// -*- mode:C++; tab-width:2; c-basic-offset:2; indent-tabs-mode:nil -*-
//
// Copyright (C) 2000-2005 by Roger Rene Kommer / artefaktur, Kassel, Germany.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public License (LGPL).
//
//
// This library 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
// License ACDK-FreeLicense document enclosed in the distribution
// for more for more details.
// This file is part of the Artefaktur Component Development Kit:
// ACDK
//
// Please refer to
// - http://www.acdk.de
// - http://www.artefaktur.com
// - http://acdk.sourceforge.net
// for more information.
//
// $Header: /cvsroot/acdk/acdk/acdk_core/src/acdk/lang/sys/RefHolder3.h,v 1.43 2005/04/13 12:57:09 kommer Exp $
/*
RefHolder3
Different to RefHolder2, the instances are derived.
@internal
*/
#ifndef ACDK_REFCOUNTING_CODE
#define ACDK_REFCOUNTING_CODE(code) code
#endif
template <typename T>
inline
T* dmi_cast(::acdk::lang::ObjectBase* objbase);
template <typename T>
inline
void dmi_cast2(::acdk::lang::ObjectBase* from, T*& toI, ::acdk::lang::Object*& toO);
/**
No implicit convertion from RAClass to acdk::lang::Object
possible. For convenience introduce a
operator acdk::lang::Object();
*/
//#define ACDK_CORE_NEED_ROBJECT_CONVERTER
#ifdef ACDK_NO_EXPLICIT_OVERLOADING_BUG
#define upcast_explicit
#else
/FONT>
#define upcast_explicit explicit
#endif
/FONT>
/*
Documentation in RefHolderX.h
RefHolder is the base template class to hold references.
@author Roger Rene Kommer
@version $Revision: 1.43 $
@date $Date: 2005/04/13 12:57:09 $
Normally the user will not handle this directly, but
will will be declared with:<br>
ACDK_DECL_CLASS(ClassName)<br>
This will define:<br>
typedef RefHolder<ClassName> RClassName;
*/
template<class T>
class RefHolder
{
protected:
/* _impl is a pointer to acdk::lang::Object.*/
::acdk::lang::Object* _impl;
/* _iptr is a rightcasted pointer to the class */
T* _iptr;
public:
void* operator new(size_t size) { return acdk_allocate(size); }
void operator delete(void* ptr) { acdk_deallocate(ptr); }
void* operator new[](size_t size){ return acdk_allocate(size); }
void operator delete[](void* ptr){ acdk_deallocate(ptr); }
void* operator new(size_t size, ::acdk::lang::sys::Allocator* allocator) { return acdk_allocate(size, allocator); }
void* operator new(size_t size, void* memptr) { return memptr; }
#ifdef ACDK_HAS_USER_DEFINDED_OPERATOR_DELETE
void operator delete(void* mem, ::acdk::lang::sys::Allocator* allocator) { acdk_deallocate(mem, allocator); }
void operator delete(void* mem, void* memptr) { }
#endif //ACDK_HAS_USER_DEFINDED_OPERATOR_DELETE
typedef T Type;
void _init(::acdk::lang::Object* obj);
void _init(T* iface, ::acdk::lang::Object* obj)
{
if (iface == 0)
return;
_iptr = iface;
_init(obj);
}
void _init(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj)
{
if (obj == 0)
return;
dmi_cast2<T>(iface, _iptr, obj);
_init(obj);
}
void _init(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj);
void _release();
void _assign(T* iface, ::acdk::lang::Object* obj);
/*
precond: iface != 0 && obj != impl
*/
void _assing2(T* iface, ::acdk::lang::Object* obj);
void _assign(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj);
