mirror of
https://github.com/nodejs/node.git
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135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* 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 <stdio.h>
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#include <stdlib.h>
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static uv_thread_t thread;
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static uv_mutex_t mutex;
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static uv_prepare_t prepare;
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static uv_async_t async;
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static volatile int async_cb_called;
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static int prepare_cb_called;
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static int close_cb_called;
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static void thread_cb(void *arg) {
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int n;
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int r;
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for (;;) {
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uv_mutex_lock(&mutex);
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n = async_cb_called;
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uv_mutex_unlock(&mutex);
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if (n == 3) {
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break;
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}
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r = uv_async_send(&async);
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ASSERT(r == 0);
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/* Work around a bug in Valgrind.
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*
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* Valgrind runs threads not in parallel but sequentially, i.e. one after
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* the other. It also doesn't preempt them, instead it depends on threads
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* yielding voluntarily by making a syscall.
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*
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* That never happens here: the pipe that is associated with the async
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* handle is written to once but that's too early for Valgrind's scheduler
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* to kick in. Afterwards, the thread busy-loops, starving the main thread.
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* Therefore, we yield.
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*
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* This behavior has been observed with Valgrind 3.7.0 and 3.9.0.
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*/
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uv_sleep(0);
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}
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}
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static void close_cb(uv_handle_t* handle) {
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ASSERT(handle != NULL);
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close_cb_called++;
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}
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static void async_cb(uv_async_t* handle) {
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int n;
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ASSERT(handle == &async);
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uv_mutex_lock(&mutex);
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n = ++async_cb_called;
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uv_mutex_unlock(&mutex);
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if (n == 3) {
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uv_close((uv_handle_t*)&async, close_cb);
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uv_close((uv_handle_t*)&prepare, close_cb);
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}
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}
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static void prepare_cb(uv_prepare_t* handle) {
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int r;
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ASSERT(handle == &prepare);
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if (prepare_cb_called++)
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return;
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r = uv_thread_create(&thread, thread_cb, NULL);
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ASSERT(r == 0);
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uv_mutex_unlock(&mutex);
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}
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TEST_IMPL(async) {
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int r;
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r = uv_mutex_init(&mutex);
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ASSERT(r == 0);
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uv_mutex_lock(&mutex);
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r = uv_prepare_init(uv_default_loop(), &prepare);
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ASSERT(r == 0);
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r = uv_prepare_start(&prepare, prepare_cb);
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ASSERT(r == 0);
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r = uv_async_init(uv_default_loop(), &async, async_cb);
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ASSERT(r == 0);
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r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
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ASSERT(r == 0);
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ASSERT(prepare_cb_called > 0);
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ASSERT(async_cb_called == 3);
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ASSERT(close_cb_called == 2);
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ASSERT(0 == uv_thread_join(&thread));
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MAKE_VALGRIND_HAPPY();
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return 0;
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}
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