Commit | Line | Data |
---|---|---|
cde24ce1 | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
74926120 | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
7bfd3b9e | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
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 | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
7bfd3b9e | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
7bfd3b9e | 24 | |
1c44468d | 25 | #include "libguile/bdw-gc.h" |
1810dc4e RB |
26 | #include "libguile/_scm.h" |
27 | ||
fcc5d734 | 28 | #if HAVE_UNISTD_H |
d823b11b | 29 | #include <unistd.h> |
fcc5d734 | 30 | #endif |
d823b11b | 31 | #include <stdio.h> |
8ab3d8a0 KR |
32 | |
33 | #ifdef HAVE_STRING_H | |
34 | #include <string.h> /* for memset used by FD_ZERO on Solaris 10 */ | |
35 | #endif | |
36 | ||
fcc5d734 | 37 | #if HAVE_SYS_TIME_H |
d823b11b | 38 | #include <sys/time.h> |
fcc5d734 | 39 | #endif |
5f05c406 | 40 | |
f57fdf07 LC |
41 | #include <assert.h> |
42 | ||
d823b11b MV |
43 | #include "libguile/validate.h" |
44 | #include "libguile/root.h" | |
45 | #include "libguile/eval.h" | |
46 | #include "libguile/async.h" | |
47 | #include "libguile/ports.h" | |
48 | #include "libguile/threads.h" | |
a0599745 | 49 | #include "libguile/dynwind.h" |
d823b11b | 50 | #include "libguile/iselect.h" |
9de87eea MV |
51 | #include "libguile/fluids.h" |
52 | #include "libguile/continuations.h" | |
2b829bbb | 53 | #include "libguile/gc.h" |
9de87eea | 54 | #include "libguile/init.h" |
2e77f720 | 55 | #include "libguile/scmsigs.h" |
6180e336 | 56 | #include "libguile/strings.h" |
a0faf7dd | 57 | #include "libguile/weaks.h" |
7bfd3b9e | 58 | |
ecc9f40f MV |
59 | #ifdef __MINGW32__ |
60 | #ifndef ETIMEDOUT | |
61 | # define ETIMEDOUT WSAETIMEDOUT | |
62 | #endif | |
63 | # include <fcntl.h> | |
64 | # include <process.h> | |
65 | # define pipe(fd) _pipe (fd, 256, O_BINARY) | |
66 | #endif /* __MINGW32__ */ | |
67 | ||
634aa8de LC |
68 | #include <full-read.h> |
69 | ||
cde24ce1 AW |
70 | |
71 | \f | |
72 | ||
73 | /* First some libgc shims. */ | |
74 | ||
75 | /* Make sure GC_fn_type is defined; it is missing from the public | |
76 | headers of GC 7.1 and earlier. */ | |
77 | #ifndef HAVE_GC_FN_TYPE | |
78 | typedef void * (* GC_fn_type) (void *); | |
79 | #endif | |
80 | ||
81 | ||
82 | /* Now define with_gc_active and with_gc_inactive. */ | |
83 | ||
84 | #if (defined(HAVE_GC_DO_BLOCKING) && defined (HAVE_DECL_GC_DO_BLOCKING) && defined (HAVE_GC_CALL_WITH_GC_ACTIVE)) | |
85 | ||
86 | /* We have a sufficiently new libgc (7.2 or newer). */ | |
87 | ||
88 | static void* | |
89 | with_gc_inactive (GC_fn_type func, void *data) | |
90 | { | |
91 | return GC_do_blocking (func, data); | |
92 | } | |
93 | ||
94 | static void* | |
95 | with_gc_active (GC_fn_type func, void *data) | |
96 | { | |
97 | return GC_call_with_gc_active (func, data); | |
98 | } | |
99 | ||
100 | #else | |
101 | ||
102 | /* libgc not new enough, so never actually deactivate GC. | |
103 | ||
104 | Note that though GC 7.1 does have a GC_do_blocking, it doesn't have | |
105 | GC_call_with_gc_active. */ | |
106 | ||
107 | static void* | |
108 | with_gc_inactive (GC_fn_type func, void *data) | |
109 | { | |
110 | return func (data); | |
111 | } | |
112 | ||
113 | static void* | |
114 | with_gc_active (GC_fn_type func, void *data) | |
115 | { | |
116 | return func (data); | |
117 | } | |
118 | ||
119 | #endif /* HAVE_GC_DO_BLOCKING */ | |
120 | ||
121 | ||
634aa8de | 122 | \f |
6180e336 NJ |
123 | static void |
124 | to_timespec (SCM t, scm_t_timespec *waittime) | |
125 | { | |
126 | if (scm_is_pair (t)) | |
127 | { | |
128 | waittime->tv_sec = scm_to_ulong (SCM_CAR (t)); | |
129 | waittime->tv_nsec = scm_to_ulong (SCM_CDR (t)) * 1000; | |
130 | } | |
131 | else | |
132 | { | |
133 | double time = scm_to_double (t); | |
134 | double sec = scm_c_truncate (time); | |
135 | ||
136 | waittime->tv_sec = (long) sec; | |
2a1d0688 | 137 | waittime->tv_nsec = (long) ((time - sec) * 1000000000); |
6180e336 NJ |
138 | } |
139 | } | |
140 | ||
c058db8a | 141 | \f |
d823b11b | 142 | /*** Queues */ |
7bfd3b9e | 143 | |
c058db8a LC |
144 | /* Note: We annotate with "GC-robust" assignments whose purpose is to avoid |
145 | the risk of false references leading to unbounded retained space as | |
146 | described in "Bounding Space Usage of Conservative Garbage Collectors", | |
147 | H.J. Boehm, 2001. */ | |
148 | ||
9de87eea MV |
149 | /* Make an empty queue data structure. |
150 | */ | |
d823b11b MV |
151 | static SCM |
152 | make_queue () | |
153 | { | |
154 | return scm_cons (SCM_EOL, SCM_EOL); | |
155 | } | |
7bfd3b9e | 156 | |
9de87eea MV |
157 | /* Put T at the back of Q and return a handle that can be used with |
158 | remqueue to remove T from Q again. | |
159 | */ | |
d823b11b MV |
160 | static SCM |
161 | enqueue (SCM q, SCM t) | |
162 | { | |
163 | SCM c = scm_cons (t, SCM_EOL); | |
d2a51087 | 164 | SCM_CRITICAL_SECTION_START; |
d2e53ed6 | 165 | if (scm_is_null (SCM_CDR (q))) |
d823b11b MV |
166 | SCM_SETCDR (q, c); |
167 | else | |
168 | SCM_SETCDR (SCM_CAR (q), c); | |
169 | SCM_SETCAR (q, c); | |
d2a51087 | 170 | SCM_CRITICAL_SECTION_END; |
d823b11b MV |
171 | return c; |
172 | } | |
7bfd3b9e | 173 | |
9de87eea MV |
174 | /* Remove the element that the handle C refers to from the queue Q. C |
175 | must have been returned from a call to enqueue. The return value | |
176 | is zero when the element referred to by C has already been removed. | |
177 | Otherwise, 1 is returned. | |
178 | */ | |
179 | static int | |
d823b11b MV |
180 | remqueue (SCM q, SCM c) |
181 | { | |
182 | SCM p, prev = q; | |
d2a51087 | 183 | SCM_CRITICAL_SECTION_START; |
d2e53ed6 | 184 | for (p = SCM_CDR (q); !scm_is_null (p); p = SCM_CDR (p)) |
d823b11b | 185 | { |
bc36d050 | 186 | if (scm_is_eq (p, c)) |
d823b11b | 187 | { |
bc36d050 | 188 | if (scm_is_eq (c, SCM_CAR (q))) |
d823b11b MV |
189 | SCM_SETCAR (q, SCM_CDR (c)); |
190 | SCM_SETCDR (prev, SCM_CDR (c)); | |
c058db8a LC |
191 | |
192 | /* GC-robust */ | |
193 | SCM_SETCDR (c, SCM_EOL); | |
194 | ||
d2a51087 | 195 | SCM_CRITICAL_SECTION_END; |
9de87eea | 196 | return 1; |
d823b11b MV |
197 | } |
198 | prev = p; | |
199 | } | |
d2a51087 | 200 | SCM_CRITICAL_SECTION_END; |
9de87eea | 201 | return 0; |
d823b11b MV |
202 | } |
203 | ||
9de87eea MV |
204 | /* Remove the front-most element from the queue Q and return it. |
205 | Return SCM_BOOL_F when Q is empty. | |
206 | */ | |
d823b11b MV |
207 | static SCM |
208 | dequeue (SCM q) | |
209 | { | |
d2a51087 NJ |
210 | SCM c; |
211 | SCM_CRITICAL_SECTION_START; | |
212 | c = SCM_CDR (q); | |
d2e53ed6 | 213 | if (scm_is_null (c)) |
d2a51087 NJ |
214 | { |
215 | SCM_CRITICAL_SECTION_END; | |
216 | return SCM_BOOL_F; | |
217 | } | |
d823b11b MV |
218 | else |
219 | { | |
220 | SCM_SETCDR (q, SCM_CDR (c)); | |
d2e53ed6 | 221 | if (scm_is_null (SCM_CDR (q))) |
d823b11b | 222 | SCM_SETCAR (q, SCM_EOL); |
d2a51087 | 223 | SCM_CRITICAL_SECTION_END; |
c058db8a LC |
224 | |
225 | /* GC-robust */ | |
226 | SCM_SETCDR (c, SCM_EOL); | |
227 | ||
d823b11b MV |
228 | return SCM_CAR (c); |
229 | } | |
230 | } | |
7bfd3b9e | 231 | |
9de87eea | 232 | /*** Thread smob routines */ |
76da80e7 | 233 | |
d823b11b MV |
234 | |
235 | static int | |
236 | thread_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) | |
237 | { | |
23d72566 KR |
238 | /* On a Gnu system pthread_t is an unsigned long, but on mingw it's a |
239 | struct. A cast like "(unsigned long) t->pthread" is a syntax error in | |
240 | the struct case, hence we go via a union, and extract according to the | |
241 | size of pthread_t. */ | |
242 | union { | |
243 | scm_i_pthread_t p; | |
244 | unsigned short us; | |
245 | unsigned int ui; | |
246 | unsigned long ul; | |
247 | scm_t_uintmax um; | |
248 | } u; | |
9de87eea | 249 | scm_i_thread *t = SCM_I_THREAD_DATA (exp); |
23d72566 KR |
250 | scm_i_pthread_t p = t->pthread; |
251 | scm_t_uintmax id; | |
252 | u.p = p; | |
253 | if (sizeof (p) == sizeof (unsigned short)) | |
254 | id = u.us; | |
255 | else if (sizeof (p) == sizeof (unsigned int)) | |
256 | id = u.ui; | |
257 | else if (sizeof (p) == sizeof (unsigned long)) | |
258 | id = u.ul; | |
259 | else | |
260 | id = u.um; | |
261 | ||
d823b11b | 262 | scm_puts ("#<thread ", port); |
23d72566 | 263 | scm_uintprint (id, 10, port); |
1b92fb6b | 264 | scm_puts (" (", port); |
0345e278 | 265 | scm_uintprint ((scm_t_bits)t, 16, port); |
1b92fb6b | 266 | scm_puts (")>", port); |
d823b11b MV |
267 | return 1; |
268 | } | |
269 | ||
706846f6 | 270 | \f |
9de87eea | 271 | /*** Blocking on queues. */ |
f7eca35d | 272 | |
9de87eea MV |
273 | /* See also scm_i_queue_async_cell for how such a block is |
274 | interrputed. | |
275 | */ | |
d823b11b | 276 | |
9de87eea MV |
277 | /* Put the current thread on QUEUE and go to sleep, waiting for it to |
278 | be woken up by a call to 'unblock_from_queue', or to be | |
279 | interrupted. Upon return of this function, the current thread is | |
280 | no longer on QUEUE, even when the sleep has been interrupted. | |
281 | ||
d2a51087 | 282 | The caller of block_self must hold MUTEX. It will be atomically |
9de87eea MV |
283 | unlocked while sleeping, just as with scm_i_pthread_cond_wait. |
284 | ||
285 | SLEEP_OBJECT is an arbitrary SCM value that is kept alive as long | |
286 | as MUTEX is needed. | |
287 | ||
288 | When WAITTIME is not NULL, the sleep will be aborted at that time. | |
289 | ||
290 | The return value of block_self is an errno value. It will be zero | |
