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Commit | Line | Data |
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c7017ecc | 1 | /* |
6539a0af | 2 | * Threading primitives for CUPS. |
c7017ecc | 3 | * |
b908d72c | 4 | * Copyright 2009-2017 by Apple Inc. |
c7017ecc | 5 | * |
e3101897 | 6 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. |
c7017ecc MS |
7 | */ |
8 | ||
9 | /* | |
10 | * Include necessary headers... | |
11 | */ | |
12 | ||
13 | #include "cups-private.h" | |
14 | #include "thread-private.h" | |
15 | ||
16 | ||
17 | #if defined(HAVE_PTHREAD_H) | |
ad7daa25 MS |
18 | /* |
19 | * '_cupsCondBroadcast()' - Wake up waiting threads. | |
20 | */ | |
21 | ||
22 | void | |
23 | _cupsCondBroadcast(_cups_cond_t *cond) /* I - Condition */ | |
24 | { | |
25 | pthread_cond_broadcast(cond); | |
26 | } | |
27 | ||
28 | ||
29 | /* | |
30 | * '_cupsCondInit()' - Initialize a condition variable. | |
31 | */ | |
32 | ||
33 | void | |
34 | _cupsCondInit(_cups_cond_t *cond) /* I - Condition */ | |
35 | { | |
36 | pthread_cond_init(cond, NULL); | |
37 | } | |
38 | ||
39 | ||
40 | /* | |
41 | * '_cupsCondWait()' - Wait for a condition with optional timeout. | |
42 | */ | |
43 | ||
44 | void | |
45 | _cupsCondWait(_cups_cond_t *cond, /* I - Condition */ | |
46 | _cups_mutex_t *mutex, /* I - Mutex */ | |
47 | double timeout) /* I - Timeout in seconds (0 or negative for none) */ | |
48 | { | |
49 | if (timeout > 0.0) | |
50 | { | |
51 | struct timespec abstime; /* Timeout */ | |
52 | ||
53 | abstime.tv_sec = (long)timeout; | |
54 | abstime.tv_nsec = (long)(1000000000 * (timeout - (long)timeout)); | |
55 | ||
56 | pthread_cond_timedwait(cond, mutex, &abstime); | |
57 | } | |
58 | else | |
59 | pthread_cond_wait(cond, mutex); | |
60 | } | |
61 | ||
62 | ||
1106b00e MS |
63 | /* |
64 | * '_cupsMutexInit()' - Initialize a mutex. | |
65 | */ | |
66 | ||
67 | void | |
68 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
69 | { | |
70 | pthread_mutex_init(mutex, NULL); | |
71 | } | |
72 | ||
73 | ||
c7017ecc MS |
74 | /* |
75 | * '_cupsMutexLock()' - Lock a mutex. | |
76 | */ | |
77 | ||
78 | void | |
79 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
80 | { | |
81 | pthread_mutex_lock(mutex); | |
82 | } | |
83 | ||
84 | ||
85 | /* | |
86 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
87 | */ | |
88 | ||
89 | void | |
90 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
91 | { | |
92 | pthread_mutex_unlock(mutex); | |
93 | } | |
94 | ||
95 | ||
1106b00e MS |
96 | /* |
97 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
98 | */ | |
99 | ||
100 | void | |
101 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
102 | { | |
103 | pthread_rwlock_init(rwlock, NULL); | |
104 | } | |
105 | ||
106 | ||
107 | /* | |
108 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
109 | */ | |
110 | ||
111 | void | |
112 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
113 | { | |
114 | pthread_rwlock_rdlock(rwlock); | |
115 | } | |
116 | ||
117 | ||
118 | /* | |
119 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
120 | */ | |
121 | ||
122 | void | |
123 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
124 | { | |
125 | pthread_rwlock_wrlock(rwlock); | |
126 | } | |
127 | ||
128 | ||
129 | /* | |
130 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
131 | */ | |
132 | ||
133 | void | |
134 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
