135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1999.
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//
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// File : PERFOBJ.HXX
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//
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// Contents : Performance Data Object
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//
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// Classes : CPerfMon
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//
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// History: 22-Mar-94 t-joshh Created
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// 14-Jan-98 dlee Cleanup
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include <bitfield.hxx>
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#include <smem.hxx>
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#include <perfci.hxx>
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#include <secutil.hxx>
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//----------------------------------------------------------------------------
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//
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// Performance Data's format in Shared Memory
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//
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// --------------------------------------------------------------------------------
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// | | | | | | | ... | | | ....
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// | | | | | | | | | |
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// --------------------------------------------------------------------------------
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// \ /\ /\ /\ /\ /\ / \ /\ /
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// (int) (BYTES)(2INT) (int) 31*(WCHAR) (DWORD) (DWORD) (int) <-- Size
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// No. of Empty Seq.No No. of Name of Counter ...... Counter No. of
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// Instance Slot Reservd CPerfMon CPerfMon CPerfMon
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// Object Object Object
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// Attached Attached
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// \_________ One CPerfMon Object____________/\___ Another one
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//
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//
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//
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//----------------------------------------------------------------------------
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#if (CIDBG==1)
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DECLARE_DEBUG(Perf);
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#define PerfDebugOut( x ) PerfInlineDebugOut x
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#else // CIDBG == 0
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#define PerfDebugOut( x )
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#endif // CIDBG == 1
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class CNamedMutex;
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//+---------------------------------------------------------------------------
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//
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// Class: CPerfMon
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//
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// Purpose: Performance Object
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//
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// History: 22-Mar-94 t-joshh Created
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//
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//----------------------------------------------------------------------------
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class CPerfMon
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{
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public:
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CPerfMon( const WCHAR * wszInstanceName );
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~CPerfMon();
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DWORD GetCurrValue( ULONG iCounter )
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{
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return * ComputeAddress( iCounter );
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}
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void Update( ULONG iCounter, DWORD dwValue )
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{
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DWORD * pdw = ComputeAddress( iCounter );
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InterlockedExchange( (long *) pdw, dwValue );
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}
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void Increment( ULONG iCounter )
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{
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DWORD * pdw = ComputeAddress( iCounter );
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InterlockedIncrement( (long *) pdw );
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}
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void Decrement( ULONG iCounter )
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{
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DWORD * pdw = ComputeAddress( iCounter );
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InterlockedDecrement( (long *) pdw );
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}
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private:
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DWORD * ComputeAddress( ULONG iCounter )
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{
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Win4Assert( 0 != _pdwSharedMemory );
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iCounter /= 2;
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Win4Assert( iCounter > 0 && iCounter <= _cCounters );
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iCounter--;
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return _pdwSharedMemory + iCounter;
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}
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DWORD * _pdwSharedMemory;
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ULONG _cCounters;
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int * _pcCount;
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BYTE * _pbBitfield;
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UINT * _pSeqNo;
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int _iWhichSlot;
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int * _piNumberAttach;
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CNamedSharedMem _SharedMemObj;
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XPtr<CNamedMutex> _xPerfMutex;
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};
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void ComputeCIPerfmonVars( ULONG & cMaxCats, ULONG & cbCatBitfield,
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ULONG & cbPerfHeader, ULONG & cbSharedMem );
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const unsigned cbTotalCounters = ( FILTER_TOTAL_NUM_COUNTERS +
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CI_TOTAL_NUM_COUNTERS ) * sizeof DWORD;
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const ULONG cbPerfCatalogSlot = sizeof( int ) +
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( CI_PERF_MAX_CATALOG_LEN * sizeof WCHAR ) +
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cbTotalCounters;
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