test.c

#include <pthread.h>
#include <semaphore.h>
#include <stddef.h>
#include <stdio.h>
#include <time.h>

void *thread(void *arg) {
	sem_t *sem = (sem_t *)arg;

	for (size_t i = 0;; ++i) {
		pthread_mutex_t mutexes[10];
		
		for (size_t j = 0; j < sizeof(mutexes) / sizeof(mutexes[0]); ++j) {
			pthread_mutex_init(&mutexes[j], NULL);
		}

		for (size_t j = 0; j < sizeof(mutexes) / sizeof(mutexes[0]); ++j) {
			pthread_mutex_destroy(&mutexes[j]);
		}

		if ((i % 100) == 0) {
			sem_post(sem);
		}
	}

	return NULL;
}

#define THREADS 4

int main() {
	pthread_t threads[THREADS];
	sem_t sems[THREADS];

	for (size_t i = 0; i < THREADS; ++i) {
		sem_init(&sems[i], 0, 0);
		pthread_create(&threads[i], NULL, thread, (void *)&sems[i]);
	}

	for (;;) {
		for (size_t i = 0; i < THREADS; ++i) {
			struct timespec ts;
			
			clock_gettime(CLOCK_REALTIME, &ts);
			ts.tv_sec += 1;

			if (sem_timedwait(&sems[i], &ts) != 0) {
				printf("\nthread #%d timeout\n", i);
				return -1;
			}
		}
	}

	return 0;
}