |
243 | scm_i_pthread_mutex_lock (&t->heap_mutex); | |
244 | resume (t); | |
245 | } | |
d823b11b MV |
246 | } |
247 | ||
9de87eea MV |
248 | static scm_i_thread * |
249 | suspend (void) | |
d823b11b | 250 | { |
9de87eea | 251 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
d823b11b MV |
252 | |
253 | /* record top of stack for the GC */ | |
9de87eea | 254 | t->top = SCM_STACK_PTR (&t); |
d823b11b MV |
255 | /* save registers. */ |
256 | SCM_FLUSH_REGISTER_WINDOWS; | |
9de87eea MV |
257 | setjmp (t->regs); |
258 | return t; | |
d823b11b MV |
259 | } |
260 | ||
9de87eea MV |
261 | scm_t_guile_ticket |
262 | scm_leave_guile () | |
d823b11b | 263 | { |
9de87eea MV |
264 | scm_i_thread *t = suspend (); |
265 | scm_i_pthread_mutex_unlock (&t->heap_mutex); | |
266 | return (scm_t_guile_ticket) t; | |
d823b11b MV |
267 | } |
268 | ||
9de87eea MV |
269 | static scm_i_pthread_mutex_t thread_admin_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
270 | static scm_i_thread *all_threads = NULL; | |
271 | static int thread_count; | |
272 | ||
273 | static SCM scm_i_default_dynamic_state; | |
274 | ||
275 | /* Perform first stage of thread initialisation, in non-guile mode. | |
d823b11b | 276 | */ |
9de87eea MV |
277 | static void |
278 | guilify_self_1 (SCM_STACKITEM *base) | |
d823b11b | 279 | { |
9de87eea MV |
280 | scm_i_thread *t = malloc (sizeof (scm_i_thread)); |
281 | ||
282 | t->pthread = scm_i_pthread_self (); | |
283 | t->handle = SCM_BOOL_F; | |
284 | t->result = SCM_BOOL_F; | |
285 | t->join_queue = SCM_EOL; | |
286 | t->dynamic_state = SCM_BOOL_F; | |
287 | t->dynwinds = SCM_EOL; | |
288 | t->active_asyncs = SCM_EOL; | |
9de87eea MV |
289 | t->block_asyncs = 1; |
290 | t->pending_asyncs = 1; | |
291 | t->last_debug_frame = NULL; | |
292 | t->base = base; | |
0c97d7dd | 293 | t->continuation_root = SCM_EOL; |
9de87eea MV |
294 | t->continuation_base = base; |
295 | scm_i_pthread_cond_init (&t->sleep_cond, NULL); | |
296 | t->sleep_mutex = NULL; | |
297 | t->sleep_object = SCM_BOOL_F; | |
298 | t->sleep_fd = -1; | |
0c97d7dd | 299 | /* XXX - check for errors. */ |
9de87eea MV |
300 | pipe (t->sleep_pipe); |
301 | scm_i_pthread_mutex_init (&t->heap_mutex, NULL); | |
302 | t->clear_freelists_p = 0; | |
1a8fdd7e | 303 | t->gc_running_p = 0; |
9de87eea MV |
304 | t->exited = 0; |
305 | ||
306 | t->freelist = SCM_EOL; | |
307 | t->freelist2 = SCM_EOL; | |
308 | SCM_SET_FREELIST_LOC (scm_i_freelist, &t->freelist); | |
309 | SCM_SET_FREELIST_LOC (scm_i_freelist2, &t->freelist2); | |
310 | ||
311 | scm_i_pthread_setspecific (scm_i_thread_key, t); | |
312 | ||
313 | scm_i_pthread_mutex_lock (&t->heap_mutex); | |
314 | ||
315 | scm_i_pthread_mutex_lock (&thread_admin_mutex); | |
316 | t->next_thread = all_threads; | |
317 | all_threads = t; | |
318 | thread_count++; | |
319 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
d823b11b MV |
320 | } |
321 | ||
9de87eea | 322 | /* Perform second stage of thread initialisation, in guile mode. |
d823b11b | 323 | */ |
9de87eea MV |
324 | static void |
325 | guilify_self_2 (SCM parent) | |
d823b11b | 326 | { |
9de87eea MV |
327 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
328 | ||
329 | SCM_NEWSMOB (t->handle, scm_tc16_thread, t); | |
330 | scm_gc_register_collectable_memory (t, sizeof (scm_i_thread), "thread"); | |
331 | t->continuation_root = scm_cons (t->handle, SCM_EOL); | |
332 | t->continuation_base = t->base; | |
333 | ||
334 | if (scm_is_true (parent)) | |
335 | t->dynamic_state = scm_make_dynamic_state (parent); | |
336 | else | |
337 | t->dynamic_state = scm_i_make_initial_dynamic_state (); | |
338 | ||
339 | t->join_queue = make_queue (); | |
340 | t->block_asyncs = 0; | |
d823b11b MV |
341 | } |
342 | ||
9de87eea | 343 | /* Perform thread tear-down, in guile mode. |
d823b11b | 344 | */ |
9de87eea MV |
345 | static void * |
346 | do_thread_exit (void *v) | |
347 | { | |
0c97d7dd | 348 | scm_i_thread *t = (scm_i_thread *)v; |
9de87eea MV |
349 | |
350 | scm_i_scm_pthread_mutex_lock (&thread_admin_mutex); | |
351 | ||
352 | t->exited = 1; | |
0c97d7dd MV |
353 | close (t->sleep_pipe[0]); |
354 | close (t->sleep_pipe[1]); | |
9de87eea MV |
355 | while (scm_is_true (unblock_from_queue (t->join_queue))) |
356 | ; | |
9de87eea MV |
357 | |
358 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
359 | return NULL; | |
360 | } | |
361 | ||
d823b11b | 362 | static void |
9de87eea | 363 | on_thread_exit (void *v) |
d823b11b | 364 | { |
0c97d7dd MV |
365 | scm_i_thread *t = (scm_i_thread *)v, **tp; |
366 | ||
9de87eea | 367 | scm_i_pthread_setspecific (scm_i_thread_key, v); |
0c97d7dd MV |
368 | |
369 | /* Unblocking the joining threads needs to happen in guile mode | |
370 | since the queue is a SCM data structure. | |
371 | */ | |
9de87eea | 372 | scm_with_guile (do_thread_exit, v); |
0c97d7dd MV |
373 | |
374 | /* Removing ourself from the list of all threads needs to happen in | |
375 | non-guile mode since all SCM values on our stack become | |
376 | unprotected once we are no longer in the list. | |
377 | */ | |
378 | scm_leave_guile (); | |
379 | scm_i_pthread_mutex_lock (&thread_admin_mutex); | |
380 | for (tp = &all_threads; *tp; tp = &(*tp)->next_thread) | |
381 | if (*tp == t) | |
382 | { | |
383 | *tp = t->next_thread; | |
384 | break; | |
385 | } | |
386 | thread_count--; | |
387 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
388 | ||
9de87eea | 389 | scm_i_pthread_setspecific (scm_i_thread_key, NULL); |
d823b11b MV |
390 | } |
391 | ||
9de87eea | 392 | static scm_i_pthread_once_t init_thread_key_once = SCM_I_PTHREAD_ONCE_INIT; |
d823b11b | 393 | |
9de87eea MV |
394 | static void |
395 | init_thread_key (void) | |
396 | { | |
397 | scm_i_pthread_key_create (&scm_i_thread_key, on_thread_exit); | |
398 | } | |
d823b11b | 399 | |
9de87eea MV |
400 | /* Perform any initializations necessary to bring the current thread |
