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/*
* Copyright 2004 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/event.h"
#include "api/units/time_delta.h"
#include "rtc_base/platform_thread.h"
#include "system_wrappers/include/clock.h"
#include "test/gtest.h"
namespace rtc {
TEST(EventTest, InitiallySignaled) {
Event event(false, true);
ASSERT_TRUE(event.Wait(webrtc::TimeDelta::Zero()));
}
TEST(EventTest, ManualReset) {
Event event(true, false);
ASSERT_FALSE(event.Wait(webrtc::TimeDelta::Zero()));
event.Set();
ASSERT_TRUE(event.Wait(webrtc::TimeDelta::Zero()));
ASSERT_TRUE(event.Wait(webrtc::TimeDelta::Zero()));
event.Reset();
ASSERT_FALSE(event.Wait(webrtc::TimeDelta::Zero()));
}
TEST(EventTest, AutoReset) {
Event event;
ASSERT_FALSE(event.Wait(webrtc::TimeDelta::Zero()));
event.Set();
ASSERT_TRUE(event.Wait(webrtc::TimeDelta::Zero()));
ASSERT_FALSE(event.Wait(webrtc::TimeDelta::Zero()));
}
class SignalerThread {
public:
void Start(Event* writer, Event* reader) {
writer_ = writer;
reader_ = reader;
thread_ = PlatformThread::SpawnJoinable(
[this] {
while (!stop_event_.Wait(webrtc::TimeDelta::Zero())) {
writer_->Set();
reader_->Wait(Event::kForever);
}
},
"EventPerf");
}
void Stop() {
stop_event_.Set();
thread_.Finalize();
}
Event stop_event_;
Event* writer_;
Event* reader_;
PlatformThread thread_;
};
TEST(EventTest, UnsignaledWaitDoesNotReturnBeforeTimeout) {
constexpr webrtc::TimeDelta kDuration = webrtc::TimeDelta::Micros(10'499);
Event event;
auto begin = webrtc::Clock::GetRealTimeClock()->CurrentTime();
EXPECT_FALSE(event.Wait(kDuration));
EXPECT_GE(webrtc::Clock::GetRealTimeClock()->CurrentTime(),
begin + kDuration);
}
// These tests are disabled by default and only intended to be run manually.
TEST(EventTest, DISABLED_PerformanceSingleThread) {
static const int kNumIterations = 10000000;
Event event;
for (int i = 0; i < kNumIterations; ++i) {
event.Set();
event.Wait(webrtc::TimeDelta::Zero());
}
}
TEST(EventTest, DISABLED_PerformanceMultiThread) {
static const int kNumIterations = 10000;
Event read;
Event write;
SignalerThread thread;
thread.Start(&read, &write);
for (int i = 0; i < kNumIterations; ++i) {
write.Set();
read.Wait(Event::kForever);
}
write.Set();
thread.Stop();
}
#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
// Tests that we crash if we attempt to call rtc::Event::Wait while we're
// not allowed to (as per `RTC_DISALLOW_WAIT()`).
TEST(EventTestDeathTest, DisallowEventWait) {
Event event;
RTC_DISALLOW_WAIT();
EXPECT_DEATH(event.Wait(Event::kForever), "");
}
#endif // RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
} // namespace rtc
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