File: scoped_timer.cc

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/*
 * Copyright (C) 2006-2013 by the Widelands Development Team
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "base/scoped_timer.h"

#include <SDL.h>
#include <boost/format.hpp>

#include "base/log.h"

ScopedTimer::ScopedTimer(const std::string& message) : message_(message) {
	startime_ = SDL_GetTicks();
	lasttime_ = startime_;
}

ScopedTimer::~ScopedTimer() {
	uint32_t ms_in_existance = SDL_GetTicks() - startime_;
	const std::string logmessage = (boost::format(message_) % ms_in_existance).str();
	log("%s\n", logmessage.c_str());
}

uint32_t ScopedTimer::ms_since_last_query() {
	uint32_t current_time = SDL_GetTicks();
	assert(current_time >= lasttime_);

	uint32_t delta = current_time - lasttime_;
	lasttime_ = current_time;
	return delta;
}