109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
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//+----------------------------------------------------------------------------
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//
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// File: IdleStat.h
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//
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// Module: CMMON32.EXE
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//
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// Synopsis: Definition for the CIdleStatistics class to handle Idle Disconnect
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//
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// Copyright (c) 1996-1998 Microsoft Corporation
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//
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// Author: quintinb Created Header 08/16/99
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//
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//+----------------------------------------------------------------------------
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#ifndef IDLESTAT_H
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#define IDLESTAT_H
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#include "SmplRing.h"
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//+---------------------------------------------------------------------------
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//
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// class CIdleStatistics
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//
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// Description: A class to handle idle disconnect
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// After Start(), call UpdateEveryInterval(dwTraffic) for every
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// interval, every second. Then use IsIdle() and IsIdleTimeout()
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// to tell whether it is currently idle and whether the idle
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// timeout is reached.
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// Note, this class will only handle one direction traffic
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// (read or write)
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//
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// History: fengsun Created 10/1/97
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//
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//----------------------------------------------------------------------------
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class CIdleStatistics
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{
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public:
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CIdleStatistics();
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void Start(DWORD dwThreshold, DWORD dwTimeOut); // start the idle statistics
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void Stop(); // Stop the idle statistics
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BOOL IsStarted() const; // Whether the idle statistics is started
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// return FALSE if Start() is not called
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// or Stop() is called
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void Reset(); // reset idle start time to 0
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BOOL IsIdle() const; // Whether the connection is currently idle
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BOOL IsIdleTimeout() const; // Whether the idle timeout is reached
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void UpdateEveryInterval(DWORD dwTraffic); // This function is called every second
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protected:
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enum {IDLE_INTERVAL = 60L*1000L }; // 1 minute for idle disconnect time period
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enum {IDLE_MONITOR_DATA_POINTS = IDLE_INTERVAL/1000}; // every second
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DWORD m_dwTimeOut; // Timeout time in miniseconds
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DWORD m_dwThreshold; // The threshold, if the traffic in last minute
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// is below threshold, it is considered idle
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DWORD m_dwStartIdleTime; // The start time when the connection is idle,
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// or 0 if not currently idle
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CSimpleRing<DWORD, IDLE_MONITOR_DATA_POINTS> m_DataPointsRing; // A 60 point DWORD data array
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public:
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#ifdef DEBUG
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void AssertValid() const;
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#endif
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};
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//
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// Inline functions
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//
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inline CIdleStatistics::CIdleStatistics()
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{
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m_dwTimeOut = m_dwThreshold = m_dwStartIdleTime = 0;
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}
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inline void CIdleStatistics::Reset()
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{
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m_dwStartIdleTime = 0;
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m_DataPointsRing.Reset();
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}
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inline void CIdleStatistics::Stop()
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{
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m_dwTimeOut = 0;
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}
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inline BOOL CIdleStatistics::IsStarted() const
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{
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return m_dwTimeOut != 0;
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}
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inline BOOL CIdleStatistics::IsIdle() const
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{
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return IsStarted() && (m_dwStartIdleTime != 0);
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}
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inline BOOL CIdleStatistics::IsIdleTimeout() const
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{
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return IsIdle() &&
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( (GetTickCount() - m_dwStartIdleTime) > m_dwTimeOut);
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}
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#endif
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