michael@0: #include "precompiled.h"
michael@0: //
michael@0: // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: // RefCountObject.cpp: Defines the gl::RefCountObject base class that provides
michael@0: // lifecycle support for GL objects using the traditional BindObject scheme, but
michael@0: // that need to be reference counted for correct cross-context deletion.
michael@0: // (Concretely, textures, buffers and renderbuffers.)
michael@0: 
michael@0: #include "RefCountObject.h"
michael@0: 
michael@0: RefCountObject::RefCountObject(GLuint id)
michael@0: {
michael@0:     mId = id;
michael@0:     mRefCount = 0;
michael@0: }
michael@0: 
michael@0: RefCountObject::~RefCountObject()
michael@0: {
michael@0:     ASSERT(mRefCount == 0);
michael@0: }
michael@0: 
michael@0: void RefCountObject::addRef() const
michael@0: {
michael@0:     mRefCount++;
michael@0: }
michael@0: 
michael@0: void RefCountObject::release() const
michael@0: {
michael@0:     ASSERT(mRefCount > 0);
michael@0: 
michael@0:     if (--mRefCount == 0)
michael@0:     {
michael@0:         delete this;
michael@0:     }
michael@0: }
michael@0: 
michael@0: void RefCountObjectBindingPointer::set(RefCountObject *newObject)
michael@0: {
michael@0:     // addRef first in case newObject == mObject and this is the last reference to it.
michael@0:     if (newObject != NULL) newObject->addRef();
michael@0:     if (mObject != NULL) mObject->release();
michael@0: 
michael@0:     mObject = newObject;
michael@0: }