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/*
* Copyright 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/synchronization/yield_policy.h"
#include <thread> // Not allowed in production per Chromium style guide.
#include "rtc_base/event.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
class MockYieldHandler : public YieldInterface {
public:
MOCK_METHOD(void, YieldExecution, (), (override));
};
} // namespace
TEST(YieldPolicyTest, HandlerReceivesYieldSignalWhenSet) {
::testing::StrictMock<MockYieldHandler> handler;
{
Event event;
EXPECT_CALL(handler, YieldExecution()).Times(1);
ScopedYieldPolicy policy(&handler);
event.Set();
event.Wait(Event::kForever);
}
{
Event event;
EXPECT_CALL(handler, YieldExecution()).Times(0);
event.Set();
event.Wait(Event::kForever);
}
}
TEST(YieldPolicyTest, IsThreadLocal) {
Event events[3];
std::thread other_thread([&]() {
::testing::StrictMock<MockYieldHandler> local_handler;
// The local handler is never called as we never Wait on this thread.
EXPECT_CALL(local_handler, YieldExecution()).Times(0);
ScopedYieldPolicy policy(&local_handler);
events[0].Set();
events[1].Set();
events[2].Set();
});
// Waiting until the other thread has entered the scoped policy.
events[0].Wait(Event::kForever);
// Wait on this thread should not trigger the handler of that policy as it's
// thread local.
events[1].Wait(Event::kForever);
// We can set a policy that's active on this thread independently.
::testing::StrictMock<MockYieldHandler> main_handler;
EXPECT_CALL(main_handler, YieldExecution()).Times(1);
ScopedYieldPolicy policy(&main_handler);
events[2].Wait(Event::kForever);
other_thread.join();
}
} // namespace webrtc
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