86 lines
3 KiB
C++
86 lines
3 KiB
C++
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Microsoft Windows
|
||
|
|
// Copyright (C) 1992, Microsoft Corporation.
|
||
|
|
//
|
||
|
|
// File: otrack.hxx
|
||
|
|
//
|
||
|
|
// Contents: This file defines facilities for a standard implementation
|
||
|
|
// of reference-counted objects, incorporating mechanisms for
|
||
|
|
// tracking the usage history of the objects.
|
||
|
|
//
|
||
|
|
// Classes: ObjectTracker
|
||
|
|
//
|
||
|
|
// History: 6-Apr-92 MikeSe Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#ifndef __OTRACK_HXX__
|
||
|
|
#define __OTRACK_HXX__
|
||
|
|
|
||
|
|
#include <windows.h>
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Class: ObjectTracker (otr)
|
||
|
|
//
|
||
|
|
// Purpose: Provides basis for tracking (OLE) objects (aka interface handles)
|
||
|
|
//
|
||
|
|
// History: 6-Apr-92 MikeSe Created
|
||
|
|
//
|
||
|
|
// Notes: Access to this class is only indirect, through the macros
|
||
|
|
// defined later.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
class ObjectTracker
|
||
|
|
{
|
||
|
|
protected:
|
||
|
|
ObjectTracker();
|
||
|
|
|
||
|
|
ULONG _cReferences;
|
||
|
|
};
|
||
|
|
|
||
|
|
//+-------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// The following macros encapsulate use of the above
|
||
|
|
//
|
||
|
|
// INHERIT_TRACKING:
|
||
|
|
//
|
||
|
|
// For any class which implements a Cairo interface, add this macro
|
||
|
|
// in the class declaration, eg:
|
||
|
|
//
|
||
|
|
// class CMyFoo: INHERIT_TRACKING, IFoo
|
||
|
|
//
|
||
|
|
// Do not repeat this in any subclass. If both INHERIT_UNWIND and
|
||
|
|
// INHERIT_TRACKING are used, the former should appear first.
|
||
|
|
|
||
|
|
# define INHERIT_TRACKING protected ObjectTracker
|
||
|
|
|
||
|
|
inline ObjectTracker::ObjectTracker():_cReferences(1) {};
|
||
|
|
|
||
|
|
# define DECLARE_STD_REFCOUNTING \
|
||
|
|
STDMETHOD_(ULONG, AddRef) () \
|
||
|
|
{ \
|
||
|
|
InterlockedIncrement((long*)&_cReferences); \
|
||
|
|
return _cReferences; \
|
||
|
|
}; \
|
||
|
|
STDMETHOD_(ULONG, Release) () \
|
||
|
|
{ \
|
||
|
|
if ( InterlockedDecrement((long*)&_cReferences) == 0 ) \
|
||
|
|
{ \
|
||
|
|
delete this; \
|
||
|
|
return 0; \
|
||
|
|
} \
|
||
|
|
else \
|
||
|
|
return _cReferences; \
|
||
|
|
};
|
||
|
|
|
||
|
|
# define ENLIST_TRACKING(cls)
|
||
|
|
|
||
|
|
# define DUMP_TRACKING_INFO()
|
||
|
|
|
||
|
|
# define TRACK_CLASS(fTrack, cls)
|
||
|
|
|
||
|
|
#endif // of ifndef __OTRACK_HXX__
|