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/* Test of semaphores.
Copyright (C) 2007-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#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 TF_PREPARE
TF_PREPARE
#endif
SEM_WAIT (arg);
return NULL;
}
int
do_test (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;
}
#include <support/test-driver.c>
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