| -rw-r--r-- | libopie2/opiecore/osmartpointer.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libopie2/opiecore/osmartpointer.h b/libopie2/opiecore/osmartpointer.h index 8f9da7f..c7dc9d9 100644 --- a/libopie2/opiecore/osmartpointer.h +++ b/libopie2/opiecore/osmartpointer.h @@ -1,130 +1,132 @@ // -*- Mode: C++; -*- /* This file is part of the Opie Project Copyright (C) 2004 Rajko Albrecht <alwin@handhelds.org> Copyright (C) The Opie Team <opie-devel@handhelds.org> =. .=l. .>+-= _;:, .> :=|. This program is free software; you can .> <`_, > . <= redistribute it and/or modify it under :`=1 )Y*s>-.-- : the terms of the GNU Library General Public .="- .-=="i, .._ License as published by the Free Software - . .-<_> .<> Foundation; either version 2 of the License, ._= =} : or (at your option) any later version. .%`+i> _;_. .i_,=:_. -<s. This program is distributed in the hope that + . -:. = it will be useful, but WITHOUT ANY WARRANTY; : .. .:, . . . without even the implied warranty of =_ + =;=|` MERCHANTABILITY or FITNESS FOR A _.=:. : :=>`: PARTICULAR PURPOSE. See the GNU ..}^=.= = ; Library General Public License for more ++= -. .` .: details. : = ...= . :.=- -. .:....=;==+<; You should have received a copy of the GNU -_. . . )=. = Library General Public License along with -- :-=` this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _OSmartPointer_h #define _OSmartPointer_h +#include <stddef.h> + /*! * \file OSmartPointer.h * \brief smart pointer and reference counter * \author Rajko Albrecht * */ namespace Opie { namespace Core { //! simple reference counter class class ORefCount { protected: //! reference count member long m_RefCount; public: //! first reference must be added after "new" via Pointer() ORefCount() : m_RefCount(0) {} virtual ~ORefCount() {} //! add a reference void Incr() { ++m_RefCount; } //! delete a reference void Decr() { --m_RefCount; } //! is it referenced bool Shared() { return (m_RefCount > 0); } }; //! reference counting wrapper class template<class T> class OSmartPointer { //! pointer to object /*! * this object must contain Incr(), Decr() and Shared() * methode as public members. The best way is, that it will be a child * class of RefCount */ T *ptr; public: //! standart constructor OSmartPointer() { ptr = NULL; } //! standart destructor /*! * release the reference, if it were the last reference, destroys * ptr */ ~OSmartPointer() { if (ptr){ ptr->Decr(); if (!ptr->Shared()) delete ptr; } } //! construction OSmartPointer(T* t) { if (ptr = t) ptr->Incr(); } //! Pointer copy OSmartPointer(const OSmartPointer<T>& p) { if (ptr = p.ptr) ptr->Incr(); } //! pointer copy by assignment OSmartPointer<T>& operator= (const OSmartPointer<T>& p) { // already same: nothing to do if (ptr == p.ptr) return *this; // decouple reference if (ptr) { ptr->Decr(); if (!ptr->Shared()) delete ptr; } // establish new reference if (ptr = p.ptr) ptr->Incr(); return *this; } OSmartPointer<T>& operator= (T*p) { if (ptr==p)return *this; if (ptr) { ptr->Decr(); if (!ptr->Shared()) delete ptr; } if (ptr=p) ptr->Incr(); return *this; } //! cast to conventional pointer operator T* () const { return ptr; } //! deref: fails for NULL pointer T& operator* () {return *ptr; } //! deref: fails for NULL pointer const T& operator* ()const {return *ptr; } //! deref with method call T* operator-> () {return ptr; } //! deref with const method call const T* operator-> ()const {return ptr; } |