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83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
//====================================
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// File: OBJLIST.CPP
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// Author: Matt Pietrek
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// From: Microsoft Systems Journal
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// "Under the Hood", April 1996
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//====================================
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#include <winperf.h>
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#include <stdlib.h>
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#pragma hdrstop
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#include "titledb.h"
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#include "objlist.h"
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#include "perfobj.h"
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#include "makeptr.h"
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CPerfObjectList::CPerfObjectList(
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CPerfSnapshot * const pPerfSnapshot,
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CPerfTitleDatabase * const pPerfTitleDatabase )
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{
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m_pPerfSnapshot = pPerfSnapshot;
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m_pPerfCounterTitles = pPerfTitleDatabase;
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}
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CPerfObject *
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CPerfObjectList::GetFirstPerfObject( void )
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{
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m_currentObjectListIndex = 0;
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if ( m_currentObjectListIndex >= m_pPerfSnapshot->GetNumObjectTypes() )
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return 0;
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m_pCurrObjectType =
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(PPERF_OBJECT_TYPE)m_pPerfSnapshot->GetPostHeaderPointer();
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return new CPerfObject( m_pCurrObjectType, m_pPerfCounterTitles );
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}
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CPerfObject *
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CPerfObjectList::GetNextPerfObject( void )
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{
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// Are we at the last object in the list? Return nullptr if so.
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if ( ++m_currentObjectListIndex >= m_pPerfSnapshot->GetNumObjectTypes() )
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return 0;
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// Advance to the next PERF_OBJECT_TYPE structure
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m_pCurrObjectType = MakePtr(PPERF_OBJECT_TYPE,
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m_pCurrObjectType,
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m_pCurrObjectType->TotalByteLength );
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return new CPerfObject( m_pCurrObjectType, m_pPerfCounterTitles );
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}
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CPerfObject *
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CPerfObjectList::GetPerfObject( PCTSTR const pszObjListName )
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{
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DWORD objListIdx
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= m_pPerfCounterTitles->GetIndexFromTitleString( pszObjListName );
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if ( 0 == objListIdx )
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return 0;
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// Point at first PERF_OBJECT_TYPE, and loop through the list, looking
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// for one that matches.
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PPERF_OBJECT_TYPE pCurrObjectType =
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(PPERF_OBJECT_TYPE)m_pPerfSnapshot->GetPostHeaderPointer();
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for ( unsigned i=0; i < m_pPerfSnapshot->GetNumObjectTypes(); i++ )
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{
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// Is this the one that matches?
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if ( pCurrObjectType->ObjectNameTitleIndex == objListIdx )
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return new CPerfObject(pCurrObjectType, m_pPerfCounterTitles);
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// Nope... try the next object type
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pCurrObjectType = MakePtr( PPERF_OBJECT_TYPE,
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pCurrObjectType,
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pCurrObjectType->TotalByteLength );
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}
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return 0;
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} |