/*      $OpenBSD: pthread_mutex_lock.c,v 1.1 2011/10/01 10:26:59 fgsch Exp $    */
/*
 * Federico G. Schwindt <fgsch@openbsd.org>, 2011. Public Domain.
 */
#include <pthread.h>
#include <signal.h>
#include <unistd.h>
#include "test.h"

pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
volatile sig_atomic_t hits = 0;

void
handler(int sig)
{
        hits++;
}

void *
thr_lock(void *arg)
{
        CHECKr(pthread_mutex_lock(&lock));
        return (NULL);
}

int
main(int argc, char **argv)
{
        struct sigaction sa;
        pthread_t tid;

        bzero(&sa, sizeof(sa));
        sa.sa_handler = handler;
        CHECKe(sigaction(SIGUSR1, &sa, NULL));

        CHECKr(pthread_mutex_lock(&lock));
        CHECKr(pthread_create(&tid, NULL, thr_lock, NULL));
        sleep(2);

        CHECKr(pthread_kill(tid, SIGUSR1));
        sleep(1);

        CHECKr(pthread_mutex_unlock(&lock));
        ASSERT(hits == 1);
        SUCCEED;
}