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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================//
#include "cbase.h"
#include "timedeventmgr.h"
#include "tier0/vprof.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
// ------------------------------------------------------------------------------------------ //
// CEventRegister.
// ------------------------------------------------------------------------------------------ //
CEventRegister::CEventRegister()
{
m_bRegistered = false;
m_pEventMgr = NULL;
}
CEventRegister::~CEventRegister()
{
Term();
}
void CEventRegister::Init( CTimedEventMgr *pMgr, IEventRegisterCallback *pCallback )
{
Term();
m_pEventMgr = pMgr;
m_pCallback = pCallback;
}
void CEventRegister::Term()
{
// Unregister.
if ( m_pEventMgr && m_bRegistered )
{
m_pEventMgr->RemoveEvent( this );
}
}
void CEventRegister::SetUpdateInterval( float interval )
{
Assert( m_pEventMgr );
if ( m_pEventMgr )
{
// Register for this event.
m_flUpdateInterval = interval;
m_flNextEventTime = gpGlobals->curtime + m_flUpdateInterval;
m_pEventMgr->RegisterForNextEvent( this );
}
}
void CEventRegister::StopUpdates()
{
if ( m_pEventMgr )
{
// Unregister our next event.
m_pEventMgr->RemoveEvent( this );
}
}
void CEventRegister::Reregister()
{
if ( m_flUpdateInterval > 1e-6 && m_pEventMgr )
{
while ( m_flNextEventTime <= gpGlobals->curtime )
{
m_flNextEventTime += m_flUpdateInterval;
}
m_pEventMgr->RegisterForNextEvent( this );
}
}
// ------------------------------------------------------------------------------------------ //
// CTimedEventMgr.
// ------------------------------------------------------------------------------------------ //
bool TimedEventMgr_LessFunc( CEventRegister* const &a, CEventRegister* const &b )
{
return a->m_flNextEventTime > b->m_flNextEventTime;
}
CTimedEventMgr::CTimedEventMgr()
{
m_Events.SetLessFunc( TimedEventMgr_LessFunc );
}
void CTimedEventMgr::FireEvents()
{
VPROF( "CTimedEventMgr::FireEvents" );
while ( m_Events.Count() )
{
// Fire the top element, then break out.
CEventRegister *pEvent = m_Events.ElementAtHead();
if ( gpGlobals->curtime >= pEvent->m_flNextEventTime )
{
// Reregister for the timed event, then fire the callback for the event.
m_Events.RemoveAtHead();
pEvent->m_bRegistered = false;
pEvent->Reregister();
pEvent->m_pCallback->FireEvent();
}
else
{
break;
}
}
}
void CTimedEventMgr::RegisterForNextEvent( CEventRegister *pEvent )
{
RemoveEvent( pEvent );
m_Events.Insert( pEvent );
pEvent->m_bRegistered = true;
}
void CTimedEventMgr::RemoveEvent( CEventRegister *pEvent )
{
if ( pEvent->m_bRegistered )
{
// Find the event in the list and remove it.
int cnt = m_Events.Count();
for ( int i=0; i < cnt; i++ )
{
if ( m_Events.Element( i ) == pEvent )
{
m_Events.RemoveAt( i );
break;
}
}
}
}
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