135 | { | |
136 | pthread_rwlock_unlock(rwlock); | |
137 | } | |
138 | ||
139 | ||
ad7daa25 MS |
140 | /* |
141 | * '_cupsThreadCancel()' - Cancel (kill) a thread. | |
142 | */ | |
143 | ||
144 | void | |
145 | _cupsThreadCancel(_cups_thread_t thread)/* I - Thread ID */ | |
146 | { | |
147 | pthread_cancel(thread); | |
148 | } | |
149 | ||
150 | ||
c7017ecc MS |
151 | /* |
152 | * '_cupsThreadCreate()' - Create a thread. | |
153 | */ | |
154 | ||
ad7daa25 | 155 | _cups_thread_t /* O - Thread ID */ |
c7017ecc MS |
156 | _cupsThreadCreate( |
157 | _cups_thread_func_t func, /* I - Entry point */ | |
158 | void *arg) /* I - Entry point context */ | |
159 | { | |
160 | pthread_t thread; | |
161 | ||
ad7daa25 MS |
162 | if (pthread_create(&thread, NULL, (void *(*)(void *))func, arg)) |
163 | return (0); | |
164 | else | |
165 | return (thread); | |
166 | } | |
167 | ||
168 | ||
b908d72c MS |
169 | /* |
170 | * '_cupsThreadDetach()' - Tell the OS that the thread is running independently. | |
171 | */ | |
172 | ||
173 | void | |
174 | _cupsThreadDetach(_cups_thread_t thread)/* I - Thread ID */ | |
175 | { | |
176 | pthread_detach(thread); | |
177 | } | |
178 | ||
179 | ||
ad7daa25 MS |
180 | /* |
181 | * '_cupsThreadWait()' - Wait for a thread to exit. | |
182 | */ | |
183 | ||
184 | void * /* O - Return value */ | |
185 | _cupsThreadWait(_cups_thread_t thread) /* I - Thread ID */ | |
186 | { | |
187 | void *ret; /* Return value */ | |
188 | ||
189 | ||
190 | if (pthread_join(thread, &ret)) | |
191 | return (NULL); | |
192 | else | |
193 | return (ret); | |
c7017ecc MS |
194 | } |
195 | ||
196 | ||
197 | #elif defined(WIN32) | |
198 | # include <process.h> | |
199 | ||
200 | ||
aa747d18 MS |
201 | /* |
202 | * '_cupsCondBroadcast()' - Wake up waiting threads. | |
203 | */ | |
204 | ||
205 | void | |
206 | _cupsCondBroadcast(_cups_cond_t *cond) /* I - Condition */ | |
207 | { | |
208 | // TODO: Implement me | |
209 | } | |
210 | ||
211 | ||
212 | /* | |
213 | * '_cupsCondInit()' - Initialize a condition variable. | |
214 | */ | |
215 | ||
216 | void | |
217 | _cupsCondInit(_cups_cond_t *cond) /* I - Condition */ | |
218 | { | |
219 | // TODO: Implement me | |
220 | } | |
221 | ||
222 | ||
223 | /* | |
224 | * '_cupsCondWait()' - Wait for a condition with optional timeout. | |
225 | */ | |
226 | ||
227 | void | |
228 | _cupsCondWait(_cups_cond_t *cond, /* I - Condition */ | |
229 | _cups_mutex_t *mutex, /* I - Mutex */ | |
230 | double timeout) /* I - Timeout in seconds (0 or negative for none) */ | |
231 | { | |
232 | // TODO: Implement me | |
233 | } | |
234 | ||
235 | ||
1106b00e MS |
236 | /* |
237 | * '_cupsMutexInit()' - Initialize a mutex. | |
238 | */ | |
239 | ||
240 | void | |
241 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
242 | { | |
243 | InitializeCriticalSection(&mutex->m_criticalSection); | |
244 | mutex->m_init = 1; | |
245 | } | |
246 | ||
247 | ||
c7017ecc MS |
248 | /* |
249 | * '_cupsMutexLock()' - Lock a mutex. | |
250 | */ | |
251 | ||
252 | void | |
253 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
254 | { | |
255 | if (!mutex->m_init) | |
256 | { | |
257 | _cupsGlobalLock(); | |
258 | ||
259 | if (!mutex->m_init) | |
260 | { | |
261 | InitializeCriticalSection(&mutex->m_criticalSection); | |
262 | mutex->m_init = 1; | |
263 | } | |
264 | ||
265 | _cupsGlobalUnlock(); | |
266 | } | |
267 | ||
268 | EnterCriticalSection(&mutex->m_criticalSection); | |