401 | into guile mode, initializing Guile itself, if necessary. | |
a54a94b3 | 402 | |
9de87eea MV |
403 | BASE is the stack base to use with GC. |
404 | ||
405 | PARENT is the dynamic state to use as the parent, ot SCM_BOOL_F in | |
406 | which case the default dynamic state is used. | |
407 | ||
408 | Return zero when the thread was in guile mode already; otherwise | |
409 | return 1. | |
410 | */ | |
411 | ||
412 | static int | |
413 | scm_i_init_thread_for_guile (SCM_STACKITEM *base, SCM parent) | |
d823b11b | 414 | { |
9de87eea MV |
415 | scm_i_thread *t; |
416 | ||
417 | scm_i_pthread_once (&init_thread_key_once, init_thread_key); | |
418 | ||
419 | if ((t = SCM_I_CURRENT_THREAD) == NULL) | |
420 | { | |
421 | /* This thread has not been guilified yet. | |
422 | */ | |
423 | ||
424 | scm_i_pthread_mutex_lock (&scm_i_init_mutex); | |
425 | if (scm_initialized_p == 0) | |
426 | { | |
427 | /* First thread ever to enter Guile. Run the full | |
428 | initialization. | |
429 | */ | |
430 | scm_i_init_guile (base); | |
431 | scm_i_pthread_mutex_unlock (&scm_i_init_mutex); | |
432 | } | |
433 | else | |
434 | { | |
435 | /* Guile is already initialized, but this thread enters it for | |
436 | the first time. Only initialize this thread. | |
437 | */ | |
438 | scm_i_pthread_mutex_unlock (&scm_i_init_mutex); | |
439 | guilify_self_1 (base); | |
440 | guilify_self_2 (parent); | |
441 | } | |
442 | return 1; | |
443 | } | |
444 | else if (t->top) | |
445 | { | |
446 | /* This thread is already guilified but not in guile mode, just | |
447 | resume it. | |
448 | ||
449 | XXX - base might be lower than when this thread was first | |
450 | guilified. | |
451 | */ | |
452 | scm_enter_guile ((scm_t_guile_ticket) t); | |
453 | return 1; | |
454 | } | |
455 | else | |
456 | { | |
457 | /* Thread is already in guile mode. Nothing to do. | |
458 | */ | |
459 | return 0; | |
460 | } | |
d823b11b MV |
461 | } |
462 | ||
9de87eea MV |
463 | #ifdef HAVE_LIBC_STACK_END |
464 | ||
465 | extern void *__libc_stack_end; | |
466 | ||
467 | #if SCM_USE_PTHREAD_THREADS | |
468 | #ifdef HAVE_PTHREAD_ATTR_GETSTACK | |
469 | ||
470 | #define HAVE_GET_THREAD_STACK_BASE | |
471 | ||
472 | static SCM_STACKITEM * | |
473 | get_thread_stack_base () | |
d823b11b | 474 | { |
9de87eea MV |
475 | pthread_attr_t attr; |
476 | void *start, *end; | |
477 | size_t size; | |
478 | ||
479 | /* XXX - pthread_getattr_np from LinuxThreads does not seem to work | |
480 | for the main thread, but we can use __libc_stack_end in that | |
481 | case. | |
482 | */ | |
483 | ||
484 | pthread_getattr_np (pthread_self (), &attr); | |
485 | pthread_attr_getstack (&attr, &start, &size); | |
486 | end = (char *)start + size; | |
487 | ||
488 | if ((void *)&attr < start || (void *)&attr >= end) | |
489 | return __libc_stack_end; | |
490 | else | |
491 | { | |
492 | #if SCM_STACK_GROWS_UP | |
493 | return start; | |
494 | #else | |
495 | return end; | |
496 | #endif | |
497 | } | |
a54a94b3 MV |
498 | } |
499 | ||
9de87eea MV |
500 | #endif /* HAVE_PTHREAD_ATTR_GETSTACK */ |
501 | ||
502 | #else /* !SCM_USE_PTHREAD_THREADS */ | |
503 | ||
504 | #define HAVE_GET_THREAD_STACK_BASE | |
505 | ||
506 | static SCM_STACKITEM * | |
507 | get_thread_stack_base () | |
a54a94b3 | 508 | { |
9de87eea | 509 | return __libc_stack_end; |
d823b11b MV |
510 | } |
511 | ||
9de87eea MV |
512 | #endif /* !SCM_USE_PTHREAD_THREADS */ |
513 | #endif /* HAVE_LIBC_STACK_END */ | |
514 | ||
515 | #ifdef HAVE_GET_THREAD_STACK_BASE | |
516 | ||
517 | void | |
518 | scm_init_guile () | |
d823b11b | 519 | { |
9de87eea MV |
520 | scm_i_init_thread_for_guile (get_thread_stack_base (), |
521 | scm_i_default_dynamic_state); | |
d823b11b MV |
522 | } |
523 | ||
9de87eea MV |
524 | #endif |
525 | ||
526 | void * | |
527 | scm_with_guile (void *(*func)(void *), void *data) | |
528 | { | |
529 | return scm_i_with_guile_and_parent (func, data, | |
530 | scm_i_default_dynamic_state); | |
531 | } | |
532 | ||
533 | void * | |
534 | scm_i_with_guile_and_parent (void *(*func)(void *), void *data, | |
535 | SCM parent) | |
536 | { | |
537 | void *res; | |
538 | int really_entered; | |
539 | SCM_STACKITEM base_item; | |
540 | really_entered = scm_i_init_thread_for_guile (&base_item, parent); | |
541 | res = scm_c_with_continuation_barrier (func, data); | |
542 | if (really_entered) | |
543 | scm_leave_guile (); | |
544 | return res; | |
545 | } | |
546 | ||
547 | void * | |
548 | scm_without_guile (void *(*func)(void *), void *data) | |
d823b11b | 549 | { |
9de87eea MV |
550 | void *res; |
551 | scm_t_guile_ticket t; | |
552 | t = scm_leave_guile (); | |
553 | res = func (data); | |
554 | scm_enter_guile (t); | |
555 | return res; | |
556 | } | |
557 | ||
558 | /*** Thread creation */ | |
559 | ||
560 | typedef struct { | |
561 | SCM parent; | |
562 | SCM thunk; | |
563 | SCM handler; | |
76da80e7 | 564 | SCM thread; |
9de87eea MV |
565 | scm_i_pthread_mutex_t mutex; |
566 | scm_i_pthread_cond_t cond; | |
567 | } launch_data; | |
d823b11b | 568 | |
9de87eea MV |
569 | static void * |
570 | really_launch (void *d) | |
571 | { | |
572 | launch_data *data = (launch_data *)d; | |
573 | SCM thunk = data->thunk, handler = data->handler; | |
574 | scm_i_thread *t; | |
d823b11b | 575 | |
9de87eea | 576 | t = SCM_I_CURRENT_THREAD; |
a54a94b3 | 577 | |
9de87eea MV |
578 | scm_i_scm_pthread_mutex_lock (&data->mutex); |
579 | data->thread = scm_current_thread (); | |
580 | scm_i_pthread_cond_signal (&data->cond); | |
581 | scm_i_pthread_mutex_unlock (&data->mutex); | |
582 | ||
583 | if (SCM_UNBNDP (handler)) | |
584 | t->result = scm_call_0 (thunk); | |
585 | else | |
586 | t->result = scm_catch (SCM_BOOL_T, thunk, handler); | |
587 | ||
588 | return 0; | |
d823b11b MV |
589 | } |
590 | ||
9de87eea MV |
591 | static void * |
592 | launch_thread (void *d) | |
593 | { | |
594 | launch_data *data = (launch_data *)d; | |
