164 lines
3.4 KiB
C
164 lines
3.4 KiB
C
/* Test program for timedout read/write lock functions.
|
|
Copyright (C) 2000-2013 Free Software Foundation, Inc.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
|
|
|
|
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; see the file COPYING.LIB. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <error.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
|
|
#define NWRITERS 15
|
|
#define WRITETRIES 10
|
|
#define NREADERS 15
|
|
#define READTRIES 15
|
|
|
|
#define DELAY 1000000
|
|
|
|
#ifndef INIT
|
|
# define INIT PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
|
|
#endif
|
|
|
|
static pthread_rwlock_t lock = INIT;
|
|
|
|
|
|
static void *
|
|
writer_thread (void *nr)
|
|
{
|
|
struct timespec delay;
|
|
int n;
|
|
|
|
delay.tv_sec = 0;
|
|
delay.tv_nsec = DELAY;
|
|
|
|
for (n = 0; n < WRITETRIES; ++n)
|
|
{
|
|
printf ("writer thread %ld tries again\n", (long int) nr);
|
|
|
|
if (pthread_rwlock_wrlock (&lock) != 0)
|
|
{
|
|
puts ("wrlock failed");
|
|
exit (1);
|
|
}
|
|
|
|
printf ("writer thread %ld succeeded\n", (long int) nr);
|
|
|
|
nanosleep (&delay, NULL);
|
|
|
|
if (pthread_rwlock_unlock (&lock) != 0)
|
|
{
|
|
puts ("unlock for writer failed");
|
|
exit (1);
|
|
}
|
|
|
|
printf ("writer thread %ld released\n", (long int) nr);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void *
|
|
reader_thread (void *nr)
|
|
{
|
|
struct timespec delay;
|
|
int n;
|
|
|
|
delay.tv_sec = 0;
|
|
delay.tv_nsec = DELAY;
|
|
|
|
for (n = 0; n < READTRIES; ++n)
|
|
{
|
|
printf ("reader thread %ld tries again\n", (long int) nr);
|
|
|
|
if (pthread_rwlock_rdlock (&lock) != 0)
|
|
{
|
|
puts ("rdlock failed");
|
|
exit (1);
|
|
}
|
|
|
|
printf ("reader thread %ld succeeded\n", (long int) nr);
|
|
|
|
nanosleep (&delay, NULL);
|
|
|
|
if (pthread_rwlock_unlock (&lock) != 0)
|
|
{
|
|
puts ("unlock for reader failed");
|
|
exit (1);
|
|
}
|
|
|
|
printf ("reader thread %ld released\n", (long int) nr);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
pthread_t thwr[NWRITERS];
|
|
pthread_t thrd[NREADERS];
|
|
int n;
|
|
void *res;
|
|
|
|
/* Make standard error the same as standard output. */
|
|
dup2 (1, 2);
|
|
|
|
/* Make sure we see all message, even those on stdout. */
|
|
setvbuf (stdout, NULL, _IONBF, 0);
|
|
|
|
for (n = 0; n < NWRITERS; ++n)
|
|
if (pthread_create (&thwr[n], NULL, writer_thread,
|
|
(void *) (long int) n) != 0)
|
|
{
|
|
puts ("writer create failed");
|
|
exit (1);
|
|
}
|
|
|
|
for (n = 0; n < NREADERS; ++n)
|
|
if (pthread_create (&thrd[n], NULL, reader_thread,
|
|
(void *) (long int) n) != 0)
|
|
{
|
|
puts ("reader create failed");
|
|
exit (1);
|
|
}
|
|
|
|
/* Wait for all the threads. */
|
|
for (n = 0; n < NWRITERS; ++n)
|
|
if (pthread_join (thwr[n], &res) != 0)
|
|
{
|
|
puts ("writer join failed");
|
|
exit (1);
|
|
}
|
|
for (n = 0; n < NREADERS; ++n)
|
|
if (pthread_join (thrd[n], &res) != 0)
|
|
{
|
|
puts ("reader join failed");
|
|
exit (1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TIMEOUT 30
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|