/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "uv.h"
#include "task.h"
#include <stdio.h>
#include <stdlib.h>
static uv_thread_t thread;
static uv_mutex_t mutex;
static uv_prepare_t prepare;
static uv_async_t async;
static volatile int async_cb_called;
static int prepare_cb_called;
static int close_cb_called;
static void thread_cb(void *arg) {
int n;
int r;
for (;;) {
uv_mutex_lock(&mutex);
n = async_cb_called;
uv_mutex_unlock(&mutex);
if (n == 3) {
break;
}
r = uv_async_send(&async);
ASSERT(r == 0);
/* Work around a bug in Valgrind.
*
* Valgrind runs threads not in parallel but sequentially, i.e. one after
* the other. It also doesn't preempt them, instead it depends on threads
* yielding voluntarily by making a syscall.
*
* That never happens here: the pipe that is associated with the async
* handle is written to once but that's too early for Valgrind's scheduler
* to kick in. Afterwards, the thread busy-loops, starving the main thread.
* Therefore, we yield.
*
* This behavior has been observed with Valgrind 3.7.0 and 3.9.0.
*/
uv_sleep(0);
}
}
static void close_cb(uv_handle_t* handle) {
ASSERT(handle != NULL);
close_cb_called++;
}
static void async_cb(uv_async_t* handle, int status) {
int n;
ASSERT(handle == &async);
ASSERT(status == 0);
uv_mutex_lock(&mutex);
n = ++async_cb_called;
uv_mutex_unlock(&mutex);
if (n == 3) {
uv_close((uv_handle_t*)&async, close_cb);
uv_close((uv_handle_t*)&prepare, close_cb);
}
}
static void prepare_cb(uv_prepare_t* handle, int status) {
int r;
ASSERT(handle == &prepare);
ASSERT(status == 0);
if (prepare_cb_called++)
return;
r = uv_thread_create(&thread, thread_cb, NULL);
ASSERT(r == 0);
uv_mutex_unlock(&mutex);
}
TEST_IMPL(async) {
int r;
r = uv_mutex_init(&mutex);
ASSERT(r == 0);
uv_mutex_lock(&mutex);
r = uv_prepare_init(uv_default_loop(), &prepare);
ASSERT(r == 0);
r = uv_prepare_start(&prepare, prepare_cb);
ASSERT(r == 0);
r = uv_async_init(uv_default_loop(), &async, async_cb);
ASSERT(r == 0);
r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
ASSERT(r == 0);
ASSERT(prepare_cb_called > 0);
ASSERT(async_cb_called == 3);
ASSERT(close_cb_called == 2);
ASSERT(0 == uv_thread_join(&thread));
MAKE_VALGRIND_HAPPY();
return 0;
}