genericopenlibs/openenvcore/libpthread/src/pthread_once.cpp
changeset 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/openenvcore/libpthread/src/pthread_once.cpp	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,73 @@
+// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Name        : pthread_once.cpp
+// Part of     : pthread
+// Interface   : POSIX, pthread
+// POSIX implementation of mutexes on Symbian
+// Version     :
+//
+
+
+
+#include "mutextypes.h"
+
+EXPORT_C int pthread_once(pthread_once_t * once_control, 
+                          thread_init_routine init_routine)
+{
+  
+#ifndef NOUSE_INTERNALS
+    void* tlsPtr;
+    // Get the TLS pointer
+    tlsPtr = _pthread_getTls();  
+
+    if(!tlsPtr)
+    {
+        return ENOMEM;
+    }
+#endif  
+  
+    if(!once_control || !init_routine)
+    {
+        return EINVAL;
+    }
+
+    if (*once_control == _EDone) 
+    {
+        return 0;   
+    }
+  
+#ifndef NOUSE_INTERNALS  
+    _pthread_atomicMutexLock(tlsPtr);
+#endif  
+  
+  
+    if(*once_control == _EDone)
+    {
+
+#ifndef  NOUSE_INTERNALS   
+        _pthread_atomicMutexUnlock(tlsPtr);
+#endif      
+        return 0;
+    }
+  
+    *once_control = _EDoing;
+    init_routine();
+    *once_control = _EDone;
+#ifndef NOUSE_INTERNALS    
+    _pthread_atomicMutexUnlock(tlsPtr);
+#endif   
+    return 0;
+}
+
+// End of File