Stopwatch.h

Go to the documentation of this file.

/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

#ifndef ALEXA_CLIENT_SDK_AVSCOMMON_UTILS_INCLUDE_AVSCOMMON_UTILS_TIMING_STOPWATCH_H_
#define ALEXA_CLIENT_SDK_AVSCOMMON_UTILS_INCLUDE_AVSCOMMON_UTILS_TIMING_STOPWATCH_H_

#include <chrono>
#include <mutex>
#include <thread>

namespace alexaClientSDK {
namespace avsCommon {
namespace utils {
namespace timing {

class Stopwatch {
public:
    Stopwatch();

    bool start();

    bool pause();

    bool resume();

    void stop();

    void reset();

    std::chrono::milliseconds getElapsed();

private:
    enum class State {
        RESET,
        RUNNING,
        PAUSED,
        STOPPED
    };

    std::mutex m_mutex;

    State m_state;

    std::chrono::steady_clock::time_point m_startTime;

    std::chrono::steady_clock::time_point m_pauseTime;

    std::chrono::steady_clock::time_point m_stopTime;

    std::chrono::milliseconds m_totalTimePaused;
};

}  // namespace timing
}  // namespace utils
}  // namespace avsCommon
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_AVSCOMMON_UTILS_INCLUDE_AVSCOMMON_UTILS_TIMING_STOPWATCH_H_