Leaked source code of windows server 2003
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/*==========================================================================*\
Module: perf.h
Copyright Microsoft Corporation 1998, All Rights Reserved.
Author: WayneC, MinYang
Descriptions: Interface functions accessing perf object instances.
Modified: Awetmore - for NTFSDRV usage \*==========================================================================*/
#ifndef __PERF_H__
#define __PERF_H__
#include "snprflib.h"
#include "ntfsdrct.h"
#define DEFAULT_PERF_UPDATE_INTERVAL 1000 // milliseconds
#define IncCtr(ppoi,x) { LPDWORD pDword; if (ppoi) { pDword = ppoi->GetDwordCounter(x); if (pDword) InterlockedIncrement((PLONG)pDword); }}
#define DecCtr(ppoi,x) { LPDWORD pDword; if (ppoi) { pDword = ppoi->GetDwordCounter(x); if (pDword) InterlockedDecrement((PLONG)pDword); }}
#define AddCtr(ppoi,x,y) { LPDWORD pDword; if (ppoi) { pDword = ppoi->GetDwordCounter(x); if (pDword) InterlockedExchangeAdd((PLONG)pDword, (LONG)y); }}
#define SetCtr(ppoi,x,y) { LPDWORD pDword; if (ppoi) { pDword = ppoi->GetDwordCounter(x); if (pDword) (*pDword)=y; } }
BOOL InitializePerformanceStatistics ();void ShutdownPerformanceStatistics ();
PerfObjectInstance * CreatePerfObjInstance (LPCWSTR pwstrInstanceName);
extern BOOL g_fPerfCounters;
#endif // __PERF_H__
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