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-rw-r--r--3rdparty/libuv/test/test-async.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/3rdparty/libuv/test/test-async.c b/3rdparty/libuv/test/test-async.c
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+++ b/3rdparty/libuv/test/test-async.c
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+/* 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;
+}