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Commit | Line | Data |
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c7017ecc | 1 | /* |
6539a0af | 2 | * Threading primitives for CUPS. |
c7017ecc | 3 | * |
13ceaad2 | 4 | * Copyright © 2009-2018 by Apple Inc. |
c7017ecc | 5 | * |
13ceaad2 MS |
6 | * Licensed under Apache License v2.0. See the file "LICENSE" for more |
7 | * information. | |
c7017ecc MS |
8 | */ |
9 | ||
10 | /* | |
11 | * Include necessary headers... | |
12 | */ | |
13 | ||
14 | #include "cups-private.h" | |
15 | #include "thread-private.h" | |
16 | ||
17 | ||
18 | #if defined(HAVE_PTHREAD_H) | |
ad7daa25 MS |
19 | /* |
20 | * '_cupsCondBroadcast()' - Wake up waiting threads. | |
21 | */ | |
22 | ||
23 | void | |
24 | _cupsCondBroadcast(_cups_cond_t *cond) /* I - Condition */ | |
25 | { | |
26 | pthread_cond_broadcast(cond); | |
27 | } | |
28 | ||
29 | ||
30 | /* | |
31 | * '_cupsCondInit()' - Initialize a condition variable. | |
32 | */ | |
33 | ||
34 | void | |
35 | _cupsCondInit(_cups_cond_t *cond) /* I - Condition */ | |
36 | { | |
37 | pthread_cond_init(cond, NULL); | |
38 | } | |
39 | ||
40 | ||
41 | /* | |
42 | * '_cupsCondWait()' - Wait for a condition with optional timeout. | |
43 | */ | |
44 | ||
45 | void | |
46 | _cupsCondWait(_cups_cond_t *cond, /* I - Condition */ | |
47 | _cups_mutex_t *mutex, /* I - Mutex */ | |
48 | double timeout) /* I - Timeout in seconds (0 or negative for none) */ | |
49 | { | |
50 | if (timeout > 0.0) | |
51 | { | |
52 | struct timespec abstime; /* Timeout */ | |
53 | ||
84047a01 | 54 | clock_gettime(CLOCK_REALTIME, &abstime); |
13ceaad2 | 55 | |
84047a01 MS |
56 | abstime.tv_sec += (long)timeout; |
57 | abstime.tv_nsec += (long)(1000000000 * (timeout - (long)timeout)); | |
13ceaad2 MS |
58 | |
59 | while (abstime.tv_nsec >= 1000000000) | |
60 | { | |
61 | abstime.tv_nsec -= 1000000000; | |
62 | abstime.tv_sec ++; | |
63 | }; | |
ad7daa25 MS |
64 | |
65 | pthread_cond_timedwait(cond, mutex, &abstime); | |
66 | } | |
67 | else | |
68 | pthread_cond_wait(cond, mutex); | |
69 | } | |
70 | ||
71 | ||
1106b00e MS |
72 | /* |
73 | * '_cupsMutexInit()' - Initialize a mutex. | |
74 | */ | |
75 | ||
76 | void | |
77 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
78 | { | |
79 | pthread_mutex_init(mutex, NULL); | |
80 | } | |
81 | ||
82 | ||
c7017ecc MS |
83 | /* |
84 | * '_cupsMutexLock()' - Lock a mutex. | |
85 | */ | |
86 | ||
87 | void | |
88 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
89 | { | |
90 | pthread_mutex_lock(mutex); | |
91 | } | |
92 | ||
93 | ||
94 | /* | |
95 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
96 | */ | |
97 | ||
98 | void | |
99 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
100 | { | |
101 | pthread_mutex_unlock(mutex); | |
102 | } | |
103 | ||
104 | ||
1106b00e MS |
105 | /* |
106 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
107 | */ | |
108 | ||
109 | void | |
110 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
111 | { | |
112 | pthread_rwlock_init(rwlock, NULL); | |
113 | } | |
114 | ||
115 | ||
116 | /* | |
117 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
118 | */ | |
119 | ||
120 | void | |
121 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
122 | { | |
123 | pthread_rwlock_rdlock(rwlock); | |
124 | } | |
125 | ||
126 | ||
127 | /* | |
128 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
129 | */ | |
130 | ||
131 | void | |
132 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
133 | { | |
