mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-21 05:41:43 +03:00
135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* 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 n;
|
|
|
|
ASSERT(handle == &async);
|
|
|
|
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 r;
|
|
|
|
ASSERT(handle == &prepare);
|
|
|
|
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;
|
|
}
|