/*
 * Copyright (C) 2011 log-tools.net
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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.
 */

/*!
 *  \file	TimeSpan.h
 *  \brief	経過時間クラス
 *  \author	Copyright 2011 log-tools.net
 */
#pragma once
#include "slog/slog.h"

namespace slog
{

/*!
 *  \brief	経過時間クラス
 */
class TimeSpan
{
#if defined(__x86_64)
	uint64_t	mMS;	//!< ミリ秒
#else
	uint32_t	mMS;	//!< ミリ秒
#endif

public:		TimeSpan();
			uint32_t operator-(const TimeSpan& timeSpan) const;
};

/*!
 *  \brief	コンストラクタ
 */
TimeSpan::TimeSpan()
{
#if defined(_WINDOWS)
	mMS = (uint32_t)timeGetTime();
#else
	mMS = clock() / (CLOCKS_PER_SEC / 1000);
#endif
}

/*!
 *  \brief	差を取得する
 */
uint32_t TimeSpan::operator-(const TimeSpan& timeSpan) const
{
#if !defined(__x86_64)
	if (mMS < timeSpan.mMS)
		return ((0xFFFFFFFF - timeSpan.mMS + 1) + mMS);
#endif

	return (mMS - timeSpan.mMS);
}

} // namespace slog
