1 /* $OpenBSD: pthread_mutex_lock.c,v 1.1 2011/10/01 10:26:59 fgsch Exp $ */
2 /*
3 * Federico G. Schwindt <fgsch@openbsd.org>, 2011. Public Domain.
4 */
5 #include <pthread.h>
6 #include <signal.h>
7 #include <unistd.h>
8 #include "test.h"
9
10 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
11 volatile sig_atomic_t hits = 0;
12
13 void
handler(int sig)14 handler(int sig)
15 {
16 hits++;
17 }
18
19 void *
thr_lock(void * arg)20 thr_lock(void *arg)
21 {
22 CHECKr(pthread_mutex_lock(&lock));
23 return (NULL);
24 }
25
26 int
main(int argc,char ** argv)27 main(int argc, char **argv)
28 {
29 struct sigaction sa;
30 pthread_t tid;
31
32 bzero(&sa, sizeof(sa));
33 sa.sa_handler = handler;
34 CHECKe(sigaction(SIGUSR1, &sa, NULL));
35
36 CHECKr(pthread_mutex_lock(&lock));
37 CHECKr(pthread_create(&tid, NULL, thr_lock, NULL));
38 sleep(2);
39
40 CHECKr(pthread_kill(tid, SIGUSR1));
41 sleep(1);
42
43 CHECKr(pthread_mutex_unlock(&lock));
44 ASSERT(hits == 1);
45 SUCCEED;
46 }
47