595 | scm_i_pthread_detach (scm_i_pthread_self ()); | |
596 | scm_i_with_guile_and_parent (really_launch, d, data->parent); | |
597 | return NULL; | |
598 | } | |
599 | ||
600 | SCM_DEFINE (scm_call_with_new_thread, "call-with-new-thread", 1, 1, 0, | |
d823b11b | 601 | (SCM thunk, SCM handler), |
9de87eea MV |
602 | "Call @code{thunk} in a new thread and with a new dynamic state,\n" |
603 | "returning a new thread object representing the thread. The procedure\n" | |
604 | "@var{thunk} is called via @code{with-continuation-barrier}.\n" | |
605 | "\n" | |
606 | "When @var{handler} is specified, then @var{thunk} is called from\n" | |
607 | "within a @code{catch} with tag @code{#t} that has @var{handler} as its\n" | |
608 | "handler. This catch is established inside the continuation barrier.\n" | |
609 | "\n" | |
610 | "Once @var{thunk} or @var{handler} returns, the return value is made\n" | |
611 | "the @emph{exit value} of the thread and the thread is terminated.") | |
d823b11b MV |
612 | #define FUNC_NAME s_scm_call_with_new_thread |
613 | { | |
9de87eea MV |
614 | launch_data data; |
615 | scm_i_pthread_t id; | |
616 | int err; | |
d823b11b | 617 | |
9de87eea MV |
618 | SCM_ASSERT (scm_is_true (scm_thunk_p (thunk)), thunk, SCM_ARG1, FUNC_NAME); |
619 | SCM_ASSERT (SCM_UNBNDP (handler) || scm_is_true (scm_procedure_p (handler)), | |
620 | handler, SCM_ARG2, FUNC_NAME); | |
621 | ||
622 | data.parent = scm_current_dynamic_state (); | |
623 | data.thunk = thunk; | |
624 | data.handler = handler; | |
625 | data.thread = SCM_BOOL_F; | |
626 | scm_i_pthread_mutex_init (&data.mutex, NULL); | |
627 | scm_i_pthread_cond_init (&data.cond, NULL); | |
628 | ||
629 | scm_i_scm_pthread_mutex_lock (&data.mutex); | |
630 | err = scm_i_pthread_create (&id, NULL, launch_thread, &data); | |
631 | if (err) | |
632 | { | |
633 | scm_i_pthread_mutex_unlock (&data.mutex); | |
634 | errno = err; | |
635 | scm_syserror (NULL); | |
636 | } | |
637 | scm_i_scm_pthread_cond_wait (&data.cond, &data.mutex); | |
638 | scm_i_pthread_mutex_unlock (&data.mutex); | |
639 | ||
640 | return data.thread; | |
d823b11b MV |
641 | } |
642 | #undef FUNC_NAME | |
643 | ||
9de87eea MV |
644 | typedef struct { |
645 | SCM parent; | |
646 | scm_t_catch_body body; | |
647 | void *body_data; | |
648 | scm_t_catch_handler handler; | |
649 | void *handler_data; | |
650 | SCM thread; | |
651 | scm_i_pthread_mutex_t mutex; | |
652 | scm_i_pthread_cond_t cond; | |
653 | } spawn_data; | |
654 | ||
655 | static void * | |
656 | really_spawn (void *d) | |
657 | { | |
658 | spawn_data *data = (spawn_data *)d; | |
659 | scm_t_catch_body body = data->body; | |
660 | void *body_data = data->body_data; | |
661 | scm_t_catch_handler handler = data->handler; | |
662 | void *handler_data = data->handler_data; | |
663 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
664 | ||
665 | scm_i_scm_pthread_mutex_lock (&data->mutex); | |
666 | data->thread = scm_current_thread (); | |
667 | scm_i_pthread_cond_signal (&data->cond); | |
668 | scm_i_pthread_mutex_unlock (&data->mutex); | |
669 | ||
670 | if (handler == NULL) | |
671 | t->result = body (body_data); | |
672 | else | |
673 | t->result = scm_internal_catch (SCM_BOOL_T, | |
674 | body, body_data, | |
675 | handler, handler_data); | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static void * | |
681 | spawn_thread (void *d) | |
682 | { | |
683 | spawn_data *data = (spawn_data *)d; | |
684 | scm_i_pthread_detach (scm_i_pthread_self ()); | |
685 | scm_i_with_guile_and_parent (really_spawn, d, data->parent); | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | SCM | |
690 | scm_spawn_thread (scm_t_catch_body body, void *body_data, | |
691 | scm_t_catch_handler handler, void *handler_data) | |
692 | { | |
693 | spawn_data data; | |
694 | scm_i_pthread_t id; | |
695 | int err; | |
696 | ||
697 | data.parent = scm_current_dynamic_state (); | |
698 | data.body = body; | |
699 | data.body_data = body_data; | |
700 | data.handler = handler; | |
701 | data.handler_data = handler_data; | |
702 | data.thread = SCM_BOOL_F; | |
703 | scm_i_pthread_mutex_init (&data.mutex, NULL); | |
704 | scm_i_pthread_cond_init (&data.cond, NULL); | |
705 | ||
706 | scm_i_scm_pthread_mutex_lock (&data.mutex); | |
707 | err = scm_i_pthread_create (&id, NULL, spawn_thread, &data); | |
708 | if (err) | |
709 | { | |
710 | scm_i_pthread_mutex_unlock (&data.mutex); | |
711 | errno = err; | |
712 | scm_syserror (NULL); | |
713 | } | |
714 | scm_i_scm_pthread_cond_wait (&data.cond, &data.mutex); | |
715 | scm_i_pthread_mutex_unlock (&data.mutex); | |
716 | ||
717 | return data.thread; | |
718 | } | |
719 | ||
29717c89 MD |
720 | SCM_DEFINE (scm_yield, "yield", 0, 0, 0, |
721 | (), | |
722 | "Move the calling thread to the end of the scheduling queue.") | |
723 | #define FUNC_NAME s_scm_yield | |
724 | { | |
9de87eea | 725 | return scm_from_bool (scm_i_sched_yield ()); |
29717c89 MD |
726 | } |
727 | #undef FUNC_NAME | |
728 | ||
d823b11b | 729 | SCM_DEFINE (scm_join_thread, "join-thread", 1, 0, 0, |
5f05c406 | 730 | (SCM thread), |
d823b11b MV |
731 | "Suspend execution of the calling thread until the target @var{thread} " |
732 | "terminates, unless the target @var{thread} has already terminated. ") | |
733 | #define FUNC_NAME s_scm_join_thread | |
5f05c406 | 734 | { |
9de87eea | 735 | scm_i_thread *t; |
d823b11b MV |
736 | SCM res; |
737 | ||
738 | SCM_VALIDATE_THREAD (1, thread); | |
9de87eea | 739 | if (scm_is_eq (scm_current_thread (), thread)) |
d823b11b MV |
740 | SCM_MISC_ERROR ("can not join the current thread", SCM_EOL); |
741 | ||
9de87eea MV |
742 | scm_i_scm_pthread_mutex_lock (&thread_admin_mutex); |
743 | ||
744 | t = SCM_I_THREAD_DATA (thread); | |
d823b11b MV |
745 | if (!t->exited) |
746 | { | |
9de87eea MV |
747 | while (1) |
748 | { | |
749 | block_self (t->join_queue, thread, &thread_admin_mutex, NULL); | |
