--- /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
+