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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2001-2002 NaN Holding BV. All rights reserved. */
/** \file
* \ingroup GHOST
* Declaration of GHOST_TimerManager class.
*/
#pragma once
#include <vector>
#include "GHOST_Types.h"
class GHOST_TimerTask;
/**
* Manages a list of timer tasks.
* Timer tasks added are owned by the manager.
* Don't delete timer task objects.
*/
class GHOST_TimerManager {
public:
/**
* Constructor.
*/
GHOST_TimerManager();
/**
* Destructor.
*/
~GHOST_TimerManager();
/**
* Returns the number of timer tasks.
* \return The number of events on the stack.
*/
uint32_t getNumTimers();
/**
* Returns whether this timer task ins in our list.
* \return Indication of presence.
*/
bool getTimerFound(GHOST_TimerTask *timer);
/**
* Adds a timer task to the list.
* It is only added when it not already present in the list.
* \param timer: The timer task added to the list.
* \return Indication as to whether addition has succeeded.
*/
GHOST_TSuccess addTimer(GHOST_TimerTask *timer);
/**
* Removes a timer task from the list.
* It is only removed when it is found in the list.
* \param timer: The timer task to be removed from the list.
* \return Indication as to whether removal has succeeded.
*/
GHOST_TSuccess removeTimer(GHOST_TimerTask *timer);
/**
* Finds the soonest time the next timer would fire.
* \return The soonest time the next timer would fire,
* or GHOST_kFireTimeNever if no timers exist.
*/
uint64_t nextFireTime();
/**
* Checks all timer tasks to see if they are expired and fires them if needed.
* \param time: The current time.
* \return True if any timers were fired.
*/
bool fireTimers(uint64_t time);
/**
* Checks this timer task to see if they are expired and fires them if needed.
* \param time: The current time.
* \param task: The timer task to check and optionally fire.
* \return True if the timer fired.
*/
bool fireTimer(uint64_t time, GHOST_TimerTask *task);
protected:
/**
* Deletes all timers.
*/
void disposeTimers();
using TTimerVector = std::vector<GHOST_TimerTask *>;
/** The list with event consumers. */
TTimerVector m_timers;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("GHOST:GHOST_TimerManager")
#endif
};
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