xref: /external/ltp/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-2.c

/*
 * Copyright (c) 2002, Intel Corporation. All rights reserved.
 * Created by:  bing.wei.liu 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 pthread_mutexattr_getprioceiling()
 *
 * Gets the priority ceiling attribute of a mutexattr object (which was prev. created
 * by the function pthread_mutexattr_init()).
 *
 * Steps:
 * 1.  Initialize a pthread_mutexattr_t object with pthread_mutexattr_init()
 * 2.  Get the min and max boundries for SCHED_FIFO of what prioceiling can be.
 * 3.  In a for loop, go through each valid SCHED_FIFO value, set the prioceiling, then
 *     get the prio ceiling.  These should always be the same.  If not, fail the test.
 *
 */

#include <pthread.h>
#include <stdio.h>
#include <sched.h>
#include "posixtest.h"

int main(void)
{

	/* Make sure there is prioceiling capability. */
	/* #ifndef _POSIX_PRIORITY_SCHEDULING
	   fprintf(stderr,"prioceiling attribute is not available for testing\n");
	   return PTS_UNRESOLVED;
	   #endif */

	pthread_mutexattr_t mta;
	int prioceiling, max_prio, min_prio, i;

	/* Initialize a mutex attributes object */
	if (pthread_mutexattr_init(&mta) != 0) {
		perror("Error at pthread_mutexattr_init()\n");
		return PTS_UNRESOLVED;
	}

	/* Get the max and min prio according to SCHED_FIFO (posix scheduling policy) */
	max_prio = sched_get_priority_max(SCHED_FIFO);
	min_prio = sched_get_priority_min(SCHED_FIFO);

	for (i = min_prio; (i < max_prio + 1); i++) {
		/* Set the prioceiling to a priority number in the boundries
		 * of SCHED_FIFO policy */
		if (pthread_mutexattr_setprioceiling(&mta, i)) {
			printf("Error setting prioceiling to %d\n", i);
			return PTS_UNRESOLVED;
		}

		/* Get the prioceiling mutex attr. */
		if (pthread_mutexattr_getprioceiling(&mta, &prioceiling) != 0) {
			fprintf(stderr,
				"Error obtaining the attribute process-shared\n");
			return PTS_UNRESOLVED;
		}

		/* Make sure that prioceiling is withing the legal SCHED_FIFO boundries. */
		if (prioceiling != i) {
			printf
			    ("Test FAILED: Set prioceiling and get prioceiling did not match.\n");
			return PTS_FAIL;
		}
	}

	printf("Test PASSED\n");
	return PTS_PASS;
}