Update to 2.0.0 tree from current Fremantle build

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

diff --git a/3rdparty/include/OpenEXR/IlmThreadMutex.h b/3rdparty/include/OpenEXR/IlmThreadMutex.h
new file mode 100644 (file)
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+++ b/3rdparty/include/OpenEXR/IlmThreadMutex.h
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+///////////////////////////////////////////////////////////////////////////
+//
+// 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_MUTEX_H
+#define INCLUDED_ILM_THREAD_MUTEX_H
+
+//-----------------------------------------------------------------------------
+//
+//     class Mutex, class Lock
+//
+//     Class Mutex is a wrapper for a system-dependent mutual exclusion
+//     mechanism.  Actual locking and unlocking of a Mutex object must
+//     be performed using an instance of a Lock (defined below).
+//
+//     Class lock provides safe locking and unlocking of mutexes even in
+//     the presence of C++ exceptions.  Constructing a Lock object locks
+//     the mutex; destroying the Lock unlocks the mutex.
+//
+//     Lock objects are not themselves thread-safe.  You should never
+//     share a Lock object among multiple threads.
+//
+//     Typical usage:
+//    
+//         Mutex mtx;  // Create a Mutex object that is visible
+//                     //to multiple threads
+//
+//         ...         // create some threads
+//
+//         // Then, within each thread, construct a critical section like so:
+//
+//         {
+//             Lock lock (mtx);        // Lock constructor locks the mutex
+//             ...                     // do some computation on shared data
+//         }                           // leaving the block unlocks the mutex
+//
+//-----------------------------------------------------------------------------
+
+#include "OpenEXRConfig.h"
+
+#if defined _WIN32 || defined _WIN64
+    #ifdef NOMINMAX
+        #undef NOMINMAX
+    #endif
+    #define NOMINMAX
+    #include <windows.h>
+#elif HAVE_PTHREAD
+    #include <pthread.h>
+#endif
+
+namespace IlmThread {
+
+class Lock;
+
+
+class Mutex
+{
+  public:
+
+    Mutex ();
+    virtual ~Mutex ();
+
+  private:
+
+    void       lock () const;
+    void       unlock () const;
+
+    #if defined _WIN32 || defined _WIN64
+       mutable CRITICAL_SECTION _mutex;
+    #elif HAVE_PTHREAD
+       mutable pthread_mutex_t _mutex;
+    #endif
+
+    void operator = (const Mutex& M);  // not implemented
+    Mutex (const Mutex& M);            // not implemented
+    
+    friend class Lock;
+};
+
+
+class Lock
+{
+  public:
+
+    Lock (const Mutex& m, bool autoLock = true):
+       _mutex (m),
+       _locked (false)
+    {
+        if (autoLock)
+        {
+            _mutex.lock();
+            _locked = true;
+        }
+    }
+    
+    ~Lock ()
+    {
+        if (_locked)
+            _mutex.unlock();
+    }
+    
+    void acquire ()
+    {
+        _mutex.lock();
+        _locked = true;
+    }
+    
+    void release ()
+    {
+        _mutex.unlock();
+        _locked = false;
+    }
+    
+    bool locked ()
+    {
+        return _locked;
+    }
+
+  private:
+
+    const Mutex &      _mutex;
+    bool               _locked;
+};
+
+
+} // namespace IlmThread
+
+#endif