// -*- 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/RefHolder4.h,v 1.9 2005/04/09 19:26:56 kommer Exp $
/*
RefHolder4
Based on RefHolder3
use bool variable for caching if acdk::lang::Object is on Stack
*/
/*
RefHolder is the base template class to hold references.
@author Roger Rene Kommer
@version $Revision: 1.9 $
@date $Date: 2005/04/09 19:26:56 $
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;
*/
/*
No implicit convertion from RAClass to acdk::lang::Object
possible. For convenience introduce a
operator acdk::lang::Object();
*/
//#define ACDK_CORE_NEED_ROBJECT_CONVERTER
#define upcast_explicit explicit
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;
bool _isStackRef;
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;
protected:
void _initObject(::acdk::lang::Object* obj)
{
_impl = obj;
_isStackRef = _impl->isStackRef();
if (_isStackRef == false) {
ACDK_REFCOUNTING_CODE( _impl->addRef(); )
}
}
void _initObject(::acdk::lang::Object* obj, bool isstackref)
{
_impl = obj;
_isStackRef = isstackref;
if (_isStackRef == false) {
ACDK_REFCOUNTING_CODE( _impl->addRef(); )
}
}
void _initObjectBase(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj)
{
if (obj == 0)
return;
_iptr = dynamic_cast<T*>(iface);
if (_iptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_initObject(obj);
}
void _initObjectBase(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (obj == 0)
return;
_iptr = dynamic_cast<T*>(iface);
if (_iptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_initObject(obj, isstackref);
}
void _initInterfaceBase(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj)
{
if (obj == 0)
return;
_iptr = dynamic_cast<T*>(iface->_getObjectPtr());
if (_iptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_initObject(obj);
}
void _initInterfaceBase(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (obj == 0)
return;
_iptr = dynamic_cast<T*>(iface->_getObjectPtr());
if (_iptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_initObject(obj, isstackref);
}
void _initT(T* iface, ::acdk::lang::Object* obj)
{
if (iface == 0)
return;
_iptr = iface;
_initObject(obj);
}
void _initT(T* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (iface == 0)
return;
_iptr = iface;
_initObject(obj, isstackref);
}
void _init(T* iface, ::acdk::lang::Object* obj)
{
_initT(iface, obj);
}
void _init(T* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_initT(iface, obj, isstackref);
}
void _init(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj)
{
_initObjectBase(iface, obj);
}
void _init(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_initObjectBase(iface, obj, isstackref);
}
void _init(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj)
{
_initInterfaceBase(iface, obj);
}
void _init(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_initInterfaceBase(iface, obj, isstackref);
}
void _release()
{
if (_impl == 0 || _isStackRef == true)
return;
ACDK_REFCOUNTING_CODE( ::acdk::lang::Object* simpl = _impl; )
_impl = 0;
_iptr = 0;
ACDK_REFCOUNTING_CODE( simpl->releaseRef(); )
}
void _assignT(T* iface, ::acdk::lang::Object* obj)
{
if (_impl == obj)
return;
bool sr = false;
if (obj != 0) {
sr = obj->isStackRef();
if (sr == false) {
ACDK_REFCOUNTING_CODE( obj->addRef(); )
}
}
if (_impl != 0 && _isStackRef == false) {
ACDK_REFCOUNTING_CODE( ::acdk::lang::Object* simpl = _impl; )
_impl = 0;
_iptr = 0;
ACDK_REFCOUNTING_CODE( simpl->releaseRef(); )
}
_impl = obj;
_iptr = iface;
_isStackRef = sr;
