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Commit | Line | Data |
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e5d355d1 AL |
1 | /* |
2 | * Wrappers around mutex/cond/thread functions | |
3 | * | |
4 | * Copyright Red Hat, Inc. 2009 | |
5 | * | |
6 | * Author: | |
7 | * Marcelo Tosatti <mtosatti@redhat.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
aafd7584 | 13 | #include "qemu/osdep.h" |
1de7afc9 | 14 | #include "qemu/thread.h" |
c7c4d063 | 15 | #include "qemu/atomic.h" |
ef57137f | 16 | #include "qemu/notify.h" |
f1aff7aa | 17 | #include "qemu-thread-common.h" |
e5d355d1 | 18 | |
8f480de0 DDAG |
19 | static bool name_threads; |
20 | ||
21 | void qemu_thread_naming(bool enable) | |
22 | { | |
23 | name_threads = enable; | |
5c312079 DDAG |
24 | |
25 | #ifndef CONFIG_THREAD_SETNAME_BYTHREAD | |
26 | /* This is a debugging option, not fatal */ | |
27 | if (enable) { | |
28 | fprintf(stderr, "qemu: thread naming not supported on this host\n"); | |
29 | } | |
30 | #endif | |
8f480de0 DDAG |
31 | } |
32 | ||
e5d355d1 AL |
33 | static void error_exit(int err, const char *msg) |
34 | { | |
35 | fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err)); | |
53380ac3 | 36 | abort(); |
e5d355d1 AL |
37 | } |
38 | ||
3dcc9c6e YK |
39 | static void compute_abs_deadline(struct timespec *ts, int ms) |
40 | { | |
41 | struct timeval tv; | |
42 | gettimeofday(&tv, NULL); | |
43 | ts->tv_nsec = tv.tv_usec * 1000 + (ms % 1000) * 1000000; | |
44 | ts->tv_sec = tv.tv_sec + ms / 1000; | |
45 | if (ts->tv_nsec >= 1000000000) { | |
46 | ts->tv_sec++; | |
47 | ts->tv_nsec -= 1000000000; | |
48 | } | |
49 | } | |
50 | ||
e5d355d1 AL |
51 | void qemu_mutex_init(QemuMutex *mutex) |
52 | { | |
53 | int err; | |
54 | ||
24fa9049 | 55 | err = pthread_mutex_init(&mutex->lock, NULL); |
e5d355d1 AL |
56 | if (err) |
57 | error_exit(err, __func__); | |
f1aff7aa | 58 | qemu_mutex_post_init(mutex); |
e5d355d1 AL |
59 | } |
60 | ||
313b1d69 CC |
61 | void qemu_mutex_destroy(QemuMutex *mutex) |
62 | { | |
63 | int err; | |
64 | ||
c096358e FZ |
65 | assert(mutex->initialized); |
66 | mutex->initialized = false; | |
313b1d69 CC |
67 | err = pthread_mutex_destroy(&mutex->lock); |
68 | if (err) | |
69 | error_exit(err, __func__); | |
70 | } | |
71 | ||
6c27a0de | 72 | void qemu_mutex_lock_impl(QemuMutex *mutex, const char *file, const int line) |
e5d355d1 AL |
73 | { |
74 | int err; | |
75 | ||
c096358e | 76 | assert(mutex->initialized); |
f1aff7aa | 77 | qemu_mutex_pre_lock(mutex, file, line); |
e5d355d1 AL |
78 | err = pthread_mutex_lock(&mutex->lock); |
79 | if (err) | |
80 | error_exit(err, __func__); | |
f1aff7aa | 81 | qemu_mutex_post_lock(mutex, file, line); |
e5d355d1 AL |
82 | } |
83 | ||
6c27a0de | 84 | int qemu_mutex_trylock_impl(QemuMutex *mutex, const char *file, const int line) |
e5d355d1 | 85 | { |
31f5a726 JRZ |
86 | int err; |
87 | ||
c096358e | 88 | assert(mutex->initialized); |
31f5a726 JRZ |
89 | err = pthread_mutex_trylock(&mutex->lock); |
90 | if (err == 0) { | |
f1aff7aa | 91 | qemu_mutex_post_lock(mutex, file, line); |
31f5a726 JRZ |
92 | return 0; |
93 | } | |
94 | if (err != EBUSY) { | |
95 | error_exit(err, __func__); | |
96 | } | |
97 | return -EBUSY; | |
e5d355d1 AL |
98 | } |
99 | ||
6c27a0de | 100 | void qemu_mutex_unlock_impl(QemuMutex *mutex, const char *file, const int line) |