291 | when the sleep has been successfully completed by a call to | |
292 | unblock_from_queue, EINTR when it has been interrupted by the | |
293 | delivery of a system async, and ETIMEDOUT when the timeout has | |
294 | expired. | |
295 | ||
296 | The system asyncs themselves are not executed by block_self. | |
297 | */ | |
298 | static int | |
299 | block_self (SCM queue, SCM sleep_object, scm_i_pthread_mutex_t *mutex, | |
300 | const scm_t_timespec *waittime) | |
76da80e7 | 301 | { |
9de87eea MV |
302 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
303 | SCM q_handle; | |
304 | int err; | |
305 | ||
306 | if (scm_i_setup_sleep (t, sleep_object, mutex, -1)) | |
307 | err = EINTR; | |
308 | else | |
309 | { | |
310 | t->block_asyncs++; | |
311 | q_handle = enqueue (queue, t->handle); | |
312 | if (waittime == NULL) | |
313 | err = scm_i_scm_pthread_cond_wait (&t->sleep_cond, mutex); | |
314 | else | |
315 | err = scm_i_scm_pthread_cond_timedwait (&t->sleep_cond, mutex, waittime); | |
316 | ||
317 | /* When we are still on QUEUE, we have been interrupted. We | |
318 | report this only when no other error (such as a timeout) has | |
319 | happened above. | |
320 | */ | |
321 | if (remqueue (queue, q_handle) && err == 0) | |
322 | err = EINTR; | |
323 | t->block_asyncs--; | |
324 | scm_i_reset_sleep (t); | |
325 | } | |
326 | ||
327 | return err; | |
76da80e7 | 328 | } |
9de87eea | 329 | |
d2a51087 NJ |
330 | /* Wake up the first thread on QUEUE, if any. The awoken thread is |
331 | returned, or #f if the queue was empty. | |
9de87eea MV |
332 | */ |
333 | static SCM | |
334 | unblock_from_queue (SCM queue) | |
335 | { | |
336 | SCM thread = dequeue (queue); | |
337 | if (scm_is_true (thread)) | |
338 | scm_i_pthread_cond_signal (&SCM_I_THREAD_DATA(thread)->sleep_cond); | |
339 | return thread; | |
340 | } | |
341 | ||
45f15cac | 342 | \f |
9de87eea MV |
343 | /* Getting into and out of guile mode. |
344 | */ | |
345 | ||
705edb95 LC |
346 | #ifdef SCM_HAVE_THREAD_STORAGE_CLASS |
347 | ||
348 | /* When thread-local storage (TLS) is available, a pointer to the | |
349 | current-thread object is kept in TLS. Note that storing the thread-object | |
350 | itself in TLS (rather than a pointer to some malloc'd memory) is not | |
351 | possible since thread objects may live longer than the actual thread they | |
352 | represent. */ | |
353 | SCM_THREAD_LOCAL scm_i_thread *scm_i_current_thread = NULL; | |
354 | ||
355 | # define SET_CURRENT_THREAD(_t) scm_i_current_thread = (_t) | |
356 | ||
357 | #else /* !SCM_HAVE_THREAD_STORAGE_CLASS */ | |
358 | ||
359 | /* Key used to retrieve the current thread with `pthread_getspecific ()'. */ | |
9de87eea MV |
360 | scm_i_pthread_key_t scm_i_thread_key; |
361 | ||
705edb95 LC |
362 | # define SET_CURRENT_THREAD(_t) \ |
363 | scm_i_pthread_setspecific (scm_i_thread_key, (_t)) | |
364 | ||
365 | #endif /* !SCM_HAVE_THREAD_STORAGE_CLASS */ | |
366 | ||
d823b11b | 367 | |
9de87eea MV |
368 | static scm_i_pthread_mutex_t thread_admin_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
369 | static scm_i_thread *all_threads = NULL; | |
370 | static int thread_count; | |
371 | ||
372 | static SCM scm_i_default_dynamic_state; | |
373 | ||
374 | /* Perform first stage of thread initialisation, in non-guile mode. | |
d823b11b | 375 | */ |
9de87eea MV |
376 | static void |
377 | guilify_self_1 (SCM_STACKITEM *base) | |
d823b11b | 378 | { |
c812243b | 379 | scm_i_thread *t = scm_gc_malloc (sizeof (scm_i_thread), "thread"); |
9de87eea MV |
380 | |
381 | t->pthread = scm_i_pthread_self (); | |
382 | t->handle = SCM_BOOL_F; | |
383 | t->result = SCM_BOOL_F; | |
2e77f720 | 384 | t->cleanup_handler = SCM_BOOL_F; |
6180e336 | 385 | t->mutexes = SCM_EOL; |
d2a51087 | 386 | t->held_mutex = NULL; |
9de87eea MV |
387 | t->join_queue = SCM_EOL; |
388 | t->dynamic_state = SCM_BOOL_F; | |
389 | t->dynwinds = SCM_EOL; | |
390 | t->active_asyncs = SCM_EOL; | |
9de87eea MV |
391 | t->block_asyncs = 1; |
392 | t->pending_asyncs = 1; | |
87f30eda | 393 | t->critical_section_level = 0; |
9de87eea | 394 | t->base = base; |
346e4402 NJ |
395 | #ifdef __ia64__ |
396 | /* Calculate and store off the base of this thread's register | |
397 | backing store (RBS). Unfortunately our implementation(s) of | |
398 | scm_ia64_register_backing_store_base are only reliable for the | |
399 | main thread. For other threads, therefore, find out the current | |
400 | top of the RBS, and use that as a maximum. */ | |
401 | t->register_backing_store_base = scm_ia64_register_backing_store_base (); | |
402 | { | |
403 | ucontext_t ctx; | |
404 | void *bsp; | |
405 | getcontext (&ctx); | |
406 | bsp = scm_ia64_ar_bsp (&ctx); | |
407 | if (t->register_backing_store_base > bsp) | |
408 | t->register_backing_store_base = bsp; | |
409 | } | |
410 | #endif | |
0c97d7dd | 411 | t->continuation_root = SCM_EOL; |
9de87eea MV |
412 | t->continuation_base = base; |
413 | scm_i_pthread_cond_init (&t->sleep_cond, NULL); | |
414 | t->sleep_mutex = NULL; | |
415 | t->sleep_object = SCM_BOOL_F; | |
416 | t->sleep_fd = -1; | |
634aa8de LC |
417 | |
418 | if (pipe (t->sleep_pipe) != 0) | |
419 | /* FIXME: Error conditions during the initialization phase are handled | |
420 | gracelessly since public functions such as `scm_init_guile ()' | |
421 | currently have type `void'. */ | |
422 | abort (); | |
423 | ||
86a597f8 | 424 | scm_i_pthread_mutex_init (&t->admin_mutex, NULL); |
378f2625 LC |
425 | t->current_mark_stack_ptr = NULL; |
426 | t->current_mark_stack_limit = NULL; | |
2e77f720 | 427 | t->canceled = 0; |
9de87eea | 428 | t->exited = 0; |
72e6b608 | 429 | t->guile_mode = 0; |
9de87eea | 430 | |
705edb95 | 431 | SET_CURRENT_THREAD (t); |
9de87eea | 432 | |
9de87eea MV |
433 | scm_i_pthread_mutex_lock (&thread_admin_mutex); |
434 | t->next_thread = all_threads; | |
435 | all_threads = t; | |
436 | thread_count++; | |
437 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
d823b11b MV |
438 | } |
439 | ||
9de87eea | 440 | /* Perform second stage of thread initialisation, in guile mode. |
d823b11b | 441 | */ |
9de87eea MV |
442 | static void |
443 | guilify_self_2 (SCM parent) | |
d823b11b | 444 | { |
9de87eea MV |
445 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
446 | ||
72e6b608 LC |
447 | t->guile_mode = 1; |
448 | ||
9de87eea | 449 | SCM_NEWSMOB (t->handle, scm_tc16_thread, t); |
c812243b | 450 | |
9de87eea MV |
451 | t->continuation_root = scm_cons (t->handle, SCM_EOL); |
452 | t->continuation_base = t->base; | |
2bbe1533 | 453 | t->vm = SCM_BOOL_F; |
9de87eea MV |
454 | |
455 | if (scm_is_true (parent)) | |
456 | t->dynamic_state = scm_make_dynamic_state (parent); | |
457 | else | |
458 | t->dynamic_state = scm_i_make_initial_dynamic_state (); | |
459 | ||
460 | t->join_queue = make_queue (); | |
461 | t->block_asyncs = 0; | |
d823b11b MV |
462 | } |
463 | ||
6180e336 NJ |
464 | \f |
465 | /*** Fat mutexes */ | |
466 | ||
467 | /* We implement our own mutex type since we want them to be 'fair', we | |
468 | want to do fancy things while waiting for them (like running | |
469 | asyncs) and we might want to add things that are nice for | |
470 | debugging. | |
471 | */ | |
472 | ||
473 | typedef struct { | |
474 | scm_i_pthread_mutex_t lock; | |
475 | SCM owner; | |
adc085f1 | 476 | int level; /* how much the owner owns us. <= 1 for non-recursive mutexes */ |
6180e336 | 477 | |
adc085f1 | 478 | int recursive; /* allow recursive locking? */ |
6180e336 NJ |
479 | int unchecked_unlock; /* is it an error to unlock an unlocked mutex? */ |
480 | int allow_external_unlock; /* is it an error to unlock a mutex that is not | |
481 | owned by the current thread? */ | |
482 | ||
483 | SCM waiting; /* the threads waiting for this mutex. */ | |
484 | } fat_mutex; | |
485 | ||
486 | #define SCM_MUTEXP(x) SCM_SMOB_PREDICATE (scm_tc16_mutex, x) | |
487 | #define SCM_MUTEX_DATA(x) ((fat_mutex *) SCM_SMOB_DATA (x)) | |
488 | ||
9de87eea | 489 | /* Perform thread tear-down, in guile mode. |
d823b11b | 490 | */ |
9de87eea MV |
491 | static void * |
492 | do_thread_exit (void *v) | |
493 | { | |
2e77f720 LC |
494 | scm_i_thread *t = (scm_i_thread *) v; |
495 | ||
496 | if (!scm_is_false (t->cleanup_handler)) | |
497 | { | |
498 | SCM ptr = t->cleanup_handler; | |
499 | ||
500 | t->cleanup_handler = SCM_BOOL_F; | |
501 | t->result = scm_internal_catch (SCM_BOOL_T, | |
502 | (scm_t_catch_body) scm_call_0, ptr, | |
503 | scm_handle_by_message_noexit, NULL); | |
504 | } | |
9de87eea | 505 | |
86a597f8 | 506 | scm_i_scm_pthread_mutex_lock (&t->admin_mutex); |
9de87eea MV |
507 | |
508 | t->exited = 1; | |
0c97d7dd MV |
509 | close (t->sleep_pipe[0]); |
510 | close (t->sleep_pipe[1]); | |
9de87eea MV |
511 | while (scm_is_true (unblock_from_queue (t->join_queue))) |
512 | ; | |
9de87eea | 513 | |
74926120 | 514 | while (!scm_is_null (t->mutexes)) |
6180e336 | 515 | { |
a0faf7dd | 516 | SCM mutex = SCM_WEAK_PAIR_CAR (t->mutexes); |
74926120 | 517 | |
a0faf7dd LC |
518 | if (!SCM_UNBNDP (mutex)) |
519 | { | |
520 | fat_mutex *m = SCM_MUTEX_DATA (mutex); | |
521 | ||
522 | scm_i_pthread_mutex_lock (&m->lock); | |
f57fdf07 LC |
523 | |
524 | /* Since MUTEX is in `t->mutexes', T must be its owner. */ | |
525 | assert (scm_is_eq (m->owner, t->handle)); | |
526 | ||
a0faf7dd | 527 | unblock_from_queue (m->waiting); |
f57fdf07 | 528 | |
a0faf7dd LC |
529 | scm_i_pthread_mutex_unlock (&m->lock); |
530 | } | |
6180e336 | 531 | |
a0faf7dd | 532 | t->mutexes = SCM_WEAK_PAIR_CDR (t->mutexes); |