}
void _assignT(T* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (_impl == obj)
return;
if (obj != 0 && isstackref == false) {
ACDK_REFCOUNTING_CODE( obj->addRef(); )
}
if (_impl != 0 && _isStackRef == false) {
ACDK_REFCOUNTING_CODE( ::acdk::lang::Object* simpl = _impl; )
_impl = 0;
_iptr = 0;
ACDK_REFCOUNTING_CODE( simpl->releaseRef(); )
}
_impl = obj;
_iptr = iface;
_isStackRef = isstackref;
}
void _assignT2(T* iface, ::acdk::lang::Object* obj)
{
bool sr = obj->isStackRef();
if (sr == false) {
ACDK_REFCOUNTING_CODE( obj->addRef(); )
}
if (_impl != 0 && _isStackRef == false) {
ACDK_REFCOUNTING_CODE( ::acdk::lang::Object* simpl = _impl; )
_impl = 0;
_iptr = 0;
ACDK_REFCOUNTING_CODE( simpl->releaseRef(); )
}
_impl = obj;
_iptr = iface;
_isStackRef = sr;
}
void _assign2(T* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (isstackref == false) {
ACDK_REFCOUNTING_CODE( obj->addRef(); )
}
if (_impl != 0 && _isStackRef == false) {
ACDK_REFCOUNTING_CODE( ::acdk::lang::Object* simpl = _impl; )
_impl = 0;
_iptr = 0;
ACDK_REFCOUNTING_CODE( simpl->releaseRef(); )
}
_impl = obj;
_iptr = iface;
_isStackRef = isstackref;
}
void _assign(T* iface, ::acdk::lang::Object* obj) { _assignT(iface, obj); }
void _assign(T* iface, ::acdk::lang::Object* obj, bool isstackref) { _assignT(iface, obj, isstackref); }
/*
precond: iface != 0 && obj != impl
*/
void _assignObjectBase(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj)
{
if (obj == _impl)
return;
if (obj != 0) {
T* tptr = dynamic_cast<T*>(iface);
if (tptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_assign2(tptr, obj);
} else
_release();
}
void _assignObjectBase(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (obj == _impl)
return;
if (obj != 0) {
T* tptr = dynamic_cast<T*>(iface);
if (tptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_assign2(tptr, obj, isstackref);
} else
_release();
}
void _assignInterfaceBase(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj)
{
if (obj == _impl)
return;
if (iface != 0) {
T* tptr = dynamic_cast<T*>(iface->_getObjectPtr());
if (tptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_assign2(tptr, obj);
} else
_release();
}
void _assignInterfaceBase(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
if (obj == _impl)
return;
if (iface != 0) {
T* tptr = dynamic_cast<T*>(iface->_getObjectPtr());
if (tptr == 0)
::acdk::lang::ObjectBase::_throwBadCastException();
_assign2(tptr, obj, isstackref);
} else
_release();
}
void _assign(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj)
{
_assignObjectBase(iface, obj);
}
void _assign(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_assignObjectBase(iface, obj, isstackref);
}
void _assign(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj)
{
_assignInterfaceBase(iface, obj);
}
void _assign(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_assignInterfaceBase(iface, obj, isstackref);
}
public:
/* default constructors */
RefHolder(NilRef n = Nil)
: _impl(0)
, _iptr(0)
, _isStackRef(false)
{
}
/*
enables:<br>
RStringBuffer str = (RStringBuffer)new SomeSing();
explicit
RefHolder(::acdk::lang::ObjectBase* o)
: _impl(0)
, _iptr(0)
{
_init(o, static_cast<acdk::lang::Object*>(o));
}
*/
explicit
RefHolder(::acdk::lang::InterfaceBase* ibase)
: _iptr(0)
, _impl(0)
, _isStackRef(false)
{
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)
, _isStackRef(false)
{
_init(o, o);
}
template <class OT>
explicit
RefHolder(const RefHolder<OT>& o)
: _impl(0)