750 | if (t->exited) | |
751 | break; | |
752 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
753 | SCM_TICK; | |
754 | scm_i_scm_pthread_mutex_lock (&thread_admin_mutex); | |
755 | } | |
d823b11b MV |
756 | } |
757 | res = t->result; | |
9de87eea MV |
758 | |
759 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
d823b11b | 760 | return res; |
5f05c406 MV |
761 | } |
762 | #undef FUNC_NAME | |
763 | ||
9de87eea | 764 | /*** Fat mutexes */ |
4079f87e | 765 | |
d823b11b MV |
766 | /* We implement our own mutex type since we want them to be 'fair', we |
767 | want to do fancy things while waiting for them (like running | |
9de87eea MV |
768 | asyncs) and we might want to add things that are nice for |
769 | debugging. | |
d823b11b | 770 | */ |
4079f87e | 771 | |
9de87eea MV |
772 | typedef struct { |
773 | scm_i_pthread_mutex_t lock; | |
d823b11b | 774 | SCM owner; |
9de87eea MV |
775 | int level; /* how much the owner owns us. |
776 | < 0 for non-recursive mutexes */ | |
777 | SCM waiting; /* the threads waiting for this mutex. */ | |
778 | } fat_mutex; | |
779 | ||
780 | #define SCM_MUTEXP(x) SCM_SMOB_PREDICATE (scm_tc16_mutex, x) | |
781 | #define SCM_MUTEX_DATA(x) ((fat_mutex *) SCM_SMOB_DATA (x)) | |
5f05c406 | 782 | |
d823b11b | 783 | static SCM |
9de87eea | 784 | fat_mutex_mark (SCM mx) |
d823b11b | 785 | { |
9de87eea | 786 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
d823b11b MV |
787 | scm_gc_mark (m->owner); |
788 | return m->waiting; | |
789 | } | |
4079f87e | 790 | |
9de87eea MV |
791 | static size_t |
792 | fat_mutex_free (SCM mx) | |
76da80e7 | 793 | { |
9de87eea MV |
794 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
795 | scm_i_pthread_mutex_destroy (&m->lock); | |
796 | scm_gc_free (m, sizeof (fat_mutex), "mutex"); | |
76da80e7 MV |
797 | return 0; |
798 | } | |
799 | ||
800 | static int | |
9de87eea | 801 | fat_mutex_print (SCM mx, SCM port, scm_print_state *pstate SCM_UNUSED) |
76da80e7 | 802 | { |
9de87eea MV |
803 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
804 | scm_puts ("#<mutex ", port); | |
805 | scm_uintprint ((scm_t_bits)m, 16, port); | |
806 | scm_puts (">", port); | |
807 | return 1; | |
76da80e7 MV |
808 | } |
809 | ||
76da80e7 | 810 | static SCM |
9de87eea | 811 | make_fat_mutex (int recursive) |
76da80e7 | 812 | { |
9de87eea MV |
813 | fat_mutex *m; |
814 | SCM mx; | |
815 | ||
816 | m = scm_gc_malloc (sizeof (fat_mutex), "mutex"); | |
817 | scm_i_pthread_mutex_init (&m->lock, NULL); | |
818 | m->owner = SCM_BOOL_F; | |
819 | m->level = recursive? 0 : -1; | |
820 | m->waiting = SCM_EOL; | |
821 | SCM_NEWSMOB (mx, scm_tc16_mutex, (scm_t_bits) m); | |
822 | m->waiting = make_queue (); | |
823 | return mx; | |
76da80e7 MV |
824 | } |
825 | ||
9de87eea | 826 | SCM_DEFINE (scm_make_mutex, "make-mutex", 0, 0, 0, |
76da80e7 | 827 | (void), |
9de87eea MV |
828 | "Create a new mutex. ") |
829 | #define FUNC_NAME s_scm_make_mutex | |
76da80e7 | 830 | { |
9de87eea | 831 | return make_fat_mutex (0); |
76da80e7 MV |
832 | } |
833 | #undef FUNC_NAME | |
834 | ||
9de87eea | 835 | SCM_DEFINE (scm_make_recursive_mutex, "make-recursive-mutex", 0, 0, 0, |
9bc4701c | 836 | (void), |
9de87eea MV |
837 | "Create a new recursive mutex. ") |
838 | #define FUNC_NAME s_scm_make_recursive_mutex | |
9bc4701c | 839 | { |
9de87eea | 840 | return make_fat_mutex (1); |
9bc4701c MD |
841 | } |
842 | #undef FUNC_NAME | |
843 | ||
9de87eea MV |
844 | static char * |
845 | fat_mutex_lock (SCM mutex) | |
846 | { | |
847 | fat_mutex *m = SCM_MUTEX_DATA (mutex); | |
848 | SCM thread = scm_current_thread (); | |
849 | char *msg = NULL; | |
850 | ||
851 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
852 | if (scm_is_false (m->owner)) | |
853 | m->owner = thread; | |
854 | else if (scm_is_eq (m->owner, thread)) | |
855 | { | |
856 | if (m->level >= 0) | |
857 | m->level++; | |
858 | else | |
859 | msg = "mutex already locked by current thread"; | |
860 | } | |
861 | else | |
862 | { | |
863 | while (1) | |
864 | { | |
865 | block_self (m->waiting, mutex, &m->lock, NULL); | |
866 | if (scm_is_eq (m->owner, thread)) | |
867 | break; | |
868 | scm_i_pthread_mutex_unlock (&m->lock); | |
869 | SCM_TICK; | |
870 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
871 | } | |
872 | } | |
873 | scm_i_pthread_mutex_unlock (&m->lock); | |
874 | return msg; | |
875 | } | |
876 | ||
9bc4701c MD |
877 | SCM_DEFINE (scm_lock_mutex, "lock-mutex", 1, 0, 0, |
878 | (SCM mx), | |
879 | "Lock @var{mutex}. If the mutex is already locked, the calling thread " | |
880 | "blocks until the mutex becomes available. The function returns when " | |
881 | "the calling thread owns the lock on @var{mutex}. Locking a mutex that " | |
882 | "a thread already owns will succeed right away and will not block the " | |
883 | "thread. That is, Guile's mutexes are @emph{recursive}. ") | |
884 | #define FUNC_NAME s_scm_lock_mutex | |
885 | { | |
9de87eea | 886 | char *msg; |
76da80e7 | 887 | |
b01532af | 888 | SCM_VALIDATE_MUTEX (1, mx); |
9de87eea MV |
889 | msg = fat_mutex_lock (mx); |
890 | if (msg) | |
891 | scm_misc_error (NULL, msg, SCM_EOL); | |
76da80e7 | 892 | return SCM_BOOL_T; |
9bc4701c | 893 | } |
76da80e7 | 894 | #undef FUNC_NAME |
9bc4701c | 895 | |
a4d106c7 MV |
896 | void |
897 | scm_frame_lock_mutex (SCM mutex) | |
898 | { | |
899 | scm_frame_unwind_handler_with_scm ((void(*)(SCM))scm_unlock_mutex, mutex, | |
900 | SCM_F_WIND_EXPLICITLY); | |
901 | scm_frame_rewind_handler_with_scm ((void(*)(SCM))scm_lock_mutex, mutex, | |
902 | SCM_F_WIND_EXPLICITLY); | |
903 | } | |
904 | ||
9de87eea MV |
905 | static char * |
906 | fat_mutex_trylock (fat_mutex *m, int *resp) | |
907 | { | |
908 | char *msg = NULL; | |
909 | SCM thread = scm_current_thread (); | |
910 | ||
911 | *resp = 1; | |
912 | scm_i_pthread_mutex_lock (&m->lock); | |
913 | if (scm_is_false (m->owner)) | |
