mojo/edk/platform/test_stopwatch.h

// Copyright 2013 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.

// A simple "stopwatch" for measuring elapsed time in tests.

#ifndef MOJO_EDK_PLATFORM_TEST_STOPWATCH_H_
#define MOJO_EDK_PLATFORM_TEST_STOPWATCH_H_

#include "mojo/public/c/system/time.h"
#include "mojo/public/cpp/system/macros.h"

namespace mojo {
namespace platform {
namespace test {

// A simple "stopwatch" for measuring time elapsed from a given starting point.
class Stopwatch final {
 public:
  Stopwatch() {}
  ~Stopwatch() {}

  void Start();
  // Returns the amount of time elapsed since the last call to |Start()| (in
  // microseconds).
  MojoDeadline Elapsed();

 private:
  MojoTimeTicks start_time_ = 0;

  MOJO_DISALLOW_COPY_AND_ASSIGN(Stopwatch);
};

}  // namespace test
}  // namespace platform
}  // namespace mojo

#endif  // MOJO_EDK_PLATFORM_TEST_STOPWATCH_H_