// Copyright 2008, Google Inc.
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//
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// 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.
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// this software without specific prior written permission.
//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "base/lock.h"
#include "base/message_loop.h"
#include "base/string_util.h"
#include "base/thread.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace {

class ToggleValue : public Task {
 public:
  explicit ToggleValue(bool* value) : value_(value) {
  }
  virtual void Run() {
    *value_ = !*value_;
  }
 private:
  bool* value_;
};

class SleepSome : public Task {
 public:
  explicit SleepSome(int msec) : msec_(msec) {
  }
  virtual void Run() {
    Sleep(msec_);
  }
 private:
  int msec_;
};

}  // namespace

TEST(ThreadTest, Restart) {
  Thread a("Restart");
  a.Stop();
  EXPECT_FALSE(a.message_loop());
  EXPECT_TRUE(a.Start());
  EXPECT_TRUE(a.message_loop());
  a.Stop();
  EXPECT_FALSE(a.message_loop());
  EXPECT_TRUE(a.Start());
  EXPECT_TRUE(a.message_loop());
  a.Stop();
  EXPECT_FALSE(a.message_loop());
  a.Stop();
  EXPECT_FALSE(a.message_loop());
}

TEST(ThreadTest, StartWithStackSize) {
  Thread a("StartWithStackSize");
  // Ensure that the thread can work with only 12 kb and still process a
  // message.
  EXPECT_TRUE(a.StartWithStackSize(12*1024));
  EXPECT_TRUE(a.message_loop());

  bool was_invoked = false;
  a.message_loop()->PostTask(FROM_HERE, new ToggleValue(&was_invoked));

  // wait for the task to run (we could use a kernel event here
  // instead to avoid busy waiting, but this is sufficient for
  // testing purposes).
  for (int i = 100; i >= 0 && !was_invoked; --i) {
    Sleep(10);
  }
  EXPECT_TRUE(was_invoked);
}

TEST(ThreadTest, TwoTasks) {
  bool was_invoked = false;
  {
    Thread a("TwoTasks");
    EXPECT_TRUE(a.Start());
    EXPECT_TRUE(a.message_loop());

    // Test that all events are dispatched before the Thread object is
    // destroyed.  We do this by dispatching a sleep event before the
    // event that will toggle our sentinel value.
    a.message_loop()->PostTask(FROM_HERE, new SleepSome(20));
    a.message_loop()->PostTask(FROM_HERE, new ToggleValue(&was_invoked));
  }
  EXPECT_TRUE(was_invoked);
}

TEST(ThreadTest, StopSoon) {
  Thread a("StopSoon");
  EXPECT_TRUE(a.Start());
  EXPECT_TRUE(a.message_loop());
  a.StopSoon();
  EXPECT_FALSE(a.message_loop());
  a.StopSoon();
  EXPECT_FALSE(a.message_loop());
}

TEST(ThreadTest, ThreadName) {
  Thread a("ThreadName");
  EXPECT_TRUE(a.Start());
  EXPECT_EQ("ThreadName", a.thread_name());
}