2 Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization
3 dedicated to making software imaging solutions freely available.
5 You may not use this file except in compliance with the License.
6 obtain a copy of the License at
8 http://www.imagemagick.org/script/license.php
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
16 MagickCore private methods to lock and unlock semaphores.
18 #ifndef _MAGICKCORE_SEMAPHORE_PRIVATE_H
19 #define _MAGICKCORE_SEMAPHORE_PRIVATE_H
21 #if defined(__cplusplus) || defined(c_plusplus)
25 extern MagickPrivate MagickBooleanType
26 SemaphoreComponentGenesis(void);
28 extern MagickPrivate void
29 SemaphoreComponentTerminus(void);
31 #if defined(MAGICKCORE_THREAD_SUPPORT)
32 static pthread_mutex_t
33 semaphore_mutex = PTHREAD_MUTEX_INITIALIZER;
34 #elif defined(MAGICKCORE_HAVE_WINTHREADS)
42 static inline void LockMagickMutex(void)
44 #if defined(MAGICKCORE_THREAD_SUPPORT)
49 status=pthread_mutex_lock(&semaphore_mutex);
53 ThrowFatalException(ResourceLimitFatalError,"UnableToLockSemaphore");
56 #elif defined(MAGICKCORE_HAVE_WINTHREADS)
57 while (InterlockedCompareExchange(&semaphore_mutex,1L,0L) != 0)
62 static inline void UnlockMagickMutex(void)
64 #if defined(MAGICKCORE_THREAD_SUPPORT)
69 status=pthread_mutex_unlock(&semaphore_mutex);
73 ThrowFatalException(ResourceLimitFatalError,"UnableToUnlockSemaphore");
76 #elif defined(MAGICKCORE_HAVE_WINTHREADS)
77 InterlockedExchange(&semaphore_mutex,0L);
81 #if defined(__cplusplus) || defined(c_plusplus)