cPerfMon.h

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//
//
 
#ifndef _INC_cPerfMon_H
#define _INC_cPerfMon_H
#ifndef NO_PRAGMA_ONCE
#pragma once
#endif
 
#if defined(_WIN32) && defined(_MSC_VER) && ! defined(UNDER_CE)
#include "../GrayLibBase.h"
#include "GrayCore/include/cUnitTestDecl.h"
#include "GrayCore/include/cOSHandle.h"
#include "GrayCore/include/FileName.h"
#include <Pdh.h>        // HQUERY
//#include <winperf.h>
 
#define USE_PERFMON
 
namespace GrayLib
{
        UNITTEST2_PREDEF(cPerfMon);
 
        class GRAYLIB_LINK cPerfMonCounter
        {
        public:
                PDH_HCOUNTER m_hCounter;
        public:
                cPerfMonCounter() noexcept
                : m_hCounter(HANDLE_NULL)
                {
                }
                // Assume QueryPerfData has been called.
                HRESULT GetCounterValue(OUT PDH_FMT_COUNTERVALUE& FmtValue, DWORD dwFormat) const;
                HRESULT RemovePerfCounter();
        };
 
        class GRAYLIB_LINK cPerfMonQuery
        {
 
        public:
                static const FILECHAR_t* k_szModule; // _FN("pdh.dll")
                static const FILECHAR_t* k_szProcessorTime;
                PDH_HQUERY m_hQuery;
        public:
                cPerfMonQuery() noexcept;
                ~cPerfMonQuery();
 
                HRESULT OpenPerf(const FILECHAR_t* pszDataSource = nullptr, DWORD_PTR dwUserData = 0);
                HRESULT ClosePerf();
 
                HRESULT AddPerfCounter( OUT cPerfMonCounter& Counter, const FILECHAR_t* pszDataSource, DWORD_PTR dwUserData = 0);
                HRESULT QueryPerfData();
 
                UNITTEST_FRIEND(cPerfMon);
        };
}
#endif  // _WIN32
#endif  // _INC_cPerfMon_H