genericopenlibs/posixrealtimeextensions/src/timer_funcs.cpp
changeset 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/posixrealtimeextensions/src/timer_funcs.cpp	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,116 @@
+// Copyright (c) 2008-2009 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        : timer_funcs.cpp
+// Part of     : librt-timer specific cpp file
+// This is a project specific source file for building the 
+// timer related functions as part of librt library.
+// 
+//
+
+#include <signal.h>
+#include <time.h>
+#include <errno.h>
+
+#include "lposix.h"
+#include "timerhandler.h"
+
+const TInt KErrWouldBlock=-1000;
+
+extern "C" {
+
+/* Create new per-process timer using CLOCK_ID.  */
+EXPORT_C int timer_create (clockid_t __clock_id,
+                         struct sigevent *__restrict __evp,
+                         timer_t *__restrict __timerid)
+	{
+	if(__timerid == NULL)
+		{
+		errno = EFAULT;	
+		return -1;
+		}
+		
+	if(__clock_id != CLOCK_REALTIME)
+		{
+		errno = EINVAL;	
+		return -1;
+		}
+		
+	int err = getTimerHandler()->CreateTimer(*__timerid, __evp);
+	 
+	if (err == KErrWouldBlock)
+		{
+		return MapError(EAGAIN, errno);
+		}
+	
+	return MapError(err, errno);
+	}
+
+
+/* Delete timer TIMERID.  */
+EXPORT_C int timer_delete (timer_t __timerid)
+	{
+	return MapError(getTimerHandler()->RemoveTimer(__timerid),errno);
+	}
+
+
+
+/* Set timer TIMERID to VALUE, returning old value in OVLAUE.  */
+EXPORT_C int timer_settime (timer_t __timerid, int __flags,
+                          const struct itimerspec *__restrict __value,
+                          struct itimerspec *__restrict __ovalue)
+	{
+	return MapError(getTimerHandler()->SetTime(__timerid, __flags, __value, __ovalue),errno);
+	}
+
+/* Get current value of timer TIMERID and store it in VLAUE.  */
+EXPORT_C int timer_gettime (timer_t __timerid, struct itimerspec *__value)
+	{
+	if(__value == NULL)
+		{
+		errno = EFAULT;	
+		return -1;
+		}
+		
+	return MapError(getTimerHandler()->Time(__timerid, __value),errno);
+	}
+
+/* Get expiration overrun for timer TIMERID.  */
+EXPORT_C int timer_getoverrun (timer_t __timerid)
+	{
+		
+#if (!defined SYMBIAN_OE_POSIX_SIGNALS || !defined SYMBIAN_OE_LIBRT)
+	__timerid = __timerid;//warning fix	
+	errno = ENOSYS;
+	return -1;
+#else
+	int overrun = 0;
+	int lerr = MapError(getTimerHandler()->OverrunCount(__timerid, overrun),errno); 	
+	if(lerr == -1 && errno == EINVAL)
+		{
+		return lerr;	
+		}
+	else
+		{
+		overrun = (overrun <= 1) ? 0 : (overrun-1);
+		}
+ 	
+	return overrun;
+#endif		
+	}
+
+} // extern "C"
+
+//EOF
+
+