gecko-dev/xpcom/threads/TimerThread.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef TimerThread_h___
#define TimerThread_h___
#include "nsIObserver.h"
#include "nsIRunnable.h"
#include "nsIThread.h"
#include "nsTimerImpl.h"
#include "nsTArray.h"
#include "mozilla/Attributes.h"
#include "mozilla/Monitor.h"
#include "mozilla/TimeStamp.h"
class TimerThread MOZ_FINAL : public nsIRunnable,
public nsIObserver
{
public:
typedef mozilla::Monitor Monitor;
typedef mozilla::TimeStamp TimeStamp;
typedef mozilla::TimeDuration TimeDuration;
TimerThread();
NS_HIDDEN_(nsresult) InitLocks();
NS_DECL_ISUPPORTS
NS_DECL_NSIRUNNABLE
NS_DECL_NSIOBSERVER
NS_HIDDEN_(nsresult) Init();
NS_HIDDEN_(nsresult) Shutdown();
nsresult AddTimer(nsTimerImpl *aTimer);
nsresult TimerDelayChanged(nsTimerImpl *aTimer);
nsresult RemoveTimer(nsTimerImpl *aTimer);
#define FILTER_DURATION 1e3 /* one second */
#define FILTER_FEEDBACK_MAX 100 /* 1/10th of a second */
void UpdateFilter(uint32_t aDelay, TimeStamp aTimeout,
TimeStamp aNow);
void DoBeforeSleep();
void DoAfterSleep();
private:
~TimerThread();
int32_t mInitInProgress;
bool mInitialized;
// These two internal helper methods must be called while mLock is held.
// AddTimerInternal returns the position where the timer was added in the
// list, or -1 if it failed.
int32_t AddTimerInternal(nsTimerImpl *aTimer);
bool RemoveTimerInternal(nsTimerImpl *aTimer);
void ReleaseTimerInternal(nsTimerImpl *aTimer);
nsCOMPtr<nsIThread> mThread;
Monitor mMonitor;
bool mShutdown;
bool mWaiting;
bool mSleeping;
nsTArray<nsTimerImpl*> mTimers;
#define DELAY_LINE_LENGTH_LOG2 5
#define DELAY_LINE_LENGTH_MASK PR_BITMASK(DELAY_LINE_LENGTH_LOG2)
#define DELAY_LINE_LENGTH PR_BIT(DELAY_LINE_LENGTH_LOG2)
int32_t mDelayLine[DELAY_LINE_LENGTH]; // milliseconds
uint32_t mDelayLineCounter;
uint32_t mMinTimerPeriod; // milliseconds
TimeDuration mTimeoutAdjustment;
};
#endif /* TimerThread_h___ */