void _assign(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj);
/* default constructors */
RefHolder(NilRef n = Nil)
: _impl(0)
, _iptr(0)
{
}
/*
enables:<br>
RStringBuffer str = (RStringBuffer)new SomeSing();
upcast_explicit
RefHolder(::acdk::lang::ObjectBase* o)
: _impl(0)
, _iptr(0)
{
_init(o, static_cast<acdk::lang::Object*>(o));
}
*/
explicit
RefHolder(::acdk::lang::InterfaceBase* ibase);
/*
: _impl(0)
, _iptr(0)
{
if (ibase == 0)
return;
::acdk::lang::Object* optr = ibase->_getObjectPtr();
_init(optr, optr);
}
*/
/*
enables:<br>
RStringBuffer str = new StringBuffer();
*/
RefHolder(T* o)
: _impl(0)
, _iptr(0)
{
_init(o, o);
}
template <class OT>
upcast_explicit
RefHolder(const RefHolder<OT>& o)
: _impl(0)
, _iptr(0)
{
_init(o.iptr(), o.impl());
}
RefHolder(const RefHolder<T>& o);
/*
: _impl(o.impl())
, _iptr(o.iptr())
{
ACDK_REFCOUNTING_CODE(
if (_impl != 0)
_impl->addRef();
)
}
*/
template <class OT>
upcast_explicit
RefHolder(const InterfaceHolder<OT>& o)
: _impl(0)
, _iptr(0)
{
_init(o.iptr(), o.impl());
}
/*
enables
Integer int;
RInteger rint = int;
too dangerous missing new in RInteger rint = Integer(32);
*/
/*
RefHolder(T& t)
: _impl(0)
, _iptr(0)
{
_init(&t, &t);
}
*/
~RefHolder();
/*
{
if(_impl != 0) {
_impl->releaseRef();
}
_impl = 0;
_iptr = 0;
}
*/
/*
allows to cast from a scriptvar to a object type
*/
explicit RefHolder(const ::acdk::lang::dmi::ScriptVar& sv);
RefHolder<T>& operator=(T* o)
{
_assign(o, o);
return *this;
}
/* dangerous:
//acdk::lang::Object o;
acdk::lang::Object o;
o = acdk::lang::Object();
*/
/*
RefHolder<T>& operator=(T& o)
{
_assign(&o, &o);
return *this;
}
*/
RefHolder<T>& operator=(const RefHolder<T>& o)
{
_assign(o.iptr(), o.impl());
return *this;
}
RefHolder<T>& operator=(NilRef nil)
{
_release();
return *this;
}
bool operator==(NilRef nil) const { return _impl == 0; }
bool operator!=(NilRef nil) const { return _impl != 0; }
template <class OT> bool operator==(const RefHolder<OT>& other) const { return _impl == other.impl(); }
template <class OT> bool operator!=(const RefHolder<OT>& other) const { return _impl != other.impl(); }
/*
@throw NullPointerException if Nil
*/
inline T* getIPtr() const;
/*
@throw nothing
*/
inline T* iptr() const throw() { return _iptr; }
/*
@throw nothing
*/
inline ::acdk::lang::Object* impl() const throw() { return _impl; }
/*
@throw NullPointerException if Nil
*/
inline ::acdk::lang::Object* getImpl();
/*
@throw NullPointerException if Nil
*/
inline T* operator->() const;
/*
@throw nothing
*/
operator T* () const { return _iptr; }
#ifdef ACDK_CORE_NEED_ROBJECT_CONVERTER
/*
because there is no implizite upcast functionality
*/
operator ::acdk::lang::RObject () const { return acdk::lang::Object(*this); }
#endif
/FONT>
/*
overloading * act like a pointer
*/
T& operator *() const { return *operator->(); }
/*
overloading & to receive internal pointer
@see _ref_this
*/
T* operator &() const { return _iptr; }
/*
return the pointer to this reference (operator& will not work, because it is overloaded
*/
RefHolder<T>* _ref_this() { return this; }
/*
resets internal pointer to 0 without release them
*/
void _reset_ptr() { _iptr = 0; _impl = 0; }
/**
set the interface pointer the hard way.
