2 Copyright 1999-2018 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 https://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_OPENMP_SUPPORT)
34 #elif defined(MAGICKCORE_THREAD_SUPPORT)
35 static pthread_mutex_t
36 semaphore_mutex = PTHREAD_MUTEX_INITIALIZER;
37 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
45 static MagickBooleanType
46 active_mutex = MagickFalse;
48 static inline void DestroyMagickMutex(void)
50 #if defined(MAGICKCORE_OPENMP_SUPPORT)
51 if (active_mutex != MagickFalse)
52 omp_destroy_lock(&semaphore_mutex);
54 active_mutex=MagickFalse;
57 static inline void InitializeMagickMutex(void)
59 #if defined(MAGICKCORE_OPENMP_SUPPORT)
60 if (active_mutex == MagickFalse)
61 omp_init_lock(&semaphore_mutex);
63 active_mutex=MagickTrue;
66 static inline void LockMagickMutex(void)
68 #if defined(MAGICKCORE_OPENMP_SUPPORT)
69 omp_set_lock(&semaphore_mutex);
70 #elif defined(MAGICKCORE_THREAD_SUPPORT)
75 status=pthread_mutex_lock(&semaphore_mutex);
79 ThrowFatalException(ResourceLimitFatalError,"UnableToLockSemaphore");
82 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
83 while (InterlockedCompareExchange(&semaphore_mutex,1L,0L) != 0)
88 static inline void UnlockMagickMutex(void)
90 #if defined(MAGICKCORE_OPENMP_SUPPORT)
91 omp_unset_lock(&semaphore_mutex);
92 #elif defined(MAGICKCORE_THREAD_SUPPORT)
97 status=pthread_mutex_unlock(&semaphore_mutex);
101 ThrowFatalException(ResourceLimitFatalError,"UnableToUnlockSemaphore");
104 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
105 InterlockedExchange(&semaphore_mutex,0L);
109 #if defined(__cplusplus) || defined(c_plusplus)