6180e336 NJ |
533 | } |
534 | ||
86a597f8 | 535 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
2e77f720 | 536 | |
9de87eea MV |
537 | return NULL; |
538 | } | |
539 | ||
d823b11b | 540 | static void |
9de87eea | 541 | on_thread_exit (void *v) |
d823b11b | 542 | { |
29776e85 | 543 | /* This handler is executed in non-guile mode. */ |
2e77f720 | 544 | scm_i_thread *t = (scm_i_thread *) v, **tp; |
0c97d7dd | 545 | |
d2a51087 NJ |
546 | /* If this thread was cancelled while doing a cond wait, it will |
547 | still have a mutex locked, so we unlock it here. */ | |
548 | if (t->held_mutex) | |
549 | { | |
550 | scm_i_pthread_mutex_unlock (t->held_mutex); | |
551 | t->held_mutex = NULL; | |
552 | } | |
553 | ||
705edb95 | 554 | SET_CURRENT_THREAD (v); |
0c97d7dd | 555 | |
2e77f720 LC |
556 | /* Ensure the signal handling thread has been launched, because we might be |
557 | shutting it down. */ | |
558 | scm_i_ensure_signal_delivery_thread (); | |
559 | ||
0c97d7dd | 560 | /* Unblocking the joining threads needs to happen in guile mode |
29776e85 | 561 | since the queue is a SCM data structure. */ |
35747a3e | 562 | |
47b6e9bd LC |
563 | /* Note: Since `do_thread_exit ()' uses allocates memory via `libgc', we |
564 | assume the GC is usable at this point, and notably that thread-local | |
565 | storage (TLS) hasn't been deallocated yet. */ | |
566 | do_thread_exit (v); | |
0c97d7dd MV |
567 | |
568 | /* Removing ourself from the list of all threads needs to happen in | |
569 | non-guile mode since all SCM values on our stack become | |
29776e85 | 570 | unprotected once we are no longer in the list. */ |
0c97d7dd MV |
571 | scm_i_pthread_mutex_lock (&thread_admin_mutex); |
572 | for (tp = &all_threads; *tp; tp = &(*tp)->next_thread) | |
573 | if (*tp == t) | |
574 | { | |
575 | *tp = t->next_thread; | |
c058db8a LC |
576 | |
577 | /* GC-robust */ | |
578 | t->next_thread = NULL; | |
579 | ||
0c97d7dd MV |
580 | break; |
581 | } | |
582 | thread_count--; | |
2e77f720 LC |
583 | |
584 | /* If there's only one other thread, it could be the signal delivery | |
585 | thread, so we need to notify it to shut down by closing its read pipe. | |
586 | If it's not the signal delivery thread, then closing the read pipe isn't | |
587 | going to hurt. */ | |
588 | if (thread_count <= 1) | |
589 | scm_i_close_signal_pipe (); | |
590 | ||
0c97d7dd MV |
591 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); |
592 | ||
705edb95 | 593 | SET_CURRENT_THREAD (NULL); |
d823b11b MV |
594 | } |
595 | ||
705edb95 LC |
596 | #ifndef SCM_HAVE_THREAD_STORAGE_CLASS |
597 | ||
9de87eea | 598 | static scm_i_pthread_once_t init_thread_key_once = SCM_I_PTHREAD_ONCE_INIT; |
d823b11b | 599 | |
9de87eea MV |
600 | static void |
601 | init_thread_key (void) | |
602 | { | |
47b6e9bd | 603 | scm_i_pthread_key_create (&scm_i_thread_key, NULL); |
9de87eea | 604 | } |
d823b11b | 605 | |
705edb95 LC |
606 | #endif |
607 | ||
cde24ce1 AW |
608 | /* Perform any initializations necessary to make the current thread |
609 | known to Guile (via SCM_I_CURRENT_THREAD), initializing Guile itself, | |
610 | if necessary. | |
a54a94b3 | 611 | |
9de87eea MV |
612 | BASE is the stack base to use with GC. |
613 | ||
614 | PARENT is the dynamic state to use as the parent, ot SCM_BOOL_F in | |
615 | which case the default dynamic state is used. | |
616 | ||
cde24ce1 | 617 | Returns zero when the thread was known to guile already; otherwise |
9de87eea | 618 | return 1. |
cde24ce1 AW |
619 | |
620 | Note that it could be the case that the thread was known | |
621 | to Guile, but not in guile mode (because we are within a | |
622 | scm_without_guile call). Check SCM_I_CURRENT_THREAD->guile_mode to | |
623 | be sure. New threads are put into guile mode implicitly. */ | |
9de87eea MV |
624 | |
625 | static int | |
626 | scm_i_init_thread_for_guile (SCM_STACKITEM *base, SCM parent) | |
d823b11b | 627 | { |
705edb95 | 628 | #ifndef SCM_HAVE_THREAD_STORAGE_CLASS |
9de87eea | 629 | scm_i_pthread_once (&init_thread_key_once, init_thread_key); |
705edb95 | 630 | #endif |
9de87eea | 631 | |
cde24ce1 AW |
632 | if (SCM_I_CURRENT_THREAD) |
633 | { | |
634 | /* Thread is already known to Guile. | |
635 | */ | |
636 | return 0; | |
637 | } | |
638 | else | |
9de87eea MV |
639 | { |
640 | /* This thread has not been guilified yet. | |
641 | */ | |
642 | ||
643 | scm_i_pthread_mutex_lock (&scm_i_init_mutex); | |
644 | if (scm_initialized_p == 0) | |
645 | { | |
646 | /* First thread ever to enter Guile. Run the full | |
647 | initialization. | |
648 | */ | |
649 | scm_i_init_guile (base); | |
650 | scm_i_pthread_mutex_unlock (&scm_i_init_mutex); | |
651 | } | |
652 | else | |
653 | { | |
654 | /* Guile is already initialized, but this thread enters it for | |
655 | the first time. Only initialize this thread. | |
656 | */ | |
657 | scm_i_pthread_mutex_unlock (&scm_i_init_mutex); | |
658 | guilify_self_1 (base); | |
659 | guilify_self_2 (parent); | |
660 | } | |
661 | return 1; | |
662 | } | |
d823b11b MV |
663 | } |
664 | ||
9de87eea | 665 | #if SCM_USE_PTHREAD_THREADS |
9de87eea | 666 | |
534bbcc1 | 667 | #if defined HAVE_PTHREAD_ATTR_GETSTACK && defined HAVE_PTHREAD_GETATTR_NP |
23d72566 KR |
668 | /* This method for GNU/Linux and perhaps some other systems. |
669 | It's not for MacOS X or Solaris 10, since pthread_getattr_np is not | |
670 | available on them. */ | |
9de87eea MV |
671 | #define HAVE_GET_THREAD_STACK_BASE |
672 | ||
673 | static SCM_STACKITEM * | |
674 | get_thread_stack_base () | |
d823b11b | 675 | { |
9de87eea MV |
676 | pthread_attr_t attr; |
677 | void *start, *end; | |
678 | size_t size; | |
679 | ||
9de87eea MV |
680 | pthread_getattr_np (pthread_self (), &attr); |
681 | pthread_attr_getstack (&attr, &start, &size); | |
682 | end = (char *)start + size; | |
683 | ||
2b829bbb KR |
684 | /* XXX - pthread_getattr_np from LinuxThreads does not seem to work |
685 | for the main thread, but we can use scm_get_stack_base in that | |
686 | case. | |
687 | */ | |
688 | ||
689 | #ifndef PTHREAD_ATTR_GETSTACK_WORKS | |
9de87eea | 690 | if ((void *)&attr < start || (void *)&attr >= end) |
071e0d93 | 691 | return (SCM_STACKITEM *) GC_stackbottom; |
9de87eea | 692 | else |
2b829bbb | 693 | #endif |
9de87eea MV |
694 | { |
695 | #if SCM_STACK_GROWS_UP | |
696 | return start; | |
697 | #else | |
698 | return end; | |
699 | #endif | |
700 | } | |
a54a94b3 MV |
701 | } |
702 | ||
56a3dcd4 | 703 | #elif defined HAVE_PTHREAD_GET_STACKADDR_NP |
23d72566 KR |
704 | /* This method for MacOS X. |
705 | It'd be nice if there was some documentation on pthread_get_stackaddr_np, | |
706 | but as of 2006 there's nothing obvious at apple.com. */ | |
707 | #define HAVE_GET_THREAD_STACK_BASE | |
708 | static SCM_STACKITEM * | |
709 | get_thread_stack_base () | |
710 | { | |
711 | return pthread_get_stackaddr_np (pthread_self ()); | |
712 | } | |
713 | ||
714 | #elif defined (__MINGW32__) | |
715 | /* This method for mingw. In mingw the basic scm_get_stack_base can be used | |
716 | in any thread. We don't like hard-coding the name of a system, but there | |
717 | doesn't seem to be a cleaner way of knowing scm_get_stack_base can | |
718 | work. */ | |
719 | #define HAVE_GET_THREAD_STACK_BASE | |
720 | static SCM_STACKITEM * | |
721 | get_thread_stack_base () | |
722 | { | |
071e0d93 | 723 | return (SCM_STACKITEM *) GC_stackbottom; |
23d72566 KR |
724 | } |
725 | ||
726 | #endif /* pthread methods of get_thread_stack_base */ | |
9de87eea MV |
727 | |
728 | #else /* !SCM_USE_PTHREAD_THREADS */ | |
729 | ||
730 | #define HAVE_GET_THREAD_STACK_BASE | |
731 | ||
732 | static SCM_STACKITEM * | |
733 | get_thread_stack_base () | |
a54a94b3 | 734 | { |
071e0d93 | 735 | return (SCM_STACKITEM *) GC_stackbottom; |
d823b11b MV |
736 | } |
737 | ||
9de87eea | 738 | #endif /* !SCM_USE_PTHREAD_THREADS */ |
9de87eea MV |
739 | |
740 | #ifdef HAVE_GET_THREAD_STACK_BASE | |
741 | ||
742 | void | |
743 | scm_init_guile () | |
d823b11b | 744 | { |
9de87eea MV |
745 | scm_i_init_thread_for_guile (get_thread_stack_base (), |
746 | scm_i_default_dynamic_state); | |
d823b11b MV |
747 | } |
748 | ||
9de87eea MV |
749 | #endif |
750 | ||
751 | void * | |
752 | scm_with_guile (void *(*func)(void *), void *data) | |
753 | { | |
754 | return scm_i_with_guile_and_parent (func, data, | |
755 | scm_i_default_dynamic_state); | |
756 | } | |
757 | ||
70eca635 | 758 | SCM_UNUSED static void |
2e77f720 LC |
759 | scm_leave_guile_cleanup (void *x) |
760 | { | |
47b6e9bd | 761 | on_thread_exit (SCM_I_CURRENT_THREAD); |
2e77f720 LC |
762 | } |
763 | ||
cde24ce1 AW |
764 | struct with_guile_trampoline_args |
765 | { | |
766 | GC_fn_type func; | |
767 | void *data; | |
768 | }; | |
769 | ||
770 | static void * | |
771 | with_guile_trampoline (void *data) | |
772 | { | |
773 | struct with_guile_trampoline_args *args = data; | |
774 | ||
775 | return scm_c_with_continuation_barrier (args->func, args->data); | |
776 | } | |
777 | ||
9de87eea | 778 | void * |
2e77f720 | 779 | scm_i_with_guile_and_parent (void *(*func)(void *), void *data, SCM parent) |
9de87eea MV |
780 | { |
781 | void *res; | |
cde24ce1 AW |
782 | int new_thread; |
783 | scm_i_thread *t; | |
9de87eea | 784 | SCM_STACKITEM base_item; |
2e77f720 | 785 | |
cde24ce1 AW |
786 | new_thread = scm_i_init_thread_for_guile (&base_item, parent); |
787 | t = SCM_I_CURRENT_THREAD; | |
788 | if (new_thread) | |
2e77f720 | 789 | { |
cde24ce1 AW |
790 | /* We are in Guile mode. */ |
