107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
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//+----------------------------------------------------------------------------
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//
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// File: IdleStat.cpp
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//
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// Module: CMMON32.EXE
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//
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// Synopsis: Implementation of class CIdleStatistics
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//
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// Copyright (c) 1998-1999 Microsoft Corporation
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//
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// Author: Fengsun Created 10/01/97
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//
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//+----------------------------------------------------------------------------
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#include "cmmaster.h"
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#include "IdleStat.h"
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//+---------------------------------------------------------------------------
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//
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// CIdleStatistics::Start()
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//
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// Synopsis: Start the idle statistics
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//
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// Arguments: dwThreshold: The idle threshold. Traffic in a minute Less than
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// the threshold is considered idle
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// dwTimeOut: Idle time out in minisecond
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//
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// History: fengsun created on 10/1/97
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//
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//----------------------------------------------------------------------------
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void CIdleStatistics::Start(DWORD dwThreshold, DWORD dwTimeOut)
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{
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MYDBGASSERT(dwTimeOut != 0);
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m_dwThreshold = dwThreshold;
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m_dwTimeOut = dwTimeOut;
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m_dwStartIdleTime = 0;
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m_DataPointsRing.Reset();
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}
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//+---------------------------------------------------------------------------
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//
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// CIdleStatistics::UpdateEveryInterval()
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//
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// Synopsis: This function should be call every Interval with a updated statistic
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//
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// Arguments: dwTraffic: the updated statistics
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//
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//
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// History: fengsun created on 10/1/97
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//
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//----------------------------------------------------------------------------
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void CIdleStatistics::UpdateEveryInterval(DWORD dwTraffic)
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{
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DWORD dwLast = m_DataPointsRing.GetOldest();
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m_DataPointsRing.Add(dwTraffic);
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if (dwLast == 0) // Started less than a minute
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{
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return;
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}
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if (dwTraffic - dwLast > m_dwThreshold)
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{
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//
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// Not idle
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//
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m_dwStartIdleTime = 0;
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}
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else
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{
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if (m_dwStartIdleTime == 0)
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{
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//
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// We are already idle for 1 minute
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//
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m_dwStartIdleTime = GetTickCount() - IDLE_INTERVAL;
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}
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}
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}
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#ifdef DEBUG
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//+----------------------------------------------------------------------------
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//
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// Function: CIdleStatistics::AssertValid
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//
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// Synopsis: For debug purpose only, assert the object is valid
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//
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// Arguments: None
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//
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// Returns: Nothing
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//
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// History: Created Header 2/12/98
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//
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//+----------------------------------------------------------------------------
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void CIdleStatistics::AssertValid() const
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{
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MYDBGASSERT(m_dwTimeOut <10000*60*1000); // less than 10000 minutes
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MYDBGASSERT(m_dwThreshold <= 64*1024);
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ASSERT_VALID(&m_DataPointsRing);
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}
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#endif
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