| /* 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; |
| } |