// Copyright 2010-2015, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "base/thread.h"

#include <stdlib.h>

#include "base/mutex.h"
#include "base/unnamed_event.h"
#include "base/util.h"
#include "testing/base/public/gunit.h"

namespace mozc {
namespace {

class TestThread : public Thread {
 public:
  explicit TestThread(int time)
      : time_(time),
        invoked_(false) {}

  virtual void Run() {
    invoked_ = true;
    Util::Sleep(time_);
  }

  bool invoked() const {
    return invoked_;
  }
  void clear_invoked() {
    invoked_ = false;
  }

 private:
  int time_;
  bool invoked_;
};
}  // namespace

TEST(ThreadTest, BasicThreadTest) {
  {
    TestThread t(1000);
    t.Start();
    EXPECT_TRUE(t.IsRunning());
    t.Join();
    EXPECT_FALSE(t.IsRunning());
    EXPECT_TRUE(t.invoked());
  }

  {
    TestThread t(1000);
    t.clear_invoked();
    t.Start();

    Util::Sleep(3000);
    EXPECT_FALSE(t.IsRunning());
    EXPECT_TRUE(t.invoked());
    t.Join();
  }

  {
    TestThread t(3000);
    t.Start();
    Util::Sleep(1000);
    t.Terminate();
    Util::Sleep(100);
    EXPECT_FALSE(t.IsRunning());
  }
}

TEST(ThreadTest, RestartTest) {
  {
    TestThread t(1000);
    t.clear_invoked();
    t.Start();
    EXPECT_TRUE(t.IsRunning());
    t.Join();
    EXPECT_TRUE(t.invoked());
    EXPECT_FALSE(t.IsRunning());
    t.clear_invoked();
    t.Start();
    EXPECT_TRUE(t.IsRunning());
    t.Join();
    EXPECT_TRUE(t.invoked());
    EXPECT_FALSE(t.IsRunning());
    t.clear_invoked();
    t.Start();
    EXPECT_TRUE(t.IsRunning());
    t.Join();
    EXPECT_TRUE(t.invoked());
    EXPECT_FALSE(t.IsRunning());
  }
}

namespace {

class SampleDetachedThread : public DetachedThread {
 public:
  explicit SampleDetachedThread(int time, Mutex *mutex, bool *done_flag,
                                UnnamedEvent *event)
      : mutex_(mutex), time_(time), done_flag_(done_flag), event_(event) {
  }
  virtual ~SampleDetachedThread() {
    scoped_lock l(mutex_);
    *done_flag_ = true;
    event_->Notify();
  }
  virtual void Run() {
    Util::Sleep(time_);
  }

 private:
  Mutex *mutex_;
  int time_;
  bool *done_flag_;
  UnnamedEvent *event_;
};

}  // namespace

TEST(DetachedThread, SimpleTest) {
  Mutex mutex;
  UnnamedEvent event;
  bool done_flag = false;
  SampleDetachedThread *thread =
      new SampleDetachedThread(50, &mutex, &done_flag, &event);
  thread->Start();
  ASSERT_TRUE(event.Wait(-1));
  {
    scoped_lock l(&mutex);
    EXPECT_TRUE(done_flag);
  }
}

}  // namespace mozc