914 | m->owner = thread; | |
915 | else if (scm_is_eq (m->owner, thread)) | |
916 | { | |
917 | if (m->level >= 0) | |
918 | m->level++; | |
919 | else | |
920 | msg = "mutex already locked by current thread"; | |
921 | } | |
922 | else | |
923 | *resp = 0; | |
924 | scm_i_pthread_mutex_unlock (&m->lock); | |
925 | return msg; | |
926 | } | |
927 | ||
9bc4701c | 928 | SCM_DEFINE (scm_try_mutex, "try-mutex", 1, 0, 0, |
ba1b7223 | 929 | (SCM mutex), |
9bc4701c MD |
930 | "Try to lock @var{mutex}. If the mutex is already locked by someone " |
931 | "else, return @code{#f}. Else lock the mutex and return @code{#t}. ") | |
932 | #define FUNC_NAME s_scm_try_mutex | |
933 | { | |
9de87eea MV |
934 | char *msg; |
935 | int res; | |
936 | ||
ba1b7223 | 937 | SCM_VALIDATE_MUTEX (1, mutex); |
9bc4701c | 938 | |
ba1b7223 | 939 | msg = fat_mutex_trylock (SCM_MUTEX_DATA (mutex), &res); |
9de87eea MV |
940 | if (msg) |
941 | scm_misc_error (NULL, msg, SCM_EOL); | |
942 | return scm_from_bool (res); | |
943 | } | |
944 | #undef FUNC_NAME | |
76da80e7 | 945 | |
9de87eea MV |
946 | static char * |
947 | fat_mutex_unlock (fat_mutex *m) | |
948 | { | |
949 | char *msg = NULL; | |
950 | ||
951 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
952 | if (!scm_is_eq (m->owner, scm_current_thread ())) | |
9bc4701c | 953 | { |
9de87eea MV |
954 | if (scm_is_false (m->owner)) |
955 | msg = "mutex not locked"; | |
956 | else | |
957 | msg = "mutex not locked by current thread"; | |
9bc4701c | 958 | } |
9de87eea MV |
959 | else if (m->level > 0) |
960 | m->level--; | |
961 | else | |
962 | m->owner = unblock_from_queue (m->waiting); | |
963 | scm_i_pthread_mutex_unlock (&m->lock); | |
964 | ||
965 | return msg; | |
9bc4701c | 966 | } |
9bc4701c MD |
967 | |
968 | SCM_DEFINE (scm_unlock_mutex, "unlock-mutex", 1, 0, 0, | |
969 | (SCM mx), | |
970 | "Unlocks @var{mutex} if the calling thread owns the lock on " | |
971 | "@var{mutex}. Calling unlock-mutex on a mutex not owned by the current " | |
972 | "thread results in undefined behaviour. Once a mutex has been unlocked, " | |
973 | "one thread blocked on @var{mutex} is awakened and grabs the mutex " | |
974 | "lock. Every call to @code{lock-mutex} by this thread must be matched " | |
975 | "with a call to @code{unlock-mutex}. Only the last call to " | |
976 | "@code{unlock-mutex} will actually unlock the mutex. ") | |
977 | #define FUNC_NAME s_scm_unlock_mutex | |
978 | { | |
9de87eea | 979 | char *msg; |
9bc4701c MD |
980 | SCM_VALIDATE_MUTEX (1, mx); |
981 | ||
9de87eea MV |
982 | msg = fat_mutex_unlock (SCM_MUTEX_DATA (mx)); |
983 | if (msg) | |
984 | scm_misc_error (NULL, msg, SCM_EOL); | |
9bc4701c MD |
985 | return SCM_BOOL_T; |
986 | } | |
987 | #undef FUNC_NAME | |
988 | ||
9de87eea MV |
989 | #if 0 |
990 | ||
991 | SCM_DEFINE (scm_mutex_owner, "mutex-owner", 1, 0, 0, | |
992 | (SCM mx), | |
993 | "Return the thread owning @var{mx}, or @code{#f}.") | |
994 | #define FUNC_NAME s_scm_mutex_owner | |
995 | { | |
996 | SCM_VALIDATE_MUTEX (1, mx); | |
997 | return (SCM_MUTEX_DATA(mx))->owner; | |
998 | } | |
999 | #undef FUNC_NAME | |
1000 | ||
1001 | SCM_DEFINE (scm_mutex_level, "mutex-level", 1, 0, 0, | |
1002 | (SCM mx), | |
1003 | "Return the lock level of a recursive mutex, or -1\n" | |
1004 | "for a standard mutex.") | |
1005 | #define FUNC_NAME s_scm_mutex_level | |
1006 | { | |
1007 | SCM_VALIDATE_MUTEX (1, mx); | |
1008 | return scm_from_int (SCM_MUTEX_DATA(mx)->level); | |
1009 | } | |
1010 | #undef FUNC_NAME | |
1011 | ||
1012 | #endif | |
1013 | ||
1014 | /*** Fat condition variables */ | |
1015 | ||
1016 | typedef struct { | |
1017 | scm_i_pthread_mutex_t lock; | |
1018 | SCM waiting; /* the threads waiting for this condition. */ | |
1019 | } fat_cond; | |
1020 | ||
1021 | #define SCM_CONDVARP(x) SCM_SMOB_PREDICATE (scm_tc16_condvar, x) | |
1022 | #define SCM_CONDVAR_DATA(x) ((fat_cond *) SCM_SMOB_DATA (x)) | |
1023 | ||
1024 | static SCM | |
1025 | fat_cond_mark (SCM cv) | |
1026 | { | |
1027 | fat_cond *c = SCM_CONDVAR_DATA (cv); | |
1028 | return c->waiting; | |
1029 | } | |
1030 | ||
1031 | static size_t | |
1032 | fat_cond_free (SCM mx) | |
1033 | { | |
1034 | fat_cond *c = SCM_CONDVAR_DATA (mx); | |
1035 | scm_i_pthread_mutex_destroy (&c->lock); | |
1036 | scm_gc_free (c, sizeof (fat_cond), "condition-variable"); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | static int | |
1041 | fat_cond_print (SCM cv, SCM port, scm_print_state *pstate SCM_UNUSED) | |
1042 | { | |
1043 | fat_cond *c = SCM_CONDVAR_DATA (cv); | |
1044 | scm_puts ("#<condition-variable ", port); | |
1045 | scm_uintprint ((scm_t_bits)c, 16, port); | |
1046 | scm_puts (">", port); | |
1047 | return 1; | |
1048 | } | |
9bc4701c | 1049 | |
d823b11b MV |
1050 | SCM_DEFINE (scm_make_condition_variable, "make-condition-variable", 0, 0, 0, |
1051 | (void), | |
1052 | "Make a new condition variable.") | |
1053 | #define FUNC_NAME s_scm_make_condition_variable | |
5f05c406 | 1054 | { |
9de87eea MV |
1055 | fat_cond *c; |
1056 | SCM cv; | |
1057 | ||
1058 | c = scm_gc_malloc (sizeof (fat_cond), "condition variable"); | |
1059 | scm_i_pthread_mutex_init (&c->lock, 0); | |
1060 | c->waiting = SCM_EOL; | |
1061 | SCM_NEWSMOB (cv, scm_tc16_condvar, (scm_t_bits) c); | |
1062 | c->waiting = make_queue (); | |
d823b11b | 1063 | return cv; |
5f05c406 | 1064 | } |
d823b11b | 1065 | #undef FUNC_NAME |
5f05c406 | 1066 | |
9de87eea MV |
1067 | static int |
1068 | fat_cond_timedwait (SCM cond, SCM mutex, | |
1069 | const scm_t_timespec *waittime) | |
1070 | { | |
1071 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1072 | fat_cond *c = SCM_CONDVAR_DATA (cond); | |
1073 | fat_mutex *m = SCM_MUTEX_DATA (mutex); | |
1074 | const char *msg; | |
1075 | int err = 0; | |
1076 | ||
1077 | while (1) | |
1078 | { | |
9de87eea MV |
1079 | scm_i_scm_pthread_mutex_lock (&c->lock); |
