Update to 2.0.0 tree from current Fremantle build

[opencv] / 3rdparty / include / OpenEXR / IlmThreadSemaphore.h

diff --git a/3rdparty/include/OpenEXR/IlmThreadSemaphore.h b/3rdparty/include/OpenEXR/IlmThreadSemaphore.h
new file mode 100644 (file)
index 0000000..98b9e2e
--- /dev/null
+++ b/3rdparty/include/OpenEXR/IlmThreadSemaphore.h
@@ -0,0 +1,109 @@
+///////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2005, Industrial Light & Magic, a division of Lucas
+// Digital Ltd. LLC
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// *       Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// *       Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// *       Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+#ifndef INCLUDED_ILM_THREAD_SEMAPHORE_H
+#define INCLUDED_ILM_THREAD_SEMAPHORE_H
+
+//-----------------------------------------------------------------------------
+//
+//     class Semaphore -- a wrapper class for
+//     system-dependent counting semaphores
+//
+//-----------------------------------------------------------------------------
+
+#include "OpenEXRConfig.h"
+
+#if defined _WIN32 || defined _WIN64
+    #ifdef NOMINMAX
+        #undef NOMINMAX
+    #endif
+    #define NOMINMAX
+    #include <windows.h>
+#elif HAVE_PTHREAD && !HAVE_POSIX_SEMAPHORES
+    #include <pthread.h>
+#elif HAVE_PTHREAD && HAVE_POSIX_SEMAPHORES
+    #include <semaphore.h>
+#endif
+
+namespace IlmThread {
+
+
+class Semaphore
+{
+  public:
+
+    Semaphore (unsigned int value = 0);
+    virtual ~Semaphore();
+
+    void       wait();
+    void       post();
+    int                value() const;
+
+  private:
+
+    #if defined _WIN32 || defined _WIN64
+
+       mutable HANDLE _semaphore;
+
+    #elif HAVE_PTHREAD && !HAVE_POSIX_SEMAPHORES
+
+       //
+       // If the platform has Posix threads but no semapohores,
+       // then we implement them ourselves using condition variables
+       //
+
+       struct sema_t
+       {
+           unsigned int count;
+           unsigned long numWaiting;
+           pthread_mutex_t mutex;
+           pthread_cond_t nonZero;
+       };
+
+       mutable sema_t _semaphore;
+
+    #elif HAVE_PTHREAD && HAVE_POSIX_SEMAPHORES
+
+       mutable sem_t _semaphore;
+
+    #endif
+
+    void operator = (const Semaphore& s);      // not implemented
+    Semaphore (const Semaphore& s);            // not implemented
+};
+
+
+} // namespace IlmThread
+
+#endif