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 "nsIRunnable.h"
  13 #include "nsITargetShutdownTask.h"
  14 #include "nsITimer.h"
  15 #include "nsThreadUtils.h"
  16
  17 namespace mozilla {
  18
  19 class DelayedRunnable : public Runnable,
  20                         public nsITimerCallback,
  21                         public nsITargetShutdownTask {
  22  public:
  23   DelayedRunnable(already_AddRefed<nsISerialEventTarget> aTarget,
  24                   already_AddRefed<nsIRunnable> aRunnable, uint32_t aDelay);
  25
  26   NS_DECL_ISUPPORTS_INHERITED
  27   NS_DECL_NSIRUNNABLE
  28   NS_DECL_NSITIMERCALLBACK
  29
  30   nsresult Init();
  31
  32   /**
  33    * Called when the target is going away so the runnable can be released safely
  34    * on the target thread.
  35    */
  36   void TargetShutdown() override;
  37
  38  private:
  39   ~DelayedRunnable() = default;
  40   nsresult DoRun();
  41
  42   const nsCOMPtr<nsISerialEventTarget> mTarget;
  43   const TimeStamp mDelayedFrom;
  44   const uint32_t mDelay;
  45
  46   mozilla::Mutex mMutex{"DelayedRunnable"};
  47   nsCOMPtr<nsIRunnable> mWrappedRunnable;
  48   nsCOMPtr<nsITimer> mTimer;
  49 };
  50
  51 }  // namespace mozilla
  52
  53 #endif