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/*
* Copyright (c) 2011, Denis Steckelmacher <steckdenis@yahoo.fr>
* Copyright (c) 2012-2014, Texas Instruments Incorporated - http://www.ti.com/
* 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 THE CONTRIBUTORS 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"
#include "u_concurrent_set.h"
using namespace Coal;
/*-----------------------------------------------------------------------------
* This static was previously inside the getKnownObjects function in order to
* delay its construction until first use. Since we now delay the construction
* of the platform until first use, we need to make sure that known_objects
* lifetime is a superset of the the_platform and all opencl objects lifetimes.
* Therefore we moved the definition of known_objects to global scope which
* will ensure that it exists before the_platform and should also ensure that
* it is destroyed after the_platform, since objects are destructed in reverse
* order of construction. Both singletons created with new and statics are
* both placed in the same dtor queue.
*----------------------------------------------------------------------------*/
static concurrent_set<Object *> 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
known_objects.insert(this);
}
Object::~Object()
{
if (p_parent && p_parent->dereference() && p_release_parent)
delete p_parent;
// Remove object from the list of known objects
known_objects.erase(this);
p_type = T_Invalid;
}
void Object::reference()
{
__sync_fetch_and_add(&p_references, 1);
}
bool Object::dereference()
{
unsigned int oldval = __sync_fetch_and_sub(&p_references, 1);
return (oldval == 1);
}
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;
return known_objects.memberp((Object *) this) && type == p_type;
}
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