e5d355d1 AL |
101 | { |
102 | int err; | |
103 | ||
c096358e | 104 | assert(mutex->initialized); |
f1aff7aa | 105 | qemu_mutex_pre_unlock(mutex, file, line); |
e5d355d1 AL |
106 | err = pthread_mutex_unlock(&mutex->lock); |
107 | if (err) | |
108 | error_exit(err, __func__); | |
109 | } | |
110 | ||
feadec63 PB |
111 | void qemu_rec_mutex_init(QemuRecMutex *mutex) |
112 | { | |
113 | int err; | |
114 | pthread_mutexattr_t attr; | |
115 | ||
116 | pthread_mutexattr_init(&attr); | |
117 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); | |
118 | err = pthread_mutex_init(&mutex->lock, &attr); | |
119 | pthread_mutexattr_destroy(&attr); | |
120 | if (err) { | |
121 | error_exit(err, __func__); | |
122 | } | |
c096358e | 123 | mutex->initialized = true; |
feadec63 PB |
124 | } |
125 | ||
e5d355d1 AL |
126 | void qemu_cond_init(QemuCond *cond) |
127 | { | |
128 | int err; | |
129 | ||
130 | err = pthread_cond_init(&cond->cond, NULL); | |
131 | if (err) | |
132 | error_exit(err, __func__); | |
c096358e | 133 | cond->initialized = true; |
e5d355d1 AL |
134 | } |
135 | ||
313b1d69 CC |
136 | void qemu_cond_destroy(QemuCond *cond) |
137 | { | |
138 | int err; | |
139 | ||
c096358e FZ |
140 | assert(cond->initialized); |
141 | cond->initialized = false; | |
313b1d69 CC |
142 | err = pthread_cond_destroy(&cond->cond); |
143 | if (err) | |
144 | error_exit(err, __func__); | |
145 | } | |
146 | ||
e5d355d1 AL |
147 | void qemu_cond_signal(QemuCond *cond) |
148 | { | |
149 | int err; | |
150 | ||
c096358e | 151 | assert(cond->initialized); |
e5d355d1 AL |
152 | err = pthread_cond_signal(&cond->cond); |
153 | if (err) | |
154 | error_exit(err, __func__); | |
155 | } | |
156 | ||
157 | void qemu_cond_broadcast(QemuCond *cond) | |
158 | { | |
159 | int err; | |
160 | ||
c096358e | 161 | assert(cond->initialized); |
e5d355d1 AL |
162 | err = pthread_cond_broadcast(&cond->cond); |
163 | if (err) | |
164 | error_exit(err, __func__); | |
165 | } | |
166 | ||
6c27a0de | 167 | void qemu_cond_wait_impl(QemuCond *cond, QemuMutex *mutex, const char *file, const int line) |
e5d355d1 AL |
168 | { |
169 | int err; | |
170 | ||
c096358e | 171 | assert(cond->initialized); |
f1aff7aa | 172 | qemu_mutex_pre_unlock(mutex, file, line); |
e5d355d1 | 173 | err = pthread_cond_wait(&cond->cond, &mutex->lock); |
f1aff7aa | 174 | qemu_mutex_post_lock(mutex, file, line); |
e5d355d1 AL |
175 | if (err) |
176 | error_exit(err, __func__); | |
177 | } | |
178 | ||
3dcc9c6e YK |
179 | bool qemu_cond_timedwait_impl(QemuCond *cond, QemuMutex *mutex, int ms, |
180 | const char *file, const int line) | |
181 | { | |
182 | int err; | |
183 | struct timespec ts; | |
184 | ||
185 | assert(cond->initialized); | |
186 | trace_qemu_mutex_unlock(mutex, file, line); | |
187 | compute_abs_deadline(&ts, ms); | |
188 | err = pthread_cond_timedwait(&cond->cond, &mutex->lock, &ts); | |
189 | trace_qemu_mutex_locked(mutex, file, line); | |
190 | if (err && err != ETIMEDOUT) { | |
191 | error_exit(err, __func__); | |
192 | } | |
193 | return err != ETIMEDOUT; | |
194 | } | |
195 | ||
38b14db3 PB |
196 | void qemu_sem_init(QemuSemaphore *sem, int init) |
197 | { | |
198 | int rc; | |
199 | ||
401bc051 | 200 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 PB |
201 | rc = pthread_mutex_init(&sem->lock, NULL); |
202 | if (rc != 0) { | |
