--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/openenvcore/libpthread/src/sem_trywait.cpp	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,74 @@
+// 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     : sem_trywait.cpp
+// Part of  : PThread library
+// sem_trywait call is implemented.
+// Version:
+//
+
+
+
+#include <e32def.h>
+#include <errno.h>
+
+#include "semaphore.h"
+#include "semaphoretypes.h"
+#include "pthread.h"
+
+EXPORT_C int sem_trywait (sem_t * sem)
+{
+    if (!sem || !(*sem))
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    _sem_t* gsem = *sem;
+    if(gsem->iState != _sem_t::EInitialized)
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    if(gsem->iCount <=0)
+    {
+        errno = EAGAIN;
+        return -1;
+    }
+
+    gsem->iMutex.Wait(); 
+    if(gsem->iState != _sem_t::EInitialized) 
+    { 
+        errno = EINVAL; 
+        return -1; 
+    }
+
+    //mutex still locked
+    int retval=0;
+    if(gsem->iCount > 0)
+    {
+        gsem->iCount--; 
+        retval = 0;
+    }
+    else
+    {
+        errno = EAGAIN;
+        retval = -1;
+    }
+    gsem->iMutex.Signal();
+    return retval;
+}//sem_trywait
+
+//End of File
+