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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.h"
#include "base/compiler_specific.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
TEST(WaitableEventTest, ManualBasics) {
WaitableEvent event(true, false);
EXPECT_FALSE(event.IsSignaled());
event.Signal();
EXPECT_TRUE(event.IsSignaled());
EXPECT_TRUE(event.IsSignaled());
event.Reset();
EXPECT_FALSE(event.IsSignaled());
EXPECT_FALSE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
event.Signal();
event.Wait();
EXPECT_TRUE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
}
TEST(WaitableEventTest, AutoBasics) {
WaitableEvent event(false, false);
EXPECT_FALSE(event.IsSignaled());
event.Signal();
EXPECT_TRUE(event.IsSignaled());
EXPECT_FALSE(event.IsSignaled());
event.Reset();
EXPECT_FALSE(event.IsSignaled());
EXPECT_FALSE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
event.Signal();
event.Wait();
EXPECT_FALSE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
event.Signal();
EXPECT_TRUE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
}
TEST(WaitableEventTest, WaitManyShortcut) {
WaitableEvent* ev[5];
for (unsigned i = 0; i < 5; ++i)
ev[i] = new WaitableEvent(false, false);
ev[3]->Signal();
EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 3u);
ev[3]->Signal();
EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 3u);
ev[4]->Signal();
EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 4u);
ev[0]->Signal();
EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 0u);
for (unsigned i = 0; i < 5; ++i)
delete ev[i];
}
class WaitableEventSignaler : public PlatformThread::Delegate {
public:
WaitableEventSignaler(double seconds, WaitableEvent* ev)
: seconds_(seconds),
ev_(ev) {
}
virtual void ThreadMain() OVERRIDE {
PlatformThread::Sleep(TimeDelta::FromSecondsD(seconds_));
ev_->Signal();
}
private:
const double seconds_;
WaitableEvent *const ev_;
};
TEST(WaitableEventTest, WaitAndDelete) {
// This test tests that if a WaitableEvent can be safely deleted
// when |Wait| is done without additional synchrnization.
// If this test crashes, it is a bug.
WaitableEvent* ev = new WaitableEvent(false, false);
WaitableEventSignaler signaler(0.01, ev);
PlatformThreadHandle thread;
PlatformThread::Create(0, &signaler, &thread);
ev->Wait();
delete ev;
PlatformThread::Join(thread);
}
TEST(WaitableEventTest, WaitMany) {
// This test tests that if a WaitableEvent can be safely deleted
// when |WaitMany| is done without additional synchrnization.
// If this test crashes, it is a bug.
WaitableEvent* ev[5];
for (unsigned i = 0; i < 5; ++i)
ev[i] = new WaitableEvent(false, false);
WaitableEventSignaler signaler(0.01, ev[2]);
PlatformThreadHandle thread;
PlatformThread::Create(0, &signaler, &thread);
size_t index = WaitableEvent::WaitMany(ev, 5);
for (unsigned i = 0; i < 5; ++i)
delete ev[i];
PlatformThread::Join(thread);
EXPECT_EQ(2u, index);
}
} // namespace base
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