xpcom/threads/TimerThread.h

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  17  * The Original Code is mozilla.org code.
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  21  * Portions created by the Initial Developer are Copyright (C) 2001
  22  * the Initial Developer. All Rights Reserved.
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  24  * Contributor(s):
  25  *   Stuart Parmenter <pavlov@netscape.com>
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  40
  41 #ifndef TimerThread_h___
  42 #define TimerThread_h___
  43
  44 #include "nsIObserver.h"
  45 #include "nsIRunnable.h"
  46 #include "nsIThread.h"
  47
  48 #include "nsTimerImpl.h"
  49
  50 #include "nsTArray.h"
  51
  52 #include "mozilla/Monitor.h"
  53 #include "mozilla/TimeStamp.h"
  54
  55 class TimerThread : public nsIRunnable,
  56                     public nsIObserver
  57 {
  58 public:
  59   typedef mozilla::Monitor Monitor;
  60   typedef mozilla::TimeStamp TimeStamp;
  61   typedef mozilla::TimeDuration TimeDuration;
  62
  63   TimerThread();
  64   NS_HIDDEN_(nsresult) InitLocks();
  65
  66   NS_DECL_ISUPPORTS
  67   NS_DECL_NSIRUNNABLE
  68   NS_DECL_NSIOBSERVER
  69
  70   NS_HIDDEN_(nsresult) Init();
  71   NS_HIDDEN_(nsresult) Shutdown();
  72
  73   nsresult AddTimer(nsTimerImpl *aTimer);
  74   nsresult TimerDelayChanged(nsTimerImpl *aTimer);
  75   nsresult RemoveTimer(nsTimerImpl *aTimer);
  76
  77 #define FILTER_DURATION         1e3     /* one second */
  78 #define FILTER_FEEDBACK_MAX     100     /* 1/10th of a second */
  79
  80   void UpdateFilter(PRUint32 aDelay, TimeStamp aTimeout,
  81                     TimeStamp aNow);
  82
  83   void DoBeforeSleep();
  84   void DoAfterSleep();
  85
  86 private:
  87   ~TimerThread();
  88
  89   PRInt32 mInitInProgress;
  90   bool    mInitialized;
  91
  92   // These two internal helper methods must be called while mLock is held.
  93   // AddTimerInternal returns the position where the timer was added in the
  94   // list, or -1 if it failed.
  95   PRInt32 AddTimerInternal(nsTimerImpl *aTimer);
  96   bool    RemoveTimerInternal(nsTimerImpl *aTimer);
  97   void    ReleaseTimerInternal(nsTimerImpl *aTimer);
  98
  99   nsCOMPtr<nsIThread> mThread;
 100   Monitor mMonitor;
 101
 102   bool mShutdown;
 103   bool mWaiting;
 104   bool mSleeping;
 105
 106   nsTArray<nsTimerImpl*> mTimers;
 107
 108 #define DELAY_LINE_LENGTH_LOG2  5
 109 #define DELAY_LINE_LENGTH_MASK  PR_BITMASK(DELAY_LINE_LENGTH_LOG2)
 110 #define DELAY_LINE_LENGTH       PR_BIT(DELAY_LINE_LENGTH_LOG2)
 111
 112   PRInt32  mDelayLine[DELAY_LINE_LENGTH]; // milliseconds
 113   PRUint32 mDelayLineCounter;
 114   PRUint32 mMinTimerPeriod;     // milliseconds
 115   TimeDuration mTimeoutAdjustment;
 116 };
 117
 118 #endif /* TimerThread_h___ */