134 | pthread_rwlock_wrlock(rwlock); | |
135 | } | |
136 | ||
137 | ||
138 | /* | |
139 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
140 | */ | |
141 | ||
142 | void | |
143 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
144 | { | |
145 | pthread_rwlock_unlock(rwlock); | |
146 | } | |
147 | ||
148 | ||
ad7daa25 MS |
149 | /* |
150 | * '_cupsThreadCancel()' - Cancel (kill) a thread. | |
151 | */ | |
152 | ||
153 | void | |
154 | _cupsThreadCancel(_cups_thread_t thread)/* I - Thread ID */ | |
155 | { | |
156 | pthread_cancel(thread); | |
157 | } | |
158 | ||
159 | ||
c7017ecc MS |
160 | /* |
161 | * '_cupsThreadCreate()' - Create a thread. | |
162 | */ | |
163 | ||
ad7daa25 | 164 | _cups_thread_t /* O - Thread ID */ |
c7017ecc MS |
165 | _cupsThreadCreate( |
166 | _cups_thread_func_t func, /* I - Entry point */ | |
167 | void *arg) /* I - Entry point context */ | |
168 | { | |
169 | pthread_t thread; | |
170 | ||
ad7daa25 MS |
171 | if (pthread_create(&thread, NULL, (void *(*)(void *))func, arg)) |
172 | return (0); | |
173 | else | |
174 | return (thread); | |
175 | } | |
176 | ||
177 | ||
b908d72c MS |
178 | /* |
179 | * '_cupsThreadDetach()' - Tell the OS that the thread is running independently. | |
180 | */ | |
181 | ||
182 | void | |
183 | _cupsThreadDetach(_cups_thread_t thread)/* I - Thread ID */ | |
184 | { | |
185 | pthread_detach(thread); | |
186 | } | |
187 | ||
188 | ||
ad7daa25 MS |
189 | /* |
190 | * '_cupsThreadWait()' - Wait for a thread to exit. | |
191 | */ | |
192 | ||
193 | void * /* O - Return value */ | |
194 | _cupsThreadWait(_cups_thread_t thread) /* I - Thread ID */ | |
195 | { | |
196 | void *ret; /* Return value */ | |
197 | ||
198 | ||
199 | if (pthread_join(thread, &ret)) | |
200 | return (NULL); | |
201 | else | |
202 | return (ret); | |
c7017ecc MS |
203 | } |
204 | ||
205 | ||
206 | #elif defined(WIN32) | |
207 | # include <process.h> | |
208 | ||
209 | ||
aa747d18 MS |
210 | /* |
211 | * '_cupsCondBroadcast()' - Wake up waiting threads. | |
212 | */ | |
213 | ||
214 | void | |
215 | _cupsCondBroadcast(_cups_cond_t *cond) /* I - Condition */ | |
216 | { | |
217 | // TODO: Implement me | |
218 | } | |
219 | ||
220 | ||
221 | /* | |
222 | * '_cupsCondInit()' - Initialize a condition variable. | |
223 | */ | |
224 | ||
225 | void | |
226 | _cupsCondInit(_cups_cond_t *cond) /* I - Condition */ | |
227 | { | |
228 | // TODO: Implement me | |
229 | } | |
230 | ||
231 | ||
232 | /* | |
233 | * '_cupsCondWait()' - Wait for a condition with optional timeout. | |
234 | */ | |
235 | ||
236 | void | |
237 | _cupsCondWait(_cups_cond_t *cond, /* I - Condition */ | |
238 | _cups_mutex_t *mutex, /* I - Mutex */ | |
239 | double timeout) /* I - Timeout in seconds (0 or negative for none) */ | |
240 | { | |
241 | // TODO: Implement me | |
242 | } | |
243 | ||
244 | ||
1106b00e MS |
245 | /* |
246 | * '_cupsMutexInit()' - Initialize a mutex. | |
247 | */ | |
248 | ||
249 | void | |
250 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
251 | { | |
252 | InitializeCriticalSection(&mutex->m_criticalSection); | |
253 | mutex->m_init = 1; | |
254 | } | |
255 | ||
256 | ||
c7017ecc MS |
257 | /* |
258 | * '_cupsMutexLock()' - Lock a mutex. | |
259 | */ | |
260 | ||
261 | void | |
262 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
263 | { | |
264 | if (!mutex->m_init) | |
265 | { | |
266 | _cupsGlobalLock(); | |
267 | ||
268 | if (!mutex->m_init) | |
269 | { | |
270 | InitializeCriticalSection(&mutex->m_criticalSection); | |
