8-2.c

fsmlabs的real time linux的内核

/*   
 * Copyright (c) 2002, Intel Corporation. All rights reserved.
 * Created by:  julie.n.fleischer REMOVE-THIS AT intel DOT com
 * This file is licensed under the GPL license.  For the full content
 * of this license, see the COPYING file at the top level of this 
 * source tree.
 *
 * Test that timer_settime() will return ovalue.it_value = 0 
 * and ovalue.it_interval = 0 if
 * the timer was previously disarmed because it had just expired with
 * no repeating interval.
 *
 * For this test, signal SIGCONT will be used so that the test will
 * not abort.  Clock CLOCK_REALTIME will be used.
 */

#include <time.h>
#include <signal.h>
#include "compat.h"

#define PASS 0
#define FAIL 1
#define UNRESOLVED 2

#define TIMERSEC 1
#define SLEEPDELTA 1
#define SIGCONT RTL_SIGUSR1

timer_t tid;
pthread_t th;

void *th_code(void *arg)
{
	struct itimerspec its, oits;

	its.it_interval.tv_sec = 0; its.it_interval.tv_nsec = 0;
	its.it_value.tv_sec = TIMERSEC;
	its.it_value.tv_nsec = 0;

	/*
	 * set up timer that will expire
	 */
	if (timer_settime(tid, 0, &its, &oits) != 0) {
		perror("timer_settime() did not return success\n");
		return UNRESOLVED;
	}

	/*
	 * let timer expire (just call sleep())
	 */
	sleep(TIMERSEC+SLEEPDELTA);

	/*
	 * assign oits parameters so they _must_ be reset
	 */
	oits.it_value.tv_sec = 1000; oits.it_value.tv_nsec = 1000;
	oits.it_interval.tv_sec = 1000; oits.it_interval.tv_nsec = 1000;

	if (timer_settime(tid, 0, &its, &oits) != 0) {
		perror("timer_settime() did not return success\n");
		return UNRESOLVED;
	}


	if ( (0 == oits.it_value.tv_sec) &&
		(0 == oits.it_value.tv_nsec) &&
		(0 == oits.it_interval.tv_sec) &&
		(0 == oits.it_interval.tv_nsec)) {
		printf("Test PASSED\n");
		return PASS;
	} else {
		printf("Test FAILED:  value: tv_sec %d tv_nsec %d\n",
				(int) oits.it_value.tv_sec,
				(int) oits.it_value.tv_nsec);

		printf("Test FAILED:  interval: tv_sec %d tv_nsec %d\n",
				(int) oits.it_interval.tv_sec,
				(int) oits.it_interval.tv_nsec);
		return FAIL;
	}

	return UNRESOLVED;
}




int init_module(void){
  struct sigevent ev;
  int err=0;

  ev.sigev_notify = SIGEV_SIGNAL;
  ev.sigev_signo = SIGCONT;

  if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) {
    perror("timer_create() did not return success\n");
    return UNRESOLVED;
  }

  err=pthread_create(&th,NULL,th_code,(void *) 0);

  return err;

}

void cleanup_module(void)
{
  timer_delete(tid);
  pthread_delete_np(th);
}