////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2017-2019, Intel Corporation
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
////////////////////////////////////////////////////////////////////////////////

#pragma once

#include "Windows.h"

// A simple stopwatch class using Windows' high-resolution performance counters.
class StopWatch
{
public:
    StopWatch();

    void Start();
    void Stop();
    void Reset();

    double TimeInSeconds() const;
    double TimeInMilliseconds() const;
    double TimeInMicroseconds() const;

private:
    LONGLONG frequency;
    LONGLONG start;
    LONGLONG stop;
    DWORD_PTR affinityMask;
};