791 | assert (t->guile_mode); | |
792 | ||
2e77f720 LC |
793 | scm_i_pthread_cleanup_push (scm_leave_guile_cleanup, NULL); |
794 | res = scm_c_with_continuation_barrier (func, data); | |
795 | scm_i_pthread_cleanup_pop (0); | |
cde24ce1 AW |
796 | |
797 | /* Leave Guile mode. */ | |
798 | t->guile_mode = 0; | |
799 | } | |
800 | else if (t->guile_mode) | |
801 | { | |
802 | /* Already in Guile mode. */ | |
803 | res = scm_c_with_continuation_barrier (func, data); | |
2e77f720 | 804 | } |
74926120 | 805 | else |
cde24ce1 AW |
806 | { |
807 | struct with_guile_trampoline_args args; | |
808 | args.func = func; | |
809 | args.data = data; | |
72e6b608 | 810 | |
cde24ce1 AW |
811 | /* We are not in Guile mode, either because we are not within a |
812 | scm_with_guile, or because we are within a scm_without_guile. | |
72e6b608 | 813 | |
cde24ce1 AW |
814 | This call to scm_with_guile() could happen from anywhere on the |
815 | stack, and in particular lower on the stack than when it was | |
816 | when this thread was first guilified. Thus, `base' must be | |
817 | updated. */ | |
818 | #if SCM_STACK_GROWS_UP | |
819 | if (SCM_STACK_PTR (&base_item) < t->base) | |
820 | t->base = SCM_STACK_PTR (&base_item); | |
821 | #else | |
822 | if (SCM_STACK_PTR (&base_item) > t->base) | |
823 | t->base = SCM_STACK_PTR (&base_item); | |
824 | #endif | |
72e6b608 | 825 | |
cde24ce1 AW |
826 | t->guile_mode = 1; |
827 | res = with_gc_active (with_guile_trampoline, &args); | |
828 | t->guile_mode = 0; | |
829 | } | |
830 | return res; | |
72e6b608 | 831 | } |
3d1af79f | 832 | |
9de87eea MV |
833 | void * |
834 | scm_without_guile (void *(*func)(void *), void *data) | |
d823b11b | 835 | { |
72e6b608 | 836 | void *result; |
cde24ce1 | 837 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
72e6b608 | 838 | |
cde24ce1 | 839 | if (t->guile_mode) |
72e6b608 | 840 | { |
cde24ce1 AW |
841 | SCM_I_CURRENT_THREAD->guile_mode = 0; |
842 | result = with_gc_inactive (func, data); | |
843 | SCM_I_CURRENT_THREAD->guile_mode = 1; | |
72e6b608 LC |
844 | } |
845 | else | |
cde24ce1 | 846 | /* Otherwise we're not in guile mode, so nothing to do. */ |
72e6b608 LC |
847 | result = func (data); |
848 | ||
849 | return result; | |
9de87eea MV |
850 | } |
851 | ||
72e6b608 | 852 | \f |
9de87eea MV |
853 | /*** Thread creation */ |
854 | ||
855 | typedef struct { | |
856 | SCM parent; | |
857 | SCM thunk; | |
858 | SCM handler; | |
76da80e7 | 859 | SCM thread; |
9de87eea MV |
860 | scm_i_pthread_mutex_t mutex; |
861 | scm_i_pthread_cond_t cond; | |
862 | } launch_data; | |
d823b11b | 863 | |
9de87eea MV |
864 | static void * |
865 | really_launch (void *d) | |
866 | { | |
867 | launch_data *data = (launch_data *)d; | |
868 | SCM thunk = data->thunk, handler = data->handler; | |
869 | scm_i_thread *t; | |
d823b11b | 870 | |
9de87eea | 871 | t = SCM_I_CURRENT_THREAD; |
a54a94b3 | 872 | |
9de87eea MV |
873 | scm_i_scm_pthread_mutex_lock (&data->mutex); |
874 | data->thread = scm_current_thread (); | |
875 | scm_i_pthread_cond_signal (&data->cond); | |
876 | scm_i_pthread_mutex_unlock (&data->mutex); | |
877 | ||
878 | if (SCM_UNBNDP (handler)) | |
879 | t->result = scm_call_0 (thunk); | |
880 | else | |
881 | t->result = scm_catch (SCM_BOOL_T, thunk, handler); | |
882 | ||
47b6e9bd LC |
883 | /* Trigger a call to `on_thread_exit ()'. */ |
884 | pthread_exit (NULL); | |
885 | ||
9de87eea | 886 | return 0; |
d823b11b MV |
887 | } |
888 | ||
9de87eea MV |
889 | static void * |
890 | launch_thread (void *d) | |
891 | { | |
892 | launch_data *data = (launch_data *)d; | |
893 | scm_i_pthread_detach (scm_i_pthread_self ()); | |
894 | scm_i_with_guile_and_parent (really_launch, d, data->parent); | |
895 | return NULL; | |
896 | } | |
897 | ||
898 | SCM_DEFINE (scm_call_with_new_thread, "call-with-new-thread", 1, 1, 0, | |
d823b11b | 899 | (SCM thunk, SCM handler), |
9de87eea MV |
900 | "Call @code{thunk} in a new thread and with a new dynamic state,\n" |
901 | "returning a new thread object representing the thread. The procedure\n" | |
902 | "@var{thunk} is called via @code{with-continuation-barrier}.\n" | |
903 | "\n" | |
904 | "When @var{handler} is specified, then @var{thunk} is called from\n" | |
905 | "within a @code{catch} with tag @code{#t} that has @var{handler} as its\n" | |
906 | "handler. This catch is established inside the continuation barrier.\n" | |
907 | "\n" | |
908 | "Once @var{thunk} or @var{handler} returns, the return value is made\n" | |
909 | "the @emph{exit value} of the thread and the thread is terminated.") | |
d823b11b MV |
910 | #define FUNC_NAME s_scm_call_with_new_thread |
911 | { | |
9de87eea MV |
912 | launch_data data; |
913 | scm_i_pthread_t id; | |
914 | int err; | |
d823b11b | 915 | |
9de87eea MV |
916 | SCM_ASSERT (scm_is_true (scm_thunk_p (thunk)), thunk, SCM_ARG1, FUNC_NAME); |
917 | SCM_ASSERT (SCM_UNBNDP (handler) || scm_is_true (scm_procedure_p (handler)), | |
918 | handler, SCM_ARG2, FUNC_NAME); | |
919 | ||
920 | data.parent = scm_current_dynamic_state (); | |
921 | data.thunk = thunk; | |
922 | data.handler = handler; | |
923 | data.thread = SCM_BOOL_F; | |
924 | scm_i_pthread_mutex_init (&data.mutex, NULL); | |
925 | scm_i_pthread_cond_init (&data.cond, NULL); | |
926 | ||
927 | scm_i_scm_pthread_mutex_lock (&data.mutex); | |
928 | err = scm_i_pthread_create (&id, NULL, launch_thread, &data); | |
929 | if (err) | |
930 | { | |
931 | scm_i_pthread_mutex_unlock (&data.mutex); | |
932 | errno = err; | |
933 | scm_syserror (NULL); | |
934 | } | |
935 | scm_i_scm_pthread_cond_wait (&data.cond, &data.mutex); | |
936 | scm_i_pthread_mutex_unlock (&data.mutex); | |
74926120 | 937 | |
9de87eea | 938 | return data.thread; |
d823b11b MV |
939 | } |
940 | #undef FUNC_NAME | |
941 | ||
9de87eea MV |
942 | typedef struct { |
943 | SCM parent; | |
944 | scm_t_catch_body body; | |
945 | void *body_data; | |
946 | scm_t_catch_handler handler; | |
947 | void *handler_data; | |
948 | SCM thread; | |
949 | scm_i_pthread_mutex_t mutex; | |
950 | scm_i_pthread_cond_t cond; | |
951 | } spawn_data; | |
952 | ||
953 | static void * | |
954 | really_spawn (void *d) | |
955 | { | |
956 | spawn_data *data = (spawn_data *)d; | |
957 | scm_t_catch_body body = data->body; | |
958 | void *body_data = data->body_data; | |
959 | scm_t_catch_handler handler = data->handler; | |
960 | void *handler_data = data->handler_data; | |
961 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
962 | ||
963 | scm_i_scm_pthread_mutex_lock (&data->mutex); | |
964 | data->thread = scm_current_thread (); | |
965 | scm_i_pthread_cond_signal (&data->cond); | |
966 | scm_i_pthread_mutex_unlock (&data->mutex); | |
967 | ||
968 | if (handler == NULL) | |
969 | t->result = body (body_data); | |
970 | else | |
971 | t->result = scm_internal_catch (SCM_BOOL_T, | |
972 | body, body_data, | |
973 | handler, handler_data); | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | static void * | |
979 | spawn_thread (void *d) | |
980 | { | |
981 | spawn_data *data = (spawn_data *)d; | |
982 | scm_i_pthread_detach (scm_i_pthread_self ()); | |
983 | scm_i_with_guile_and_parent (really_spawn, d, data->parent); | |
984 | return NULL; | |
985 | } | |
986 | ||
987 | SCM | |
988 | scm_spawn_thread (scm_t_catch_body body, void *body_data, | |
989 | scm_t_catch_handler handler, void *handler_data) | |
990 | { | |
991 | spawn_data data; | |
992 | scm_i_pthread_t id; | |
993 | int err; | |
994 | ||
995 | data.parent = scm_current_dynamic_state (); | |
996 | data.body = body; | |
997 | data.body_data = body_data; | |
998 | data.handler = handler; | |
999 | data.handler_data = handler_data; | |
1000 | data.thread = SCM_BOOL_F; | |
1001 | scm_i_pthread_mutex_init (&data.mutex, NULL); | |
1002 | scm_i_pthread_cond_init (&data.cond, NULL); | |
1003 | ||
1004 | scm_i_scm_pthread_mutex_lock (&data.mutex); | |
1005 | err = scm_i_pthread_create (&id, NULL, spawn_thread, &data); | |
1006 | if (err) | |
1007 | { | |
1008 | scm_i_pthread_mutex_unlock (&data.mutex); | |
1009 | errno = err; | |
1010 | scm_syserror (NULL); | |
1011 | } | |
1012 | scm_i_scm_pthread_cond_wait (&data.cond, &data.mutex); | |
1013 | scm_i_pthread_mutex_unlock (&data.mutex); | |
74926120 | 1014 | |
9de87eea MV |
1015 | return data.thread; |
1016 | } | |
1017 | ||
29717c89 MD |
1018 | SCM_DEFINE (scm_yield, "yield", 0, 0, 0, |
1019 | (), | |
1020 | "Move the calling thread to the end of the scheduling queue.") | |
1021 | #define FUNC_NAME s_scm_yield | |
1022 | { | |
9de87eea | 1023 | return scm_from_bool (scm_i_sched_yield ()); |
29717c89 MD |
1024 | } |
1025 | #undef FUNC_NAME | |
1026 | ||
2e77f720 LC |
1027 | SCM_DEFINE (scm_cancel_thread, "cancel-thread", 1, 0, 0, |
1028 | (SCM thread), | |
1029 | "Asynchronously force the target @var{thread} to terminate. @var{thread} " | |
1030 | "cannot be the current thread, and if @var{thread} has already terminated or " | |
1031 | "been signaled to terminate, this function is a no-op.") | |
1032 | #define FUNC_NAME s_scm_cancel_thread | |
1033 | { | |
1034 | scm_i_thread *t = NULL; | |
1035 | ||
1036 | SCM_VALIDATE_THREAD (1, thread); | |
1037 | t = SCM_I_THREAD_DATA (thread); | |
86a597f8 | 1038 | scm_i_scm_pthread_mutex_lock (&t->admin_mutex); |
2e77f720 LC |
1039 | if (!t->canceled) |
1040 | { | |
1041 | t->canceled = 1; | |
86a597f8 | 1042 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
2e77f720 LC |
1043 | scm_i_pthread_cancel (t->pthread); |
1044 | } | |
1045 | else | |