203 | error_exit(rc, __func__); | |
204 | } | |
205 | rc = pthread_cond_init(&sem->cond, NULL); | |
206 | if (rc != 0) { | |
207 | error_exit(rc, __func__); | |
208 | } | |
209 | if (init < 0) { | |
210 | error_exit(EINVAL, __func__); | |
211 | } | |
212 | sem->count = init; | |
213 | #else | |
38b14db3 PB |
214 | rc = sem_init(&sem->sem, 0, init); |
215 | if (rc < 0) { | |
216 | error_exit(errno, __func__); | |
217 | } | |
c166cb72 | 218 | #endif |
c096358e | 219 | sem->initialized = true; |
38b14db3 PB |
220 | } |
221 | ||
222 | void qemu_sem_destroy(QemuSemaphore *sem) | |
223 | { | |
224 | int rc; | |
225 | ||
c096358e FZ |
226 | assert(sem->initialized); |
227 | sem->initialized = false; | |
401bc051 | 228 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 PB |
229 | rc = pthread_cond_destroy(&sem->cond); |
230 | if (rc < 0) { | |
231 | error_exit(rc, __func__); | |
232 | } | |
233 | rc = pthread_mutex_destroy(&sem->lock); | |
234 | if (rc < 0) { | |
235 | error_exit(rc, __func__); | |
236 | } | |
237 | #else | |
38b14db3 PB |
238 | rc = sem_destroy(&sem->sem); |
239 | if (rc < 0) { | |
240 | error_exit(errno, __func__); | |
241 | } | |
c166cb72 | 242 | #endif |
38b14db3 PB |
243 | } |
244 | ||
245 | void qemu_sem_post(QemuSemaphore *sem) | |
246 | { | |
247 | int rc; | |
248 | ||
c096358e | 249 | assert(sem->initialized); |
401bc051 | 250 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 | 251 | pthread_mutex_lock(&sem->lock); |
79761c66 | 252 | if (sem->count == UINT_MAX) { |
c166cb72 | 253 | rc = EINVAL; |
c166cb72 | 254 | } else { |
79761c66 IT |
255 | sem->count++; |
256 | rc = pthread_cond_signal(&sem->cond); | |
c166cb72 PB |
257 | } |
258 | pthread_mutex_unlock(&sem->lock); | |
259 | if (rc != 0) { | |
260 | error_exit(rc, __func__); | |
261 | } | |
262 | #else | |
38b14db3 PB |
263 | rc = sem_post(&sem->sem); |
264 | if (rc < 0) { | |
265 | error_exit(errno, __func__); | |
266 | } | |
c166cb72 PB |
267 | #endif |
268 | } | |
269 | ||
38b14db3 PB |
270 | int qemu_sem_timedwait(QemuSemaphore *sem, int ms) |
271 | { | |
272 | int rc; | |
c166cb72 PB |
273 | struct timespec ts; |
274 | ||
c096358e | 275 | assert(sem->initialized); |
401bc051 | 276 | #ifndef CONFIG_SEM_TIMEDWAIT |
79761c66 | 277 | rc = 0; |
c166cb72 PB |
278 | compute_abs_deadline(&ts, ms); |
279 | pthread_mutex_lock(&sem->lock); | |
79761c66 | 280 | while (sem->count == 0) { |
c166cb72 PB |
281 | rc = pthread_cond_timedwait(&sem->cond, &sem->lock, &ts); |
282 | if (rc == ETIMEDOUT) { | |
283 | break; | |
284 | } | |
285 | if (rc != 0) { | |
286 | error_exit(rc, __func__); | |
287 | } | |
288 | } | |
79761c66 IT |
289 | if (rc != ETIMEDOUT) { |
290 | --sem->count; | |
291 | } | |
c166cb72 PB |
292 | pthread_mutex_unlock(&sem->lock); |
293 | return (rc == ETIMEDOUT ? -1 : 0); | |
294 | #else | |
38b14db3 PB |
295 | if (ms <= 0) { |
296 | /* This is cheaper than sem_timedwait. */ | |
297 | do { | |
298 | rc = sem_trywait(&sem->sem); | |
299 | } while (rc == -1 && errno == EINTR); | |
300 | if (rc == -1 && errno == EAGAIN) { | |
301 | return -1; | |
302 | } | |
303 | } else { | |
c166cb72 | 304 | compute_abs_deadline(&ts, ms); |
38b14db3 PB |
305 | do { |
306 | rc = sem_timedwait(&sem->sem, &ts); | |
307 | } while (rc == -1 && errno == EINTR); | |
308 | if (rc == -1 && errno == ETIMEDOUT) { | |
309 | return -1; | |
