You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.1 KiB
90 lines
2.1 KiB
/*
|
|
* This file is part of the KDE libraries
|
|
* Copyright (C) 2003 Apple Computer, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public License
|
|
* along with this library; see the file COPYING.LIB. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
|
|
#include "scope_chain.h"
|
|
|
|
#include "object.h"
|
|
|
|
#include <assert.h>
|
|
|
|
namespace KJS {
|
|
|
|
inline void ScopeChain::ref() const
|
|
{
|
|
for (ScopeChainNode *n = _node; n; n = n->next) {
|
|
if (n->refCount++ != 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
ScopeChain &ScopeChain::operator=(const ScopeChain &c)
|
|
{
|
|
c.ref();
|
|
deref();
|
|
_node = c._node;
|
|
return *this;
|
|
}
|
|
|
|
void ScopeChain::push(ObjectImp *o)
|
|
{
|
|
assert(o);
|
|
_node = new ScopeChainNode(_node, o);
|
|
}
|
|
|
|
void ScopeChain::pop()
|
|
{
|
|
ScopeChainNode *oldNode = _node;
|
|
assert(oldNode);
|
|
ScopeChainNode *newNode = oldNode->next;
|
|
_node = newNode;
|
|
|
|
if (--oldNode->refCount != 0) {
|
|
if (newNode)
|
|
++newNode->refCount;
|
|
} else {
|
|
delete oldNode;
|
|
}
|
|
}
|
|
|
|
void ScopeChain::release()
|
|
{
|
|
// This function is only called by deref(),
|
|
// Deref ensures these conditions are true.
|
|
assert(_node && _node->refCount == 0);
|
|
ScopeChainNode *n = _node;
|
|
do {
|
|
ScopeChainNode *next = n->next;
|
|
delete n;
|
|
n = next;
|
|
} while (n && --n->refCount == 0);
|
|
}
|
|
|
|
void ScopeChain::mark()
|
|
{
|
|
for (ScopeChainNode *n = _node; n; n = n->next) {
|
|
ObjectImp *o = n->object;
|
|
if (!o->marked())
|
|
o->mark();
|
|
}
|
|
}
|
|
|
|
} // namespace KJS
|