83 lines
1.4 KiB
C++
83 lines
1.4 KiB
C++
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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RefObj.hxx
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Abstract:
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Generic base class for reference counted objects.
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Author:
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Mario Goertzel [MarioGo]
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Revision History:
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MarioGo 12-15-95 Bits in the 'ol bucket
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--*/
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#ifndef __REFERENCED_OBJECTS_HXX
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#define __REFERENCED_OBJECTS_HXX
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class CReferencedObject
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{
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public:
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CReferencedObject()
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: _references(0)
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{
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}
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virtual ~CReferencedObject() { ASSERT(_references == 0); }
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virtual void Reference()
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{
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ASSERT(_references >= 0);
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_references++;
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}
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virtual DWORD Release()
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{
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if ( 0 == Dereference())
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{
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delete this;
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return(0);
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}
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// this pointer maybe invalid here.
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return(1);
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}
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LONG Dereference()
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// Used for objects which override Release().
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{
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ASSERT(_references);
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return(_references--);
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}
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DWORD References()
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{
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// Must be called an exclusive lock held or it is meaningless.
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ASSERT(_references >= 0);
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return(_references);
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}
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BOOL WillBeDeletedIfReleased()
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{
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return _references == 1;
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}
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private:
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CInterlockedInteger _references; // BUGBUG: no real need for interlocking just now
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// since all ops happen under global lock
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};
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#endif // __REFERENCED_OBJECTS_HXX
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