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//
// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// RefCountObject.h: Defines the gl::RefCountObject base class that provides
// lifecycle support for GL objects using the traditional BindObject scheme, but
// that need to be reference counted for correct cross-context deletion.
// (Concretely, textures, buffers and renderbuffers.)
#ifndef COMMON_REFCOUNTOBJECT_H_
#define COMMON_REFCOUNTOBJECT_H_
#include <cstddef>
#include "angle_gl.h"
#include "common/debug.h"
class RefCountObject
{
public:
explicit RefCountObject(GLuint id);
virtual ~RefCountObject();
virtual void addRef() const;
virtual void release() const;
GLuint id() const { return mId; }
private:
GLuint mId;
mutable std::size_t mRefCount;
};
class RefCountObjectBindingPointer
{
protected:
RefCountObjectBindingPointer() : mObject(NULL) { }
~RefCountObjectBindingPointer() { ASSERT(mObject == NULL); } // Objects have to be released before the resource manager is destroyed, so they must be explicitly cleaned up.
void set(RefCountObject *newObject);
RefCountObject *get() const { return mObject; }
public:
GLuint id() const { return (mObject != NULL) ? mObject->id() : 0; }
bool operator!() const { return (get() == NULL); }
private:
RefCountObject *mObject;
};
template <class ObjectType>
class BindingPointer : public RefCountObjectBindingPointer
{
public:
void set(ObjectType *newObject) { RefCountObjectBindingPointer::set(newObject); }
ObjectType *get() const { return static_cast<ObjectType*>(RefCountObjectBindingPointer::get()); }
ObjectType *operator->() const { return get(); }
};
template <class ObjectType>
class OffsetBindingPointer : public RefCountObjectBindingPointer
{
public:
OffsetBindingPointer() : mOffset(0), mSize(0) { }
void set(ObjectType *newObject)
{
RefCountObjectBindingPointer::set(newObject);
mOffset = 0;
mSize = 0;
}
void set(ObjectType *newObject, GLintptr offset, GLsizeiptr size)
{
RefCountObjectBindingPointer::set(newObject);
mOffset = offset;
mSize = size;
}
GLintptr getOffset() const { return mOffset; }
GLsizeiptr getSize() const { return mSize; }
ObjectType *get() const { return static_cast<ObjectType*>(RefCountObjectBindingPointer::get()); }
ObjectType *operator->() const { return get(); }
private:
GLintptr mOffset;
GLsizeiptr mSize;
};
#endif // COMMON_REFCOUNTOBJECT_H_
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