/*
 *
 * Copyright (C) 2013 Alexandr Vodiannikov aka "Aleksoid1978" (Aleksoid1978@mail.ru)
 *
 * This file is part of MPC-BE.
 *
 * MPC-BE is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * MPC-BE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * use source from http://www.philosophicalgeek.com/2009/01/03/determine-cpu-usage-of-current-process-c-and-c/
 *
 */

#pragma once

class CCPUUsage
{
public:
	CCPUUsage();

	const short GetUsage();
private:
	ULONGLONG SubtractTimes(const FILETIME& ftA, const FILETIME& ftB);
	bool EnoughTimePassed();
	inline bool IsFirstRun() const { return (m_dwLastRun == 0); }

	//system total times
	FILETIME m_ftPrevSysKernel;
	FILETIME m_ftPrevSysUser;

	//process times
	FILETIME m_ftPrevProcKernel;
	FILETIME m_ftPrevProcUser;

	short m_nCPUUsage;
	DWORD m_dwLastRun;

	volatile LONG m_lRunCount;
};
