481 lines
12 KiB
C++
481 lines
12 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NL_SMARTPTR_INLINE_H
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#define NL_SMARTPTR_INLINE_H
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namespace NLMISC
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{
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// ***************************************************************************
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#ifdef NL_OS_WINDOWS
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#define SMART_INLINE __forceinline
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#else
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#define SMART_INLINE inline
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#endif
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// ***************************************************************************
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inline CRefCount::~CRefCount()
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{
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// This is the destruction of the objet.
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#ifdef NL_DEBUG
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nlassert(crefs==0);
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#endif
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// If a CRefPtr still points on me...
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if(!pinfo->IsNullPtrInfo)
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{
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// inform them of my destruction.
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pinfo->Ptr= NULL;
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}
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}
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// ***************************************************************************
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// ***************************************************************************
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// CSmartPtr.
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// ***************************************************************************
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// ***************************************************************************
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// ***************************************************************************
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template<class T>
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inline CSmartPtr<T>::~CSmartPtr(void)
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{
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SMART_TRACE("dtor()");
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if(Ptr)
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{
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#ifdef NL_DEBUG
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nlassert(Ptr->crefs>=0);
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#endif
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if (--(Ptr->crefs) == 0)
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delete Ptr;
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Ptr=NULL;
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}
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}
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template<class T>
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SMART_INLINE CSmartPtr<T>& CSmartPtr<T>::operator=(T* p)
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{
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SMART_TRACE("ope=(T*)Start");
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// Implicit manage auto-assignation.
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if(p)
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p->crefs++;
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if(Ptr)
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{
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if (--(Ptr->crefs) == 0)
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delete Ptr;
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}
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Ptr = p;
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SMART_TRACE("ope=(T*)End");
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return *this;
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}
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template<class T>
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SMART_INLINE CSmartPtr<T>& CSmartPtr<T>::operator=(const CSmartPtr &p)
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{
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return operator=(p.Ptr);
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}
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template<class T>
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SMART_INLINE bool CSmartPtr<T>::operator<(const CSmartPtr &p) const
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{
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return Ptr<p.Ptr;
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}
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// ***************************************************************************
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// ***************************************************************************
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// CRefPtr.
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// ***************************************************************************
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// ***************************************************************************
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// ***************************************************************************
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template<class T>
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SMART_INLINE void CRefPtr<T>::unRef() const
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{
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pinfo->RefCount--;
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if(pinfo->RefCount==0)
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{
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// In CRefPtr, Never delete the object.
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// We may be in the case that this==NullPtrInfo, and our NullPtrInfo has done a total round. Test it.
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if(pinfo->IsNullPtrInfo)
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{
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// This should not happens, but I'm not sure :) ...
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// Reset the NullPtrInfo to a middle round.
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pinfo->RefCount= 0x7FFFFFFF;
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}
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else
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{
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// If the CRefPtr still point to a valid object.
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if(pinfo->Ptr)
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{
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// Inform the Object that no more CRefPtr points on it.
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pinfo->Ptr->pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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}
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// Then delete the pinfo.
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delete pinfo;
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}
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}
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}
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// ***************************************************************************
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// Cons - dest.
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template <class T> inline CRefPtr<T>::CRefPtr()
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{
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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Ptr= NULL;
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REF_TRACE("Smart()");
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}
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template <class T> inline CRefPtr<T>::CRefPtr(T *v)
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{
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Ptr= v;
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if(v)
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{
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// If no CRefPtr handles v, create a pinfo ref...
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if(v->pinfo->IsNullPtrInfo)
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v->pinfo=new CRefCount::CPtrInfo(v);
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pinfo=v->pinfo;
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// v is now used by this.
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pinfo->RefCount++;
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#ifdef NL_DEBUG
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nlassert(v == const_cast<T*>(static_cast<T const*>(pinfo->Ptr)));
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#endif
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}
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else
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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REF_TRACE("Smart(T*)");
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}
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template <class T> inline CRefPtr<T>::CRefPtr(const CRefPtr ©)
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{
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pinfo=copy.pinfo;
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pinfo->RefCount++;
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Ptr= const_cast<T*>(static_cast<T const*>(pinfo->Ptr));
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REF_TRACE("SmartCopy()");
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}
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template <class T> inline CRefPtr<T>::~CRefPtr(void)
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{
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REF_TRACE("~Smart()");
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unRef();
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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Ptr= NULL;
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}
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// ***************************************************************************
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// Operators=.
