Moved OpenThreads directly into OpenSceneGraph/trunk rather than being introduced via svn:externals.

This change has been done to make it easier for OpenSceneGraph users to check out the svn via https 
without any conflicts introduced with a http externals.

src/OpenThreads/pthreads/PThreadBarrierPrivateData.h

@@ -0,0 +1,52 @@
+/* -*-c++-*- OpenThreads library, Copyright (C) 2002 - 2007  The Open Thread Group
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+
+//
+// PThreadBarrierPrivateData.h - private data structure for barrier
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+
+#ifndef _PTHREADBARRIERPRIVATEDATA_H_
+#define _PTHREADBARRIERPRIVATEDATA_H_
+
+#include <pthread.h>
+#include <OpenThreads/Barrier>
+
+namespace OpenThreads {
+
+class PThreadBarrierPrivateData {
+
+    friend class Barrier;
+
+private:
+
+    PThreadBarrierPrivateData() {};
+    
+    virtual ~PThreadBarrierPrivateData() {};
+
+    pthread_cond_t     cond;            // cv for waiters at barrier
+
+    pthread_mutex_t    lock;            // mutex for waiters at barrier
+
+    volatile int       maxcnt;          // number of threads to wait for
+
+    volatile int       cnt;             // number of waiting threads
+
+    volatile int       phase;           // flag to seperate two barriers
+
+};
+
+}
+
+#endif //_PTHREADBARRIERPRIVATEDATA_H_