| -rw-r--r-- | libopie2/opiecore/opiecore.pro | 2 | ||||
| -rw-r--r-- | libopie2/opiecore/osharedpointer.h | 136 | ||||
| -rw-r--r-- | libopie2/opiecore/osmartpointer.cpp | 57 | ||||
| -rw-r--r-- | libopie2/opiecore/osmartpointer.h | 33 |
4 files changed, 209 insertions, 19 deletions
diff --git a/libopie2/opiecore/opiecore.pro b/libopie2/opiecore/opiecore.pro index 8189a7c..e72576c 100644 --- a/libopie2/opiecore/opiecore.pro +++ b/libopie2/opiecore/opiecore.pro @@ -10,8 +10,9 @@ HEADERS = oapplication.h \ okeyfilter.h \ opluginloader.h \ oprocess.h \ oprocctrl.h \ + osharedpointer.h \ osmartpointer.h \ ostorageinfo.h \ xmltree.h @@ -24,8 +25,9 @@ SOURCES = oapplication.cpp \ okeyfilter.cpp \ opluginloader.cpp \ oprocess.cpp \ oprocctrl.cpp \ + osmartpointer.cpp \ ostorageinfo.cpp \ xmltree.cpp diff --git a/libopie2/opiecore/osharedpointer.h b/libopie2/opiecore/osharedpointer.h new file mode 100644 index 0000000..f19d836 --- a/dev/null +++ b/libopie2/opiecore/osharedpointer.h @@ -0,0 +1,136 @@ +// -*- Mode: C++; -*- +/* + This file is part of the Opie Project + Copyright (C) 2004 Rajko Albrecht <alwin@handhelds.org> + Copyright (C) 2004 Holger Hans Peter Freyther <freyther@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 O_SHARED_POINTER_H +#define O_SHARED_POINTER_H + +#include <opie2/osmartpointer.h> + +/*! + * \file osharedpointer.h + * \brief Adapter with Refcounting around any data type + * \author Rajko Albrecht and Holger Hans Peter Freyther + */ + +namespace Opie { +namespace Core { +template<class T> +class OSharedPointerData : public ORefCount { +public: + OSharedPointerData( T* dt ) { + data = dt; + } + + ~OSharedPointerData() { + delete data; + } + + T *data; +}; + + +/** + * \brief A small Adapter around any Pointer + * + * + * + */ +template<class T> +class OSharedPointer { + typedef OSharedPointerData<T> Data; + Data* data; + + void unref() { + if (data) { data->Decr(); if (!data->Shared()) delete data; } + data = 0; + } + +public: + OSharedPointer () { data = 0;} + + OSharedPointer( T* t ) { + data = new Data( t ); + data->Incr(); + } + + OSharedPointer( const OSharedPointer<T>& p ) { + if ( data = p.data ) data->Incr(); + } + + ~OSharedPointer() { + unref(); + } + + OSharedPointer<T> &operator=( const OSharedPointer<T>& p ) { + // already same: nothing to do + if (data == p.data) return *this; + // decouple reference + unref(); + // establish new reference + if (data = p.data) data->Incr(); + return *this; + } + + OSharedPointer<T> &operator=( T *p ) { + unref(); + data = new Data( p ); + data->Incr(); + + return *this; + } + + operator T* () const { return data->data; } + T& operator*() { return *data->data; } + const T& operator*()const { return data->data; } + + //! deref with method call + T* operator-> () {return data->data; } + //! deref with const method call + const T* operator-> ()const {return data->data; } + + + //! supports "if (pointer)" + operator bool () const { return (data != 0 && data->data != 0); } + //! "if (pointer)" as non const + operator bool () { return ( data != 0 && data->data != NULL );} + + //! support if (!pointer)" + bool operator! () const { return (data == 0 || data->data == 0); } + //! support if (!pointer)" as non const + bool operator! () { return (data == 0 || data->data == 0); } +}; + +} +} + +#endif diff --git a/libopie2/opiecore/osmartpointer.cpp b/libopie2/opiecore/osmartpointer.cpp new file mode 100644 index 0000000..480e03a --- a/dev/null +++ b/libopie2/opiecore/osmartpointer.cpp @@ -0,0 +1,57 @@ +// -*- 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. +*/ + +#include "osmartpointer.h" + +namespace Opie { +namespace Core { + +ORefCount::ORefCount() + : m_RefCount(0) +{} + +ORefCount::~ORefCount() +{} + +void ORefCount::Incr() { + ++m_RefCount; +} + +void ORefCount::Decr() { + --m_RefCount; +} + +bool ORefCount::Shared() { + return (m_RefCount > 0); +} + +} +} diff --git a/libopie2/opiecore/osmartpointer.h b/libopie2/opiecore/osmartpointer.h index e9cee0c..f2f6464 100644 --- a/libopie2/opiecore/osmartpointer.h +++ b/libopie2/opiecore/osmartpointer.h @@ -2,9 +2,9 @@ /* 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 @@ -47,31 +47,26 @@ namespace Core { //! simple reference counter class class ORefCount { protected: //! reference count member - long m_RefCount; + unsigned long m_RefCount; public: //! first reference must be added after "new" via Pointer() - ORefCount() : m_RefCount(0) - {} - virtual ~ORefCount() {} + ORefCount(); + virtual ~ORefCount(); //! add a reference - void Incr() { - ++m_RefCount; - } + void Incr(); //! delete a reference - void Decr() { - --m_RefCount; - } + void Decr(); //! is it referenced - bool Shared() { return (m_RefCount > 0); } + bool Shared(); }; //! reference counting wrapper class template<class T> class OSmartPointer { //! pointer to object /*! - * this object must contain Incr(), Decr() and Shared() + * 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; @@ -93,17 +88,17 @@ public: } //! construction OSmartPointer(T* t) { if (ptr = t) ptr->Incr(); } //! Pointer copy - OSmartPointer(const OSmartPointer<T>& p) + OSmartPointer(const OSmartPointer<T>& p) { if (ptr = p.ptr) ptr->Incr(); } //! pointer copy by assignment - OSmartPointer<T>& operator= (const OSmartPointer<T>& p) + 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; } + if (ptr) { ptr->Decr(); if (!ptr->Shared()) delete ptr; } // establish new reference if (ptr = p.ptr) ptr->Incr(); return *this; } @@ -119,9 +114,9 @@ public: } //! 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; } @@ -129,14 +124,14 @@ public: //! deref with method call T* operator-> () {return ptr; } //! deref with const method call const T* operator-> ()const {return ptr; } - + //! supports "if (pointer)" operator bool () const { return (ptr != NULL); } //! "if (pointer)" as non const operator bool () { return ptr != NULL;} - + //! support if (!pointer)" bool operator! () const { return (ptr == NULL); } //! support if (!pointer)" as non const bool operator! () { return (ptr == NULL); } |