This method doesn't ajust reference count
@ptr should be the address to a right casted Interface Pointer
*/
void _setInterfacePtr(void* ptr)
{
_iptr = reinterpret_cast<T*>(ptr);
}
/*
return the ClazzInfo for this type
*/
static ::acdk::lang::dmi::ClazzInfo* clazzInfo() { return T::clazzInfo(); }
//friend template <class T> class InterfaceHolder;
};
/*
InterfaceHolder is the base template class to hold references to Interfaces.
@author Roger Rene Kommer
@version $Revision: 1.43 $
@date $Date: 2005/04/13 12:57:09 $
Normally the user will not handle this directly, but
will will be declared with:<br>
ACDK_DECL_INTERFACE(InterfaceName)<br>
This will define:<br>
typedef InterfaceHolder<InterfaceName> RClassName;
@ingroup acdksmartptr
*/
template <class I>
class InterfaceHolder
: public RefHolder<I>
{
public:
typedef I Type;
protected:
void _init(::acdk::lang::Object* obj);
void _init(I* iface, ::acdk::lang::Object* obj);
void _init(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj);
void _release();
void _assign(I* iface, ::acdk::lang::Object* obj);
/*
precond: iface != 0 && obj != impl
*/
void _assing2(I* iface, ::acdk::lang::Object* obj);
void _assign(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj);
void _assign(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj);
public:
InterfaceHolder(NilRef n = Nil)
: RefHolder<I>(n)
{
}
InterfaceHolder(const InterfaceHolder<I>& iface)
: RefHolder<I>(Nil)
{
_init(iface.iptr(), iface.impl());
}
InterfaceHolder(I* iface);
/*
too dangerous:
InterfaceHolder(I& iface)
: RefHolder<I>(Nil)
{
_init(&iface, iface._getObjectPtr());
}
*/
/*
Dont work, because ambiguous call in case of:
RIterator iterator()
{
return new HashMapIterator(...);
}
explicit
InterfaceHolder(::acdk::lang::ObjectBase* impl)
: _impl(0)
, _iptr(0)
{
_init(impl, impl);
}
*/
/*
Usage sample:
RIterator iterator()
{
return new HashMapIterator(...);
}
*/
explicit
InterfaceHolder(::acdk::lang::InterfaceBase* ibase);
template <class OT>
upcast_explicit
InterfaceHolder(const RefHolder<OT>& other)
: RefHolder<I>(Nil)
{
if (other.iptr() == 0)
return;
_init(other.impl(), other.impl());
}
InterfaceHolder(I* iface, ::acdk::lang::Object* optr)
: RefHolder<I>(Nil)
{
_init(iface, optr);
}
~InterfaceHolder()
{
}
InterfaceHolder<I>& operator=(NilRef nil)
{
_release();
return *this;
}
InterfaceHolder<I>& operator=(I* iptr);
/*
too dangerous
InterfaceHolder<I>& operator=(I& iptr)
{
_assign(&iptr, iptr._getObjectPtr());
return *this;
}
*/
InterfaceHolder<I>& operator=(const InterfaceHolder<I>& other)
{
_assign(other.iptr(), other.impl());
return *this;
}
InterfaceHolder<I>& assign(I* iface, ::acdk::lang::Object* obj)
{
_assign(iface, obj);
return *this;
}
/*
@trow NullPointerException on Nil
*/
I* operator->() const;
bool operator==(NilRef nil) const throw();
bool operator!=(NilRef nil) const throw();
#if defined(ACDK_MEMBERTEMPL_TEMPLATE_TEMPLATE)
template <class OT> bool operator==(const RefHolder<OT>& other) const throw();
template <class OT> bool operator!=(const RefHolder<OT>& other) const throw();
#else
/FONT>
template <class OT> bool operator==(const RefHolder<OT>& other) const throw()
{ return InterfaceHolder<I>::_impl == other.impl(); }
