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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_TOOLS_REF_HXX
#define INCLUDED_TOOLS_REF_HXX
#include <tools/toolsdllapi.h>
#include <vector>
namespace tools {
template<typename T> class SvRef {
public:
SvRef(): pObj(0) {}
SvRef(SvRef const & rObj): pObj(rObj.pObj)
{ if (pObj != 0) pObj->AddNextRef(); }
SvRef(T * pObjP): pObj(pObjP) { if (pObj != 0) pObj->AddRef(); }
~SvRef() { if (pObj != 0) pObj->ReleaseReference(); }
void Clear() {
if (pObj != 0) {
T * pRefObj = pObj;
pObj = 0;
pRefObj->ReleaseReference();
}
}
SvRef & operator =(SvRef const & rObj) {
if (rObj.pObj != 0) {
rObj.pObj->AddNextRef();
}
T * pRefObj = pObj;
pObj = rObj.pObj;
if (pRefObj != 0) {
pRefObj->ReleaseReference();
}
return *this;
}
bool Is() const { return pObj != 0; }
T * operator &() const { return pObj; }
T * operator ->() const { return pObj; }
T & operator *() const { return *pObj; }
operator T *() const { return pObj; }
protected:
T * pObj;
};
}
template<typename T>
class SvRefMemberList : private std::vector<T>
{
private:
typedef typename std::vector<T> base_t;
public:
using base_t::size;
using base_t::front;
using base_t::back;
using base_t::operator[];
using base_t::begin;
using base_t::end;
using typename base_t::iterator;
using typename base_t::const_iterator;
using base_t::rbegin;
using base_t::rend;
using typename base_t::reverse_iterator;
using base_t::empty;
inline ~SvRefMemberList() { clear(); }
inline void clear()
{
for( typename base_t::const_iterator it = base_t::begin(); it != base_t::end(); ++it )
{
T p = *it;
if( p )
p->ReleaseReference();
}
base_t::clear();
}
inline void push_back( T p )
{
base_t::push_back( p );
p->AddRef();
}
inline void insert(const SvRefMemberList& rOther)
{
for( typename base_t::const_iterator it = rOther.begin(); it != rOther.end(); ++it )
{
push_back(*it);
}
}
inline T pop_back()
{
T p = base_t::back();
base_t::pop_back();
if( p )
p->ReleaseReference();
return p;
}
};
#define SV_NO_DELETE_REFCOUNT 0x80000000
class TOOLS_DLLPUBLIC SvRefBase
{
sal_uIntPtr nRefCount;
protected:
virtual ~SvRefBase();
virtual void QueryDelete();
public:
SvRefBase() { nRefCount = SV_NO_DELETE_REFCOUNT; }
SvRefBase( const SvRefBase & /* rObj */ )
{ nRefCount = SV_NO_DELETE_REFCOUNT; }
SvRefBase & operator = ( const SvRefBase & ) { return *this; }
void RestoreNoDelete()
{
if( nRefCount < SV_NO_DELETE_REFCOUNT )
nRefCount += SV_NO_DELETE_REFCOUNT;
}
sal_uIntPtr AddNextRef() { return ++nRefCount; }
sal_uIntPtr AddRef()
{
if( nRefCount >= SV_NO_DELETE_REFCOUNT )
nRefCount -= SV_NO_DELETE_REFCOUNT;
return ++nRefCount;
}
void ReleaseReference()
{
if( !--nRefCount )
QueryDelete();
}
sal_uIntPtr ReleaseRef()
{
sal_uIntPtr n = --nRefCount;
if( !n )
QueryDelete();
return n;
}
sal_uIntPtr GetRefCount() const { return nRefCount; }
};
typedef tools::SvRef<SvRefBase> SvRefBaseRef;
class SvCompatWeakHdl : public SvRefBase
{
friend class SvCompatWeakBase;
void* _pObj;
SvCompatWeakHdl( void* pObj ) : _pObj( pObj ) {}
public:
void ResetWeakBase( ) { _pObj = 0; }
void* GetObj() { return _pObj; }
};
typedef tools::SvRef<SvCompatWeakHdl> SvCompatWeakHdlRef;
class SvCompatWeakBase
{
SvCompatWeakHdlRef _xHdl;
public:
SvCompatWeakHdl* GetHdl() { return _xHdl; }
// does not use Initalizer due to compiler warnings
SvCompatWeakBase( void* pObj ) { _xHdl = new SvCompatWeakHdl( pObj ); }
~SvCompatWeakBase() { _xHdl->ResetWeakBase(); }
};
#define SV_DECL_COMPAT_WEAK( ClassName ) \
class ClassName##Weak \
{ \
SvCompatWeakHdlRef _xHdl; \
public: \
inline ClassName##Weak( ) {} \
inline ClassName##Weak( ClassName* pObj ) { \
if( pObj ) _xHdl = pObj->GetHdl(); } \
inline void Clear() { _xHdl.Clear(); } \
inline ClassName##Weak& operator = ( ClassName * pObj ) { \
_xHdl = pObj ? pObj->GetHdl() : 0; return *this; } \
inline bool Is() const { \
return _xHdl.Is() && _xHdl->GetObj(); } \
inline ClassName * operator & () const { \
return (ClassName*) ( _xHdl.Is() ? _xHdl->GetObj() : 0 ); } \
inline ClassName * operator -> () const { \
return (ClassName*) ( _xHdl.Is() ? _xHdl->GetObj() : 0 ); } \
inline ClassName & operator * () const { \
return *(ClassName*) _xHdl->GetObj(); } \
inline operator ClassName * () const { \
return (ClassName*) (_xHdl.Is() ? _xHdl->GetObj() : 0 ); } \
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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