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Diffstat (limited to 'nptl/tst-rwlock16.c')
| -rw-r--r-- | nptl/tst-rwlock16.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/nptl/tst-rwlock16.c b/nptl/tst-rwlock16.c deleted file mode 100644 index d19293198a..0000000000 --- a/nptl/tst-rwlock16.c +++ /dev/null @@ -1,183 +0,0 @@ -/* Copyright (C) 2015-2017 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 - <http://www.gnu.org/licenses/>. */ - -/* This tests that with a reader-preferring rwlock, all readers are woken if - one reader "steals" lock ownership from a blocked writer. */ - -#include <errno.h> -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include <semaphore.h> -#include <unistd.h> - -/* If we strictly prefer writers over readers, a program must not expect - that, in the presence of concurrent writers, one reader will also acquire - the lock when another reader has already done so. Thus, use the - default rwlock type that does not strictly prefer writers. */ -static pthread_rwlock_t r = PTHREAD_RWLOCK_INITIALIZER; - -static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER; -static pthread_cond_t cv = PTHREAD_COND_INITIALIZER; - -/* Avoid using glibc-internal atomic operations. */ -static sem_t stop; -static int consumer_stop = 0; - -static void * -writer (void *arg) -{ - int s; - - do - { - if (pthread_rwlock_wrlock (&r) != 0) - { - puts ("wrlock failed"); - exit (EXIT_FAILURE); - } - if (pthread_rwlock_unlock (&r) != 0) - { - puts ("unlock failed"); - exit (EXIT_FAILURE); - } - sem_getvalue (&stop, &s); - } - while (s == 0); - return NULL; -} - -static void * -reader_producer (void *arg) -{ - int s; - - do - { - if (pthread_rwlock_rdlock (&r) != 0) - { - puts ("rdlock reader failed"); - exit (EXIT_FAILURE); - } - - sem_getvalue (&stop, &s); - - pthread_mutex_lock (&m); - if (s != 0) - consumer_stop = 1; - pthread_cond_signal (&cv); - pthread_mutex_unlock (&m); - - if (pthread_rwlock_unlock (&r) != 0) - { - puts ("unlock reader failed"); - exit (EXIT_FAILURE); - } - } - while (s == 0); - puts ("producer finished"); - return NULL; -} - -static void * -reader_consumer (void *arg) -{ - int s; - - do - { - if (pthread_rwlock_rdlock (&r) != 0) - { - puts ("rdlock reader failed"); - exit (EXIT_FAILURE); - } - - pthread_mutex_lock (&m); - s = consumer_stop; - if (s == 0) - pthread_cond_wait (&cv, &m); - pthread_mutex_unlock (&m); - - if (pthread_rwlock_unlock (&r) != 0) - { - puts ("unlock reader failed"); - exit (EXIT_FAILURE); - } - } - while (s == 0); - puts ("consumer finished"); - return NULL; -} - - -static int -do_test (void) -{ - pthread_t w1, w2, rp, rc; - - if (pthread_create (&w1, NULL, writer, NULL) != 0) - { - puts ("create failed"); - return 1; - } - if (pthread_create (&w2, NULL, writer, NULL) != 0) - { - puts ("create failed"); - return 1; - } - if (pthread_create (&rc, NULL, reader_consumer, NULL) != 0) - { - puts ("create failed"); - return 1; - } - if (pthread_create (&rp, NULL, reader_producer, NULL) != 0) - { - puts ("create failed"); - return 1; - } - - sleep (2); - sem_post (&stop); - - if (pthread_join (w1, NULL) != 0) - { - puts ("w1 join failed"); - return 1; - } - if (pthread_join (w2, NULL) != 0) - { - puts ("w2 join failed"); - return 1; - } - if (pthread_join (rp, NULL) != 0) - { - puts ("reader_producer join failed"); - return 1; - } - if (pthread_join (rc, NULL) != 0) - { - puts ("reader_consumer join failed"); - return 1; - } - - return 0; -} - - -#define TIMEOUT 3 -#define TEST_FUNCTION do_test () -#include "../test-skeleton.c" |