1080 | msg = fat_mutex_unlock (m); | |
1081 | t->block_asyncs++; | |
1082 | if (msg == NULL) | |
1083 | { | |
1084 | err = block_self (c->waiting, cond, &c->lock, waittime); | |
1085 | scm_i_pthread_mutex_unlock (&c->lock); | |
9de87eea MV |
1086 | fat_mutex_lock (mutex); |
1087 | } | |
1088 | else | |
1089 | scm_i_pthread_mutex_unlock (&c->lock); | |
1090 | t->block_asyncs--; | |
1091 | scm_async_click (); | |
1092 | ||
9de87eea MV |
1093 | if (msg) |
1094 | scm_misc_error (NULL, msg, SCM_EOL); | |
1095 | ||
1096 | scm_remember_upto_here_2 (cond, mutex); | |
1097 | ||
1098 | if (err == 0) | |
1099 | return 1; | |
1100 | if (err == ETIMEDOUT) | |
1101 | return 0; | |
1102 | if (err != EINTR) | |
1103 | { | |
1104 | errno = err; | |
1105 | scm_syserror (NULL); | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | ||
d823b11b MV |
1110 | SCM_DEFINE (scm_timed_wait_condition_variable, "wait-condition-variable", 2, 1, 0, |
1111 | (SCM cv, SCM mx, SCM t), | |
1112 | "Wait until @var{cond-var} has been signalled. While waiting, " | |
1113 | "@var{mutex} is atomically unlocked (as with @code{unlock-mutex}) and " | |
1114 | "is locked again when this function returns. When @var{time} is given, " | |
1115 | "it specifies a point in time where the waiting should be aborted. It " | |
1116 | "can be either a integer as returned by @code{current-time} or a pair " | |
1117 | "as returned by @code{gettimeofday}. When the waiting is aborted the " | |
1118 | "mutex is locked and @code{#f} is returned. When the condition " | |
1119 | "variable is in fact signalled, the mutex is also locked and @code{#t} " | |
1120 | "is returned. ") | |
1121 | #define FUNC_NAME s_scm_timed_wait_condition_variable | |
5f05c406 | 1122 | { |
9de87eea | 1123 | scm_t_timespec waittime, *waitptr = NULL; |
d823b11b MV |
1124 | |
1125 | SCM_VALIDATE_CONDVAR (1, cv); | |
1126 | SCM_VALIDATE_MUTEX (2, mx); | |
9bc4701c | 1127 | |
d823b11b MV |
1128 | if (!SCM_UNBNDP (t)) |
1129 | { | |
d2e53ed6 | 1130 | if (scm_is_pair (t)) |
d823b11b | 1131 | { |
9de87eea MV |
1132 | waittime.tv_sec = scm_to_ulong (SCM_CAR (t)); |
1133 | waittime.tv_nsec = scm_to_ulong (SCM_CAR (t)) * 1000; | |
d823b11b MV |
1134 | } |
1135 | else | |
1136 | { | |
9de87eea | 1137 | waittime.tv_sec = scm_to_ulong (t); |
d823b11b MV |
1138 | waittime.tv_nsec = 0; |
1139 | } | |
9de87eea | 1140 | waitptr = &waittime; |
d823b11b MV |
1141 | } |
1142 | ||
9de87eea | 1143 | return scm_from_bool (fat_cond_timedwait (cv, mx, waitptr)); |
5f05c406 | 1144 | } |
d823b11b | 1145 | #undef FUNC_NAME |
5f05c406 | 1146 | |
9de87eea MV |
1147 | static void |
1148 | fat_cond_signal (fat_cond *c) | |
1149 | { | |
9de87eea MV |
1150 | scm_i_scm_pthread_mutex_lock (&c->lock); |
1151 | unblock_from_queue (c->waiting); | |
1152 | scm_i_pthread_mutex_unlock (&c->lock); | |
1153 | } | |
1154 | ||
d823b11b MV |
1155 | SCM_DEFINE (scm_signal_condition_variable, "signal-condition-variable", 1, 0, 0, |
1156 | (SCM cv), | |
1157 | "Wake up one thread that is waiting for @var{cv}") | |
1158 | #define FUNC_NAME s_scm_signal_condition_variable | |
5f05c406 | 1159 | { |
d823b11b | 1160 | SCM_VALIDATE_CONDVAR (1, cv); |
9de87eea | 1161 | fat_cond_signal (SCM_CONDVAR_DATA (cv)); |
d823b11b | 1162 | return SCM_BOOL_T; |
5f05c406 | 1163 | } |
d823b11b | 1164 | #undef FUNC_NAME |
5f05c406 | 1165 | |
9de87eea MV |
1166 | static void |
1167 | fat_cond_broadcast (fat_cond *c) | |
1168 | { | |
1169 | scm_i_scm_pthread_mutex_lock (&c->lock); | |
1170 | while (scm_is_true (unblock_from_queue (c->waiting))) | |
1171 | ; | |
1172 | scm_i_pthread_mutex_unlock (&c->lock); | |
1173 | } | |
1174 | ||
d823b11b MV |
1175 | SCM_DEFINE (scm_broadcast_condition_variable, "broadcast-condition-variable", 1, 0, 0, |
1176 | (SCM cv), | |
1177 | "Wake up all threads that are waiting for @var{cv}. ") | |
1178 | #define FUNC_NAME s_scm_broadcast_condition_variable | |
5f05c406 | 1179 | { |
d823b11b | 1180 | SCM_VALIDATE_CONDVAR (1, cv); |
9de87eea | 1181 | fat_cond_broadcast (SCM_CONDVAR_DATA (cv)); |
d823b11b | 1182 | return SCM_BOOL_T; |
5f05c406 | 1183 | } |
d823b11b | 1184 | #undef FUNC_NAME |
5f05c406 | 1185 | |
d823b11b MV |
1186 | /*** Marking stacks */ |
1187 | ||
1188 | /* XXX - what to do with this? Do we need to handle this for blocked | |
1189 | threads as well? | |
1190 | */ | |
1191 | #ifdef __ia64__ | |
1192 | # define SCM_MARK_BACKING_STORE() do { \ | |
1193 | ucontext_t ctx; \ | |
1194 | SCM_STACKITEM * top, * bot; \ | |
1195 | getcontext (&ctx); \ | |
1196 | scm_mark_locations ((SCM_STACKITEM *) &ctx.uc_mcontext, \ | |
1197 | ((size_t) (sizeof (SCM_STACKITEM) - 1 + sizeof ctx.uc_mcontext) \ | |
1198 | / sizeof (SCM_STACKITEM))); \ | |
1199 | bot = (SCM_STACKITEM *) __libc_ia64_register_backing_store_base; \ | |
1200 | top = (SCM_STACKITEM *) ctx.uc_mcontext.sc_ar_bsp; \ | |
1201 | scm_mark_locations (bot, top - bot); } while (0) | |
1202 | #else | |
1203 | # define SCM_MARK_BACKING_STORE() | |
1204 | #endif | |
1205 | ||
1206 | void | |
1207 | scm_threads_mark_stacks (void) | |
5f05c406 | 1208 | { |
9de87eea MV |
1209 | scm_i_thread *t; |
1210 | for (t = all_threads; t; t = t->next_thread) | |
d823b11b | 1211 | { |
9de87eea MV |
1212 | /* Check that thread has indeed been suspended. |
1213 | */ | |
1214 | assert (t->top); | |
6087fad9 | 1215 | |
9de87eea | 1216 | scm_gc_mark (t->handle); |
6087fad9 | 1217 | |
d028af45 | 1218 | #if SCM_STACK_GROWS_UP |
9de87eea | 1219 | scm_mark_locations (t->base, t->top - t->base); |
d823b11b | 1220 | #else |
9de87eea | 1221 | scm_mark_locations (t->top, t->base - t->top); |
d823b11b | 1222 | #endif |
6087fad9 MV |
1223 | scm_mark_locations ((SCM_STACKITEM *) t->regs, |
1224 | ((size_t) sizeof(t->regs) | |
1225 | / sizeof (SCM_STACKITEM))); | |
d823b11b | 1226 | } |
59152722 MV |
1227 | |
1228 | SCM_MARK_BACKING_STORE (); | |
5f05c406 MV |
1229 | } |
1230 | ||
d823b11b MV |
