93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/file.h>
|
|
|
|
|
|
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
static int fd;
|
|
|
|
|
|
static void *
|
|
tf (void *arg)
|
|
{
|
|
if (flock (fd, LOCK_SH | LOCK_NB) != 0)
|
|
{
|
|
puts ("second flock failed");
|
|
exit (1);
|
|
}
|
|
|
|
pthread_mutex_unlock (&lock);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
char tmp[] = "/tmp/tst-flock1-XXXXXX";
|
|
|
|
fd = mkstemp (tmp);
|
|
if (fd == -1)
|
|
{
|
|
puts ("mkstemp failed");
|
|
exit (1);
|
|
}
|
|
|
|
unlink (tmp);
|
|
|
|
write (fd, "foobar xyzzy", 12);
|
|
|
|
if (flock (fd, LOCK_EX | LOCK_NB) != 0)
|
|
{
|
|
puts ("first flock failed");
|
|
exit (1);
|
|
}
|
|
|
|
pthread_mutex_lock (&lock);
|
|
|
|
pthread_t th;
|
|
if (pthread_create (&th, NULL, tf, NULL) != 0)
|
|
{
|
|
puts ("pthread_create failed");
|
|
exit (1);
|
|
}
|
|
|
|
pthread_mutex_lock (&lock);
|
|
|
|
void *result;
|
|
if (pthread_join (th, &result) != 0)
|
|
{
|
|
puts ("pthread_join failed");
|
|
exit (1);
|
|
}
|
|
|
|
close (fd);
|
|
|
|
return result != NULL;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|