78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
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/*++
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Copyright (C) 1995-1999 Microsoft Corporation
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Module Name:
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pdhicalc.h
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Abstract:
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calculation functions for the Data Provider Helper.
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--*/
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#ifndef _PDHICALC_H_
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#define _PDHICALC_H_
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#include <pdh.h> // for public PDH data types
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#include <winperf.h> // for perf counter type constants
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#if defined(__cplusplus)
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#define LINK_SPEC extern "C"
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#else
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#define LINK_SPEC
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#endif
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// special perf counter type used by text log files
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// value is stored as a double precision floating point value
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#define PERF_DOUBLE_RAW (PERF_SIZE_DWORD | 0x00002000 | PERF_TYPE_NUMBER | \
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PERF_NUMBER_DECIMAL)
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typedef double (APIENTRY COUNTERCALC) (PPDH_RAW_COUNTER, PPDH_RAW_COUNTER, LONGLONG*, LPDWORD);
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typedef double (APIENTRY *LPCOUNTERCALC) (PPDH_RAW_COUNTER, PPDH_RAW_COUNTER, LONGLONG*, LPDWORD);
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typedef PDH_STATUS (APIENTRY COUNTERSTAT) (LPVOID, DWORD, DWORD, DWORD, PPDH_RAW_COUNTER, PPDH_STATISTICS);
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typedef PDH_STATUS (APIENTRY *LPCOUNTERSTAT) (LPVOID, DWORD, DWORD, DWORD, PPDH_RAW_COUNTER, PPDH_STATISTICS);
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// calc functions
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extern COUNTERCALC PdhiCalcDouble;
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extern COUNTERCALC PdhiCalcAverage;
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extern COUNTERCALC PdhiCalcElapsedTime;
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extern COUNTERCALC PdhiCalcRawFraction;
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extern COUNTERCALC PdhiCalcCounter;
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extern COUNTERCALC PdhiCalcTimer;
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extern COUNTERCALC PdhiCalcInverseTimer;
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extern COUNTERCALC PdhiCalcRawCounter;
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extern COUNTERCALC PdhiCalcNoData;
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extern COUNTERCALC PdhiCalcDelta;
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// status functions
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extern COUNTERSTAT PdhiComputeFirstLastStats;
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extern COUNTERSTAT PdhiComputeRawCountStats;
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extern COUNTERSTAT PdhiComputeNoDataStats;
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LINK_SPEC
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PDH_STATUS
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PdhiComputeFormattedValue (
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IN LPCOUNTERCALC pCalcFunc,
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IN DWORD dwCounterType,
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IN LONG lScale,
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IN DWORD dwFormat,
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IN PPDH_RAW_COUNTER pRawValue1,
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IN PPDH_RAW_COUNTER pRawValue2,
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IN PLONGLONG pTimeBase,
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IN DWORD dwReserved,
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IN OUT PPDH_FMT_COUNTERVALUE fmtValue
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);
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LINK_SPEC
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BOOL
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AssignCalcFunction (
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IN DWORD dwCounterType,
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IN LPCOUNTERCALC *pCalcFunc,
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IN LPCOUNTERSTAT *pStatFunc
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);
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#endif // _PDHICALC_H_
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