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comptr.h
Go to the documentation of this file.
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/*
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** ClanLib SDK
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** Copyright (c) 1997-2011 The ClanLib Team
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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** Note: Some of the libraries ClanLib may link to may have additional
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** requirements or restrictions.
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**
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** File Author(s):
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**
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** Magnus Norddahl
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*/
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#pragma once
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#include "../api_core.h"
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template
<
typename
Type>
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class
CL_API_CORE
CL_ComPtr
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{
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public
:
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CL_ComPtr
() : ptr(0) { }
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CL_ComPtr
(Type *ptr) : ptr(ptr) { }
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CL_ComPtr
(
const
CL_ComPtr
©) : ptr(copy.ptr) {
if
(ptr) ptr->AddRef(); }
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~CL_ComPtr
() { clear(); }
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CL_ComPtr
&operator =(
const
CL_ComPtr
©)
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{
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if
(
this
== ©)
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return
*
this
;
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copy.
ptr
->AddRef();
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if
(ptr)
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ptr->Release();
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ptr = copy.
ptr
;
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return
*
this
;
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}
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const
Type *
const
operator ->()
const
{
return
ptr; }
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Type *operator ->() {
return
ptr; }
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operator
Type *() {
return
ptr; }
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bool
is_null
()
const
{
return
ptr == 0; }
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void
clear
() {
if
(ptr) ptr->Release(); ptr = 0; }
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Type **
output_variable
() { clear();
return
&ptr; }
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Type *
ptr
;
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};
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