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#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 {
TLS_KEYWORD int g_tls_value = 0;
TLS_KEYWORD int g_tls_values[100] =  { 0 };

class TLSThread : public Thread {
 public:
  virtual void Run() {
    ++g_tls_value;
    ++g_tls_value;
    ++g_tls_value;
    for (int i = 0; i < 100; ++i) {
      g_tls_values[i] = i;
    }
    for (int i = 0; i < 100; ++i) {
      g_tls_values[i] += i;
    }
    int result = 0;
    for (int i = 0; i < 100; ++i) {
      result += g_tls_values[i];
    }
    EXPECT_EQ(3, g_tls_value);
    EXPECT_EQ(9900, result);
  }
};
}

TEST(ThreadTest, TLSTest) {
#ifdef HAVE_TLS
  vector<TLSThread *> threads;
  for (int i = 0; i < 10; ++i) {
    threads.push_back(new TLSThread);
  }
  for (int i = 0; i < 10; ++i) {
    threads[i]->Start();
  }

  for (int i = 0; i < 10; ++i) {
    threads[i]->Join();
    delete threads[i];
  }
#endif
}

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