testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/15-1.c

/*
 * 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() sets errno to EAGAIN if the system doesn't
 * have enough queuing resources to honor this request or the creation
 * of the timer would exceed the allowable timers that the calling process
 * can create.
 *
 * Finding the true limits of the system would be a stress test, so this
 * test will make a best attempt by going up to TIMER_MAX.  If this
 * does not work, test will output PASS and say that results were
 * inconclusive.
 *
 * For this test, signal SIGALRM will be used, clock CLOCK_REALTIME
 * will be used.
 */

#include <time.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>
#include <limits.h>
#include "posixtest.h"

int main(int argc, char *argv[])
{
#ifdef TIMER_MAX
	struct sigevent ev;
	timer_t tid;
	int i;

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

	for (i=0; i<TIMER_MAX+1;i++) {
		if (timer_create(CLOCK_REALTIME, &ev, &tid) == -1) {
			printf("Stopped after %d timers.\n", i);
			if (EAGAIN == errno) {
				printf("Test PASSED\n");
				return PTS_PASS;
			} else {
				printf("errno != EAGAIN\n");
				printf("Test FAILED\n");
				return PTS_FAIL;
			}
		}

	}

	printf("timer_create() with > TIMER_MAX timers created\n");
	printf("Test INCONCLUSIVE - mark as PASS\n");
	return PTS_PASS;
#else
	return PTS_PASS;
#endif
}