269 | } | |
270 | ||
271 | ||
272 | /* | |
273 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
274 | */ | |
275 | ||
276 | void | |
277 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
278 | { | |
279 | LeaveCriticalSection(&mutex->m_criticalSection); | |
280 | } | |
281 | ||
282 | ||
1106b00e MS |
283 | /* |
284 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
285 | */ | |
286 | ||
287 | void | |
288 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
289 | { | |
290 | _cupsMutexInit((_cups_mutex_t *)rwlock); | |
291 | } | |
292 | ||
293 | ||
294 | /* | |
295 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
296 | */ | |
297 | ||
298 | void | |
299 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
300 | { | |
301 | _cupsMutexLock((_cups_mutex_t *)rwlock); | |
302 | } | |
303 | ||
304 | ||
305 | /* | |
306 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
307 | */ | |
308 | ||
309 | void | |
310 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
311 | { | |
312 | _cupsMutexLock((_cups_mutex_t *)rwlock); | |
313 | } | |
314 | ||
315 | ||
316 | /* | |
317 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
318 | */ | |
319 | ||
320 | void | |
321 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
322 | { | |
323 | _cupsMutexUnlock((_cups_mutex_t *)rwlock); | |
324 | } | |
325 | ||
326 | ||
ad7daa25 MS |
327 | /* |
328 | * '_cupsThreadCancel()' - Cancel (kill) a thread. | |
329 | */ | |
330 | ||
331 | void | |
332 | _cupsThreadCancel(_cups_thread_t thread)/* I - Thread ID */ | |
333 | { | |
334 | // TODO: Implement me | |
335 | } | |
336 | ||
337 | ||
c7017ecc MS |
338 | /* |
339 | * '_cupsThreadCreate()' - Create a thread. | |
340 | */ | |
341 | ||
ad7daa25 | 342 | _cups_thread_t /* O - Thread ID */ |
c7017ecc MS |
343 | _cupsThreadCreate( |
344 | _cups_thread_func_t func, /* I - Entry point */ | |
345 | void *arg) /* I - Entry point context */ | |
346 | { | |
ad7daa25 MS |
347 | return (_beginthreadex(NULL, 0, (LPTHREAD_START_ROUTINE)func, arg, 0, NULL)); |
348 | } | |
349 | ||
350 | ||
2d947886 MS |
351 | /* |
352 | * '_cupsThreadDetach()' - Tell the OS that the thread is running independently. | |
353 | */ | |
354 | ||
355 | void | |
356 | _cupsThreadDetach(_cups_thread_t thread)/* I - Thread ID */ | |
357 | { | |
358 | // TODO: Implement me | |
359 | (void)thread; | |
360 | } | |
361 | ||
362 | ||
ad7daa25 MS |
363 | /* |
364 | * '_cupsThreadWait()' - Wait for a thread to exit. | |
365 | */ | |
366 | ||
367 | void * /* O - Return value */ | |
368 | _cupsThreadWait(_cups_thread_t thread) /* I - Thread ID */ | |
369 | { | |
370 | // TODO: Implement me | |
26598dba MS |
371 | (void)thread; |
372 | ||
373 | return (NULL); | |
c7017ecc MS |
374 | } |
375 | ||
376 | ||
aa747d18 MS |
377 | #else /* No threading */ |
378 | /* | |
379 | * '_cupsCondBroadcast()' - Wake up waiting threads. | |
380 | */ | |
381 | ||
382 | void | |
383 | _cupsCondBroadcast(_cups_cond_t *cond) /* I - Condition */ | |
384 | { | |
385 | // TODO: Implement me | |
386 | } | |
387 | ||
388 | ||
389 | /* | |
390 | * '_cupsCondInit()' - Initialize a condition variable. | |
391 | */ | |
392 | ||
393 | void | |
394 | _cupsCondInit(_cups_cond_t *cond) /* I - Condition */ | |
395 | { | |
396 | // TODO: Implement me | |
397 | } | |
398 | ||
399 | ||
400 | /* | |
401 | * '_cupsCondWait()' - Wait for a condition with optional timeout. | |
402 | */ | |
403 | ||