310 | } | |
311 | } | |
312 | if (rc < 0) { | |
313 | error_exit(errno, __func__); | |
314 | } | |
315 | return 0; | |
c166cb72 | 316 | #endif |
38b14db3 PB |
317 | } |
318 | ||
319 | void qemu_sem_wait(QemuSemaphore *sem) | |
320 | { | |
79761c66 IT |
321 | int rc; |
322 | ||
c096358e | 323 | assert(sem->initialized); |
401bc051 | 324 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 | 325 | pthread_mutex_lock(&sem->lock); |
79761c66 IT |
326 | while (sem->count == 0) { |
327 | rc = pthread_cond_wait(&sem->cond, &sem->lock); | |
328 | if (rc != 0) { | |
329 | error_exit(rc, __func__); | |
330 | } | |
c166cb72 | 331 | } |
79761c66 | 332 | --sem->count; |
c166cb72 PB |
333 | pthread_mutex_unlock(&sem->lock); |
334 | #else | |
38b14db3 PB |
335 | do { |
336 | rc = sem_wait(&sem->sem); | |
337 | } while (rc == -1 && errno == EINTR); | |
338 | if (rc < 0) { | |
339 | error_exit(errno, __func__); | |
340 | } | |
c166cb72 | 341 | #endif |
38b14db3 PB |
342 | } |
343 | ||
c7c4d063 | 344 | #ifdef __linux__ |
fbcc3e50 | 345 | #include "qemu/futex.h" |
c7c4d063 | 346 | #else |
fbcc3e50 | 347 | static inline void qemu_futex_wake(QemuEvent *ev, int n) |
c7c4d063 | 348 | { |
c096358e | 349 | assert(ev->initialized); |
158ef8cb | 350 | pthread_mutex_lock(&ev->lock); |
c7c4d063 PB |
351 | if (n == 1) { |
352 | pthread_cond_signal(&ev->cond); | |
353 | } else { | |
354 | pthread_cond_broadcast(&ev->cond); | |
355 | } | |
158ef8cb | 356 | pthread_mutex_unlock(&ev->lock); |
c7c4d063 PB |
357 | } |
358 | ||
fbcc3e50 | 359 | static inline void qemu_futex_wait(QemuEvent *ev, unsigned val) |
c7c4d063 | 360 | { |
c096358e | 361 | assert(ev->initialized); |
c7c4d063 PB |
362 | pthread_mutex_lock(&ev->lock); |
363 | if (ev->value == val) { | |
364 | pthread_cond_wait(&ev->cond, &ev->lock); | |
365 | } | |
366 | pthread_mutex_unlock(&ev->lock); | |
367 | } | |
368 | #endif | |
369 | ||
370 | /* Valid transitions: | |
371 | * - free->set, when setting the event | |
fbcc3e50 | 372 | * - busy->set, when setting the event, followed by qemu_futex_wake |
c7c4d063 PB |
373 | * - set->free, when resetting the event |
374 | * - free->busy, when waiting | |
375 | * | |
376 | * set->busy does not happen (it can be observed from the outside but | |
377 | * it really is set->free->busy). | |
378 | * | |
379 | * busy->free provably cannot happen; to enforce it, the set->free transition | |
380 | * is done with an OR, which becomes a no-op if the event has concurrently | |
381 | * transitioned to free or busy. | |
382 | */ | |
383 | ||
384 | #define EV_SET 0 | |
385 | #define EV_FREE 1 | |
386 | #define EV_BUSY -1 | |
387 | ||
388 | void qemu_event_init(QemuEvent *ev, bool init) | |
389 | { | |
390 | #ifndef __linux__ | |
391 | pthread_mutex_init(&ev->lock, NULL); | |
392 | pthread_cond_init(&ev->cond, NULL); | |
393 | #endif | |
394 | ||
395 | ev->value = (init ? EV_SET : EV_FREE); | |
c096358e | 396 | ev->initialized = true; |
c7c4d063 PB |
397 | } |
398 | ||
399 | void qemu_event_destroy(QemuEvent *ev) | |
400 | { | |
c096358e FZ |
401 | assert(ev->initialized); |
402 | ev->initialized = false; | |
c7c4d063 PB |
403 | #ifndef __linux__ |
404 | pthread_mutex_destroy(&ev->lock); | |
405 | pthread_cond_destroy(&ev->cond); | |
406 | #endif | |
407 | } | |
408 | ||
409 | void qemu_event_set(QemuEvent *ev) | |
410 | { | |