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template <class T> CRefPtr<T> &CRefPtr<T>::operator=(T *v)
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{
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REF_TRACE("ope=(T*)Start");
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Ptr= v;
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if(v)
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{
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// If no CRefPtr handles v, create a pinfo ref...
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if(v->pinfo->IsNullPtrInfo)
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v->pinfo=new CRefCount::CPtrInfo(v);
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// The auto equality test is implicitly done by upcounting first "v", then downcounting "this".
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v->pinfo->RefCount++;
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unRef();
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pinfo= v->pinfo;
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#ifdef NL_DEBUG
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nlassert(v == const_cast<T*>(static_cast<T const*>(pinfo->Ptr)));
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#endif
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}
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else
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{
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unRef();
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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}
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REF_TRACE("ope=(T*)End");
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return *this;
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}
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template <class T> CRefPtr<T> &CRefPtr<T>::operator=(const CRefPtr ©)
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{
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REF_TRACE("ope=(Smart)Start");
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// The auto equality test is implicitly done by upcounting first "copy", then downcounting "this".
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copy.pinfo->RefCount++;
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unRef();
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pinfo=copy.pinfo;
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// Must Refresh the ptr.
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Ptr= const_cast<T*>(static_cast<T const*>(pinfo->Ptr));
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REF_TRACE("ope=(Smart)End");
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return *this;
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}
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// ***************************************************************************
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// Operations.
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template <class T> void CRefPtr<T>::kill()
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{
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REF_TRACE("SmartKill");
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T *ptr= const_cast<T*>(static_cast<T const*>(pinfo->Ptr));
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// First, release the refptr.
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unRef();
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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Ptr= NULL;
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// Then delete the pointer.
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if(ptr)
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delete ptr;
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}
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// ***************************************************************************
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// Cast.
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template <class T> inline CRefPtr<T>::operator T*() const
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{
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REF_TRACE("SmartCast T*()");
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// Refresh Ptr.
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// NB: It is preferable (faster) here to just copy than testing if NULL and set NULL if necessary.
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// (static_cast is like a simple copy but for multiple inheritance)
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Ptr= const_cast<T*>(static_cast<T const*>(pinfo->Ptr));
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return Ptr;
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}
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// ***************************************************************************
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// Operators.
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template <class T> inline T& CRefPtr<T>::operator*(void) const
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{
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REF_TRACE("Smart *()");
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return *Ptr;
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}
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template <class T> inline T* CRefPtr<T>::operator->(void) const
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{
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REF_TRACE("Smart ->()");
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return Ptr;
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}
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// ***************************************************************************
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// ***************************************************************************
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// CVirtualRefPtr.
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// ***************************************************************************
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// ***************************************************************************
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// ***************************************************************************
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template<class T>
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SMART_INLINE void CVirtualRefPtr<T>::unRef() const
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{
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pinfo->RefCount--;
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if(pinfo->RefCount==0)
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{
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// In CVirtualRefPtr, Never delete the object.
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// We may be in the case that this==NullPtrInfo, and our NullPtrInfo has done a total round. Test it.
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if(pinfo->IsNullPtrInfo)
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{
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// This should not happens, but I'm not sure :) ...
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// Reset the NullPtrInfo to a middle round.
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pinfo->RefCount= 0x7FFFFFFF;
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}
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else
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{
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// If the CVirtualRefPtr still point to a valid object.
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if(pinfo->Ptr)
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{
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// Inform the Object that no more CVirtualRefPtr points on it.
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pinfo->Ptr->pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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}
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// Then delete the pinfo.
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delete pinfo;
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}
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}
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}
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// ***************************************************************************
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// Cons - dest.
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template <class T> inline CVirtualRefPtr<T>::CVirtualRefPtr()
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{
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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Ptr= NULL;
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REF_TRACE("Smart()");
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}
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template <class T> inline CVirtualRefPtr<T>::CVirtualRefPtr(T *v)
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{
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Ptr= v;
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if(v)
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{
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// If no CVirtualRefPtr handles v, create a pinfo ref...
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if(v->pinfo->IsNullPtrInfo)
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v->pinfo=new CRefCount::CPtrInfo(static_cast<CVirtualRefCount const*>(v)); // v MUST derive from CVirtualRefCount
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pinfo=v->pinfo;
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// v is now used by this.
