- Modifications to compile ImageMagick

ImageMagick/magick/semaphore-private.h

@@ -0,0 +1,79 @@
+/*
+  Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization
+  dedicated to making software imaging solutions freely available.
+  
+  You may not use this file except in compliance with the License.
+  obtain a copy of the License at
+  
+    http://www.imagemagick.org/script/license.php
+  
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+  MagickCore private methods to lock and unlock semaphores.
+*/
+#ifndef _MAGICKCORE_SEMAPHORE_PRIVATE_H
+#define _MAGICKCORE_SEMAPHORE_PRIVATE_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#if defined(MAGICKCORE_THREAD_SUPPORT)
+static pthread_mutex_t
+  semaphore_mutex = PTHREAD_MUTEX_INITIALIZER;
+#elif defined(MAGICKCORE_HAVE_WINTHREADS)
+static LONG
+  semaphore_mutex = 0;
+#else
+static ssize_t
+  semaphore_mutex = 0;
+#endif
+
+static inline void LockMagickMutex(void)
+{
+#if defined(MAGICKCORE_THREAD_SUPPORT)
+  {
+    int
+      status;
+
+    status=pthread_mutex_lock(&semaphore_mutex);
+    if (status != 0)
+      {
+        errno=status;
+        ThrowFatalException(ResourceLimitFatalError,"UnableToLockSemaphore");
+      }
+  }
+#elif defined(MAGICKCORE_HAVE_WINTHREADS)
+  while (InterlockedCompareExchange(&semaphore_mutex,1L,0L) != 0)
+    Sleep(10);
+#endif
+}
+
+static inline void UnlockMagickMutex(void)
+{
+#if defined(MAGICKCORE_THREAD_SUPPORT)
+  {
+    int
+      status;
+
+    status=pthread_mutex_unlock(&semaphore_mutex);
+    if (status != 0)
+      {
+        errno=status;
+        ThrowFatalException(ResourceLimitFatalError,"UnableToUnlockSemaphore");
+      }
+  }
+#elif defined(MAGICKCORE_HAVE_WINTHREADS)
+  InterlockedExchange(&semaphore_mutex,0L);
+#endif
+}
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif