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/*
* Copyright (c) 2011, Denis Steckelmacher <steckdenis@yahoo.fr>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file object.cpp
* \brief Reference-counted object tree
*/
#include "object.h"
using namespace Coal;
static std::list<Object *>& getKnownObjects()
{
static std::list<Object *> known_objects;
return known_objects;
}
Object::Object(Type type, Object *parent)
: p_references(1), p_parent(parent), p_type(type), p_release_parent(true)
{
if (parent)
parent->reference();
// Add object in the list of known objects
getKnownObjects().push_front(this);
p_it = getKnownObjects().begin();
}
Object::~Object()
{
if (p_parent && p_parent->dereference() && p_release_parent)
delete p_parent;
// Remove object from the list of known objects
getKnownObjects().erase(p_it);
}
void Object::reference()
{
p_references++;
}
bool Object::dereference()
{
p_references--;
return (p_references == 0);
}
void Object::setReleaseParent (bool release)
{
p_release_parent = release;
}
unsigned int Object::references() const
{
return p_references;
}
Object *Object::parent() const
{
return p_parent;
}
Object::Type Object::type() const
{
return p_type;
}
bool Object::isA(Object::Type type) const
{
// Check for null values
if (this == 0)
return false;
// Check that the value isn't garbage or freed pointer
std::list<Object *>::const_iterator it = getKnownObjects().begin(),
e = getKnownObjects().end();
while (it != e)
{
if (*it == this)
return this->type() == type;
++it;
}
return false;
}
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