gecko/xpcom/threads/TimerThread.h

114 lines
2.5 KiB
C++

/* -*- 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/Atomics.h"
#include "mozilla/Attributes.h"
#include "mozilla/Monitor.h"
namespace mozilla {
class TimeStamp;
}
class TimerThread MOZ_FINAL
: public nsIRunnable
, public nsIObserver
{
public:
typedef mozilla::Monitor Monitor;
typedef mozilla::TimeStamp TimeStamp;
typedef mozilla::TimeDuration TimeDuration;
TimerThread();
nsresult InitLocks();
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIRUNNABLE
NS_DECL_NSIOBSERVER
nsresult Init();
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();
mozilla::Atomic<bool> 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 mNotified;
bool mSleeping;
nsTArray<nsTimerImpl*> mTimers;
};
struct TimerAdditionComparator
{
TimerAdditionComparator(const mozilla::TimeStamp& aNow,
nsTimerImpl* aTimerToInsert) :
now(aNow)
#ifdef DEBUG
, timerToInsert(aTimerToInsert)
#endif
{
}
bool LessThan(nsTimerImpl* aFromArray, nsTimerImpl* aNewTimer) const
{
NS_ABORT_IF_FALSE(aNewTimer == timerToInsert, "Unexpected timer ordering");
// Skip any overdue timers.
return aFromArray->mTimeout <= now ||
aFromArray->mTimeout <= aNewTimer->mTimeout;
}
bool Equals(nsTimerImpl* aFromArray, nsTimerImpl* aNewTimer) const
{
return false;
}
private:
const mozilla::TimeStamp& now;
#ifdef DEBUG
const nsTimerImpl* const timerToInsert;
#endif
};
#endif /* TimerThread_h___ */