| 0,0 → 1,117 |
|---|
| /* |
| * 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/waitq.h> |
| #include <synch/rwlock.h> |
| |
| #define READERS 50 |
| #define WRITERS 50 |
| |
| static rwlock_t rwlock; |
| |
| static waitq_t can_start; |
| static atomic_t items_read; |
| static atomic_t items_written; |
| |
| static void writer(void *arg) |
| { |
| thread_detach(THREAD); |
| |
| waitq_sleep(&can_start); |
| |
| rwlock_write_lock(&rwlock); |
| atomic_inc(&items_written); |
| rwlock_write_unlock(&rwlock); |
| } |
| |
| static void reader(void *arg) |
| { |
| thread_detach(THREAD); |
| |
| waitq_sleep(&can_start); |
| |
| rwlock_read_lock(&rwlock); |
| atomic_inc(&items_read); |
| rwlock_read_unlock(&rwlock); |
| } |
| |
| char * test_rwlock5(bool quiet) |
| { |
| int i, j, k; |
| long readers, writers; |
| |
| waitq_initialize(&can_start); |
| rwlock_initialize(&rwlock); |
| |
| for (i = 1; i <= 3; i++) { |
| thread_t *thrd; |
| |
| atomic_set(&items_read, 0); |
| atomic_set(&items_written, 0); |
| |
| readers = i * READERS; |
| writers = (4 - i) * WRITERS; |
| |
| printf("Creating %ld readers and %ld writers...", readers, writers); |
| |
| for (j = 0; j < (READERS + WRITERS) / 2; j++) { |
| for (k = 0; k < i; k++) { |
| thrd = thread_create(reader, NULL, TASK, 0, "reader", false); |
| if (thrd) |
| thread_ready(thrd); |
| else |
| printf("Could not create reader %d\n", k); |
| } |
| for (k = 0; k < (4 - i); k++) { |
| thrd = thread_create(writer, NULL, TASK, 0, "writer", false); |
| if (thrd) |
| thread_ready(thrd); |
| else |
| printf("Could not create writer %d\n", k); |
| } |
| } |
| |
| printf("ok\n"); |
| |
| thread_sleep(1); |
| waitq_wakeup(&can_start, WAKEUP_ALL); |
| |
| while ((items_read.count != readers) || (items_written.count != writers)) { |
| printf("%d readers remaining, %d writers remaining, readers_in=%d\n", readers - items_read.count, writers - items_written.count, rwlock.readers_in); |
| thread_usleep(100000); |
| } |
| } |
| |
| return NULL; |
| } |