374293ca PB |
411 | /* qemu_event_set has release semantics, but because it *loads* |
412 | * ev->value we need a full memory barrier here. | |
413 | */ | |
c096358e | 414 | assert(ev->initialized); |
374293ca PB |
415 | smp_mb(); |
416 | if (atomic_read(&ev->value) != EV_SET) { | |
c7c4d063 PB |
417 | if (atomic_xchg(&ev->value, EV_SET) == EV_BUSY) { |
418 | /* There were waiters, wake them up. */ | |
fbcc3e50 | 419 | qemu_futex_wake(ev, INT_MAX); |
c7c4d063 PB |
420 | } |
421 | } | |
422 | } | |
423 | ||
424 | void qemu_event_reset(QemuEvent *ev) | |
425 | { | |
374293ca PB |
426 | unsigned value; |
427 | ||
c096358e | 428 | assert(ev->initialized); |
374293ca PB |
429 | value = atomic_read(&ev->value); |
430 | smp_mb_acquire(); | |
431 | if (value == EV_SET) { | |
c7c4d063 PB |
432 | /* |
433 | * If there was a concurrent reset (or even reset+wait), | |
434 | * do nothing. Otherwise change EV_SET->EV_FREE. | |
435 | */ | |
436 | atomic_or(&ev->value, EV_FREE); | |
437 | } | |
438 | } | |
439 | ||
440 | void qemu_event_wait(QemuEvent *ev) | |
441 | { | |
442 | unsigned value; | |
443 | ||
c096358e | 444 | assert(ev->initialized); |
374293ca PB |
445 | value = atomic_read(&ev->value); |
446 | smp_mb_acquire(); | |
c7c4d063 PB |
447 | if (value != EV_SET) { |
448 | if (value == EV_FREE) { | |
449 | /* | |
450 | * Leave the event reset and tell qemu_event_set that there | |
451 | * are waiters. No need to retry, because there cannot be | |
67cc32eb | 452 | * a concurrent busy->free transition. After the CAS, the |
c7c4d063 PB |
453 | * event will be either set or busy. |
454 | */ | |
455 | if (atomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) { | |
456 | return; | |
457 | } | |
458 | } | |
fbcc3e50 | 459 | qemu_futex_wait(ev, EV_BUSY); |
c7c4d063 PB |
460 | } |
461 | } | |
462 | ||
a458774a | 463 | static __thread NotifierList thread_exit; |
ef57137f | 464 | |
a458774a PM |
465 | /* |
466 | * Note that in this implementation you can register a thread-exit | |
467 | * notifier for the main thread, but it will never be called. | |
468 | * This is OK because main thread exit can only happen when the | |
469 | * entire process is exiting, and the API allows notifiers to not | |
470 | * be called on process exit. | |
471 | */ | |
ef57137f PB |
472 | void qemu_thread_atexit_add(Notifier *notifier) |
473 | { | |
a458774a | 474 | notifier_list_add(&thread_exit, notifier); |
ef57137f PB |
475 | } |
476 | ||
477 | void qemu_thread_atexit_remove(Notifier *notifier) | |
478 | { | |
ef57137f | 479 | notifier_remove(notifier); |
ef57137f PB |
480 | } |
481 | ||
a458774a | 482 | static void qemu_thread_atexit_notify(void *arg) |
ef57137f | 483 | { |
a458774a PM |
484 | /* |
485 | * Called when non-main thread exits (via qemu_thread_exit() | |
486 | * or by returning from its start routine.) | |
487 | */ | |
488 | notifier_list_notify(&thread_exit, NULL); | |
ef57137f PB |
489 | } |
490 | ||
68a93982 | 491 | typedef struct { |
492 | void *(*start_routine)(void *); | |
493 | void *arg; | |
494 | char *name; | |
495 | } QemuThreadArgs; | |
496 | ||
497 | static void *qemu_thread_start(void *args) | |
498 | { | |
499 | QemuThreadArgs *qemu_thread_args = args; | |
500 | void *(*start_routine)(void *) = qemu_thread_args->start_routine; | |
501 | void *arg = qemu_thread_args->arg; | |
a458774a | 502 | void *r; |
