98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
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/*++
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Copyright (C) 1998-1999 Microsoft Corporation
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Module Name:
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classmap.h
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Abstract:
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the perfobject ID is combination of the perf counter ID and
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the perf counter type. This is necessary to support counter
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definitions that use the counter ID for the numerator and denominator
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values (e.g. a counter and it's base value.)
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--*/
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//***************************************************************************
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//
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// class CClassMapInfo
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//
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//***************************************************************************
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#ifndef _CLASSMAP_H_
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#define _CLASSMAP_H_
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#include "utils.h"
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typedef __int64 PerfObjectId;
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#define CM_MAKE_PerfObjectId(ctr,type) (PerfObjectId)(((__int64)(ctr)) | (((__int64)type << 32) & 0xFFFFFFFF00000000))
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class CClassMapInfo
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{
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private:
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// friend clss declarations
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friend class CNt5PerfProvider;
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friend class CNt5Refresher;
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friend class PerfHelper;
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friend class CPerfObjectAccess;
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// cached class definition object from CIMOM
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IWbemClassObject *m_pClassDef;
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LPWSTR m_pszClassName; // name of this class
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BOOL m_bSingleton; // true if this class has 1 and only 1 instance
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BOOL m_bCostly; // true when the costly qualifier is present in the obj def
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DWORD m_dwObjectId; // perf object ID corresponding to this class
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LONG m_lRefCount; // count of objects that are using this instance
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// saved handles to properties that are in every class of a
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// performance class object
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LONG m_dwNameHandle;
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LONG m_dwPerfTimeStampHandle;
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LONG m_dw100NsTimeStampHandle;
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LONG m_dwObjectTimeStampHandle;
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LONG m_dwPerfFrequencyHandle;
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LONG m_dw100NsFrequencyHandle;
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LONG m_dwObjectFrequencyHandle;
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// These entries make up the table of saved handles to the properties
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// belonging to this class.
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DWORD m_dwNumProps; // number of properties in the class
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PerfObjectId *m_pdwIDs; // array of PerfCounterTitleIndex values
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DWORD *m_pdwHandles; // array of handles to each of the properties
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DWORD *m_pdwTypes; // array of perf counter type values
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// internal sort function to arrange handles in order of the
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// perf counter ID so as to facilitate a binary table search
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//
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// NOTE: Consider a better search routine base on table size
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void SortHandles();
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public:
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CClassMapInfo();
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~CClassMapInfo();
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// loads a new object and caches the necessary information
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BOOL Map( IWbemClassObject *pObj );
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// creates a new copy from an existing Class Map
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CClassMapInfo *CreateDuplicate();
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LONG AddRef() {return ++m_lRefCount;} // increment reference counter
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LONG Release() {return --m_lRefCount;} // decrement reference counter
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// looks up the ID in the table and returns the corresponding
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// handle to the property
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LONG GetPropHandle(PerfObjectId dwId);
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// returns information about the class
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DWORD GetObjectId() { return m_dwObjectId; }
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BOOL IsSingleton() { return m_bSingleton; }
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BOOL IsCostly() { return m_bCostly; }
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};
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#endif // _CLASSMAP_H_
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