, _iptr(0)
, _isStackRef(false)
{
_init(o.iptr(), o.impl(), o.isStackRef());
}
RefHolder(const RefHolder<T>& o)
: _impl(o.impl())
, _iptr(o.iptr())
, _isStackRef(o.isStackRef())
{
if (_isStackRef == false) {
ACDK_REFCOUNTING_CODE(
if (_impl != 0) {
_impl->addRef();
_isStackRef = o.isStackRef();
}
)
}
}
template <class OT>
explicit
RefHolder(const InterfaceHolder<OT>& o)
: _impl(0)
, _iptr(0)
, _isStackRef(false)
{
_init(o.iptr(), o.impl(), o.isStackRef());
}
/*
enables
Integer int;
RInteger rint = int;
*/
RefHolder(T& t)
: _impl(0)
, _iptr(0)
, _isStackRef(false)
{
_init(&t, &t);
}
~RefHolder()
{
_release();
}
RefHolder<T>& operator=(T* o)
{
_assign(o, o);
return *this;
}
RefHolder<T>& operator=(T& o)
{
_assign(&o, &o);
return *this;
}
RefHolder<T>& operator=(const RefHolder<T>& o)
{
_assign(o.iptr(), o.impl(), o.isStackRef());
return *this;
}
RefHolder<T>& operator=(NilRef nil)
{
_release();
return *this;
}
bool operator==(NilRef nil) { return _impl == 0; }
bool operator!=(NilRef nil) { return _impl != 0; }
template <class OT> bool operator==(const RefHolder<OT>& other) { return _impl == other.impl(); }
template <class OT> bool operator!=(const RefHolder<OT>& other) { return _impl != other.impl(); }
inline T* getIPtr() const
{
ACDK_ASSERT_NULL_PTR(_iptr)
return _iptr;
}
inline T* iptr() const { return _iptr; }
inline ::acdk::lang::Object* impl() const { return _impl; }
inline ::acdk::lang::Object* getImpl()
{
ACDK_ASSERT_NULL_PTR(_impl);
return _impl;
}
inline T* operator->()
{
ACDK_ASSERT_NULL_PTR(_iptr);
return _iptr;
}
operator T* () const { return _iptr; }
#ifdef ACDK_CORE_NEED_ROBJECT_CONVERTER
/*
because there is no implizite upcast functionality
*/
operator ::acdk::lang::RObject () { return acdk::lang::Object(*this); }
#endif
/FONT>
T& operator *() { return *operator->(); }
T* operator &() const { return _iptr; }
RefHolder<T>* _ref_this() { return this; }
static ::acdk::lang::dmi::ClazzInfo* clazzInfo() { return T::clazzInfo(); }
//friend class InterfaceHolder<T>;
bool isStackRef() const { return _isStackRef; }
};
/*
InterfaceHolder is the base template class to hold references to Interfaces.
@author Roger Rene Kommer
@version $Revision: 1.9 $
@date $Date: 2005/04/09 19:26:56 $
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;
*/
template <class I>
class InterfaceHolder
: public RefHolder<I>
{
public:
typedef I Type;
protected:
void _init(I* iface, ::acdk::lang::Object* obj)
{
_initT(iface, obj);
}
void _init(I* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_initT(iface, obj, isstackref);
}
void _init(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj)
{
_initInterfaceBase(iface, obj);
}
void _init(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_initInterfaceBase(iface, obj, isstackref);
}
void _assign(I* iface, ::acdk::lang::Object* obj)
{
_assignT(iface, obj);
}
void _assign(I* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_assignT(iface, obj, isstackref);
}
void _assign(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj)
{
_assignObjectBase(iface, obj);
}
void _assign(::acdk::lang::ObjectBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_assignObjectBase(iface, obj, isstackref);
}
void _assign(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj)
{
_assignInterfaceBase(iface, obj);
}
void _assign(::acdk::lang::InterfaceBase* iface, ::acdk::lang::Object* obj, bool isstackref)
{
_assignInterfaceBase(iface, obj, isstackref);
}
public:
InterfaceHolder(NilRef n = Nil)
