stoptimer.c
1.5 KB
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/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include <rmon.h>
#include "osint.h"
#include "viint.h"
/*
* This routine stops the timer t.
*/
int
osStopTimer(OSTimer *t)
{
register u32 savedMask;
OSTimer *timep;
#ifdef _DEBUG
/* Check that VI manager is running */
if (!__osViDevMgr.active) {
__osError(ERR_OSSTOPTIMER, 0);
return(0);
}
#endif
/* Make sure timer is on the list */
if (t->next == NULL)
return(-1);
/* disable interrupts */
savedMask = __osDisableInt();
/*
* Remove timer from the running timer list and adjust
* next timer in the list
*/
timep = t->next;
if (timep != __osTimerList)
timep->value += t->value;
t->prev->next = t->next;
t->next->prev = t->prev;
t->next = NULL;
t->prev = NULL;
/*
* If no timer left in the list, we need to clear interrupt */
if (__osTimerList->next == __osTimerList)
__osSetCompare(0);
__osRestoreInt(savedMask);
return(0);
}