89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
/**********************************************************************
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Filename : GRefCount.cpp
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Content : Reference counting implementation
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Created : January 14, 1999
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Authors : Michael Antonov
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Notes :
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History :
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Copyright : (c) 1999-2006 Scaleform Corp. All Rights Reserved.
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Licensees may use this file in accordance with the valid Scaleform
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Commercial License Agreement provided with the software.
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This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
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THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR ANY PURPOSE.
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**********************************************************************/
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#include "GRefCount.h"
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#include "GArray.h"
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#include "GHeapNew.h"
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#include "GAtomic.h"
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// ***** Reference Count Base implementation
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GRefCountImplCore::~GRefCountImplCore()
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{
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// RefCount can be either 1 or 0 here.
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// 0 if Release() was properly called.
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// 1 if the object was declared on stack or as an aggregate.
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GASSERT(RefCount <= 1);
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}
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#ifdef GFC_BUILD_DEBUG
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void GRefCountImplCore::reportInvalidDelete(void *pmem)
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{
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GFC_DEBUG_ERROR1(1,
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"Invalid delete call on ref-counted object at %p. Please use Release()", pmem);
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GASSERT(0);
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}
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#endif
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// *** Thread-Safe GRefCountImpl
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void GRefCountImpl::AddRef()
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{
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GAtomicOps<SInt>::ExchangeAdd_NoSync(&RefCount, 1);
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}
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void GRefCountImpl::Release()
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{
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if ((GAtomicOps<SInt>::ExchangeAdd_NoSync(&RefCount, -1) - 1) == 0)
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delete this;
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}
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// *** NON-Thread-Safe GRefCountImpl
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void GRefCountNTSImpl::Release()
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{
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RefCount--;
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if (RefCount == 0)
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delete this;
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}
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// *** WeakProxy support GRefCountImpl
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GRefCountWeakSupportImpl::~GRefCountWeakSupportImpl()
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{
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if (pWeakProxy)
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{
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pWeakProxy->NotifyObjectDied();
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pWeakProxy->Release();
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}
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}
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// Create/return create proxy, users must release proxy when no longer needed
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GWeakPtrProxy* GRefCountWeakSupportImpl::CreateWeakProxy() const
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{
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if (!pWeakProxy)
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if ((pWeakProxy = GHEAP_AUTO_NEW(this)
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GWeakPtrProxy(const_cast<GRefCountWeakSupportImpl*>(this)))==0)
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return 0;
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pWeakProxy->AddRef();
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return pWeakProxy;
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}
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