86a597f8 | 1046 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
2e77f720 LC |
1047 | |
1048 | return SCM_UNSPECIFIED; | |
1049 | } | |
1050 | #undef FUNC_NAME | |
1051 | ||
1052 | SCM_DEFINE (scm_set_thread_cleanup_x, "set-thread-cleanup!", 2, 0, 0, | |
1053 | (SCM thread, SCM proc), | |
1054 | "Set the thunk @var{proc} as the cleanup handler for the thread @var{thread}. " | |
1055 | "This handler will be called when the thread exits.") | |
1056 | #define FUNC_NAME s_scm_set_thread_cleanup_x | |
1057 | { | |
1058 | scm_i_thread *t; | |
1059 | ||
1060 | SCM_VALIDATE_THREAD (1, thread); | |
1061 | if (!scm_is_false (proc)) | |
1062 | SCM_VALIDATE_THUNK (2, proc); | |
1063 | ||
2e77f720 | 1064 | t = SCM_I_THREAD_DATA (thread); |
86a597f8 NJ |
1065 | scm_i_pthread_mutex_lock (&t->admin_mutex); |
1066 | ||
2e77f720 LC |
1067 | if (!(t->exited || t->canceled)) |
1068 | t->cleanup_handler = proc; | |
1069 | ||
86a597f8 | 1070 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
2e77f720 LC |
1071 | |
1072 | return SCM_UNSPECIFIED; | |
1073 | } | |
1074 | #undef FUNC_NAME | |
1075 | ||
1076 | SCM_DEFINE (scm_thread_cleanup, "thread-cleanup", 1, 0, 0, | |
1077 | (SCM thread), | |
1078 | "Return the cleanup handler installed for the thread @var{thread}.") | |
1079 | #define FUNC_NAME s_scm_thread_cleanup | |
1080 | { | |
1081 | scm_i_thread *t; | |
1082 | SCM ret; | |
1083 | ||
1084 | SCM_VALIDATE_THREAD (1, thread); | |
1085 | ||
2e77f720 | 1086 | t = SCM_I_THREAD_DATA (thread); |
86a597f8 | 1087 | scm_i_pthread_mutex_lock (&t->admin_mutex); |
2e77f720 | 1088 | ret = (t->exited || t->canceled) ? SCM_BOOL_F : t->cleanup_handler; |
86a597f8 | 1089 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
2e77f720 LC |
1090 | |
1091 | return ret; | |
1092 | } | |
1093 | #undef FUNC_NAME | |
1094 | ||
6180e336 NJ |
1095 | SCM scm_join_thread (SCM thread) |
1096 | { | |
1097 | return scm_join_thread_timed (thread, SCM_UNDEFINED, SCM_UNDEFINED); | |
1098 | } | |
1099 | ||
1100 | SCM_DEFINE (scm_join_thread_timed, "join-thread", 1, 2, 0, | |
1101 | (SCM thread, SCM timeout, SCM timeoutval), | |
d823b11b MV |
1102 | "Suspend execution of the calling thread until the target @var{thread} " |
1103 | "terminates, unless the target @var{thread} has already terminated. ") | |
6180e336 | 1104 | #define FUNC_NAME s_scm_join_thread_timed |
5f05c406 | 1105 | { |
9de87eea | 1106 | scm_i_thread *t; |
6180e336 NJ |
1107 | scm_t_timespec ctimeout, *timeout_ptr = NULL; |
1108 | SCM res = SCM_BOOL_F; | |
1109 | ||
1110 | if (! (SCM_UNBNDP (timeoutval))) | |
1111 | res = timeoutval; | |
d823b11b MV |
1112 | |
1113 | SCM_VALIDATE_THREAD (1, thread); | |
9de87eea | 1114 | if (scm_is_eq (scm_current_thread (), thread)) |
2e77f720 | 1115 | SCM_MISC_ERROR ("cannot join the current thread", SCM_EOL); |
d823b11b | 1116 | |
9de87eea | 1117 | t = SCM_I_THREAD_DATA (thread); |
86a597f8 NJ |
1118 | scm_i_scm_pthread_mutex_lock (&t->admin_mutex); |
1119 | ||
6180e336 NJ |
1120 | if (! SCM_UNBNDP (timeout)) |
1121 | { | |
1122 | to_timespec (timeout, &ctimeout); | |
1123 | timeout_ptr = &ctimeout; | |
1124 | } | |
1125 | ||
1126 | if (t->exited) | |
1127 | res = t->result; | |
1128 | else | |
d823b11b | 1129 | { |
9de87eea MV |
1130 | while (1) |
1131 | { | |
74926120 | 1132 | int err = block_self (t->join_queue, thread, &t->admin_mutex, |
6180e336 NJ |
1133 | timeout_ptr); |
1134 | if (err == 0) | |
1135 | { | |
1136 | if (t->exited) | |
1137 | { | |
1138 | res = t->result; | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | else if (err == ETIMEDOUT) | |
9de87eea | 1143 | break; |
6180e336 | 1144 | |
86a597f8 | 1145 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
9de87eea | 1146 | SCM_TICK; |
86a597f8 | 1147 | scm_i_scm_pthread_mutex_lock (&t->admin_mutex); |
21346c4f NJ |
1148 | |
1149 | /* Check for exit again, since we just released and | |
1150 | reacquired the admin mutex, before the next block_self | |
1151 | call (which would block forever if t has already | |
1152 | exited). */ | |
1153 | if (t->exited) | |
1154 | { | |
1155 | res = t->result; | |
1156 | break; | |
1157 | } | |
9de87eea | 1158 | } |
d823b11b | 1159 | } |
9de87eea | 1160 | |
86a597f8 | 1161 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
2e77f720 | 1162 | |
d823b11b | 1163 | return res; |
5f05c406 MV |
1164 | } |
1165 | #undef FUNC_NAME | |
1166 | ||
6180e336 NJ |
1167 | SCM_DEFINE (scm_thread_p, "thread?", 1, 0, 0, |
1168 | (SCM obj), | |
1169 | "Return @code{#t} if @var{obj} is a thread.") | |
1170 | #define FUNC_NAME s_scm_thread_p | |
1171 | { | |
1172 | return SCM_I_IS_THREAD(obj) ? SCM_BOOL_T : SCM_BOOL_F; | |
1173 | } | |
1174 | #undef FUNC_NAME | |
5f05c406 | 1175 | |
4079f87e | 1176 | |
9de87eea MV |
1177 | static size_t |
1178 | fat_mutex_free (SCM mx) | |
76da80e7 | 1179 | { |
9de87eea MV |
1180 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
1181 | scm_i_pthread_mutex_destroy (&m->lock); | |
76da80e7 MV |
1182 | return 0; |
1183 | } | |
1184 | ||
1185 | static int | |
9de87eea | 1186 | fat_mutex_print (SCM mx, SCM port, scm_print_state *pstate SCM_UNUSED) |
76da80e7 | 1187 | { |
9de87eea MV |
1188 | fat_mutex *m = SCM_MUTEX_DATA (mx); |
1189 | scm_puts ("#<mutex ", port); | |
1190 | scm_uintprint ((scm_t_bits)m, 16, port); | |
1191 | scm_puts (">", port); | |
1192 | return 1; | |
76da80e7 MV |
1193 | } |
1194 | ||
76da80e7 | 1195 | static SCM |
6180e336 | 1196 | make_fat_mutex (int recursive, int unchecked_unlock, int external_unlock) |
76da80e7 | 1197 | { |
9de87eea MV |
1198 | fat_mutex *m; |
1199 | SCM mx; | |
1200 | ||
1201 | m = scm_gc_malloc (sizeof (fat_mutex), "mutex"); | |
1202 | scm_i_pthread_mutex_init (&m->lock, NULL); | |
1203 | m->owner = SCM_BOOL_F; | |
adc085f1 | 1204 | m->level = 0; |
6180e336 | 1205 | |
adc085f1 | 1206 | m->recursive = recursive; |
6180e336 NJ |
1207 | m->unchecked_unlock = unchecked_unlock; |
1208 | m->allow_external_unlock = external_unlock; | |
1209 | ||
9de87eea MV |
1210 | m->waiting = SCM_EOL; |
1211 | SCM_NEWSMOB (mx, scm_tc16_mutex, (scm_t_bits) m); | |
1212 | m->waiting = make_queue (); | |
1213 | return mx; | |
76da80e7 MV |
1214 | } |
1215 | ||
6180e336 NJ |
1216 | SCM scm_make_mutex (void) |
1217 | { | |
1218 | return scm_make_mutex_with_flags (SCM_EOL); | |
1219 | } | |
1220 | ||
2a1d0688 NJ |
1221 | SCM_SYMBOL (unchecked_unlock_sym, "unchecked-unlock"); |
1222 | SCM_SYMBOL (allow_external_unlock_sym, "allow-external-unlock"); | |
1223 | SCM_SYMBOL (recursive_sym, "recursive"); | |
6180e336 NJ |
1224 | |
1225 | SCM_DEFINE (scm_make_mutex_with_flags, "make-mutex", 0, 0, 1, | |
1226 | (SCM flags), | |
9de87eea | 1227 | "Create a new mutex. ") |
6180e336 | 1228 | #define FUNC_NAME s_scm_make_mutex_with_flags |
76da80e7 | 1229 | { |
6180e336 NJ |
1230 | int unchecked_unlock = 0, external_unlock = 0, recursive = 0; |
1231 | ||
1232 | SCM ptr = flags; | |
1233 | while (! scm_is_null (ptr)) | |
1234 | { | |
1235 | SCM flag = SCM_CAR (ptr); | |
1236 | if (scm_is_eq (flag, unchecked_unlock_sym)) | |
1237 | unchecked_unlock = 1; | |
1238 | else if (scm_is_eq (flag, allow_external_unlock_sym)) | |
1239 | external_unlock = 1; | |
1240 | else if (scm_is_eq (flag, recursive_sym)) | |
1241 | recursive = 1; | |
74926120 | 1242 | else |
2a1d0688 | 1243 | SCM_MISC_ERROR ("unsupported mutex option: ~a", scm_list_1 (flag)); |
6180e336 NJ |
1244 | ptr = SCM_CDR (ptr); |
1245 | } | |
1246 | return make_fat_mutex (recursive, unchecked_unlock, external_unlock); | |
76da80e7 MV |
1247 | } |
1248 | #undef FUNC_NAME | |
1249 | ||
9de87eea | 1250 | SCM_DEFINE (scm_make_recursive_mutex, "make-recursive-mutex", 0, 0, 0, |
9bc4701c | 1251 | (void), |
9de87eea MV |
1252 | "Create a new recursive mutex. ") |
1253 | #define FUNC_NAME s_scm_make_recursive_mutex | |
9bc4701c | 1254 | { |
6180e336 | 1255 | return make_fat_mutex (1, 0, 0); |
9bc4701c MD |
1256 | } |
1257 | #undef FUNC_NAME | |
1258 | ||
6180e336 NJ |
1259 | SCM_SYMBOL (scm_abandoned_mutex_error_key, "abandoned-mutex-error"); |
1260 | ||
1261 | static SCM | |
adc085f1 | 1262 | fat_mutex_lock (SCM mutex, scm_t_timespec *timeout, SCM owner, int *ret) |
9de87eea MV |
1263 | { |
1264 | fat_mutex *m = SCM_MUTEX_DATA (mutex); | |
6180e336 | 1265 | |
adc085f1 | 1266 | SCM new_owner = SCM_UNBNDP (owner) ? scm_current_thread() : owner; |
6180e336 NJ |
1267 | SCM err = SCM_BOOL_F; |
1268 | ||
1269 | struct timeval current_time; | |
9de87eea MV |
1270 | |
1271 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
adc085f1 JG |
1272 | |
1273 | while (1) | |
9de87eea | 1274 | { |
adc085f1 | 1275 | if (m->level == 0) |
6180e336 | 1276 | { |
adc085f1 | 1277 | m->owner = new_owner; |
6180e336 | 1278 | m->level++; |
74926120 | 1279 | |
adc085f1 | 1280 | if (SCM_I_IS_THREAD (new_owner)) |
6180e336 | 1281 | { |
adc085f1 | 1282 | scm_i_thread *t = SCM_I_THREAD_DATA (new_owner); |
6180e336 | 1283 | scm_i_pthread_mutex_lock (&t->admin_mutex); |
a0faf7dd LC |
1284 | |
1285 | /* Only keep a weak reference to MUTEX so that it's not | |
f57fdf07 LC |
1286 | retained when not referenced elsewhere (bug #27450). |
1287 | The weak pair itself is eventually removed when MUTEX | |
1288 | is unlocked. Note that `t->mutexes' lists mutexes | |
1289 | currently held by T, so it should be small. */ | |
a0faf7dd LC |
1290 | t->mutexes = scm_weak_car_pair (mutex, t->mutexes); |
1291 | ||
6180e336 | 1292 | scm_i_pthread_mutex_unlock (&t->admin_mutex); |
6180e336 | 1293 | } |
adc085f1 JG |
1294 | *ret = 1; |
1295 | break; | |
1296 | } | |
