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/*
FALCON - The Falcon Programming Language.
FILE: rampmode.cpp
Ramp mode - progressive GC limits adjustment algoritmhs
-------------------------------------------------------------------
Author: Giancarlo Niccolai
Begin: Thu, 19 Mar 2009 08:23:59 +0100
-------------------------------------------------------------------
(C) Copyright 2009: the FALCON developers (see list in AUTHORS file)
See LICENSE file for licensing details.
*/
#include <falcon/rampmode.h>
#include <falcon/memory.h>
#include <falcon/mempool.h>
namespace Falcon {
RampMode::~RampMode()
{}
void RampMode::reset()
{
}
//=========================================================
// A void ramp mode.
RampNone::~RampNone()
{
}
void RampNone::onScanInit()
{
m_active = memPool->thresholdActive();
m_normal = memPool->thresholdNormal();
}
void RampNone::onScanComplete()
{
}
//=========================================================
//
RampStrict::~RampStrict()
{
}
void RampStrict::onScanInit()
{
}
void RampStrict::onScanComplete()
{
m_active = gcMemAllocated();
m_normal = m_active/2;
}
//=========================================================
//
RampLoose::~RampLoose()
{
}
void RampLoose::onScanInit()
{
m_active = (size_t)(gcMemAllocated() );
m_normal = (size_t)(gcMemAllocated() / 2 );
}
void RampLoose::onScanComplete()
{
}
//=========================================================
//
RampSmooth::RampSmooth( numeric factor ):
RampMode(),
m_pNormal(0),
m_pActive(0),
m_factor( factor )
{
if ( m_factor < 1.0 )
m_factor = 1.0;
}
RampSmooth::~RampSmooth()
{
}
void RampSmooth::reset()
{
m_pNormal = 0;
}
void RampSmooth::onScanInit()
{
// on the first loop, we setup the waiting loops.
if ( m_pNormal == 0 )
{
m_pNormal = gcMemAllocated();
m_normal = m_pNormal;
m_active = (size_t)(m_normal * m_factor);
}
}
void RampSmooth::onScanComplete()
{
// size_t is usually unsigned.
size_t allocated = gcMemAllocated();
if( m_pNormal > allocated )
{
// we're getting smaller
m_pNormal -= (size_t)((m_pNormal - allocated) / m_factor);
}
else {
m_pNormal += size_t((allocated-m_pNormal) / m_factor);
}
m_normal = m_pNormal;
m_active = (size_t)(m_normal * m_factor);
}
}
/* end of rampmode.cpp */
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