271 | mutex->m_init = 1; | |
272 | } | |
273 | ||
274 | _cupsGlobalUnlock(); | |
275 | } | |
276 | ||
277 | EnterCriticalSection(&mutex->m_criticalSection); | |
278 | } | |
279 | ||
280 | ||
281 | /* | |
282 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
283 | */ | |
284 | ||
285 | void | |
286 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
287 | { | |
288 | LeaveCriticalSection(&mutex->m_criticalSection); | |
289 | } | |
290 | ||
291 | ||
1106b00e MS |
292 | /* |
293 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
294 | */ | |
295 | ||
296 | void | |
297 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
298 | { | |
299 | _cupsMutexInit((_cups_mutex_t *)rwlock); | |
300 | } | |
301 | ||
302 | ||
303 | /* | |
304 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
305 | */ | |
306 | ||
307 | void | |
308 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
309 | { | |
310 | _cupsMutexLock((_cups_mutex_t *)rwlock); | |
311 | } | |
312 | ||
313 | ||
314 | /* | |
315 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
316 | */ | |
317 | ||
318 | void | |
319 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
320 | { | |
321 | _cupsMutexLock((_cups_mutex_t *)rwlock); | |
322 | } | |
323 | ||
324 | ||
325 | /* | |
326 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
327 | */ | |
328 | ||
329 | void | |
330 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
331 | { | |
332 | _cupsMutexUnlock((_cups_mutex_t *)rwlock); | |
333 | } | |
334 | ||
335 | ||
ad7daa25 MS |
336 | /* |
337 | * '_cupsThreadCancel()' - Cancel (kill) a thread. | |
338 | */ | |
339 | ||
340 | void | |
341 | _cupsThreadCancel(_cups_thread_t thread)/* I - Thread ID */ | |
342 | { | |
343 | // TODO: Implement me | |
344 | } | |
345 | ||
346 | ||
c7017ecc MS |
347 | /* |
348 | * '_cupsThreadCreate()' - Create a thread. | |
349 | */ | |
350 | ||
ad7daa25 | 351 | _cups_thread_t /* O - Thread ID */ |
c7017ecc MS |
352 | _cupsThreadCreate( |
353 | _cups_thread_func_t func, /* I - Entry point */ | |
354 | void *arg) /* I - Entry point context */ | |
355 | { | |
ad7daa25 MS |
356 | return (_beginthreadex(NULL, 0, (LPTHREAD_START_ROUTINE)func, arg, 0, NULL)); |
357 | } | |
358 | ||
359 | ||
2d947886 MS |
360 | /* |
361 | * '_cupsThreadDetach()' - Tell the OS that the thread is running independently. | |
362 | */ | |
363 | ||
364 | void | |
365 | _cupsThreadDetach(_cups_thread_t thread)/* I - Thread ID */ | |
366 | { | |
367 | // TODO: Implement me | |
368 | (void)thread; | |
369 | } | |
370 | ||
371 | ||
ad7daa25 MS |
372 | /* |
373 | * '_cupsThreadWait()' - Wait for a thread to exit. | |
374 | */ | |
375 | ||
376 | void * /* O - Return value */ | |
377 | _cupsThreadWait(_cups_thread_t thread) /* I - Thread ID */ | |
378 | { | |
379 | // TODO: Implement me | |
26598dba MS |
380 | (void)thread; |
381 | ||
382 | return (NULL); | |
c7017ecc MS |
383 | } |
384 | ||
385 | ||
aa747d18 MS |
386 | #else /* No threading */ |
387 | /* | |
388 | * '_cupsCondBroadcast()' - Wake up waiting threads. | |
389 | */ | |
390 | ||
391 | void | |
392 | _cupsCondBroadcast(_cups_cond_t *cond) /* I - Condition */ | |
393 | { | |
394 | // TODO: Implement me | |
395 | } | |
396 | ||
397 | ||
398 | /* | |
399 | * '_cupsCondInit()' - Initialize a condition variable. | |
400 | */ | |
401 | ||
402 | void | |
403 | _cupsCondInit(_cups_cond_t *cond) /* I - Condition */ | |
404 | { | |
405 | // TODO: Implement me | |
406 | } | |
407 | ||
408 | ||
409 | /* | |