404 | void | |
405 | _cupsCondWait(_cups_cond_t *cond, /* I - Condition */ | |
406 | _cups_mutex_t *mutex, /* I - Mutex */ | |
407 | double timeout) /* I - Timeout in seconds (0 or negative for none) */ | |
408 | { | |
409 | // TODO: Implement me | |
410 | } | |
411 | ||
412 | ||
1106b00e MS |
413 | /* |
414 | * '_cupsMutexInit()' - Initialize a mutex. | |
415 | */ | |
416 | ||
417 | void | |
418 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
419 | { | |
420 | (void)mutex; | |
421 | } | |
422 | ||
423 | ||
c7017ecc MS |
424 | /* |
425 | * '_cupsMutexLock()' - Lock a mutex. | |
426 | */ | |
427 | ||
428 | void | |
429 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
430 | { | |
1106b00e | 431 | (void)mutex; |
c7017ecc MS |
432 | } |
433 | ||
434 | ||
435 | /* | |
436 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
437 | */ | |
438 | ||
439 | void | |
440 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
441 | { | |
1106b00e MS |
442 | (void)mutex; |
443 | } | |
444 | ||
445 | ||
446 | /* | |
447 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
448 | */ | |
449 | ||
450 | void | |
451 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
452 | { | |
453 | (void)rwlock; | |
454 | } | |
455 | ||
456 | ||
457 | /* | |
458 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
459 | */ | |
460 | ||
461 | void | |
462 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
463 | { | |
464 | (void)rwlock; | |
465 | } | |
466 | ||
467 | ||
468 | /* | |
469 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
470 | */ | |
471 | ||
472 | void | |
473 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
474 | { | |
475 | (void)rwlock; | |
476 | } | |
477 | ||
478 | ||
479 | /* | |
480 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
481 | */ | |
482 | ||
483 | void | |
484 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
485 | { | |
486 | (void)rwlock; | |
c7017ecc | 487 | } |
f3c17241 MS |
488 | |
489 | ||
ad7daa25 MS |
490 | /* |
491 | * '_cupsThreadCancel()' - Cancel (kill) a thread. | |
492 | */ | |
493 | ||
494 | void | |
495 | _cupsThreadCancel(_cups_thread_t thread)/* I - Thread ID */ | |
496 | { | |
497 | (void)thread; | |
498 | } | |
499 | ||
500 | ||
f3c17241 MS |
501 | /* |
502 | * '_cupsThreadCreate()' - Create a thread. | |
503 | */ | |
504 | ||
ad7daa25 | 505 | _cups_thread_t /* O - Thread ID */ |
f3c17241 MS |
506 | _cupsThreadCreate( |
507 | _cups_thread_func_t func, /* I - Entry point */ | |
508 | void *arg) /* I - Entry point context */ | |
509 | { | |
4d8e89a6 | 510 | fputs("DEBUG: CUPS was compiled without threading support, no thread created.\n", stderr); |
f3c17241 MS |
511 | |
512 | (void)func; | |
513 | (void)arg; | |
514 | ||
515 | return (0); | |
516 | } | |
ad7daa25 MS |
517 | |
518 | ||
4d8e89a6 MS |
519 | /* |
520 | * '_cupsThreadDetach()' - Tell the OS that the thread is running independently. | |
521 | */ | |
522 | ||
523 | void | |
524 | _cupsThreadDetach(_cups_thread_t thread)/* I - Thread ID */ | |
525 | { | |
526 | (void)thread; | |
527 | } | |
528 | ||
529 | ||
ad7daa25 MS |
530 | /* |
531 | * '_cupsThreadWait()' - Wait for a thread to exit. | |
532 | */ | |
533 | ||
534 | void * /* O - Return value */ | |
535 | _cupsThreadWait(_cups_thread_t thread) /* I - Thread ID */ | |
536 | { | |
537 | (void)thread; | |
538 | ||
539 | return (NULL); | |
540 | } | |
541 | ||
c7017ecc | 542 | #endif /* HAVE_PTHREAD_H */ |