68a93982 | 503 | |
479a5747 | 504 | #ifdef CONFIG_THREAD_SETNAME_BYTHREAD |
68a93982 | 505 | /* Attempt to set the threads name; note that this is for debug, so |
506 | * we're not going to fail if we can't set it. | |
507 | */ | |
d820fa5b | 508 | if (name_threads && qemu_thread_args->name) { |
479a5747 | 509 | # if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID) |
d820fa5b | 510 | pthread_setname_np(pthread_self(), qemu_thread_args->name); |
479a5747 RB |
511 | # elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID) |
512 | pthread_setname_np(qemu_thread_args->name); | |
513 | # endif | |
d820fa5b PX |
514 | } |
515 | #endif | |
68a93982 | 516 | g_free(qemu_thread_args->name); |
517 | g_free(qemu_thread_args); | |
a458774a PM |
518 | pthread_cleanup_push(qemu_thread_atexit_notify, NULL); |
519 | r = start_routine(arg); | |
520 | pthread_cleanup_pop(1); | |
521 | return r; | |
5c312079 DDAG |
522 | } |
523 | ||
4900116e | 524 | void qemu_thread_create(QemuThread *thread, const char *name, |
e5d355d1 | 525 | void *(*start_routine)(void*), |
cf218714 | 526 | void *arg, int mode) |
e5d355d1 | 527 | { |
cf218714 | 528 | sigset_t set, oldset; |
e5d355d1 | 529 | int err; |
8763046b | 530 | pthread_attr_t attr; |
d820fa5b | 531 | QemuThreadArgs *qemu_thread_args; |
e5d355d1 | 532 | |
8763046b JK |
533 | err = pthread_attr_init(&attr); |
534 | if (err) { | |
535 | error_exit(err, __func__); | |
536 | } | |
55541c8a | 537 | |
68a93982 | 538 | if (mode == QEMU_THREAD_DETACHED) { |
539 | pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
540 | } | |
541 | ||
cf218714 | 542 | /* Leave signal handling to the iothread. */ |
55541c8a | 543 | sigfillset(&set); |
21a43af0 RB |
544 | /* Blocking the signals can result in undefined behaviour. */ |
545 | sigdelset(&set, SIGSEGV); | |
546 | sigdelset(&set, SIGFPE); | |
547 | sigdelset(&set, SIGILL); | |
548 | /* TODO avoid SIGBUS loss on macOS */ | |
55541c8a | 549 | pthread_sigmask(SIG_SETMASK, &set, &oldset); |
55541c8a | 550 | |
d820fa5b PX |
551 | qemu_thread_args = g_new0(QemuThreadArgs, 1); |
552 | qemu_thread_args->name = g_strdup(name); | |
553 | qemu_thread_args->start_routine = start_routine; | |
554 | qemu_thread_args->arg = arg; | |
555 | ||
556 | err = pthread_create(&thread->thread, &attr, | |
557 | qemu_thread_start, qemu_thread_args); | |
4900116e | 558 | |
68a93982 | 559 | if (err) |
560 | error_exit(err, __func__); | |
561 | ||
55541c8a | 562 | pthread_sigmask(SIG_SETMASK, &oldset, NULL); |
8763046b JK |
563 | |
564 | pthread_attr_destroy(&attr); | |
e5d355d1 AL |
565 | } |
566 | ||
b7680cb6 | 567 | void qemu_thread_get_self(QemuThread *thread) |
e5d355d1 AL |
568 | { |
569 | thread->thread = pthread_self(); | |
570 | } | |
571 | ||
2d797b65 | 572 | bool qemu_thread_is_self(QemuThread *thread) |
e5d355d1 | 573 | { |
b7680cb6 | 574 | return pthread_equal(pthread_self(), thread->thread); |
e5d355d1 AL |
575 | } |
576 | ||
313b1d69 CC |
577 | void qemu_thread_exit(void *retval) |
578 | { | |
579 | pthread_exit(retval); | |
580 | } | |
8763046b JK |
581 | |
582 | void *qemu_thread_join(QemuThread *thread) | |
583 | { | |
584 | int err; | |
585 | void *ret; | |
586 | ||
587 | err = pthread_join(thread->thread, &ret); | |
588 | if (err) { | |
589 | error_exit(err, __func__); | |
590 | } | |
591 | return ret; | |
592 | } |