: RefHolder<I>(n)
{
}
InterfaceHolder(const InterfaceHolder<I>& iface)
: RefHolder<I>(Nil)
{
_init(iface.iptr(), iface.impl(), iface.isStackRef());
}
InterfaceHolder(I* iface)
: RefHolder<I>(Nil)
{
_init(iface, iface == 0 ? 0 : iface->_getObjectPtr());
}
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)
: RefHolder<I>(Nil)
{
if (ibase == 0)
return;
::acdk::lang::Object* optr = ibase->_getObjectPtr();
_init(optr, optr);
}
template <class OT>
explicit
InterfaceHolder(const RefHolder<OT>& other)
: RefHolder<I>(Nil)
{
if (other.iptr() == 0)
return;
_init(other.impl(), other.impl(), other.isStackRef());
}
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)
{
if (iptr == 0)
_release();
else
_assign(iptr, iptr->_getObjectPtr());
return *this;
}
InterfaceHolder<I>& operator=(I& iptr)
{
_assign(&iptr, iptr._getObjectPtr());
return *this;
}
InterfaceHolder<I>& operator=(const InterfaceHolder<I>& other)
{
_assign(other.iptr(), other.impl(), other.isStackRef());
return *this;
}
InterfaceHolder<I>& assign(I* iface, ::acdk::lang::Object* obj)
{
_assign(iface, obj);
return *this;
}
I* operator->()
{
ACDK_ASSERT_NULL_PTR(_iptr)
return _iptr;
}
bool operator==(NilRef nil) { return _impl == 0; }
bool operator!=(NilRef nil) { return _impl != 0; }
template <class OT> bool operator==(const RefHolder<OT>& other) { return _impl == other.impl(); }
template <class OT> bool operator!=(const RefHolder<OT>& other) { return _impl != other.impl(); }
inline ::acdk::lang::Object* getImpl() const
{
ACDK_ASSERT_NULL_PTR(_iptr)
return const_cast< ::acdk::lang::Object*>(_impl);
}
inline ::acdk::lang::Object* impl() const { return const_cast< ::acdk::lang::Object*>(_impl); }
I* iptr() const { return _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 () { return ::acdk::lang::RObject(*this); }
#endif //ACDK_CORE_NEED_ROBJECT_CONVERTER
operator I*() { return _iptr; }
I& operator *() { return *operator->(); }
I* operator &() const { return _iptr; }
InterfaceHolder<I>* _ref_this() { return this; }
};
/*
The base of interfaces
*/
#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: 1.9 $
@date $Date: 2005/04/09 19:26:56 $
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;
*/
template<class T, class S>
class ThrowableHolder
: public S
{
protected:
public:
ThrowableHolder(NilRef n = Nil)
: S(n)
{
}
ThrowableHolder(T* 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 (_impl == 0)
return *this;
S::operator=(nil);
return *this;
}
bool operator==(NilRef nil) { return _impl == 0; }
bool operator!=(NilRef nil) { return _impl != 0; }
template <class OT> bool operator==(const RefHolder<OT>& other) { return _impl == other.impl(); }
template <class OT> bool operator!=(const RefHolder<OT>& other) { return _impl != other.impl(); }
inline T* getIPtr() const
{
ACDK_ASSERT_NULL_PTR(_iptr)
T* ret;
REFH_TRYDOWNCAST_OBJ(ret, T, _iptr);
return ret;
}
inline T* iptr() const
{
T* ret;
REFH_TRYDOWNCAST_OBJ(ret, T, _iptr);
return ret;
}
inline ::acdk::lang::Object* impl() const { return _impl; }
inline ::acdk::lang::Object* getImpl()
{
ACDK_ASSERT_NULL_PTR(_iptr)
return _impl;
}
inline T* operator->()
{
ACDK_ASSERT_NULL_PTR(_iptr)
return iptr();
}
#ifdef ACDK_CORE_NEED_ROBJECT_CONVERTER
/*
because there is no implizite upcast functionality
*/
operator ::acdk::lang::RObject () { return ::acdk::lang::RObject(*this); }
#endif //ACDK_CORE_NEED_ROBJECT_CONVERTER
operator T* () const { return iptr(); }
T& operator *() { return *operator->(); }
}; |