eqemu-server/common/timer.cpp

/*	EQEmu: EQEmulator

	Copyright (C) 2001-2026 EQEmu 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "timer.h"

// Disgrace: for windows compile
#ifndef WIN32
#include <sys/time.h>
#else
#include <sys/timeb.h>
#include <WinSock2.h>
#undef GetCurrentTime
#endif

uint32 current_time = 0;
uint32 last_time = 0;

Timer::Timer() {
	timer_time = 0;
	start_time = current_time;
	set_at_trigger = timer_time;
	pUseAcurateTiming = false;
	enabled = false;
}

Timer::Timer(uint32 in_timer_time, bool iUseAcurateTiming) {
	timer_time = in_timer_time;
	start_time = current_time;
	set_at_trigger = timer_time;
	pUseAcurateTiming = iUseAcurateTiming;
	if (timer_time == 0) {
		enabled = false;
	}
	else {
		enabled = true;
	}
}

Timer::Timer(uint32 start, uint32 timer, bool iUseAcurateTiming = false) {
	timer_time = timer;
	start_time = start;
	set_at_trigger = timer_time;
	pUseAcurateTiming = iUseAcurateTiming;
	if (timer_time == 0) {
		enabled = false;
	}
	else {
		enabled = true;
	}
}

/* Reimplemented for MSVC - Bounce */
#ifdef _WINDOWS
int gettimeofday (timeval *tp, ...)
{
	timeb tb;

	ftime (&tb);

	tp->tv_sec = tb.time;
	tp->tv_usec = tb.millitm * 1000;

	return 0;
}
#endif

/* This function checks if the timer triggered */
bool Timer::Check(bool iReset)
{
	if (enabled && current_time-start_time > timer_time) {
		if (iReset) {
			if (pUseAcurateTiming)
				start_time += timer_time;
			else
				start_time = current_time; // Reset timer
			timer_time = set_at_trigger;
		}
		return true;
	}

	return false;
}

/* This function disables the timer */
void Timer::Disable() {
	enabled = false;
}

void Timer::Enable() {
	enabled = true;
}

/* This function set the timer and restart it */
void Timer::Start(uint32 set_timer_time, bool ChangeResetTimer) {
	start_time = current_time;
	enabled = true;
	if (set_timer_time != 0)
	{
		timer_time = set_timer_time;
		if (ChangeResetTimer)
			set_at_trigger = set_timer_time;
	}
}

/* This timer updates the timer without restarting it */
void Timer::SetTimer(uint32 set_timer_time) {
	/* If we were disabled before => restart the timer */
	if (!enabled) {
		start_time = current_time;
		enabled = true;
	}
	if (set_timer_time != 0) {
		timer_time = set_timer_time;
		set_at_trigger = set_timer_time;
	}
}

uint32 Timer::GetRemainingTime() const
{
	if (enabled) {
		if (current_time - start_time > timer_time) {
			return 0;
		}
		else {
			return (start_time + timer_time) - current_time;
		}
	}
	else {
		return 0xFFFFFFFF;
	}
}

void Timer::SetAtTrigger(uint32 in_set_at_trigger, bool iEnableIfDisabled, bool ChangeTimerTime) {
	set_at_trigger = in_set_at_trigger;
	if (!Enabled() && iEnableIfDisabled) {
		Enable();
	}
	if (ChangeTimerTime)
		timer_time = set_at_trigger;
}

void Timer::Trigger()
{
	enabled = true;

	timer_time = set_at_trigger;
	start_time = current_time-timer_time-1;
}

const uint32 Timer::GetCurrentTime()
{
	return current_time;
}

//just to keep all time related crap in one place... not really related to timers.
const uint32 Timer::GetTimeSeconds() {
	struct timeval read_time;

	gettimeofday(&read_time,0);
	return(read_time.tv_sec);
}

const uint32 Timer::SetCurrentTime()
{
	struct timeval read_time;
	uint32 this_time;

	gettimeofday(&read_time,0);
	this_time = read_time.tv_sec * 1000 + read_time.tv_usec / 1000;

	if (last_time == 0)
	{
		current_time = 0;
	}
	else
	{
		current_time += this_time - last_time;
	}

	last_time = this_time;

//	cerr << "Current time:" << current_time << endl;
	return current_time;
}

const uint32 Timer::RollForward(uint32 seconds)
{
	struct timeval read_time{};
	uint32 this_time;

	gettimeofday(&read_time, nullptr);
	this_time = read_time.tv_sec * 1000 + read_time.tv_usec / 1000;

	if (last_time == 0) {
		current_time = 0;
	}
	else {
		current_time += this_time - last_time;
	}

	last_time = this_time;

	// Roll forward the specified number of seconds (converted to milliseconds)
	current_time += seconds * 1000;

	return current_time;
}