libuv-svace-build

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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to
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 * deal in the Software without restriction, including without limitation the
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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 * sell copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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 * IN THE SOFTWARE.
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 */
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#include "uv.h"
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#include "task.h"
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#include <stdlib.h>
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#include <string.h>
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typedef struct {
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  uv_mutex_t mutex;
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  uv_sem_t sem;
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  int delay;
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  volatile int posted;
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} worker_config;
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static void worker(void* arg) {
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  worker_config* c = arg;
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  if (c->delay)
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    uv_sleep(c->delay);
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  uv_mutex_lock(&c->mutex);
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  ASSERT_OK(c->posted);
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  uv_sem_post(&c->sem);
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  c->posted = 1;
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  uv_mutex_unlock(&c->mutex);
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}
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TEST_IMPL(semaphore_1) {
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  uv_thread_t thread;
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  worker_config wc;
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  memset(&wc, 0, sizeof(wc));
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  ASSERT_OK(uv_sem_init(&wc.sem, 0));
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  ASSERT_OK(uv_mutex_init(&wc.mutex));
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  ASSERT_OK(uv_thread_create(&thread, worker, &wc));
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  uv_sleep(100);
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  uv_mutex_lock(&wc.mutex);
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  ASSERT_EQ(1, wc.posted);
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  uv_sem_wait(&wc.sem); /* should not block */
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  uv_mutex_unlock(&wc.mutex); /* ergo, it should be ok to unlock after wait */
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  ASSERT_OK(uv_thread_join(&thread));
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  uv_mutex_destroy(&wc.mutex);
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  uv_sem_destroy(&wc.sem);
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  return 0;
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}
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TEST_IMPL(semaphore_2) {
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  uv_thread_t thread;
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  worker_config wc;
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  memset(&wc, 0, sizeof(wc));
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  wc.delay = 100;
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  ASSERT_OK(uv_sem_init(&wc.sem, 0));
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  ASSERT_OK(uv_mutex_init(&wc.mutex));
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  ASSERT_OK(uv_thread_create(&thread, worker, &wc));
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  uv_sem_wait(&wc.sem);
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  ASSERT_OK(uv_thread_join(&thread));
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  uv_mutex_destroy(&wc.mutex);
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  uv_sem_destroy(&wc.sem);
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  return 0;
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}
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TEST_IMPL(semaphore_3) {
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  uv_sem_t sem;
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  ASSERT_OK(uv_sem_init(&sem, 3));
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  uv_sem_wait(&sem); /* should not block */
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  uv_sem_wait(&sem); /* should not block */
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  ASSERT_OK(uv_sem_trywait(&sem));
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  ASSERT_EQ(UV_EAGAIN, uv_sem_trywait(&sem));
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  uv_sem_post(&sem);
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  ASSERT_OK(uv_sem_trywait(&sem));
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  ASSERT_EQ(UV_EAGAIN, uv_sem_trywait(&sem));
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  uv_sem_destroy(&sem);
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  return 0;
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}
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