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Diffstat (limited to '3rdparty/libuv/test/test-async.c')
-rw-r--r-- | 3rdparty/libuv/test/test-async.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/3rdparty/libuv/test/test-async.c b/3rdparty/libuv/test/test-async.c new file mode 100644 index 00000000000..6f5351bf158 --- /dev/null +++ b/3rdparty/libuv/test/test-async.c @@ -0,0 +1,134 @@ +/* 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; +} |