cxerst.c

来自「上传一个带源代码的嵌入式实时多任务操作系统CMX」· C语言 代码 · 共 47 行

/*********************************************************

Copyright (c) CMX Company. 1999. All rights reserved

*********************************************************/
/* version 5.30 */

#define CMXMODULE 1

#include <cxfuncs.h>	/* get cmx include header file */
#include <cxextern.h>	/* get cmx include header file */

#if (defined(CMXTRACKER) || defined(WINTRACKER))
#include <cmxtrack.h>	/* get cmx include header file */
#endif

/***************************************************************
 This allows a task to reset a task's event flags that they
 would like to be cleared.
***************************************************************/
byte K_Event_Reset(byte tskid,word16 event)
{
	tcbpointer tcbptr;

	if(K_I_Get_Ptr(tskid,&tcbptr))	/* send address of pointer */
		{
#if (defined(CMXTRACKER) || defined(WINTRACKER))
		if (CMXTRACKER_ON)
			{
			cmxtracker_in2(CXERST_K_ERROR,tskid);
			}
#endif
		return(K_ERROR);
		}
	K_I_Disable_Sched();	/* set task block */
	tcbptr->e_flags &= (~event);		/* place the event bit(s) into clear state, indicated by mask. */
#if (defined(CMXTRACKER) || defined(WINTRACKER))
		if (CMXTRACKER_ON)
			{
			cmxtracker_in4(CXERST_K_OK,tskid,event);
			}
#endif
	K_I_Func_Return();	/* release task block */
	return(K_OK);	/* return good status, if task not committing suicide */
}