static void wait_code (void) { struct timespec ts = { .tv_sec = 0, .tv_nsec = 200000000 }; while (nanosleep (&ts, &ts) < 0) ; } #ifdef WAIT_IN_CHILD static pthread_barrier_t b; #endif static void * tf1 (void *arg) { #ifdef WAIT_IN_CHILD int e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); exit (1); } wait_code (); #endif pthread_join ((pthread_t) arg, NULL); exit (42); }
static void * tf2 (void *arg) { #ifdef WAIT_IN_CHILD int e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); exit (1); } wait_code (); #endif pthread_join ((pthread_t) arg, NULL); exit (43); }
static int do_test (void) { #ifdef WAIT_IN_CHILD if (pthread_barrier_init (&b, NULL, 2) != 0) { puts ("barrier_init failed"); return 1; } #endif pthread_t th; int err = pthread_join (pthread_self (), NULL); if (err == 0) { puts ("1st circular join succeeded"); return 1; } if (err != EDEADLK) { printf ("1st circular join %d, not EDEADLK\n", err); return 1; } if (pthread_create (&th, NULL, tf1, (void *) pthread_self ()) != 0) { puts ("1st create failed"); return 1; } #ifndef WAIT_IN_CHILD wait_code (); #endif if (pthread_cancel (th) != 0) { puts ("cannot cancel 1st thread"); return 1; } #ifdef WAIT_IN_CHILD int e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); return 1; } #endif void *r; err = pthread_join (th, &r); if (err != 0) { printf ("cannot join 1st thread: %d\n", err); return 1; } if (r != PTHREAD_CANCELED) { puts ("1st thread not canceled"); return 1; } err = pthread_join (pthread_self (), NULL); if (err == 0) { puts ("2nd circular join succeeded"); return 1; } if (err != EDEADLK) { printf ("2nd circular join %d, not EDEADLK\n", err); return 1; } if (pthread_create (&th, NULL, tf2, (void *) pthread_self ()) != 0) { puts ("2nd create failed"); return 1; } #ifndef WAIT_IN_CHILD wait_code (); #endif if (pthread_cancel (th) != 0) { puts ("cannot cancel 2nd thread"); return 1; } #ifdef WAIT_IN_CHILD e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); return 1; } #endif if (pthread_join (th, &r) != 0) { puts ("cannot join 2nd thread"); return 1; } if (r != PTHREAD_CANCELED) { puts ("2nd thread not canceled"); return 1; } err = pthread_join (pthread_self (), NULL); if (err == 0) { puts ("3rd circular join succeeded"); return 1; } if (err != EDEADLK) { printf ("3rd circular join %d, not EDEADLK\n", err); return 1; } return 0; }