127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
|
/* Test sem_wait cancellation for contended case.
|
||
|
|
Copyright (C) 2003-2022 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 <errno.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
#include <semaphore.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
|
||
|
|
static pthread_barrier_t bar;
|
||
|
|
static sem_t sem;
|
||
|
|
|
||
|
|
|
||
|
|
static void
|
||
|
|
cleanup (void *arg)
|
||
|
|
{
|
||
|
|
static int ncall;
|
||
|
|
|
||
|
|
if (++ncall != 1)
|
||
|
|
{
|
||
|
|
puts ("second call to cleanup");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static void *
|
||
|
|
tf (void *arg)
|
||
|
|
{
|
||
|
|
pthread_cleanup_push (cleanup, NULL);
|
||
|
|
|
||
|
|
int e = pthread_barrier_wait (&bar);
|
||
|
|
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
|
||
|
|
{
|
||
|
|
puts ("error: tf: 1st barrier_wait failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This call should block and be cancelable. */
|
||
|
|
sem_wait (&sem);
|
||
|
|
|
||
|
|
pthread_cleanup_pop (0);
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int
|
||
|
|
do_test (void)
|
||
|
|
{
|
||
|
|
pthread_t th;
|
||
|
|
|
||
|
|
if (pthread_barrier_init (&bar, NULL, 2) != 0)
|
||
|
|
{
|
||
|
|
puts ("error: barrier_init failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A value equal to 0 will check for contended pthread cancellation,
|
||
|
|
where the sem_wait operation will block. */
|
||
|
|
if (sem_init (&sem, 0, 0) != 0)
|
||
|
|
{
|
||
|
|
puts ("error: sem_init failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pthread_create (&th, NULL, tf, NULL) != 0)
|
||
|
|
{
|
||
|
|
puts ("error: create failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
int e = pthread_barrier_wait (&bar);
|
||
|
|
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
|
||
|
|
{
|
||
|
|
puts ("error: 1st barrier_wait failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Give the child a chance to go to sleep in sem_wait. */
|
||
|
|
sleep (1);
|
||
|
|
|
||
|
|
/* Check whether cancellation is honored when waiting in sem_wait. */
|
||
|
|
if (pthread_cancel (th) != 0)
|
||
|
|
{
|
||
|
|
puts ("error: 1st cancel failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
void *r;
|
||
|
|
if (pthread_join (th, &r) != 0)
|
||
|
|
{
|
||
|
|
puts ("error: join failed");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (r != PTHREAD_CANCELED)
|
||
|
|
{
|
||
|
|
puts ("thread not canceled");
|
||
|
|
exit (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#define TEST_FUNCTION do_test ()
|
||
|
|
#include "../test-skeleton.c"
|