xpcom/threads/DelayedRunnable.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef XPCOM_THREADS_DELAYEDRUNNABLE_H_
   8 #define XPCOM_THREADS_DELAYEDRUNNABLE_H_
   9
  10 #include "mozilla/TimeStamp.h"
  11 #include "nsCOMPtr.h"
  12 #include "nsIDelayedRunnableObserver.h"
  13 #include "nsIRunnable.h"
  14 #include "nsITimer.h"
  15 #include "nsThreadUtils.h"
  16
  17 namespace mozilla {
  18
  19 class DelayedRunnable : public Runnable, public nsITimerCallback {
  20  public:
  21   DelayedRunnable(already_AddRefed<nsIEventTarget> aTarget,
  22                   already_AddRefed<nsIRunnable> aRunnable, uint32_t aDelay);
  23
  24   NS_DECL_ISUPPORTS_INHERITED
  25   NS_DECL_NSIRUNNABLE
  26   NS_DECL_NSITIMERCALLBACK
  27
  28   nsresult Init();
  29
  30   /**
  31    * Cancels the underlying timer. Called when the target is going away, so the
  32    * runnable can be released safely on the target thread.
  33    */
  34   void CancelTimer();
  35
  36  private:
  37   ~DelayedRunnable() = default;
  38   nsresult DoRun();
  39
  40   const nsCOMPtr<nsIEventTarget> mTarget;
  41   const nsCOMPtr<nsIDelayedRunnableObserver> mObserver;
  42   nsCOMPtr<nsIRunnable> mWrappedRunnable;
  43   nsCOMPtr<nsITimer> mTimer;
  44   const TimeStamp mDelayedFrom;
  45   uint32_t mDelay;
  46 };
  47
  48 }  // namespace mozilla
  49
  50 #endif