1297 | else if (SCM_I_IS_THREAD (m->owner) && scm_c_thread_exited_p (m->owner)) | |
1298 | { | |
1299 | m->owner = new_owner; | |
1300 | err = scm_cons (scm_abandoned_mutex_error_key, | |
1301 | scm_from_locale_string ("lock obtained on abandoned " | |
1302 | "mutex")); | |
1303 | *ret = 1; | |
1304 | break; | |
1305 | } | |
1306 | else if (scm_is_eq (m->owner, new_owner)) | |
1307 | { | |
1308 | if (m->recursive) | |
1309 | { | |
1310 | m->level++; | |
74926120 | 1311 | *ret = 1; |
adc085f1 JG |
1312 | } |
1313 | else | |
6180e336 | 1314 | { |
adc085f1 JG |
1315 | err = scm_cons (scm_misc_error_key, |
1316 | scm_from_locale_string ("mutex already locked " | |
1317 | "by thread")); | |
1318 | *ret = 0; | |
1319 | } | |
74926120 | 1320 | break; |
adc085f1 | 1321 | } |
9de87eea | 1322 | else |
9de87eea | 1323 | { |
74926120 | 1324 | if (timeout != NULL) |
adc085f1 JG |
1325 | { |
1326 | gettimeofday (¤t_time, NULL); | |
1327 | if (current_time.tv_sec > timeout->tv_sec || | |
1328 | (current_time.tv_sec == timeout->tv_sec && | |
1329 | current_time.tv_usec * 1000 > timeout->tv_nsec)) | |
6180e336 | 1330 | { |
adc085f1 JG |
1331 | *ret = 0; |
1332 | break; | |
6180e336 | 1333 | } |
6180e336 | 1334 | } |
37a52039 | 1335 | block_self (m->waiting, mutex, &m->lock, timeout); |
9de87eea MV |
1336 | scm_i_pthread_mutex_unlock (&m->lock); |
1337 | SCM_TICK; | |
1338 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
1339 | } | |
1340 | } | |
1341 | scm_i_pthread_mutex_unlock (&m->lock); | |
6180e336 | 1342 | return err; |
9de87eea MV |
1343 | } |
1344 | ||
6180e336 NJ |
1345 | SCM scm_lock_mutex (SCM mx) |
1346 | { | |
adc085f1 | 1347 | return scm_lock_mutex_timed (mx, SCM_UNDEFINED, SCM_UNDEFINED); |
6180e336 NJ |
1348 | } |
1349 | ||
adc085f1 JG |
1350 | SCM_DEFINE (scm_lock_mutex_timed, "lock-mutex", 1, 2, 0, |
1351 | (SCM m, SCM timeout, SCM owner), | |
9bc4701c MD |
1352 | "Lock @var{mutex}. If the mutex is already locked, the calling thread " |
1353 | "blocks until the mutex becomes available. The function returns when " | |
1354 | "the calling thread owns the lock on @var{mutex}. Locking a mutex that " | |
1355 | "a thread already owns will succeed right away and will not block the " | |
1356 | "thread. That is, Guile's mutexes are @emph{recursive}. ") | |
6180e336 | 1357 | #define FUNC_NAME s_scm_lock_mutex_timed |
9bc4701c | 1358 | { |
6180e336 NJ |
1359 | SCM exception; |
1360 | int ret = 0; | |
1361 | scm_t_timespec cwaittime, *waittime = NULL; | |
76da80e7 | 1362 | |
6180e336 NJ |
1363 | SCM_VALIDATE_MUTEX (1, m); |
1364 | ||
1365 | if (! SCM_UNBNDP (timeout) && ! scm_is_false (timeout)) | |
1366 | { | |
1367 | to_timespec (timeout, &cwaittime); | |
1368 | waittime = &cwaittime; | |
1369 | } | |
1370 | ||
adc085f1 | 1371 | exception = fat_mutex_lock (m, waittime, owner, &ret); |
6180e336 NJ |
1372 | if (!scm_is_false (exception)) |
1373 | scm_ithrow (SCM_CAR (exception), scm_list_1 (SCM_CDR (exception)), 1); | |
1374 | return ret ? SCM_BOOL_T : SCM_BOOL_F; | |
9bc4701c | 1375 | } |
76da80e7 | 1376 | #undef FUNC_NAME |
9bc4701c | 1377 | |
a4d106c7 | 1378 | void |
661ae7ab | 1379 | scm_dynwind_lock_mutex (SCM mutex) |
a4d106c7 | 1380 | { |
661ae7ab MV |
1381 | scm_dynwind_unwind_handler_with_scm ((void(*)(SCM))scm_unlock_mutex, mutex, |
1382 | SCM_F_WIND_EXPLICITLY); | |
1383 | scm_dynwind_rewind_handler_with_scm ((void(*)(SCM))scm_lock_mutex, mutex, | |
1384 | SCM_F_WIND_EXPLICITLY); | |
a4d106c7 MV |
1385 | } |
1386 | ||
9bc4701c | 1387 | SCM_DEFINE (scm_try_mutex, "try-mutex", 1, 0, 0, |
ba1b7223 | 1388 | (SCM mutex), |
9bc4701c MD |
1389 | "Try to lock @var{mutex}. If the mutex is already locked by someone " |
1390 | "else, return @code{#f}. Else lock the mutex and return @code{#t}. ") | |
1391 | #define FUNC_NAME s_scm_try_mutex | |
1392 | { | |
6180e336 NJ |
1393 | SCM exception; |
1394 | int ret = 0; | |
1395 | scm_t_timespec cwaittime, *waittime = NULL; | |
9de87eea | 1396 | |
ba1b7223 | 1397 | SCM_VALIDATE_MUTEX (1, mutex); |
6180e336 NJ |
1398 | |
1399 | to_timespec (scm_from_int(0), &cwaittime); | |
1400 | waittime = &cwaittime; | |
74926120 | 1401 | |
adc085f1 | 1402 | exception = fat_mutex_lock (mutex, waittime, SCM_UNDEFINED, &ret); |
6180e336 NJ |
1403 | if (!scm_is_false (exception)) |
1404 | scm_ithrow (SCM_CAR (exception), scm_list_1 (SCM_CDR (exception)), 1); | |
1405 | return ret ? SCM_BOOL_T : SCM_BOOL_F; | |
9de87eea MV |
1406 | } |
1407 | #undef FUNC_NAME | |
76da80e7 | 1408 | |
6180e336 NJ |
1409 | /*** Fat condition variables */ |
1410 | ||
1411 | typedef struct { | |
1412 | scm_i_pthread_mutex_t lock; | |
1413 | SCM waiting; /* the threads waiting for this condition. */ | |
1414 | } fat_cond; | |
1415 | ||
1416 | #define SCM_CONDVARP(x) SCM_SMOB_PREDICATE (scm_tc16_condvar, x) | |
1417 | #define SCM_CONDVAR_DATA(x) ((fat_cond *) SCM_SMOB_DATA (x)) | |
1418 | ||
1419 | static int | |
1420 | fat_mutex_unlock (SCM mutex, SCM cond, | |
1421 | const scm_t_timespec *waittime, int relock) | |
9de87eea | 1422 | { |
7f991c7d | 1423 | SCM owner; |
6180e336 NJ |
1424 | fat_mutex *m = SCM_MUTEX_DATA (mutex); |
1425 | fat_cond *c = NULL; | |
1426 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1427 | int err = 0, ret = 0; | |
9de87eea MV |
1428 | |
1429 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
adc085f1 | 1430 | |
7f991c7d | 1431 | owner = m->owner; |
adc085f1 | 1432 | |
d31ae2c3 | 1433 | if (!scm_is_eq (owner, t->handle)) |
9bc4701c | 1434 | { |
adc085f1 | 1435 | if (m->level == 0) |
6180e336 NJ |
1436 | { |
1437 | if (!m->unchecked_unlock) | |
2a1d0688 NJ |
1438 | { |
1439 | scm_i_pthread_mutex_unlock (&m->lock); | |
1440 | scm_misc_error (NULL, "mutex not locked", SCM_EOL); | |
1441 | } | |
d31ae2c3 | 1442 | owner = t->handle; |
6180e336 NJ |
1443 | } |
1444 | else if (!m->allow_external_unlock) | |
2a1d0688 NJ |
1445 | { |
1446 | scm_i_pthread_mutex_unlock (&m->lock); | |
1447 | scm_misc_error (NULL, "mutex not locked by current thread", SCM_EOL); | |
1448 | } | |
6180e336 NJ |
1449 | } |
1450 | ||
1451 | if (! (SCM_UNBNDP (cond))) | |
1452 | { | |
6180e336 NJ |
1453 | c = SCM_CONDVAR_DATA (cond); |
1454 | while (1) | |
1455 | { | |
1456 | int brk = 0; | |
1457 | ||
6180e336 NJ |
1458 | if (m->level > 0) |
1459 | m->level--; | |
adc085f1 | 1460 | if (m->level == 0) |
f57fdf07 LC |
1461 | { |
1462 | /* Change the owner of MUTEX. */ | |
1463 | t->mutexes = scm_delq_x (mutex, t->mutexes); | |
1464 | m->owner = unblock_from_queue (m->waiting); | |
1465 | } | |
adc085f1 | 1466 | |
6180e336 | 1467 | t->block_asyncs++; |
74926120 | 1468 | |
d2a51087 NJ |
1469 | err = block_self (c->waiting, cond, &m->lock, waittime); |
1470 | scm_i_pthread_mutex_unlock (&m->lock); | |
6180e336 NJ |
1471 | |
1472 | if (err == 0) | |
1473 | { | |
1474 | ret = 1; | |
1475 | brk = 1; | |
1476 | } | |
1477 | else if (err == ETIMEDOUT) | |
1478 | { | |
1479 | ret = 0; | |
1480 | brk = 1; | |
1481 | } | |
1482 | else if (err != EINTR) | |
74926120 | 1483 | { |
6180e336 | 1484 | errno = err; |
6180e336 | 1485 | scm_syserror (NULL); |
74926120 | 1486 | } |
6180e336 NJ |
1487 | |
1488 | if (brk) | |
1489 | { | |
1490 | if (relock) | |
adc085f1 | 1491 | scm_lock_mutex_timed (mutex, SCM_UNDEFINED, owner); |
4201062d | 1492 | t->block_asyncs--; |
6180e336 NJ |
1493 | break; |
1494 | } | |
74926120 | 1495 | |
6180e336 NJ |
1496 | t->block_asyncs--; |
1497 | scm_async_click (); | |
74926120 | 1498 | |
6180e336 NJ |
1499 | scm_remember_upto_here_2 (cond, mutex); |
1500 | ||
1501 | scm_i_scm_pthread_mutex_lock (&m->lock); | |
1502 | } | |
9bc4701c | 1503 | } |
9de87eea | 1504 | else |
6180e336 NJ |
1505 | { |
1506 | if (m->level > 0) | |
1507 | m->level--; | |
74926120 | 1508 | if (m->level == 0) |
f57fdf07 LC |
1509 | { |
1510 | /* Change the owner of MUTEX. */ | |
1511 | t->mutexes = scm_delq_x (mutex, t->mutexes); | |
1512 | m->owner = unblock_from_queue (m->waiting); | |
1513 | } | |
74926120 | 1514 | |
6180e336 NJ |
1515 | scm_i_pthread_mutex_unlock (&m->lock); |
1516 | ret = 1; | |
1517 | } | |
9de87eea | 1518 | |
6180e336 | 1519 | return ret; |
9bc4701c | 1520 | } |
9bc4701c | 1521 | |
6180e336 NJ |
1522 | SCM scm_unlock_mutex (SCM mx) |
1523 | { | |
1524 | return scm_unlock_mutex_timed (mx, SCM_UNDEFINED, SCM_UNDEFINED); | |
9bc4701c | 1525 | } |
9bc4701c | 1526 | |
6180e336 NJ |
1527 | SCM_DEFINE (scm_unlock_mutex_timed, "unlock-mutex", 1, 2, 0, |
1528 | (SCM mx, SCM cond, SCM timeout), | |
9bc4701c MD |
1529 | "Unlocks @var{mutex} if the calling thread owns the lock on " |
1530 | "@var{mutex}. Calling unlock-mutex on a mutex not owned by the current " | |
1531 | "thread results in undefined behaviour. Once a mutex has been unlocked, " | |
1532 | "one thread blocked on @var{mutex} is awakened and grabs the mutex " | |
1533 | "lock. Every call to @code{lock-mutex} by this thread must be matched " | |
1534 | "with a call to @code{unlock-mutex}. Only the last call to " | |
1535 | "@code{unlock-mutex} will actually unlock the mutex. ") | |
6180e336 | 1536 | #define FUNC_NAME s_scm_unlock_mutex_timed |
9bc4701c | 1537 | { |
6180e336 NJ |
1538 | scm_t_timespec cwaittime, *waittime = NULL; |
1539 | ||
9bc4701c | 1540 | SCM_VALIDATE_MUTEX (1, mx); |
6180e336 NJ |
1541 | if (! (SCM_UNBNDP (cond))) |
1542 | { | |
1543 | SCM_VALIDATE_CONDVAR (2, cond); | |
1544 | ||
1545 | if (! (SCM_UNBNDP (timeout))) | |
1546 | { | |
1547 | to_timespec (timeout, &cwaittime); | |
1548 | waittime = &cwaittime; | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | return fat_mutex_unlock (mx, cond, waittime, 0) ? SCM_BOOL_T : SCM_BOOL_F; | |
