| 0,0 → 1,96 |
|---|
| /* |
| * 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 bool sh_quiet; |
| |
| static void reader(void *arg) |
| { |
| thread_detach(THREAD); |
| |
| if (!sh_quiet) |
| printf("cpu%u, tid %" PRIu64 ": trying to lock rwlock for reading....\n", CPU->id, THREAD->tid); |
| |
| rwlock_read_lock(&rwlock); |
| rwlock_read_unlock(&rwlock); |
| |
| if (!sh_quiet) { |
| printf("cpu%u, tid %" PRIu64 ": success\n", CPU->id, THREAD->tid); |
| printf("cpu%u, tid %" PRIu64 ": trying to lock rwlock for writing....\n", CPU->id, THREAD->tid); |
| } |
| |
| rwlock_write_lock(&rwlock); |
| rwlock_write_unlock(&rwlock); |
| |
| if (!sh_quiet) |
| printf("cpu%u, tid %" PRIu64 ": success\n", CPU->id, THREAD->tid); |
| |
| atomic_dec(&thread_count); |
| } |
| |
| char * test_rwlock3(bool quiet) |
| { |
| int i; |
| thread_t *thrd; |
| sh_quiet = quiet; |
| |
| 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 if (!quiet) |
| printf("Could not create reader %d\n", i); |
| } |
| |
| thread_sleep(1); |
| rwlock_write_unlock(&rwlock); |
| |
| while (atomic_get(&thread_count) > 0) { |
| if (!quiet) |
| printf("Threads left: %ld\n", atomic_get(&thread_count)); |
| thread_sleep(1); |
| } |
| |
| return NULL; |
| } |