deletetimer.c

zilog的实时操作系统RZK,可以移植到多种处理器上

/*
* File			:	RZKDeleteTimer.c
*
* Description	:	This file contains the RZKDeleteTimer function which 
*					deletes the timer.
* 
* Copyright 2004 ZiLOG Inc.  ALL RIGHTS RESERVED.
*
* This file contains unpublished confidential and proprietary information
* of ZiLOG, Inc.
* NO PART OF THIS WORK MAY BE DUPLICATED, STORED, PUBLISHED OR DISCLOSED 
* IN ANY FORM WITHOUT THE PRIOR WRITTEN CONSENT OF ZiLOG, INC.
* This is not a license and no use of any kind of this work is authorized
* in the absence of a written license granted by ZiLOG, Inc. in ZiLOG's 
* sole discretion 
*/

#include "ZSysgen.h"
#include "ZTypes.h"
#include "ZTimer.h"

#define pTimer ((RZK_TIMER_t *)hTimer)



/*
* Function		:	RZKDeleteTimer
*
* Description	:	This function deletes a software timer
* 
* Inputs		:	hTimer - handle to timer object	
*
* Outputs		:	RZKERR_INVALID_HANDLE - handle of the timer is invalid.
*					RZKERR_CB_BUSY - If the timer control block is busy
*
* Dependencies	:	None
*/

RZK_STATUS_t RZKDeleteTimer(
					 RZK_TIMERHANDLE_t hTimer
					 )
{
#ifdef RZK_DEBUG
	if((pTimer == NULL) || (pTimer -> uState == 0) || (pTimer -> magic_num != MAGIC_NUM_TIMER))
		return RZKERR_INVALID_HANDLE;
#endif

#ifndef RZK_PERFORMANCE
	if(!(pTimer->uState & OBJECT_CREATED))
		return RZKERR_CB_BUSY;
#endif

	if(pTimer->uState & TIMER_DISABLE)
	{
		/* Set the uState to zero */
		pTimer->uState = 0;
		return RZKERR_SUCCESS;
	}
	else
		return RZKERR_OBJECT_IN_USE;
} /* end of DeleteTimer */