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pinfo->RefCount++;
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#ifdef NL_DEBUG
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nlassert(v == const_cast<T*>(dynamic_cast<T const*>(static_cast<CVirtualRefCount const*>(pinfo->Ptr))));
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#endif
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}
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else
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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REF_TRACE("Smart(T*)");
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}
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template <class T> inline CVirtualRefPtr<T>::CVirtualRefPtr(const CVirtualRefPtr ©)
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{
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pinfo=copy.pinfo;
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pinfo->RefCount++;
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Ptr= const_cast<T*>(dynamic_cast<T const*>(static_cast<CVirtualRefCount const*>(pinfo->Ptr)));
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nlassert(Ptr != NULL || pinfo->Ptr == NULL);
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REF_TRACE("SmartCopy()");
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}
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template <class T> inline CVirtualRefPtr<T>::~CVirtualRefPtr(void)
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{
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REF_TRACE("~Smart()");
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unRef();
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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Ptr= NULL;
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}
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// ***************************************************************************
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// Operators=.
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template <class T> CVirtualRefPtr<T> &CVirtualRefPtr<T>::operator=(T *v)
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{
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REF_TRACE("ope=(T*)Start");
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Ptr= v;
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if(v)
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{
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// If no CVirtualRefPtr handles v, create a pinfo ref...
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if(v->pinfo->IsNullPtrInfo)
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v->pinfo=new CRefCount::CPtrInfo(static_cast<CVirtualRefCount const*>(v)); // v MUST derive from CVirtualRefCount
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// The auto equality test is implicitly done by upcounting first "v", then downcounting "this".
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v->pinfo->RefCount++;
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unRef();
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pinfo= v->pinfo;
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#ifdef NL_DEBUG
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nlassert(v == const_cast<T*>(dynamic_cast<T const*>(static_cast<CVirtualRefCount const*>(pinfo->Ptr))));
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#endif
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}
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else
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{
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unRef();
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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}
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REF_TRACE("ope=(T*)End");
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return *this;
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}
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template <class T> CVirtualRefPtr<T> &CVirtualRefPtr<T>::operator=(const CVirtualRefPtr ©)
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{
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REF_TRACE("ope=(Smart)Start");
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// The auto equality test is implicitly done by upcounting first "copy", then downcounting "this".
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copy.pinfo->RefCount++;
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unRef();
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pinfo=copy.pinfo;
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// Must Refresh the ptr.
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Ptr= const_cast<T*>(dynamic_cast<T const*>(static_cast<CVirtualRefCount const*>(pinfo->Ptr)));
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nlassert(Ptr != NULL || pinfo->Ptr == NULL);
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REF_TRACE("ope=(Smart)End");
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return *this;
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}
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// ***************************************************************************
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// Operations.
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template <class T> void CVirtualRefPtr<T>::kill()
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{
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REF_TRACE("SmartKill");
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T *ptr= const_cast<T*>(dynamic_cast<T const*>(static_cast<CVirtualRefCount const*>(pinfo->Ptr)));
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nlassert(ptr != NULL || pinfo->Ptr == NULL);
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// First, release the refptr.
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unRef();
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pinfo= static_cast<CRefCount::CPtrInfo*>(&CRefCount::NullPtrInfo);
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Ptr= NULL;
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// Then delete the pointer.
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if(ptr)
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delete ptr;
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}
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// ***************************************************************************
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// Cast.
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template <class T> inline CVirtualRefPtr<T>::operator T*() const
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{
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REF_TRACE("SmartCast T*()");
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// Refresh Ptr if necessary.
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// NB: It is preferable (faster) here to test if NULL and set NULL if necessary, than dynamic_casting the ptr.
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if (pinfo->Ptr == NULL)
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Ptr = NULL;
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return Ptr;
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}
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// ***************************************************************************
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// Operators.
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template <class T> inline T& CVirtualRefPtr<T>::operator*(void) const
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{
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REF_TRACE("Smart *()");
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return *Ptr;
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}
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template <class T> inline T* CVirtualRefPtr<T>::operator->(void) const
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{
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REF_TRACE("Smart ->()");
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return Ptr;
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}
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// ***************************************************************************
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#undef SMART_INLINE
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} // NLMISC
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#endif // NL_SMARTPTR_INLINE_H
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