124 lines
2.5 KiB
C
124 lines
2.5 KiB
C
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/******************************************************************************
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O B J E C T D A T A
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Name: objdata.c
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Description:
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This module contains functions that access objects in performance
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data.
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Functions:
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FirstObject
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NextObject
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FindObject
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FindObjectN
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******************************************************************************/
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#include <windows.h>
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#include <winperf.h>
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#include "perfdata.h"
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//*********************************************************************
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//
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// FirstObject
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//
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// Returns pointer to the first object in pData.
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// If pData is NULL then NULL is returned.
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//
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PPERF_OBJECT FirstObject (PPERF_DATA pData)
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{
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if (pData)
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return ((PPERF_OBJECT) ((PBYTE) pData + pData->HeaderLength));
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else
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return NULL;
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}
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//*********************************************************************
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//
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// NextObject
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//
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// Returns pointer to the next object following pObject.
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//
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// If pObject is the last object, bogus data maybe returned.
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// The caller should do the checking.
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//
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// If pObject is NULL, then NULL is returned.
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//
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PPERF_OBJECT NextObject (PPERF_OBJECT pObject)
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{
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if (pObject)
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return ((PPERF_OBJECT) ((PBYTE) pObject + pObject->TotalByteLength));
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else
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return NULL;
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}
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//*********************************************************************
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//
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// FindObject
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//
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// Returns pointer to object with TitleIndex. If not found, NULL
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// is returned.
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//
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PPERF_OBJECT FindObject (PPERF_DATA pData, DWORD TitleIndex)
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{
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PPERF_OBJECT pObject;
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DWORD i = 0;
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if (pObject = FirstObject (pData))
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while (i < pData->NumObjectTypes)
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{
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if (pObject->ObjectNameTitleIndex == TitleIndex)
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return pObject;
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pObject = NextObject (pObject);
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i++;
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}
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return NULL;
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}
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//*********************************************************************
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//
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// FindObjectN
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//
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// Find the Nth object in pData. If not found, NULL is returned.
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// 0 <= N < NumObjectTypes.
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//
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PPERF_OBJECT FindObjectN (PPERF_DATA pData, DWORD N)
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{
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PPERF_OBJECT pObject;
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DWORD i = 0;
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if (!pData)
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return NULL;
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else if (N >= pData->NumObjectTypes)
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return NULL;
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else
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{
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pObject = FirstObject (pData);
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while (i != N)
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{
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pObject = NextObject (pObject);
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i++;
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}
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return pObject;
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}
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}
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