100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
#pragma once
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/****************************************************************************
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Copyright (c) 2010, Radon Labs GmbH
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "core/refcounted.h"
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//------------------------------------------------------------------------------
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namespace Threading
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{
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class ObjectRef : public Core::RefCounted
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{
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__DeclareClass(ObjectRef);
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public:
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/// constructor
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ObjectRef();
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/// destructor
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virtual ~ObjectRef();
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/// return true if the ObjectRef points to a valid object
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bool IsValid() const;
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/// validate the ref with a pointer to a target object (must be RefCounted)
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template<class TYPE> void Validate(TYPE* obj);
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/// invalidate the ref
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void Invalidate();
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/// get pointer to object
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template<class TYPE> TYPE* Ref() const;
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private:
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Core::RefCounted* volatile ref;
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};
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//------------------------------------------------------------------------------
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/**
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*/
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inline bool
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ObjectRef::IsValid() const
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{
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return (0 != this->ref);
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}
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//------------------------------------------------------------------------------
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/**
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*/
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template<class TYPE> inline void
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ObjectRef::Validate(TYPE* obj)
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{
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n_assert(0 != obj);
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n_assert(obj->IsA(TYPE::RTTI));
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n_assert(0 == this->ref);
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obj->AddRef();
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Interlocked::Exchange((volatile int*)&this->ref, (int)obj);
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}
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//------------------------------------------------------------------------------
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/**
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*/
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inline void
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ObjectRef::Invalidate()
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{
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n_assert(0 != this->ref);
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this->ref->Release();
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Interlocked::Exchange((volatile int*)&this->ref, 0);
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}
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//------------------------------------------------------------------------------
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/**
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*/
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template<class TYPE> inline TYPE*
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ObjectRef::Ref() const
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{
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n_assert(0 != this->ref);
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n_assert(this->ref->IsA(TYPE::RTTI));
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return (TYPE*) this->ref;
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}
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} // namespace Threading
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//------------------------------------------------------------------------------
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