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inc
cc++
pointer.h
Go to the documentation of this file.
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// Copyright (C) 2001-2005 Open Source Telecom Corporation.
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// Copyright (C) 2006-2010 David Sugar, Tycho Softworks.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// As a special exception to the GNU General Public License, permission is
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// granted for additional uses of the text contained in its release
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// of Common C++.
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//
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// The exception is that, if you link the Common C++ library with other
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// files to produce an executable, this does not by itself cause the
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// resulting executable to be covered by the GNU General Public License.
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// Your use of that executable is in no way restricted on account of
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// linking the Common C++ library code into it.
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//
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// This exception does not however invalidate any other reasons why
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// the executable file might be covered by the GNU General Public License.
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//
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// This exception applies only to the code released under the
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// name Common C++. If you copy code from other releases into a copy of
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// Common C++, as the General Public License permits, the exception does
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// not apply to the code that you add in this way. To avoid misleading
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// anyone as to the status of such modified files, you must delete
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// this exception notice from them.
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//
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// If you write modifications of your own for Common C++, it is your choice
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// whether to permit this exception to apply to your modifications.
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// If you do not wish that, delete this exception notice.
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#ifndef CCXX_POINTER_H_
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#define CCXX_POINTER_H_
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#ifndef CCXX_MISSING_H_
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#include <
cc++/missing.h
>
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#endif
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#ifdef CCXX_NAMESPACES
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namespace
ost {
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#endif
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template
<
class
T>
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class
Pointer
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{
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protected
:
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unsigned
*
ptrCount
;
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T *
ptrObject
;
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void
ptrDetach
(
void
)
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{
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if
(
ptrCount
&& --(*
ptrCount
)==0) {
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delete
ptrObject
;
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delete
ptrCount
;
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}
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ptrObject
= NULL;
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ptrCount
= NULL;
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}
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public
:
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explicit
Pointer
(T* ptr = NULL) :
ptrObject
(ptr)
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{
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ptrCount
=
new
unsigned;
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*
ptrCount
= 1;
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}
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Pointer
(
const
Pointer<T>
&ref)
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{
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ptrObject
= ref.
ptrObject
;
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ptrCount
= ref.
ptrCount
;
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++(*ptrCount);
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}
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inline
virtual
~Pointer
()
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{
ptrDetach
();}
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Pointer
&
operator=
(
const
Pointer<T>
&ref)
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{
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if
(
this
!= &ref) {
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ptrDetach
();
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ptrObject
= ref.
ptrObject
;
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ptrCount
= ref.
ptrCount
;
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++(*ptrCount);
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}
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return
*
this
;
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}
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inline
T&
operator*
()
const
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{
return
*
ptrObject
;};
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inline
T*
getObject
()
const
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{
return
ptrObject
;};
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inline
T*
operator->
()
const
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{
return
ptrObject
;};
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inline
bool
operator!
()
const
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{
return
(*
ptrCount
== 1);};
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inline
int
operator++
()
const
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{
return
++(*ptrCount);};
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int
operator--
()
const
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{
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if
(*
ptrCount
== 1) {
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delete
this
;
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return
0;
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}
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return
--(*ptrCount);
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}
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};
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#ifdef CCXX_NAMESPACES
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}
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#endif
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#endif
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