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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/synchronization/waitable_event_watcher.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/platform_thread.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
// The message loops on which each waitable event timer should be tested.
const MessageLoop::Type testing_message_loops[] = {
MessageLoop::TYPE_DEFAULT,
MessageLoop::TYPE_IO,
#if !defined(OS_IOS) // iOS does not allow direct running of the UI loop.
MessageLoop::TYPE_UI,
#endif
};
const int kNumTestingMessageLoops = arraysize(testing_message_loops);
void QuitWhenSignaled(WaitableEvent* event) {
MessageLoop::current()->QuitWhenIdle();
}
class DecrementCountContainer {
public:
explicit DecrementCountContainer(int* counter) : counter_(counter) {
}
void OnWaitableEventSignaled(WaitableEvent* object) {
--(*counter_);
}
private:
int* counter_;
};
void RunTest_BasicSignal(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
// A manual-reset event that is not yet signaled.
WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL,
WaitableEvent::InitialState::NOT_SIGNALED);
WaitableEventWatcher watcher;
EXPECT_TRUE(watcher.GetWatchedEvent() == NULL);
watcher.StartWatching(&event, Bind(&QuitWhenSignaled));
EXPECT_EQ(&event, watcher.GetWatchedEvent());
event.Signal();
RunLoop().Run();
EXPECT_TRUE(watcher.GetWatchedEvent() == NULL);
}
void RunTest_BasicCancel(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
// A manual-reset event that is not yet signaled.
WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL,
WaitableEvent::InitialState::NOT_SIGNALED);
WaitableEventWatcher watcher;
watcher.StartWatching(&event, Bind(&QuitWhenSignaled));
watcher.StopWatching();
}
void RunTest_CancelAfterSet(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
// A manual-reset event that is not yet signaled.
WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL,
WaitableEvent::InitialState::NOT_SIGNALED);
WaitableEventWatcher watcher;
int counter = 1;
DecrementCountContainer delegate(&counter);
WaitableEventWatcher::EventCallback callback =
Bind(&DecrementCountContainer::OnWaitableEventSignaled,
Unretained(&delegate));
watcher.StartWatching(&event, callback);
event.Signal();
// Let the background thread do its business
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(30));
watcher.StopWatching();
RunLoop().RunUntilIdle();
// Our delegate should not have fired.
EXPECT_EQ(1, counter);
}
void RunTest_OutlivesMessageLoop(MessageLoop::Type message_loop_type) {
// Simulate a MessageLoop that dies before an WaitableEventWatcher. This
// ordinarily doesn't happen when people use the Thread class, but it can
// happen when people use the Singleton pattern or atexit.
WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL,
WaitableEvent::InitialState::NOT_SIGNALED);
{
WaitableEventWatcher watcher;
{
MessageLoop message_loop(message_loop_type);
watcher.StartWatching(&event, Bind(&QuitWhenSignaled));
}
}
}
void RunTest_DeleteUnder(MessageLoop::Type message_loop_type) {
// Delete the WaitableEvent out from under the Watcher. This is explictly
// allowed by the interface.
MessageLoop message_loop(message_loop_type);
{
WaitableEventWatcher watcher;
WaitableEvent* event =
new WaitableEvent(WaitableEvent::ResetPolicy::AUTOMATIC,
WaitableEvent::InitialState::NOT_SIGNALED);
watcher.StartWatching(event, Bind(&QuitWhenSignaled));
delete event;
}
}
} // namespace
//-----------------------------------------------------------------------------
TEST(WaitableEventWatcherTest, BasicSignal) {
for (int i = 0; i < kNumTestingMessageLoops; i++) {
RunTest_BasicSignal(testing_message_loops[i]);
}
}
TEST(WaitableEventWatcherTest, BasicCancel) {
for (int i = 0; i < kNumTestingMessageLoops; i++) {
RunTest_BasicCancel(testing_message_loops[i]);
}
}
TEST(WaitableEventWatcherTest, CancelAfterSet) {
for (int i = 0; i < kNumTestingMessageLoops; i++) {
RunTest_CancelAfterSet(testing_message_loops[i]);
}
}
TEST(WaitableEventWatcherTest, OutlivesMessageLoop) {
for (int i = 0; i < kNumTestingMessageLoops; i++) {
RunTest_OutlivesMessageLoop(testing_message_loops[i]);
}
}
#if defined(OS_WIN)
// Crashes sometimes on vista. http://crbug.com/62119
#define MAYBE_DeleteUnder DISABLED_DeleteUnder
#else
#define MAYBE_DeleteUnder DeleteUnder
#endif
TEST(WaitableEventWatcherTest, MAYBE_DeleteUnder) {
for (int i = 0; i < kNumTestingMessageLoops; i++) {
RunTest_DeleteUnder(testing_message_loops[i]);
}
}
} // namespace base
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