Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/nptl/tst-rwlock8.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
163 lines (125 sloc)
3.44 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Test program for timedout read/write lock functions. | |
Copyright (C) 2000-2016 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" |