]>
Commit | Line | Data |
---|---|---|
c7017ecc MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
6539a0af | 4 | * Threading primitives for CUPS. |
c7017ecc | 5 | * |
6539a0af | 6 | * Copyright 2009-2014 by Apple Inc. |
c7017ecc | 7 | * |
6539a0af MS |
8 | * These coded instructions, statements, and computer programs are the |
9 | * property of Apple Inc. and are protected by Federal copyright | |
10 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
11 | * which should have been included with this file. If this file is | |
12 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
c7017ecc | 13 | * |
6539a0af | 14 | * This file is subject to the Apple OS-Developed Software exception. |
c7017ecc MS |
15 | */ |
16 | ||
17 | /* | |
18 | * Include necessary headers... | |
19 | */ | |
20 | ||
21 | #include "cups-private.h" | |
22 | #include "thread-private.h" | |
23 | ||
24 | ||
25 | #if defined(HAVE_PTHREAD_H) | |
1106b00e MS |
26 | /* |
27 | * '_cupsMutexInit()' - Initialize a mutex. | |
28 | */ | |
29 | ||
30 | void | |
31 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
32 | { | |
33 | pthread_mutex_init(mutex, NULL); | |
34 | } | |
35 | ||
36 | ||
c7017ecc MS |
37 | /* |
38 | * '_cupsMutexLock()' - Lock a mutex. | |
39 | */ | |
40 | ||
41 | void | |
42 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
43 | { | |
44 | pthread_mutex_lock(mutex); | |
45 | } | |
46 | ||
47 | ||
48 | /* | |
49 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
50 | */ | |
51 | ||
52 | void | |
53 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
54 | { | |
55 | pthread_mutex_unlock(mutex); | |
56 | } | |
57 | ||
58 | ||
1106b00e MS |
59 | /* |
60 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
61 | */ | |
62 | ||
63 | void | |
64 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
65 | { | |
66 | pthread_rwlock_init(rwlock, NULL); | |
67 | } | |
68 | ||
69 | ||
70 | /* | |
71 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
72 | */ | |
73 | ||
74 | void | |
75 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
76 | { | |
77 | pthread_rwlock_rdlock(rwlock); | |
78 | } | |
79 | ||
80 | ||
81 | /* | |
82 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
83 | */ | |
84 | ||
85 | void | |
86 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
87 | { | |
88 | pthread_rwlock_wrlock(rwlock); | |
89 | } | |
90 | ||
91 | ||
92 | /* | |
93 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
94 | */ | |
95 | ||
96 | void | |
97 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
98 | { | |
99 | pthread_rwlock_unlock(rwlock); | |
100 | } | |
101 | ||
102 | ||
c7017ecc MS |
103 | /* |
104 | * '_cupsThreadCreate()' - Create a thread. | |
105 | */ | |
106 | ||
f3c17241 | 107 | int /* O - 0 on failure, 1 on success */ |
c7017ecc MS |
108 | _cupsThreadCreate( |
109 | _cups_thread_func_t func, /* I - Entry point */ | |
110 | void *arg) /* I - Entry point context */ | |
111 | { | |
112 | pthread_t thread; | |
113 | ||
114 | return (pthread_create(&thread, NULL, (void *(*)(void *))func, arg) == 0); | |
115 | } | |
116 | ||
117 | ||
118 | #elif defined(WIN32) | |
119 | # include <process.h> | |
120 | ||
121 | ||
1106b00e MS |
122 | /* |
123 | * '_cupsMutexInit()' - Initialize a mutex. | |
124 | */ | |
125 | ||
126 | void | |
127 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
128 | { | |
129 | InitializeCriticalSection(&mutex->m_criticalSection); | |
130 | mutex->m_init = 1; | |
131 | } | |
132 | ||
133 | ||
c7017ecc MS |
134 | /* |
135 | * '_cupsMutexLock()' - Lock a mutex. | |
136 | */ | |
137 | ||
138 | void | |
139 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
140 | { | |
141 | if (!mutex->m_init) | |
142 | { | |
143 | _cupsGlobalLock(); | |
144 | ||
145 | if (!mutex->m_init) | |
146 | { | |
147 | InitializeCriticalSection(&mutex->m_criticalSection); | |
148 | mutex->m_init = 1; | |
149 | } | |
150 | ||
151 | _cupsGlobalUnlock(); | |
152 | } | |
153 | ||
154 | EnterCriticalSection(&mutex->m_criticalSection); | |
155 | } | |
156 | ||
157 | ||
158 | /* | |
159 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
160 | */ | |
161 | ||
