/*
 * Copyright (C) 2001-2008 Jacek Sieka, arnetheduck on gmail point com
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "stdinc.h"
#include "DCPlusPlus.h"

#include "TimerManager.h"

namespace dcpp {

#ifdef _WIN32
DWORD TimerManager::lastTick = 0;
uint32_t TimerManager::cycles = 0;
FastCriticalSection TimerManager::cs;
#else
timeval TimerManager::tv;
#endif

int TimerManager::run() {
	int nextMin = 0;

	uint64_t x = getTick();
	uint64_t nextTick = x + 1000;

	while(!s.wait(nextTick > x ? nextTick - x : 0)) {
		uint32_t z = getTick();
		nextTick = z + 1000;
		fire(TimerManagerListener::Second(), z);
		if(nextMin++ >= 60) {
			fire(TimerManagerListener::Minute(), z);
			nextMin = 0;
		}
		x = getTick();
	}

	return 0;
}

uint64_t TimerManager::getTick() {
#ifdef _WIN32
	FastLock l(cs);

	DWORD tick = ::GetTickCount();
	if(tick < lastTick) {
		cycles++;
	}
	lastTick = tick;
	return static_cast<uint64_t>(cycles) * (static_cast<uint64_t>(std::numeric_limits<DWORD>::max()) + 1) + tick;
#else
	timeval tv2;
	gettimeofday(&tv2, NULL);
	/// @todo check conversions to use uint64_t fully
	return static_cast<uint64_t>(((tv2.tv_sec - tv.tv_sec) * 1000 ) + ( (tv2.tv_usec - tv.tv_usec) / 1000));
#endif
}

} // namespace dcpp