1231 | /*** Select */ |
1232 | ||
911782b7 | 1233 | int |
9de87eea MV |
1234 | scm_std_select (int nfds, |
1235 | SELECT_TYPE *readfds, | |
1236 | SELECT_TYPE *writefds, | |
1237 | SELECT_TYPE *exceptfds, | |
1238 | struct timeval *timeout) | |
1239 | { | |
1240 | fd_set my_readfds; | |
1241 | int res, eno, wakeup_fd; | |
1242 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1243 | scm_t_guile_ticket ticket; | |
1244 | ||
1245 | if (readfds == NULL) | |
1246 | { | |
1247 | FD_ZERO (&my_readfds); | |
1248 | readfds = &my_readfds; | |
1249 | } | |
1250 | ||
1251 | while (scm_i_setup_sleep (t, SCM_BOOL_F, NULL, t->sleep_pipe[1])) | |
1252 | SCM_TICK; | |
1253 | ||
1254 | wakeup_fd = t->sleep_pipe[0]; | |
1255 | ticket = scm_leave_guile (); | |
1256 | FD_SET (wakeup_fd, readfds); | |
1257 | if (wakeup_fd >= nfds) | |
1258 | nfds = wakeup_fd+1; | |
1259 | res = select (nfds, readfds, writefds, exceptfds, timeout); | |
1260 | t->sleep_fd = -1; | |
d823b11b | 1261 | eno = errno; |
9de87eea MV |
1262 | scm_enter_guile (ticket); |
1263 | ||
1264 | scm_i_reset_sleep (t); | |
1265 | ||
1266 | if (res > 0 && FD_ISSET (wakeup_fd, readfds)) | |
1267 | { | |
1268 | char dummy; | |
1269 | read (wakeup_fd, &dummy, 1); | |
1270 | FD_CLR (wakeup_fd, readfds); | |
1271 | res -= 1; | |
1272 | if (res == 0) | |
1273 | { | |
1274 | eno = EINTR; | |
1275 | res = -1; | |
1276 | } | |
1277 | } | |
d823b11b MV |
1278 | errno = eno; |
1279 | return res; | |
5f05c406 MV |
1280 | } |
1281 | ||
9de87eea | 1282 | /* Convenience API for blocking while in guile mode. */ |
76da80e7 | 1283 | |
9de87eea | 1284 | #if SCM_USE_PTHREAD_THREADS |
92e64b87 | 1285 | |
9bc4701c | 1286 | int |
9de87eea | 1287 | scm_pthread_mutex_lock (scm_i_pthread_mutex_t *mutex) |
9bc4701c | 1288 | { |
9de87eea MV |
1289 | scm_t_guile_ticket t = scm_leave_guile (); |
1290 | int res = scm_i_pthread_mutex_lock (mutex); | |
1291 | scm_enter_guile (t); | |
9bc4701c MD |
1292 | return res; |
1293 | } | |
1294 | ||
9de87eea MV |
1295 | static void |
1296 | unlock (void *data) | |
28d52ebb | 1297 | { |
9de87eea | 1298 | scm_i_pthread_mutex_unlock ((scm_i_pthread_mutex_t *)data); |
28d52ebb MD |
1299 | } |
1300 | ||
1301 | void | |
9de87eea | 1302 | scm_frame_pthread_mutex_lock (scm_i_pthread_mutex_t *mutex) |
28d52ebb | 1303 | { |
9de87eea MV |
1304 | scm_i_scm_pthread_mutex_lock (mutex); |
1305 | scm_frame_unwind_handler (unlock, mutex, SCM_F_WIND_EXPLICITLY); | |
28d52ebb MD |
1306 | } |
1307 | ||
9bc4701c | 1308 | int |
9de87eea | 1309 | scm_pthread_cond_wait (scm_i_pthread_cond_t *cond, scm_i_pthread_mutex_t *mutex) |
9bc4701c | 1310 | { |
9de87eea MV |
1311 | scm_t_guile_ticket t = scm_leave_guile (); |
1312 | int res = scm_i_pthread_cond_wait (cond, mutex); | |
1313 | scm_enter_guile (t); | |
9bc4701c MD |
1314 | return res; |
1315 | } | |
9bc4701c | 1316 | |
76da80e7 | 1317 | int |
9de87eea MV |
1318 | scm_pthread_cond_timedwait (scm_i_pthread_cond_t *cond, |
1319 | scm_i_pthread_mutex_t *mutex, | |
1320 | const scm_t_timespec *wt) | |
76da80e7 | 1321 | { |
9de87eea MV |
1322 | scm_t_guile_ticket t = scm_leave_guile (); |
1323 | int res = scm_i_pthread_cond_timedwait (cond, mutex, wt); | |
1324 | scm_enter_guile (t); | |
1325 | return res; | |
76da80e7 MV |
1326 | } |
1327 | ||
9de87eea | 1328 | #endif |
76da80e7 | 1329 | |
d823b11b | 1330 | unsigned long |
9de87eea | 1331 | scm_std_usleep (unsigned long usecs) |
5f05c406 | 1332 | { |
d823b11b MV |
1333 | struct timeval tv; |
1334 | tv.tv_usec = usecs % 1000000; | |
1335 | tv.tv_sec = usecs / 1000000; | |
9de87eea MV |
1336 | scm_std_select (0, NULL, NULL, NULL, &tv); |
1337 | return tv.tv_sec * 1000000 + tv.tv_usec; | |
5f05c406 MV |
1338 | } |
1339 | ||
9de87eea MV |
1340 | unsigned int |
1341 | scm_std_sleep (unsigned int secs) | |
6c214b62 | 1342 | { |
d823b11b MV |
1343 | struct timeval tv; |
1344 | tv.tv_usec = 0; | |
1345 | tv.tv_sec = secs; | |
9de87eea | 1346 | scm_std_select (0, NULL, NULL, NULL, &tv); |
d823b11b | 1347 | return tv.tv_sec; |
6c214b62 MD |
1348 | } |
1349 | ||
d823b11b MV |
1350 | /*** Misc */ |
1351 | ||
1352 | SCM_DEFINE (scm_current_thread, "current-thread", 0, 0, 0, | |
1353 | (void), | |
1354 | "Return the thread that called this function.") | |
1355 | #define FUNC_NAME s_scm_current_thread | |
1356 | { | |
9de87eea | 1357 | return SCM_I_CURRENT_THREAD->handle; |
d823b11b MV |
1358 | } |
1359 | #undef FUNC_NAME | |
1360 | ||
9de87eea MV |
1361 | static SCM |
1362 | scm_c_make_list (size_t n, SCM fill) | |
1363 | { | |
1364 | SCM res = SCM_EOL; | |
1365 | while (n-- > 0) | |
1366 | res = scm_cons (fill, res); | |
1367 | return res; | |
1368 | } | |
1369 | ||
d823b11b MV |
1370 | SCM_DEFINE (scm_all_threads, "all-threads", 0, 0, 0, |
1371 | (void), | |
1372 | "Return a list of all threads.") | |
9bc4701c | 1373 | #define FUNC_NAME s_scm_all_threads |
d823b11b | 1374 | { |
9de87eea MV |
1375 | /* We can not allocate while holding the thread_admin_mutex because |
1376 | of the way GC is done. | |
1377 | */ | |
1378 | int n = thread_count; | |
1379 | scm_i_thread *t; | |
1380 | SCM list = scm_c_make_list (n, SCM_UNSPECIFIED), *l; | |
d823b11b | 1381 | |
9de87eea MV |
1382 | scm_i_pthread_mutex_lock (&thread_admin_mutex); |
1383 | l = &list; | |
1384 | for (t = all_threads; t && n > 0; t = t->next_thread) | |
1385 | { | |
1386 | SCM_SETCAR (*l, t->handle); | |
1387 | l = SCM_CDRLOC (*l); | |
1388 | n--; | |
1389 | } | |
1390 | *l = SCM_EOL; | |
1391 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
1392 | return list; | |
d823b11b | 1393 | } |
9de87eea | 1394 | #undef FUNC_NAME |
d823b11b MV |
1395 | |
1396 | SCM_DEFINE (scm_thread_exited_p, "thread-exited?", 1, 0, 0, | |
1397 | (SCM thread), | |
1398 | "Return @code{#t} iff @var{thread} has exited.\n") | |
1399 | #define FUNC_NAME s_scm_thread_exited_p | |
1400 | { | |