410 | * '_cupsCondWait()' - Wait for a condition with optional timeout. | |
411 | */ | |
412 | ||
413 | void | |
414 | _cupsCondWait(_cups_cond_t *cond, /* I - Condition */ | |
415 | _cups_mutex_t *mutex, /* I - Mutex */ | |
416 | double timeout) /* I - Timeout in seconds (0 or negative for none) */ | |
417 | { | |
418 | // TODO: Implement me | |
419 | } | |
420 | ||
421 | ||
1106b00e MS |
422 | /* |
423 | * '_cupsMutexInit()' - Initialize a mutex. | |
424 | */ | |
425 | ||
426 | void | |
427 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
428 | { | |
429 | (void)mutex; | |
430 | } | |
431 | ||
432 | ||
c7017ecc MS |
433 | /* |
434 | * '_cupsMutexLock()' - Lock a mutex. | |
435 | */ | |
436 | ||
437 | void | |
438 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
439 | { | |
1106b00e | 440 | (void)mutex; |
c7017ecc MS |
441 | } |
442 | ||
443 | ||
444 | /* | |
445 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
446 | */ | |
447 | ||
448 | void | |
449 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
450 | { | |
1106b00e MS |
451 | (void)mutex; |
452 | } | |
453 | ||
454 | ||
455 | /* | |
456 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
457 | */ | |
458 | ||
459 | void | |
460 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
461 | { | |
462 | (void)rwlock; | |
463 | } | |
464 | ||
465 | ||
466 | /* | |
467 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
468 | */ | |
469 | ||
470 | void | |
471 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
472 | { | |
473 | (void)rwlock; | |
474 | } | |
475 | ||
476 | ||
477 | /* | |
478 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
479 | */ | |
480 | ||
481 | void | |
482 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
483 | { | |
484 | (void)rwlock; | |
485 | } | |
486 | ||
487 | ||
488 | /* | |
489 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
490 | */ | |
491 | ||
492 | void | |
493 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
494 | { | |
495 | (void)rwlock; | |
c7017ecc | 496 | } |
f3c17241 MS |
497 | |
498 | ||
ad7daa25 MS |
499 | /* |
500 | * '_cupsThreadCancel()' - Cancel (kill) a thread. | |
501 | */ | |
502 | ||
503 | void | |
504 | _cupsThreadCancel(_cups_thread_t thread)/* I - Thread ID */ | |
505 | { | |
506 | (void)thread; | |
507 | } | |
508 | ||
509 | ||
f3c17241 MS |
510 | /* |
511 | * '_cupsThreadCreate()' - Create a thread. | |
512 | */ | |
513 | ||
ad7daa25 | 514 | _cups_thread_t /* O - Thread ID */ |
f3c17241 MS |
515 | _cupsThreadCreate( |
516 | _cups_thread_func_t func, /* I - Entry point */ | |
517 | void *arg) /* I - Entry point context */ | |
518 | { | |
4d8e89a6 | 519 | fputs("DEBUG: CUPS was compiled without threading support, no thread created.\n", stderr); |
f3c17241 MS |
520 | |
521 | (void)func; | |
522 | (void)arg; | |
523 | ||
524 | return (0); | |
525 | } | |
ad7daa25 MS |
526 | |
527 | ||
4d8e89a6 MS |
528 | /* |
529 | * '_cupsThreadDetach()' - Tell the OS that the thread is running independently. | |
530 | */ | |
531 | ||
532 | void | |
533 | _cupsThreadDetach(_cups_thread_t thread)/* I - Thread ID */ | |
534 | { | |
535 | (void)thread; | |
536 | } | |
537 | ||
538 | ||
ad7daa25 MS |
539 | /* |
540 | * '_cupsThreadWait()' - Wait for a thread to exit. | |
541 | */ | |
542 | ||
543 | void * /* O - Return value */ | |
544 | _cupsThreadWait(_cups_thread_t thread) /* I - Thread ID */ | |
545 | { | |
546 | (void)thread; | |
547 | ||
548 | return (NULL); | |
549 | } | |
550 | ||
c7017ecc | 551 | #endif /* HAVE_PTHREAD_H */ |