| /**************************************************************************** |
| * apps/testing/ostest/pthread_rwlock_cancel.c |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <pthread.h> |
| #include <sched.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| /**************************************************************************** |
| * Private Types |
| ****************************************************************************/ |
| |
| struct sync_s |
| { |
| pthread_rwlock_t *read_lock; |
| pthread_rwlock_t *write_lock; |
| }; |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| static FAR void *timeout_thread1(FAR void *data) |
| { |
| FAR struct sync_s *sync = (FAR struct sync_s *)data; |
| struct timespec time; |
| int status; |
| |
| while (1) |
| { |
| clock_gettime(CLOCK_REALTIME, &time); |
| time.tv_sec += 1; |
| |
| status = pthread_rwlock_timedrdlock(sync->write_lock, &time); |
| if (status != ETIMEDOUT) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR Acquired held write_lock. Status: %d\n", status); |
| ASSERT(false); |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static FAR void *timeout_thread2(FAR void *data) |
| { |
| FAR struct sync_s *sync = (FAR struct sync_s *)data; |
| struct timespec time; |
| int status; |
| |
| while (1) |
| { |
| clock_gettime(CLOCK_REALTIME, &time); |
| time.tv_sec += 1; |
| |
| status = pthread_rwlock_timedrdlock(sync->read_lock, &time); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR Failed to acquire read_lock. Status: %d\n", status); |
| ASSERT(false); |
| } |
| |
| sched_yield(); /* Not a cancellation point. */ |
| |
| if (status == 0) |
| { |
| status = pthread_rwlock_unlock(sync->read_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR Failed to release read_lock. Status: %d\n", |
| status); |
| ASSERT(false); |
| } |
| } |
| |
| clock_gettime(CLOCK_REALTIME, &time); |
| time.tv_sec += 1; |
| |
| status = pthread_rwlock_timedwrlock(sync->read_lock, &time); |
| if (status != ETIMEDOUT) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR Acquired held read_lock for writing." |
| " Status: %d\n", status); |
| ASSERT(false); |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static void test_timeout(void) |
| { |
| pthread_rwlock_t read_lock; |
| pthread_rwlock_t write_lock; |
| struct sync_s sync; |
| pthread_t thread1; |
| pthread_t thread2; |
| int status; |
| int i; |
| |
| status = pthread_rwlock_init(&read_lock, NULL); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_init(read_lock), status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_init(&write_lock, NULL); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_init(write_lock), status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_rdlock(&read_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_rdlock, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_wrlock(&write_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_wrlock, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| sync.read_lock = &read_lock; |
| sync.write_lock = &write_lock; |
| |
| status = pthread_create(&thread1, NULL, timeout_thread1, &sync); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_create, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_create(&thread2, NULL, timeout_thread2, &sync); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_create, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| for (i = 0; i < 10; i++) |
| { |
| usleep(300 * 1000); /* Give threads few seconds to run */ |
| } |
| |
| status = pthread_cancel(thread1); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_cancel, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_cancel(thread2); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_cancel, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| pthread_join(thread1, NULL); |
| pthread_join(thread2, NULL); |
| |
| /* Do some operations on locks in order to check if they are still in |
| * usable state after deferred cancellation. |
| */ |
| |
| #if CONFIG_PTHREAD_CLEANUP_STACKSIZE > 0 && defined(CONFIG_CANCELLATION_POINTS) |
| status = pthread_rwlock_trywrlock(&write_lock); |
| if (status != EBUSY) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR able to acquire write lock when write lock already " |
| "acquired, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_tryrdlock(&write_lock); |
| if (status != EBUSY) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR able to acquire read lock when write lock already " |
| "acquired, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_unlock(&read_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_unlock, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_unlock(&write_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_unlock, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_rdlock(&read_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_rdlock, status=%d\n", status); |
| ASSERT(false); |
| } |
| |
| status = pthread_rwlock_wrlock(&write_lock); |
| if (status != 0) |
| { |
| printf("pthread_rwlock_cancel: " |
| "ERROR pthread_rwlock_wrlock, status=%d\n", status); |
| ASSERT(false); |
| } |
| #endif /* CONFIG_PTHREAD_CLEANUP_STACKSIZE > 0 && CONFIG_CANCELLATION_POINTS */ |
| |
| pthread_rwlock_destroy(&write_lock); |
| pthread_rwlock_destroy(&read_lock); |
| } |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| void pthread_rwlock_cancel_test(void) |
| { |
| printf("pthread_rwlock_cancel: Starting test\n"); |
| test_timeout(); |
| } |