9bc4701c MD |
1553 | } |
1554 | #undef FUNC_NAME | |
1555 | ||
6180e336 NJ |
1556 | SCM_DEFINE (scm_mutex_p, "mutex?", 1, 0, 0, |
1557 | (SCM obj), | |
1558 | "Return @code{#t} if @var{obj} is a mutex.") | |
1559 | #define FUNC_NAME s_scm_mutex_p | |
1560 | { | |
1561 | return SCM_MUTEXP (obj) ? SCM_BOOL_T : SCM_BOOL_F; | |
1562 | } | |
74926120 | 1563 | #undef FUNC_NAME |
9de87eea MV |
1564 | |
1565 | SCM_DEFINE (scm_mutex_owner, "mutex-owner", 1, 0, 0, | |
1566 | (SCM mx), | |
1567 | "Return the thread owning @var{mx}, or @code{#f}.") | |
1568 | #define FUNC_NAME s_scm_mutex_owner | |
1569 | { | |
adc085f1 JG |
1570 | SCM owner; |
1571 | fat_mutex *m = NULL; | |
1572 | ||
9de87eea | 1573 | SCM_VALIDATE_MUTEX (1, mx); |
adc085f1 JG |
1574 | m = SCM_MUTEX_DATA (mx); |
1575 | scm_i_pthread_mutex_lock (&m->lock); | |
1576 | owner = m->owner; | |
1577 | scm_i_pthread_mutex_unlock (&m->lock); | |
1578 | ||
1579 | return owner; | |
9de87eea MV |
1580 | } |
1581 | #undef FUNC_NAME | |
1582 | ||
1583 | SCM_DEFINE (scm_mutex_level, "mutex-level", 1, 0, 0, | |
1584 | (SCM mx), | |
adc085f1 | 1585 | "Return the lock level of mutex @var{mx}.") |
9de87eea MV |
1586 | #define FUNC_NAME s_scm_mutex_level |
1587 | { | |
1588 | SCM_VALIDATE_MUTEX (1, mx); | |
1589 | return scm_from_int (SCM_MUTEX_DATA(mx)->level); | |
1590 | } | |
1591 | #undef FUNC_NAME | |
1592 | ||
adc085f1 JG |
1593 | SCM_DEFINE (scm_mutex_locked_p, "mutex-locked?", 1, 0, 0, |
1594 | (SCM mx), | |
1595 | "Returns @code{#t} if the mutex @var{mx} is locked.") | |
1596 | #define FUNC_NAME s_scm_mutex_locked_p | |
1597 | { | |
1598 | SCM_VALIDATE_MUTEX (1, mx); | |
1599 | return SCM_MUTEX_DATA (mx)->level > 0 ? SCM_BOOL_T : SCM_BOOL_F; | |
1600 | } | |
1601 | #undef FUNC_NAME | |
9de87eea | 1602 | |
9de87eea MV |
1603 | static int |
1604 | fat_cond_print (SCM cv, SCM port, scm_print_state *pstate SCM_UNUSED) | |
1605 | { | |
1606 | fat_cond *c = SCM_CONDVAR_DATA (cv); | |
1607 | scm_puts ("#<condition-variable ", port); | |
1608 | scm_uintprint ((scm_t_bits)c, 16, port); | |
1609 | scm_puts (">", port); | |
1610 | return 1; | |
1611 | } | |
9bc4701c | 1612 | |
d823b11b MV |
1613 | SCM_DEFINE (scm_make_condition_variable, "make-condition-variable", 0, 0, 0, |
1614 | (void), | |
1615 | "Make a new condition variable.") | |
1616 | #define FUNC_NAME s_scm_make_condition_variable | |
5f05c406 | 1617 | { |
9de87eea MV |
1618 | fat_cond *c; |
1619 | SCM cv; | |
1620 | ||
1621 | c = scm_gc_malloc (sizeof (fat_cond), "condition variable"); | |
9de87eea MV |
1622 | c->waiting = SCM_EOL; |
1623 | SCM_NEWSMOB (cv, scm_tc16_condvar, (scm_t_bits) c); | |
1624 | c->waiting = make_queue (); | |
d823b11b | 1625 | return cv; |
5f05c406 | 1626 | } |
d823b11b | 1627 | #undef FUNC_NAME |
5f05c406 | 1628 | |
d823b11b MV |
1629 | SCM_DEFINE (scm_timed_wait_condition_variable, "wait-condition-variable", 2, 1, 0, |
1630 | (SCM cv, SCM mx, SCM t), | |
1631 | "Wait until @var{cond-var} has been signalled. While waiting, " | |
1632 | "@var{mutex} is atomically unlocked (as with @code{unlock-mutex}) and " | |
1633 | "is locked again when this function returns. When @var{time} is given, " | |
1634 | "it specifies a point in time where the waiting should be aborted. It " | |
1635 | "can be either a integer as returned by @code{current-time} or a pair " | |
1636 | "as returned by @code{gettimeofday}. When the waiting is aborted the " | |
1637 | "mutex is locked and @code{#f} is returned. When the condition " | |
1638 | "variable is in fact signalled, the mutex is also locked and @code{#t} " | |
1639 | "is returned. ") | |
1640 | #define FUNC_NAME s_scm_timed_wait_condition_variable | |
5f05c406 | 1641 | { |
9de87eea | 1642 | scm_t_timespec waittime, *waitptr = NULL; |
d823b11b MV |
1643 | |
1644 | SCM_VALIDATE_CONDVAR (1, cv); | |
1645 | SCM_VALIDATE_MUTEX (2, mx); | |
74926120 | 1646 | |
d823b11b MV |
1647 | if (!SCM_UNBNDP (t)) |
1648 | { | |
6180e336 | 1649 | to_timespec (t, &waittime); |
9de87eea | 1650 | waitptr = &waittime; |
d823b11b MV |
1651 | } |
1652 | ||
2a1d0688 | 1653 | return fat_mutex_unlock (mx, cv, waitptr, 1) ? SCM_BOOL_T : SCM_BOOL_F; |
5f05c406 | 1654 | } |
d823b11b | 1655 | #undef FUNC_NAME |
5f05c406 | 1656 | |
9de87eea MV |
1657 | static void |
1658 | fat_cond_signal (fat_cond *c) | |
1659 | { | |
9de87eea | 1660 | unblock_from_queue (c->waiting); |
9de87eea MV |
1661 | } |
1662 | ||
d823b11b MV |
1663 | SCM_DEFINE (scm_signal_condition_variable, "signal-condition-variable", 1, 0, 0, |
1664 | (SCM cv), | |
1665 | "Wake up one thread that is waiting for @var{cv}") | |
1666 | #define FUNC_NAME s_scm_signal_condition_variable | |
5f05c406 | 1667 | { |
d823b11b | 1668 | SCM_VALIDATE_CONDVAR (1, cv); |
9de87eea | 1669 | fat_cond_signal (SCM_CONDVAR_DATA (cv)); |
d823b11b | 1670 | return SCM_BOOL_T; |
5f05c406 | 1671 | } |
d823b11b | 1672 | #undef FUNC_NAME |
5f05c406 | 1673 | |
9de87eea MV |
1674 | static void |
1675 | fat_cond_broadcast (fat_cond *c) | |
1676 | { | |
9de87eea MV |
1677 | while (scm_is_true (unblock_from_queue (c->waiting))) |
1678 | ; | |
9de87eea MV |
1679 | } |
1680 | ||
d823b11b MV |
1681 | SCM_DEFINE (scm_broadcast_condition_variable, "broadcast-condition-variable", 1, 0, 0, |
1682 | (SCM cv), | |
1683 | "Wake up all threads that are waiting for @var{cv}. ") | |
1684 | #define FUNC_NAME s_scm_broadcast_condition_variable | |
5f05c406 | 1685 | { |
d823b11b | 1686 | SCM_VALIDATE_CONDVAR (1, cv); |
9de87eea | 1687 | fat_cond_broadcast (SCM_CONDVAR_DATA (cv)); |
d823b11b | 1688 | return SCM_BOOL_T; |
5f05c406 | 1689 | } |
d823b11b | 1690 | #undef FUNC_NAME |
5f05c406 | 1691 | |
6180e336 NJ |
1692 | SCM_DEFINE (scm_condition_variable_p, "condition-variable?", 1, 0, 0, |
1693 | (SCM obj), | |
1694 | "Return @code{#t} if @var{obj} is a condition variable.") | |
1695 | #define FUNC_NAME s_scm_condition_variable_p | |
1696 | { | |
1697 | return SCM_CONDVARP(obj) ? SCM_BOOL_T : SCM_BOOL_F; | |
1698 | } | |
1699 | #undef FUNC_NAME | |
1700 | ||
6087fad9 | 1701 | |
8c2b3143 | 1702 | \f |
d823b11b MV |
1703 | /*** Select */ |
1704 | ||
8c2b3143 LC |
1705 | struct select_args |
1706 | { | |
1707 | int nfds; | |
1708 | SELECT_TYPE *read_fds; | |
1709 | SELECT_TYPE *write_fds; | |
1710 | SELECT_TYPE *except_fds; | |
1711 | struct timeval *timeout; | |
1712 | ||
1713 | int result; | |
1714 | int errno_value; | |
1715 | }; | |
1716 | ||
1717 | static void * | |
1718 | do_std_select (void *args) | |
1719 | { | |
1720 | struct select_args *select_args; | |
1721 | ||
1722 | select_args = (struct select_args *) args; | |
1723 | ||
1724 | select_args->result = | |
1725 | select (select_args->nfds, | |
1726 | select_args->read_fds, select_args->write_fds, | |
1727 | select_args->except_fds, select_args->timeout); | |
1728 | select_args->errno_value = errno; | |
1729 | ||
1730 | return NULL; | |
1731 | } | |
1732 | ||
911782b7 | 1733 | int |
9de87eea MV |
1734 | scm_std_select (int nfds, |
1735 | SELECT_TYPE *readfds, | |
1736 | SELECT_TYPE *writefds, | |
1737 | SELECT_TYPE *exceptfds, | |
1738 | struct timeval *timeout) | |
1739 | { | |
1740 | fd_set my_readfds; | |
1741 | int res, eno, wakeup_fd; | |
1742 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
8c2b3143 | 1743 | struct select_args args; |
9de87eea MV |
1744 | |
1745 | if (readfds == NULL) | |
1746 | { | |
1747 | FD_ZERO (&my_readfds); | |
1748 | readfds = &my_readfds; | |
1749 | } | |
1750 | ||
1751 | while (scm_i_setup_sleep (t, SCM_BOOL_F, NULL, t->sleep_pipe[1])) | |
1752 | SCM_TICK; | |
1753 | ||
1754 | wakeup_fd = t->sleep_pipe[0]; | |
9de87eea MV |
1755 | FD_SET (wakeup_fd, readfds); |
1756 | if (wakeup_fd >= nfds) | |
1757 | nfds = wakeup_fd+1; | |
9de87eea | 1758 | |
8c2b3143 LC |
1759 | args.nfds = nfds; |
1760 | args.read_fds = readfds; | |
1761 | args.write_fds = writefds; | |
1762 | args.except_fds = exceptfds; | |
1763 | args.timeout = timeout; | |
1764 | ||
1765 | /* Explicitly cooperate with the GC. */ | |
1766 | scm_without_guile (do_std_select, &args); | |
1767 | ||
1768 | res = args.result; | |
1769 | eno = args.errno_value; | |
1770 | ||
1771 | t->sleep_fd = -1; | |
9de87eea MV |
1772 | scm_i_reset_sleep (t); |
1773 | ||
1774 | if (res > 0 && FD_ISSET (wakeup_fd, readfds)) | |
1775 | { | |
1776 | char dummy; | |
634aa8de LC |
1777 | full_read (wakeup_fd, &dummy, 1); |
1778 | ||
9de87eea MV |
1779 | FD_CLR (wakeup_fd, readfds); |
1780 | res -= 1; | |
1781 | if (res == 0) | |
1782 | { | |
1783 | eno = EINTR; | |
1784 | res = -1; | |
1785 | } | |
1786 | } | |
d823b11b MV |
1787 | errno = eno; |
1788 | return res; | |
5f05c406 MV |
1789 | } |
1790 | ||
9de87eea | 1791 | /* Convenience API for blocking while in guile mode. */ |
76da80e7 | 1792 | |
9de87eea | 1793 | #if SCM_USE_PTHREAD_THREADS |
92e64b87 | 1794 | |
2956b071 LC |
1795 | /* It seems reasonable to not run procedures related to mutex and condition |
1796 | variables within `GC_do_blocking ()' since, (i) the GC can operate even | |
1797 | without it, and (ii) the only potential gain would be GC latency. See | |
1798 | http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/2245/focus=2251 | |
1799 | for a discussion of the pros and cons. */ | |
1800 | ||
9bc4701c | 1801 | int |
9de87eea | 1802 | scm_pthread_mutex_lock (scm_i_pthread_mutex_t *mutex) |
9bc4701c | 1803 | { |
9de87eea | 1804 | int res = scm_i_pthread_mutex_lock (mutex); |
9bc4701c MD |
1805 | return res; |
1806 | } | |
