0,0 → 1,89 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
#include <test.h> |
#include <arch.h> |
#include <atomic.h> |
#include <print.h> |
#include <proc/thread.h> |
|
#include <synch/rwlock.h> |
|
#define THREADS 4 |
|
static atomic_t thread_count; |
static rwlock_t rwlock; |
|
static void reader(void *arg) |
{ |
thread_detach(THREAD); |
|
TPRINTF("cpu%u, tid %" PRIu64 ": trying to lock rwlock for reading....\n", CPU->id, THREAD->tid); |
|
rwlock_read_lock(&rwlock); |
rwlock_read_unlock(&rwlock); |
|
TPRINTF("cpu%u, tid %" PRIu64 ": success\n", CPU->id, THREAD->tid); |
TPRINTF("cpu%u, tid %" PRIu64 ": trying to lock rwlock for writing....\n", CPU->id, THREAD->tid); |
|
rwlock_write_lock(&rwlock); |
rwlock_write_unlock(&rwlock); |
|
TPRINTF("cpu%u, tid %" PRIu64 ": success\n", CPU->id, THREAD->tid); |
|
atomic_dec(&thread_count); |
} |
|
char *test_rwlock3(void) |
{ |
int i; |
thread_t *thrd; |
|
atomic_set(&thread_count, THREADS); |
|
rwlock_initialize(&rwlock); |
rwlock_write_lock(&rwlock); |
|
for (i = 0; i < THREADS; i++) { |
thrd = thread_create(reader, NULL, TASK, 0, "reader", false); |
if (thrd) |
thread_ready(thrd); |
else |
TPRINTF("Could not create reader %d\n", i); |
} |
|
thread_sleep(1); |
rwlock_write_unlock(&rwlock); |
|
while (atomic_get(&thread_count) > 0) { |
TPRINTF("Threads left: %ld\n", atomic_get(&thread_count)); |
thread_sleep(1); |
} |
|
return NULL; |
} |