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/*
* The Mana Server
* Copyright (C) 2004-2010 The Mana World Development Team
*
* This file is part of The Mana Server.
*
* The Mana Server 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
* any later version.
*
* The Mana Server 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 The Mana Server. If not, see <http://www.gnu.org/licenses/>.
*/
#include "timer.h"
#include <time.h>
#include <sys/time.h>
#ifdef _WIN32
#include <windows.h>
#endif
/**
* Calls gettimeofday() and converts it into milliseconds.
*/
static uint64_t getTimeInMillisec()
{
uint64_t timeInMillisec;
timeval time;
gettimeofday(&time, 0);
timeInMillisec = (uint64_t)time.tv_sec * 1000 + time.tv_usec / 1000;
return timeInMillisec;
}
namespace utils
{
Timer::Timer(unsigned ms)
{
active = false;
interval = ms;
lastpulse = getTimeInMillisec();
}
void Timer::sleep()
{
if (!active) return;
uint64_t now = getTimeInMillisec();
if (now - lastpulse >= interval) return;
#ifndef _WIN32
struct timespec req;
req.tv_sec = 0;
req.tv_nsec = (interval - (now - lastpulse)) * (1000 * 1000);
nanosleep(&req, 0);
#else
Sleep(interval - (now - lastpulse));
#endif
}
int Timer::poll()
{
int elapsed = 0;
if (active)
{
uint64_t now = getTimeInMillisec();
if (now > lastpulse)
{
elapsed = (now - lastpulse) / interval;
lastpulse += interval * elapsed;
}
else
{
// Time has made a jump to the past. This should be a rare
// occurence, so just reset lastpulse to prevent problems.
lastpulse = now;
}
};
return elapsed;
}
void Timer::start()
{
active = true;
lastpulse = getTimeInMillisec();
}
void Timer::stop()
{
active = false;
}
void Timer::changeInterval(unsigned newinterval)
{
interval = newinterval;
}
} // ::utils
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