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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/test/test_waitable_event.h"
#include "base/functional/bind.h"
#include "base/task/thread_pool.h"
#include "base/test/task_environment.h"
#include "base/threading/scoped_blocking_call_internal.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
class NoInvokeBlockingObserver : public internal::BlockingObserver {
public:
void BlockingStarted(BlockingType blocking_type) override { ADD_FAILURE(); }
void BlockingTypeUpgraded() override { ADD_FAILURE(); }
void BlockingEnded() override { ADD_FAILURE(); }
};
TEST(TestWaitableEvent, NoBlockingCall) {
test::TaskEnvironment task_environment;
NoInvokeBlockingObserver test_observer;
internal::SetBlockingObserverForCurrentThread(&test_observer);
TestWaitableEvent test_waitable_event;
ThreadPool::PostTask(
FROM_HERE, {},
BindOnce(&WaitableEvent::Signal, Unretained(&test_waitable_event)));
test_waitable_event.Wait();
internal::ClearBlockingObserverForCurrentThread();
}
TEST(TestWaitableEvent, WaitingInPoolDoesntRequireAllowance) {
test::TaskEnvironment task_environment;
TestWaitableEvent test_waitable_event;
// MayBlock()/WithBaseSyncPrimitives()/ScopedAllowBaseSyncPrimitivesForTesting
// are required to Wait() on a TestWaitableEvent.
ThreadPool::PostTask(
FROM_HERE, {},
BindOnce(&WaitableEvent::Wait, Unretained(&test_waitable_event)));
test_waitable_event.Signal();
task_environment.RunUntilIdle();
}
// Binding &WaitableEvent::Signal or &TestWaitableEvent::Signal is equivalent.
TEST(TestWaitableEvent, CanBindEitherType) {
test::TaskEnvironment task_environment;
TestWaitableEvent test_waitable_event(WaitableEvent::ResetPolicy::AUTOMATIC);
ThreadPool::PostTask(
FROM_HERE, {},
BindOnce(&WaitableEvent::Signal, Unretained(&test_waitable_event)));
test_waitable_event.Wait();
ThreadPool::PostTask(
FROM_HERE, {},
BindOnce(&TestWaitableEvent::Signal, Unretained(&test_waitable_event)));
test_waitable_event.Wait();
}
} // namespace base
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