Clock.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Core module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_CLOCK_HPP
#define NAZARA_CLOCK_HPP

#include <Nazara/Prerequesites.hpp>

#if NAZARA_CORE_THREADSAFE && NAZARA_THREADSAFETY_CLOCK
#include <Nazara/Core/ThreadSafety.hpp>
#else
#include <Nazara/Core/ThreadSafetyOff.hpp>
#endif

namespace Nz
{
    class NAZARA_CORE_API Clock
    {
        public:
            Clock(UInt64 startingValue = 0, bool paused = false);
            Clock(const Clock& clock) = default;
            Clock(Clock&& clock) = default;
            ~Clock() = default;

            float GetSeconds() const;
            UInt64 GetMicroseconds() const;
            UInt64 GetMilliseconds() const;

            bool IsPaused() const;

            void Pause();
            void Restart();
            void Unpause();

            Clock& operator=(const Clock& clock) = default;
            Clock& operator=(Clock&& clock) = default;

        private:
            NazaraMutexAttrib(m_mutex, mutable)

            UInt64 m_elapsedTime;
            UInt64 m_refTime;
            bool m_paused;
    };

    typedef UInt64 (*ClockFunction)();

    extern NAZARA_CORE_API ClockFunction GetElapsedMicroseconds;
    extern NAZARA_CORE_API ClockFunction GetElapsedMilliseconds;
}

#endif // NAZARA_CLOCK_HPP