2-1.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_create() returns a unique timer ID for the current
 * process.
 * For this test, signal SIGALRM will be used, 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 NUMTESTS 3009 // 3009 appears to be max allowable timers

timer_t tid;
int tids[NUMTESTS];

int init_module(void)
{
	struct sigevent ev;
	int i,j;

	ev.sigev_notify = SIGEV_SIGNAL;
	ev.sigev_signo = SIGALRM;

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

		tids[i] = tid->id;
		for (j=0; j<i; j++){
		  if (tids[j]== tid->id){
			printf("Duplicate tid found %d\n", tid);
			printf("Test FAILED\n");
			return FAIL;
		}
		}
	}
	
	printf("No duplicate tids found\n");
	printf("Test PASSED\n");
	return PASS;
}
	
void cleanup_module(void){
    timer_delete(tid);
}