120 lines
4.3 KiB
C
120 lines
4.3 KiB
C
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// STATS.H
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//
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// Headers for STATS.DLL: a library to accumulate high performance
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// statistics and allow them to be tabulated in a different
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// process.
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//
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// Created 24-Oct-96 [JonT]
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#ifndef _STATS_H
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#define _STATS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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//#if defined(_BUILD_STATS_) || defined(__midl)
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#ifdef _BUILD_STATS_
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#define STATSAPI
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#else
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#define STATSAPI __declspec(dllimport)
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#endif
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// Equates
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#define MAX_COUNTER_NAME 64
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#define STATS_COUNTER_ADDDEL_EVENT "StatsNewCounter"
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#define COUNTER_FLAG_NO_STATISTICS 1 // Flag to CreateCounter. No statistics accumulated
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// for this counter even if StartStatistics called.
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// (StartStatistics fails)
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#define COUNTER_FLAG_ACCUMULATE 2 // UpdateCounter adds to the counter value rather
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// than replacing it.
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#define COUNTER_CLEAR 1 // Flag to GetCounter. Specifies the counter should
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// be cleared after being read
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// Types
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#ifdef __midl
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typedef DWORD HCOUNTER;
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#else
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typedef HANDLE HCOUNTER;
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#endif
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typedef struct _FINDCOUNTER
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{
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DWORD dwSize;
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char szName[MAX_COUNTER_NAME]; // Human-readable counter name
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HCOUNTER hcounter; // Handle to use with all stats functions
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int nValue; // Current value of counter
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WORD wFlags; // COUNTER_FLAG_* values
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WORD wRefCount; // Number of times StartStatistics has been called.
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DWORD dwReserved; // Must be preserved: used for FindNextCounter
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} FINDCOUNTER;
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typedef struct _COUNTERSTAT
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{
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DWORD dwSize; // Size of structure. Allows for future growth...
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int nValue;
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int nLow; // Lowest value seen since clear
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int nHigh; // Highest value seen since clear
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int nAverage; // Average value seen since clear
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DWORD dwNumSamples; // Number of samples accumulated
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DWORD dwmsAtClear; // GetTickCount at last Clear/StartStatistics call
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} COUNTERSTAT;
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typedef HCOUNTER HREPORT;
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#define MAX_REPORT_NAME 64
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typedef struct _FINDREPORT
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{
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DWORD dwSize;
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char szName[MAX_REPORT_NAME]; // Human-readable report name
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HREPORT hreport; // Handle to use with all functions
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WORD wFlags; // COUNTER_FLAG_* values
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WORD wRefCount; // Number of times StartStatistics has been called.
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DWORD dwReserved; // Must be preserved: used for FindNextCounter
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} FINDREPORT;
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// Nothing further needed by MIDL
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#ifndef __midl
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// Functions
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// Called by updater of counter to make new counter
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// Sets the event named in the equate STATS_NEW_COUNTER_EVENT
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STATSAPI HCOUNTER WINAPI CreateCounter(char* szName, WORD wFlags);
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// Called by updater of counter when counter is going away
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STATSAPI BOOL WINAPI DeleteCounter(HCOUNTER hc);
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// Used by reader app to locate specific named counters or walk entire list.
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// Pass NULL in for name to walk entire list. Pass NULL to FINDCOUNTER if
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// just an HCOUNTER is desired. FindNext returns FALSE when there are no more.
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STATSAPI HCOUNTER WINAPI FindFirstCounter(char* szName, FINDCOUNTER* pfc);
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STATSAPI BOOL WINAPI FindNextCounter(FINDCOUNTER* pfc);
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// Called by updater of counter. Makes the value current in the counter.
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STATSAPI void WINAPI UpdateCounter(HCOUNTER hcounter, int value);
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// Called by user of counter and just returns value with no statistics
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STATSAPI int WINAPI GetCounter(HCOUNTER hcounter, DWORD dwFlags);
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// Begins collecting statistics on a counter
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STATSAPI BOOL WINAPI StartStatistics(HCOUNTER hcounter);
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// Done collecting statistics on a counter
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STATSAPI void WINAPI StopStatistics(HCOUNTER hcounter);
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// Get statistics on a counter
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STATSAPI BOOL WINAPI ReadStatistics(HCOUNTER hcounter, COUNTERSTAT* pcs);
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// Clear statistics on a counter
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STATSAPI void WINAPI ClearStatistics(HCOUNTER hcounter);
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#endif // #ifndef __midl
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#ifdef __cplusplus
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}
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#endif
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#endif // #ifndef _STATS_H
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