/
sweepable.cpp
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/
sweepable.cpp
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/*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010- Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#include <runtime/base/memory/sweepable.h>
#include <runtime/base/memory/memory_manager.h>
#include <util/logger.h>
namespace HPHP {
///////////////////////////////////////////////////////////////////////////////
static __thread Sweepable* t_sweepList = 0;
void Sweepable::SweepAll() {
Sweepable* persistList = 0;
while (t_sweepList) {
Sweepable* s = t_sweepList;
s->unregister();
if (s->m_persistentCount == 0) {
s->sweep();
} else {
if (persistList) {
ASSERT(persistList->m_prevSweepable = &persistList);
persistList->m_prevSweepable = &s->m_nextSweepable;
}
s->m_nextSweepable = persistList;
persistList = s;
s->m_prevSweepable = &persistList;
}
}
t_sweepList = persistList;
if (persistList) {
ASSERT(persistList->m_prevSweepable == &persistList);
persistList->m_prevSweepable = &t_sweepList;
}
}
Sweepable::Sweepable()
: m_nextSweepable(t_sweepList)
, m_prevSweepable(&t_sweepList)
, m_persistentCount(0)
{
if (t_sweepList) {
ASSERT(t_sweepList->m_prevSweepable == &t_sweepList);
t_sweepList->m_prevSweepable = &m_nextSweepable;
}
t_sweepList = this;
}
Sweepable::~Sweepable() {
unregister();
}
void Sweepable::unregister() {
if (m_prevSweepable) {
if (m_nextSweepable) {
m_nextSweepable->m_prevSweepable = m_prevSweepable;
}
*m_prevSweepable = m_nextSweepable;
m_nextSweepable = 0;
m_prevSweepable = 0;
}
}
///////////////////////////////////////////////////////////////////////////////
}