Update to 2.0.0 tree from current Fremantle build

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

diff --git a/3rdparty/include/OpenEXR/IlmThread.h b/3rdparty/include/OpenEXR/IlmThread.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_H
+#define INCLUDED_ILM_THREAD_H
+
+//-----------------------------------------------------------------------------
+//
+//     class Thread
+//
+//     Class Thread is a portable interface to a system-dependent thread
+//     primitive.  In order to make a thread actually do something useful,
+//     you must derive a subclass from class Thread and implement the
+//     run() function.  If the operating system supports threading then
+//     the run() function will be executed int a new thread.
+//
+//     The actual creation of the thread is done by the start() routine
+//     which then calls the run() function.  In general the start()
+//     routine should be called from the constructor of the derived class.
+//
+//     The base-class thread destructor will join/destroy the thread.
+//
+//     IMPORTANT: Due to the mechanisms that encapsulate the low-level
+//     threading primitives in a C++ class there is a race condition
+//     with code resembling the following:
+//
+//         {
+//             WorkerThread myThread;
+//         } // myThread goes out of scope, is destroyed
+//           // and the thread is joined
+//
+//     The race is between the parent thread joining the child thread
+//     in the destructor of myThread, and the run() function in the
+//     child thread.  If the destructor gets executed first then run()
+//     will be called with an invalid "this" pointer.
+//
+//     This issue can be fixed by using a Semaphore to keep track of
+//     whether the run() function has already been called.  You can
+//     include a Semaphore member variable within your derived class
+//     which you post() on in the run() function, and wait() on in the
+//     destructor before the thread is joined.  Alternatively you could
+//     do something like this:
+//
+//         Semaphore runStarted;
+//
+//         void WorkerThread::run ()
+//         {
+//             runStarted.post()
+//             // do some work
+//             ...
+//         }
+//
+//         {
+//             WorkerThread myThread;
+//             runStarted.wait ();    // ensure that we have started
+//                                    // the run function
+//         } // myThread goes out of scope, is destroyed
+//           // and the thread is joined
+//
+//-----------------------------------------------------------------------------
+
+#include "OpenEXRConfig.h"
+
+#if defined _WIN32 || defined _WIN64
+    #ifdef NOMINMAX
+        #undef NOMINMAX
+    #endif
+    #define NOMINMAX
+    #include <windows.h>
+    #include <process.h>
+#elif HAVE_PTHREAD
+    #include <pthread.h>
+#endif
+
+namespace IlmThread {
+
+//
+// Query function to determine if the current platform supports
+// threads AND this library was compiled with threading enabled.
+//
+
+bool supportsThreads ();
+
+
+class Thread
+{
+  public:
+
+    Thread ();
+    virtual ~Thread ();
+
+    void               start ();
+    virtual void       run () = 0;
+    
+  private:
+
+    #if defined _WIN32 || defined _WIN64
+       HANDLE _thread;
+    #elif HAVE_PTHREAD
+       pthread_t _thread;
+    #endif
+
+    void operator = (const Thread& t); // not implemented
+    Thread (const Thread& t);          // not implemented
+};
+
+
+} // namespace IlmThread
+
+#endif