pxschedtest.c

VxWorks入门例程

#include "vxWorks.h"
#include "stdio.h"
#include "time.h"
#include "sched.h"
#include "kernelLib.h"

#define PX_NEW_PRIORITY 150

STATUS priorityTest(void)
{
	struct sched_param myParam;
	myParam.sched_priority=PX_NEW_PRIORITY;
	if(sched_setparam(0,&myParam)==ERROR)
	{
		printf("error setting priority\n");
		return(ERROR);
	}
	
	if(sched_getparam(0,&myParam)==ERROR)
	{
		printf("error getting priority\n");
		return(ERROR);
	}

	if(myParam.sched_priority!=PX_NEW_PRIORITY)
	{
		printf("error priority do not match\n");
		return(ERROR);
	}
	else
		printf("task priority=%d\n",myParam.sched_priority);
	return(OK);
}

STATUS schedulerTest(void)
{
	int policy;
	if((policy=sched_getscheduler (0))==ERROR)
	{
		printf("getting scheduler falled\n");
		return(ERROR);
	}
	if(policy==SCHED_FIFO)
		printf("current scheduling policy is FIFO\n");
	else
		printf("current scheduling policy is RR\n");
	return(OK);
}

STATUS rrgetintervalTest(void)
{
	struct timespec slice;
	kernelTimeSlice(30);
	if(sched_rr_get_interval(0,&slice)==ERROR)
	{
		printf("get interval test failed\n");
		return(ERROR);
	}
	printf("time slice is %d seconds and %d nanoseconds\n",slice.tv_sec,slice.tv_nsec);
	schedulerTest();
	kernelTimeSlice(0);
	schedulerTest();
	return(OK);
}