162 | void | |
163 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
164 | { | |
165 | LeaveCriticalSection(&mutex->m_criticalSection); | |
166 | } | |
167 | ||
168 | ||
1106b00e MS |
169 | /* |
170 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
171 | */ | |
172 | ||
173 | void | |
174 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
175 | { | |
176 | _cupsMutexInit((_cups_mutex_t *)rwlock); | |
177 | } | |
178 | ||
179 | ||
180 | /* | |
181 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
182 | */ | |
183 | ||
184 | void | |
185 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
186 | { | |
187 | _cupsMutexLock((_cups_mutex_t *)rwlock); | |
188 | } | |
189 | ||
190 | ||
191 | /* | |
192 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
193 | */ | |
194 | ||
195 | void | |
196 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
197 | { | |
198 | _cupsMutexLock((_cups_mutex_t *)rwlock); | |
199 | } | |
200 | ||
201 | ||
202 | /* | |
203 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
204 | */ | |
205 | ||
206 | void | |
207 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
208 | { | |
209 | _cupsMutexUnlock((_cups_mutex_t *)rwlock); | |
210 | } | |
211 | ||
212 | ||
c7017ecc MS |
213 | /* |
214 | * '_cupsThreadCreate()' - Create a thread. | |
215 | */ | |
216 | ||
f3c17241 | 217 | int /* O - 0 on failure, 1 on success */ |
c7017ecc MS |
218 | _cupsThreadCreate( |
219 | _cups_thread_func_t func, /* I - Entry point */ | |
220 | void *arg) /* I - Entry point context */ | |
221 | { | |
222 | return (_beginthreadex(NULL, 0, (LPTHREAD_START_ROUTINE) func, arg, 0, NULL) | |
223 | != 0); | |
224 | } | |
225 | ||
226 | ||
227 | #else | |
1106b00e MS |
228 | /* |
229 | * '_cupsMutexInit()' - Initialize a mutex. | |
230 | */ | |
231 | ||
232 | void | |
233 | _cupsMutexInit(_cups_mutex_t *mutex) /* I - Mutex */ | |
234 | { | |
235 | (void)mutex; | |
236 | } | |
237 | ||
238 | ||
c7017ecc MS |
239 | /* |
240 | * '_cupsMutexLock()' - Lock a mutex. | |
241 | */ | |
242 | ||
243 | void | |
244 | _cupsMutexLock(_cups_mutex_t *mutex) /* I - Mutex */ | |
245 | { | |
1106b00e | 246 | (void)mutex; |
c7017ecc MS |
247 | } |
248 | ||
249 | ||
250 | /* | |
251 | * '_cupsMutexUnlock()' - Unlock a mutex. | |
252 | */ | |
253 | ||
254 | void | |
255 | _cupsMutexUnlock(_cups_mutex_t *mutex) /* I - Mutex */ | |
256 | { | |
1106b00e MS |
257 | (void)mutex; |
258 | } | |
259 | ||
260 | ||
261 | /* | |
262 | * '_cupsRWInit()' - Initialize a reader/writer lock. | |
263 | */ | |
264 | ||
265 | void | |
266 | _cupsRWInit(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
267 | { | |
268 | (void)rwlock; | |
269 | } | |
270 | ||
271 | ||
272 | /* | |
273 | * '_cupsRWLockRead()' - Acquire a reader/writer lock for reading. | |
274 | */ | |
275 | ||
276 | void | |
277 | _cupsRWLockRead(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
278 | { | |
279 | (void)rwlock; | |
280 | } | |
281 | ||
282 | ||
283 | /* | |
284 | * '_cupsRWLockWrite()' - Acquire a reader/writer lock for writing. | |
285 | */ | |
286 | ||
287 | void | |
288 | _cupsRWLockWrite(_cups_rwlock_t *rwlock)/* I - Reader/writer lock */ | |
289 | { | |
290 | (void)rwlock; | |
291 | } | |
292 | ||
293 | ||
294 | /* | |
295 | * '_cupsRWUnlock()' - Release a reader/writer lock. | |
296 | */ | |
297 | ||
298 | void | |
299 | _cupsRWUnlock(_cups_rwlock_t *rwlock) /* I - Reader/writer lock */ | |
300 | { | |
301 | (void)rwlock; | |
c7017ecc | 302 | } |
f3c17241 MS |
303 | |
304 | ||
305 | /* | |
306 | * '_cupsThreadCreate()' - Create a thread. | |
307 | */ | |
308 | ||
309 | int /* O - 0 on failure, 1 on success */ | |
310 | _cupsThreadCreate( | |
311 | _cups_thread_func_t func, /* I - Entry point */ | |
312 | void *arg) /* I - Entry point context */ | |
313 | { | |
314 | fputs("DEBUG: CUPS was compiled without threading support, no thread " | |
315 | "created.\n", stderr); | |
316 | ||
317 | (void)func; | |
318 | (void)arg; | |
319 | ||
320 | return (0); | |
321 | } | |
c7017ecc MS |
322 | #endif /* HAVE_PTHREAD_H */ |
323 | ||
324 | ||
325 | /* | |
326 | * End of "$Id$". | |
327 | */ |