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glibc/nptl/tst-sem11.c
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#include <semaphore.h> | |
#include <stdio.h> | |
#include <unistd.h> | |
#include <pthread.h> | |
#include <internaltypes.h> | |
#ifndef SEM_WAIT | |
# define SEM_WAIT(s) sem_wait (s) | |
#endif | |
static void * | |
tf (void *arg) | |
{ | |
#ifdef PREPARE | |
PREPARE | |
#endif | |
SEM_WAIT (arg); | |
return NULL; | |
} | |
int | |
main (void) | |
{ | |
int tries = 5; | |
pthread_t th; | |
union | |
{ | |
sem_t s; | |
struct new_sem ns; | |
} u; | |
again: | |
if (sem_init (&u.s, 0, 0) != 0) | |
{ | |
puts ("sem_init failed"); | |
return 1; | |
} | |
#if __HAVE_64B_ATOMICS | |
if ((u.ns.data >> SEM_NWAITERS_SHIFT) != 0) | |
#else | |
if (u.ns.nwaiters != 0) | |
#endif | |
{ | |
puts ("nwaiters not initialized"); | |
return 1; | |
} | |
if (pthread_create (&th, NULL, tf, &u.s) != 0) | |
{ | |
puts ("pthread_create failed"); | |
return 1; | |
} | |
sleep (1); | |
if (pthread_cancel (th) != 0) | |
{ | |
puts ("pthread_cancel failed"); | |
return 1; | |
} | |
void *r; | |
if (pthread_join (th, &r) != 0) | |
{ | |
puts ("pthread_join failed"); | |
return 1; | |
} | |
if (r != PTHREAD_CANCELED && --tries > 0) | |
{ | |
/* Maybe we get the scheduling right the next time. */ | |
sem_destroy (&u.s); | |
goto again; | |
} | |
#if __HAVE_64B_ATOMICS | |
if ((u.ns.data >> SEM_NWAITERS_SHIFT) != 0) | |
#else | |
if (u.ns.nwaiters != 0) | |
#endif | |
{ | |
puts ("nwaiters not reset"); | |
return 1; | |
} | |
return 0; | |
} |