7888309b | 1401 | return scm_from_bool (scm_c_thread_exited_p (thread)); |
d823b11b MV |
1402 | } |
1403 | #undef FUNC_NAME | |
1404 | ||
911782b7 | 1405 | int |
d823b11b MV |
1406 | scm_c_thread_exited_p (SCM thread) |
1407 | #define FUNC_NAME s_scm_thread_exited_p | |
5f05c406 | 1408 | { |
9de87eea | 1409 | scm_i_thread *t; |
d823b11b | 1410 | SCM_VALIDATE_THREAD (1, thread); |
9de87eea | 1411 | t = SCM_I_THREAD_DATA (thread); |
d823b11b | 1412 | return t->exited; |
5f05c406 | 1413 | } |
d823b11b | 1414 | #undef FUNC_NAME |
5f05c406 | 1415 | |
9de87eea | 1416 | static scm_i_pthread_cond_t wake_up_cond; |
9bc4701c | 1417 | int scm_i_thread_go_to_sleep; |
9bc4701c MD |
1418 | static int threads_initialized_p = 0; |
1419 | ||
1420 | void | |
1421 | scm_i_thread_put_to_sleep () | |
1422 | { | |
6087fad9 | 1423 | if (threads_initialized_p) |
9bc4701c | 1424 | { |
9de87eea | 1425 | scm_i_thread *t; |
6087fad9 | 1426 | |
9de87eea MV |
1427 | scm_leave_guile (); |
1428 | scm_i_pthread_mutex_lock (&thread_admin_mutex); | |
1429 | ||
0c97d7dd MV |
1430 | /* Signal all threads to go to sleep |
1431 | */ | |
1432 | scm_i_thread_go_to_sleep = 1; | |
1433 | for (t = all_threads; t; t = t->next_thread) | |
1434 | scm_i_pthread_mutex_lock (&t->heap_mutex); | |
1435 | scm_i_thread_go_to_sleep = 0; | |
9bc4701c MD |
1436 | } |
1437 | } | |
1438 | ||
b0dc3d71 MD |
1439 | void |
1440 | scm_i_thread_invalidate_freelists () | |
1441 | { | |
9de87eea MV |
1442 | /* thread_admin_mutex is already locked. */ |
1443 | ||
1444 | scm_i_thread *t; | |
1445 | for (t = all_threads; t; t = t->next_thread) | |
1446 | if (t != SCM_I_CURRENT_THREAD) | |
1447 | t->clear_freelists_p = 1; | |
b0dc3d71 MD |
1448 | } |
1449 | ||
9bc4701c MD |
1450 | void |
1451 | scm_i_thread_wake_up () | |
1452 | { | |
6087fad9 | 1453 | if (threads_initialized_p) |
9bc4701c | 1454 | { |
9de87eea | 1455 | scm_i_thread *t; |
9de87eea | 1456 | |
0c97d7dd MV |
1457 | scm_i_pthread_cond_broadcast (&wake_up_cond); |
1458 | for (t = all_threads; t; t = t->next_thread) | |
1459 | scm_i_pthread_mutex_unlock (&t->heap_mutex); | |
9de87eea MV |
1460 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); |
1461 | scm_enter_guile ((scm_t_guile_ticket) SCM_I_CURRENT_THREAD); | |
9bc4701c | 1462 | } |
9bc4701c MD |
1463 | } |
1464 | ||
1465 | void | |
1466 | scm_i_thread_sleep_for_gc () | |
1467 | { | |
9de87eea MV |
1468 | scm_i_thread *t = suspend (); |
1469 | scm_i_pthread_cond_wait (&wake_up_cond, &t->heap_mutex); | |
b0dc3d71 | 1470 | resume (t); |
9bc4701c MD |
1471 | } |
1472 | ||
a4d106c7 MV |
1473 | /* This mutex is used by SCM_CRITICAL_SECTION_START/END. |
1474 | */ | |
9de87eea | 1475 | scm_i_pthread_mutex_t scm_i_critical_section_mutex = |
a4d106c7 MV |
1476 | SCM_I_PTHREAD_RECURSIVE_MUTEX_INITIALIZER; |
1477 | int scm_i_critical_section_level = 0; | |
1478 | ||
1479 | static SCM framed_critical_section_mutex; | |
a54a94b3 | 1480 | |
9bc4701c | 1481 | void |
a4d106c7 | 1482 | scm_frame_critical_section (SCM mutex) |
76da80e7 | 1483 | { |
a4d106c7 MV |
1484 | if (scm_is_false (mutex)) |
1485 | mutex = framed_critical_section_mutex; | |
1486 | scm_frame_lock_mutex (mutex); | |
9de87eea MV |
1487 | scm_frame_block_asyncs (); |
1488 | } | |
1489 | ||
1490 | /*** Initialization */ | |
1491 | ||
1492 | scm_i_pthread_key_t scm_i_freelist, scm_i_freelist2; | |
1493 | scm_i_pthread_mutex_t scm_i_misc_mutex; | |
1494 | ||
1495 | void | |
1496 | scm_threads_prehistory (SCM_STACKITEM *base) | |
1497 | { | |
9de87eea MV |
1498 | scm_i_pthread_mutex_init (&scm_i_misc_mutex, NULL); |
1499 | scm_i_pthread_cond_init (&wake_up_cond, NULL); | |
9de87eea MV |
1500 | scm_i_pthread_key_create (&scm_i_freelist, NULL); |
1501 | scm_i_pthread_key_create (&scm_i_freelist2, NULL); | |
1502 | ||
1503 | guilify_self_1 (base); | |
9bc4701c MD |
1504 | } |
1505 | ||
d823b11b MV |
1506 | scm_t_bits scm_tc16_thread; |
1507 | scm_t_bits scm_tc16_mutex; | |
1508 | scm_t_bits scm_tc16_condvar; | |
7bfd3b9e | 1509 | |
7bfd3b9e | 1510 | void |
9de87eea | 1511 | scm_init_threads () |
7bfd3b9e | 1512 | { |
9de87eea | 1513 | scm_tc16_thread = scm_make_smob_type ("thread", sizeof (scm_i_thread)); |
d823b11b MV |
1514 | scm_set_smob_mark (scm_tc16_thread, thread_mark); |
1515 | scm_set_smob_print (scm_tc16_thread, thread_print); | |
1516 | scm_set_smob_free (scm_tc16_thread, thread_free); | |
1517 | ||
9de87eea MV |
1518 | scm_tc16_mutex = scm_make_smob_type ("mutex", sizeof (fat_mutex)); |
1519 | scm_set_smob_mark (scm_tc16_mutex, fat_mutex_mark); | |
1520 | scm_set_smob_print (scm_tc16_mutex, fat_mutex_print); | |
1521 | scm_set_smob_free (scm_tc16_mutex, fat_mutex_free); | |
9bc4701c | 1522 | |
9de87eea MV |
1523 | scm_tc16_condvar = scm_make_smob_type ("condition-variable", |
1524 | sizeof (fat_cond)); | |
1525 | scm_set_smob_mark (scm_tc16_condvar, fat_cond_mark); | |
1526 | scm_set_smob_print (scm_tc16_condvar, fat_cond_print); | |
1527 | scm_set_smob_free (scm_tc16_condvar, fat_cond_free); | |
d823b11b | 1528 | |
9de87eea MV |
1529 | scm_i_default_dynamic_state = SCM_BOOL_F; |
1530 | guilify_self_2 (SCM_BOOL_F); | |
9bc4701c | 1531 | threads_initialized_p = 1; |
a4d106c7 MV |
1532 | |
1533 | framed_critical_section_mutex = | |
1534 | scm_permanent_object (scm_make_recursive_mutex ()); | |
7bfd3b9e | 1535 | } |
89e00824 | 1536 | |
5f05c406 | 1537 | void |
9de87eea | 1538 | scm_init_threads_default_dynamic_state () |
5f05c406 | 1539 | { |
9de87eea MV |
1540 | SCM state = scm_make_dynamic_state (scm_current_dynamic_state ()); |
1541 | scm_i_default_dynamic_state = scm_permanent_object (state); | |
5f05c406 MV |
1542 | } |
1543 | ||
d823b11b | 1544 | void |
9de87eea | 1545 | scm_init_thread_procs () |
d823b11b | 1546 | { |
9de87eea | 1547 | #include "libguile/threads.x" |
d823b11b MV |
1548 | } |
1549 | ||
89e00824 ML |
1550 | /* |
1551 | Local Variables: | |
1552 | c-file-style: "gnu" | |
1553 | End: | |
1554 | */ |