/*      $OpenBSD: barrier.c,v 1.2 2020/04/06 00:01:08 pirofti Exp $     */
/* Paul Irofti <paul@irofti.net>, 2012. Public Domain. */

#include <stdio.h>

#include <pthread.h>
#include <errno.h>

#include "test.h"

void *
foo(void *arg)
{
        int rc = 0;
        pthread_barrier_t b = (pthread_barrier_t)arg;
        rc = pthread_barrier_wait(&b);
        if (rc != 0 && rc != PTHREAD_BARRIER_SERIAL_THREAD)
                PANIC("pthread_barrier_wait returned %d", rc);
        return NULL;
}

int main()
{
        int i;
        pthread_t thr[10];
        pthread_barrier_t b;

        pthread_barrierattr_t attr;
        CHECKr(pthread_barrierattr_init(&attr));
        CHECKr(pthread_barrierattr_getpshared(&attr, &i));
        _CHECK(i, == PTHREAD_PROCESS_PRIVATE, strerror(_x));
        CHECKr(pthread_barrierattr_setpshared(&attr, i));
        _CHECK(pthread_barrierattr_setpshared(&attr, PTHREAD_PROCESS_SHARED), == ENOTSUP, strerror(_x));

        CHECKr(pthread_barrier_init(&b, &attr, 10));
        for (i = 0; i < 10; i++) {
                printf("Thread %d started\n", i);
                CHECKr(pthread_create(&thr[i], NULL, foo, (void *)b));
        }
        for (i = 0; i < 10; i++) {
                CHECKr(pthread_join(thr[i], NULL));
        }
        CHECKr(pthread_barrierattr_destroy(&attr));
        CHECKr(pthread_barrier_destroy(&b));

        SUCCEED;
}