gecko-dev/xpcom/threads/TimerThread.h

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2.5 KiB
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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 "nsThreadUtils.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);
void DoBeforeSleep();
void DoAfterSleep();
bool IsOnTimerThread() const
{
return mThread == NS_GetCurrentThread();
}
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;
};
struct TimerAdditionComparator {
TimerAdditionComparator(const mozilla::TimeStamp &aNow,
nsTimerImpl *aTimerToInsert) :
now(aNow)
#ifdef DEBUG
, timerToInsert(aTimerToInsert)
#endif
{}
PRBool LessThan(nsTimerImpl *fromArray, nsTimerImpl *newTimer) const {
NS_ABORT_IF_FALSE(newTimer == timerToInsert, "Unexpected timer ordering");
// Skip any overdue timers.
return fromArray->mTimeout <= now ||
fromArray->mTimeout <= newTimer->mTimeout;
}
PRBool Equals(nsTimerImpl* fromArray, nsTimerImpl* newTimer) const {
return PR_FALSE;
}
private:
const mozilla::TimeStamp &now;
#ifdef DEBUG
const nsTimerImpl * const timerToInsert;
#endif
};
#endif /* TimerThread_h___ */