1807 | ||
9de87eea | 1808 | static void |
2b829bbb | 1809 | do_unlock (void *data) |
28d52ebb | 1810 | { |
9de87eea | 1811 | scm_i_pthread_mutex_unlock ((scm_i_pthread_mutex_t *)data); |
28d52ebb MD |
1812 | } |
1813 | ||
1814 | void | |
661ae7ab | 1815 | scm_dynwind_pthread_mutex_lock (scm_i_pthread_mutex_t *mutex) |
28d52ebb | 1816 | { |
9de87eea | 1817 | scm_i_scm_pthread_mutex_lock (mutex); |
2b829bbb | 1818 | scm_dynwind_unwind_handler (do_unlock, mutex, SCM_F_WIND_EXPLICITLY); |
28d52ebb MD |
1819 | } |
1820 | ||
9bc4701c | 1821 | int |
9de87eea | 1822 | scm_pthread_cond_wait (scm_i_pthread_cond_t *cond, scm_i_pthread_mutex_t *mutex) |
9bc4701c | 1823 | { |
4cf72f0b LC |
1824 | int res; |
1825 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1826 | ||
1827 | t->held_mutex = mutex; | |
1828 | res = scm_i_pthread_cond_wait (cond, mutex); | |
1829 | t->held_mutex = NULL; | |
1830 | ||
9bc4701c MD |
1831 | return res; |
1832 | } | |
9bc4701c | 1833 | |
76da80e7 | 1834 | int |
9de87eea MV |
1835 | scm_pthread_cond_timedwait (scm_i_pthread_cond_t *cond, |
1836 | scm_i_pthread_mutex_t *mutex, | |
1837 | const scm_t_timespec *wt) | |
76da80e7 | 1838 | { |
4cf72f0b LC |
1839 | int res; |
1840 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1841 | ||
1842 | t->held_mutex = mutex; | |
1843 | res = scm_i_pthread_cond_timedwait (cond, mutex, wt); | |
1844 | t->held_mutex = NULL; | |
1845 | ||
9de87eea | 1846 | return res; |
76da80e7 MV |
1847 | } |
1848 | ||
9de87eea | 1849 | #endif |
76da80e7 | 1850 | |
d823b11b | 1851 | unsigned long |
9de87eea | 1852 | scm_std_usleep (unsigned long usecs) |
5f05c406 | 1853 | { |
d823b11b MV |
1854 | struct timeval tv; |
1855 | tv.tv_usec = usecs % 1000000; | |
1856 | tv.tv_sec = usecs / 1000000; | |
9de87eea MV |
1857 | scm_std_select (0, NULL, NULL, NULL, &tv); |
1858 | return tv.tv_sec * 1000000 + tv.tv_usec; | |
5f05c406 MV |
1859 | } |
1860 | ||
9de87eea MV |
1861 | unsigned int |
1862 | scm_std_sleep (unsigned int secs) | |
6c214b62 | 1863 | { |
d823b11b MV |
1864 | struct timeval tv; |
1865 | tv.tv_usec = 0; | |
1866 | tv.tv_sec = secs; | |
9de87eea | 1867 | scm_std_select (0, NULL, NULL, NULL, &tv); |
d823b11b | 1868 | return tv.tv_sec; |
6c214b62 MD |
1869 | } |
1870 | ||
d823b11b MV |
1871 | /*** Misc */ |
1872 | ||
1873 | SCM_DEFINE (scm_current_thread, "current-thread", 0, 0, 0, | |
1874 | (void), | |
1875 | "Return the thread that called this function.") | |
1876 | #define FUNC_NAME s_scm_current_thread | |
1877 | { | |
9de87eea | 1878 | return SCM_I_CURRENT_THREAD->handle; |
d823b11b MV |
1879 | } |
1880 | #undef FUNC_NAME | |
1881 | ||
9de87eea MV |
1882 | static SCM |
1883 | scm_c_make_list (size_t n, SCM fill) | |
1884 | { | |
1885 | SCM res = SCM_EOL; | |
1886 | while (n-- > 0) | |
1887 | res = scm_cons (fill, res); | |
1888 | return res; | |
1889 | } | |
1890 | ||
d823b11b MV |
1891 | SCM_DEFINE (scm_all_threads, "all-threads", 0, 0, 0, |
1892 | (void), | |
1893 | "Return a list of all threads.") | |
9bc4701c | 1894 | #define FUNC_NAME s_scm_all_threads |
d823b11b | 1895 | { |
9de87eea MV |
1896 | /* We can not allocate while holding the thread_admin_mutex because |
1897 | of the way GC is done. | |
1898 | */ | |
1899 | int n = thread_count; | |
1900 | scm_i_thread *t; | |
1901 | SCM list = scm_c_make_list (n, SCM_UNSPECIFIED), *l; | |
d823b11b | 1902 | |
9de87eea MV |
1903 | scm_i_pthread_mutex_lock (&thread_admin_mutex); |
1904 | l = &list; | |
1905 | for (t = all_threads; t && n > 0; t = t->next_thread) | |
1906 | { | |
2e77f720 LC |
1907 | if (t != scm_i_signal_delivery_thread) |
1908 | { | |
1909 | SCM_SETCAR (*l, t->handle); | |
1910 | l = SCM_CDRLOC (*l); | |
1911 | } | |
9de87eea MV |
1912 | n--; |
1913 | } | |
1914 | *l = SCM_EOL; | |
1915 | scm_i_pthread_mutex_unlock (&thread_admin_mutex); | |
1916 | return list; | |
d823b11b | 1917 | } |
9de87eea | 1918 | #undef FUNC_NAME |
d823b11b MV |
1919 | |
1920 | SCM_DEFINE (scm_thread_exited_p, "thread-exited?", 1, 0, 0, | |
1921 | (SCM thread), | |
1922 | "Return @code{#t} iff @var{thread} has exited.\n") | |
1923 | #define FUNC_NAME s_scm_thread_exited_p | |
1924 | { | |
7888309b | 1925 | return scm_from_bool (scm_c_thread_exited_p (thread)); |
d823b11b MV |
1926 | } |
1927 | #undef FUNC_NAME | |
1928 | ||
911782b7 | 1929 | int |
d823b11b MV |
1930 | scm_c_thread_exited_p (SCM thread) |
1931 | #define FUNC_NAME s_scm_thread_exited_p | |
5f05c406 | 1932 | { |
9de87eea | 1933 | scm_i_thread *t; |
d823b11b | 1934 | SCM_VALIDATE_THREAD (1, thread); |
9de87eea | 1935 | t = SCM_I_THREAD_DATA (thread); |
d823b11b | 1936 | return t->exited; |
5f05c406 | 1937 | } |
d823b11b | 1938 | #undef FUNC_NAME |
5f05c406 | 1939 | |
9de87eea | 1940 | static scm_i_pthread_cond_t wake_up_cond; |
9bc4701c MD |
1941 | static int threads_initialized_p = 0; |
1942 | ||
9bc4701c | 1943 | |
a4d106c7 MV |
1944 | /* This mutex is used by SCM_CRITICAL_SECTION_START/END. |
1945 | */ | |
d1138028 | 1946 | scm_i_pthread_mutex_t scm_i_critical_section_mutex; |
a4d106c7 | 1947 | |
661ae7ab | 1948 | static SCM dynwind_critical_section_mutex; |
a54a94b3 | 1949 | |
9bc4701c | 1950 | void |
661ae7ab | 1951 | scm_dynwind_critical_section (SCM mutex) |
76da80e7 | 1952 | { |
a4d106c7 | 1953 | if (scm_is_false (mutex)) |
661ae7ab MV |
1954 | mutex = dynwind_critical_section_mutex; |
1955 | scm_dynwind_lock_mutex (mutex); | |
1956 | scm_dynwind_block_asyncs (); | |
9de87eea MV |
1957 | } |
1958 | ||
1959 | /*** Initialization */ | |
1960 | ||
9de87eea MV |
1961 | scm_i_pthread_mutex_t scm_i_misc_mutex; |
1962 | ||
d1138028 MV |
1963 | #if SCM_USE_PTHREAD_THREADS |
1964 | pthread_mutexattr_t scm_i_pthread_mutexattr_recursive[1]; | |
1965 | #endif | |
1966 | ||
9de87eea MV |
1967 | void |
1968 | scm_threads_prehistory (SCM_STACKITEM *base) | |
1969 | { | |
d1138028 MV |
1970 | #if SCM_USE_PTHREAD_THREADS |
1971 | pthread_mutexattr_init (scm_i_pthread_mutexattr_recursive); | |
1972 | pthread_mutexattr_settype (scm_i_pthread_mutexattr_recursive, | |
1973 | PTHREAD_MUTEX_RECURSIVE); | |
1974 | #endif | |
1975 | ||
1976 | scm_i_pthread_mutex_init (&scm_i_critical_section_mutex, | |
1977 | scm_i_pthread_mutexattr_recursive); | |
9de87eea MV |
1978 | scm_i_pthread_mutex_init (&scm_i_misc_mutex, NULL); |
1979 | scm_i_pthread_cond_init (&wake_up_cond, NULL); | |
74926120 | 1980 | |
9de87eea | 1981 | guilify_self_1 (base); |
9bc4701c MD |
1982 | } |
1983 | ||
d823b11b MV |
1984 | scm_t_bits scm_tc16_thread; |
1985 | scm_t_bits scm_tc16_mutex; | |
1986 | scm_t_bits scm_tc16_condvar; | |
7bfd3b9e | 1987 | |
7bfd3b9e | 1988 | void |
9de87eea | 1989 | scm_init_threads () |
7bfd3b9e | 1990 | { |
9de87eea | 1991 | scm_tc16_thread = scm_make_smob_type ("thread", sizeof (scm_i_thread)); |
d823b11b | 1992 | scm_set_smob_print (scm_tc16_thread, thread_print); |
d823b11b | 1993 | |
9de87eea | 1994 | scm_tc16_mutex = scm_make_smob_type ("mutex", sizeof (fat_mutex)); |
9de87eea MV |
1995 | scm_set_smob_print (scm_tc16_mutex, fat_mutex_print); |
1996 | scm_set_smob_free (scm_tc16_mutex, fat_mutex_free); | |
9bc4701c | 1997 | |
9de87eea MV |
1998 | scm_tc16_condvar = scm_make_smob_type ("condition-variable", |
1999 | sizeof (fat_cond)); | |
9de87eea | 2000 | scm_set_smob_print (scm_tc16_condvar, fat_cond_print); |
d823b11b | 2001 | |
9de87eea MV |
2002 | scm_i_default_dynamic_state = SCM_BOOL_F; |
2003 | guilify_self_2 (SCM_BOOL_F); | |
9bc4701c | 2004 | threads_initialized_p = 1; |
a4d106c7 | 2005 | |
f39448c5 | 2006 | dynwind_critical_section_mutex = scm_make_recursive_mutex (); |
7bfd3b9e | 2007 | } |
89e00824 | 2008 | |
5f05c406 | 2009 | void |
9de87eea | 2010 | scm_init_threads_default_dynamic_state () |
5f05c406 | 2011 | { |
9de87eea | 2012 | SCM state = scm_make_dynamic_state (scm_current_dynamic_state ()); |
f39448c5 | 2013 | scm_i_default_dynamic_state = state; |
5f05c406 MV |
2014 | } |
2015 | ||
d823b11b | 2016 | void |
9de87eea | 2017 | scm_init_thread_procs () |
d823b11b | 2018 | { |
9de87eea | 2019 | #include "libguile/threads.x" |
d823b11b MV |
2020 | } |
2021 | ||
3c13664e LC |
2022 | \f |
2023 | /* IA64-specific things. */ | |
2024 | ||
2025 | #ifdef __ia64__ | |
2026 | # ifdef __hpux | |
2027 | # include <sys/param.h> | |
2028 | # include <sys/pstat.h> | |
2029 | void * | |
2030 | scm_ia64_register_backing_store_base (void) | |
2031 | { | |
2032 | struct pst_vm_status vm_status; | |
2033 | int i = 0; | |
2034 | while (pstat_getprocvm (&vm_status, sizeof (vm_status), 0, i++) == 1) | |
2035 | if (vm_status.pst_type == PS_RSESTACK) | |
2036 | return (void *) vm_status.pst_vaddr; | |
2037 | abort (); | |
2038 | } | |
2039 | void * | |
2040 | scm_ia64_ar_bsp (const void *ctx) | |
2041 | { | |
2042 | uint64_t bsp; | |
2043 | __uc_get_ar_bsp (ctx, &bsp); | |
2044 | return (void *) bsp; | |
2045 | } | |
2046 | # endif /* hpux */ | |
2047 | # ifdef linux | |
2048 | # include <ucontext.h> | |
2049 | void * | |
2050 | scm_ia64_register_backing_store_base (void) | |
2051 | { | |
2052 | extern void *__libc_ia64_register_backing_store_base; | |
2053 | return __libc_ia64_register_backing_store_base; | |
2054 | } | |
2055 | void * | |
2056 | scm_ia64_ar_bsp (const void *opaque) | |
2057 | { | |
2058 | const ucontext_t *ctx = opaque; | |
2059 | return (void *) ctx->uc_mcontext.sc_ar_bsp; | |
2060 | } | |
2061 | # endif /* linux */ | |
2062 | #endif /* __ia64__ */ | |
2063 | ||
2064 | ||
89e00824 ML |
2065 | /* |
2066 | Local Variables: | |
2067 | c-file-style: "gnu" | |
2068 | End: | |
2069 | */ |