template <class OT> bool operator!=(const RefHolder<OT>& other) const throw()
{ return InterfaceHolder<I>::_impl != other.impl(); }
#endif //defined(ACDK_MEMBERTEMPL_TEMPLATE_TEMPLATE)
/*
@trow NullPointerException on Nil
*/
inline ::acdk::lang::Object* getImpl() const;
/*
@throw nothing
*/
inline ::acdk::lang::Object* impl() const throw();
I* iptr() const throw () { return this->_iptr; }
static ::acdk::lang::dmi::ClazzInfo* clazzInfo() { return I::clazzInfo(); }
#ifdef ACDK_CORE_NEED_ROBJECT_CONVERTER
/*
because there is no implizite upcast functionality
*/
operator ::acdk::lang::RObject () const { return ::acdk::lang::RObject(*this); }
#endif //ACDK_CORE_NEED_ROBJECT_CONVERTER
operator I*() throw() { return this->_iptr; }
I& operator *() const { return *operator->(); }
I* operator &() const throw() { return this->_iptr; }
InterfaceHolder<I>* _ref_this() { return this; }
};
/*
The base of interfaces
@ingroup acdkmacros
@ingroup acdkmetainfo
*/
#define ACDK_INTERFACEBASE : virtual public ::acdk::lang::InterfaceBase
/*
ThrowableHolder is the base template class to hold references to Throwables.
@author Roger Rene Kommer
@version $Revision: 1.43 $
@date $Date: 2005/04/13 12:57:09 $
Normally the user will not handle this directly, but
will will be declared with:<br>
ACDK_DECL_THROWABLE(exception)<br>
This will define:<br>
typedef ThrowableHolder<Exception> RException;
@ingroup acdksmartptr
*/
template<class T, class S>
class ThrowableHolder
: public S
{
protected:
public:
typedef T Type;
ThrowableHolder(NilRef n = Nil)
: S(n)
{
}
ThrowableHolder(T* o)
: S(o)
{
}
template <class OT>
upcast_explicit
ThrowableHolder(const RefHolder<OT>& o)
: S(o)
{
}
explicit
ThrowableHolder(::acdk::lang::Object* o)
: S(o)
{
}
~ThrowableHolder()
{
}
ThrowableHolder<T, S>& operator=(T* o)
{
S::operator=(o);
return *this;
}
ThrowableHolder<T, S>& operator=(const ThrowableHolder<T, S>& o)
{
S::operator=(o);
return *this;
}
ThrowableHolder<T, S>& operator=(NilRef nil)
{
if (this->_impl == 0)
return *this;
S::operator=(nil);
return *this;
}
bool operator==(NilRef nil) const throw() { return this->_impl == 0; }
bool operator!=(NilRef nil) const throw() { return this->_impl != 0; }
template <class OT> bool operator==(const RefHolder<OT>& other) const throw() { return this->_impl == other.impl(); }
template <class OT> bool operator!=(const RefHolder<OT>& other) const throw() { return this->_impl != other.impl(); }
inline T* getIPtr() const;
inline T* iptr() const
{
T* ret;
REFH_TRYDOWNCAST_OBJ(ret, T, this->_iptr);
return ret;
}
inline ::acdk::lang::Object* impl() const { return this->_impl; }
inline ::acdk::lang::Object* getImpl();
inline T* operator->() const;
ThrowableHolder<T, S>* _ref_this() { return this; }
#ifdef ACDK_CORE_NEED_ROBJECT_CONVERTER
/*
because there is no implizite upcast functionality
*/
operator ::acdk::lang::RObject () const { return ::acdk::lang::RObject(*this); }
#endif //ACDK_CORE_NEED_ROBJECT_CONVERTER
operator T* () const { return iptr(); }
T& operator *() const { return *operator->(); }
static ::acdk::lang::dmi::ClazzInfo* clazzInfo() { return T::clazzInfo(); }
}; |
2005/5/9
RefHolder3.h
