zfsclose.c

zilog的实时操作系统RZK,可以移植到多种处理器上

/*
 * File       : ZFSClose.c
 * Description: This file contains the implementation of ZFSClose API
 * Author     : Mahadev K C
 * Created on : 30-APR-2003
 *
 * 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 * This file contains unpublished confidential and proprietary information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 "glextern.h"

//Function Name: ZFSClose
//Description: This API closes an opened file
ZFS_STATUS_t ZFSClose( IN ZFS_HANDLE_t handle )
{
        #define handle ((PZFS_OPEN_REC_t)handle)
	UINT preempt_status ;
	

	// if ZFS is not initialized, return error
	if( !IsZFSInited() )
		return ZFSERR_NOT_INITIALIZED ;
	
	// first check whether the handle is valid or not
	if( handle->status != ZFS_OR_MAGIC_NUM )
		return ZFSERR_INVALID_HANDLE ;

	preempt_status = DisablePreemption() ;

	// got the OR, change the status to 0x00
	handle->status = ZFS_OR_INVALID_MAGIC_NUM ;

	EnablePreemption( preempt_status ) ;

	return ZFSERR_SUCCESS ;
}