catch2/include/internal/catch_timer.hpp

/*
 *  Created by Phil on 05/08/2013.
 *  Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
 *
 *  Distributed under the Boost Software License, Version 1.0. (See accompanying
 *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 */

#include "catch_timer.h"

#include <chrono>

namespace Catch {

    namespace {
        uint64_t getCurrentMicrosecondsSinceEpoch() {
            return std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
        }
    }

    void Timer::start() {
        m_microSeconds = getCurrentMicrosecondsSinceEpoch();
    }
    unsigned int Timer::getElapsedMicroseconds() const {
        return static_cast<unsigned int>(getCurrentMicrosecondsSinceEpoch() - m_microSeconds);
    }
    unsigned int Timer::getElapsedMilliseconds() const {
        return static_cast<unsigned int>(getElapsedMicroseconds()/1000);
    }
    double Timer::getElapsedSeconds() const {
        return getElapsedMicroseconds()/1000000.0;
    }

} // namespace Catch