dom/webscheduling/TaskSignal.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:expandtab:shiftwidth=2:tabstop=2:
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #ifndef mozilla_dom_TaskSignal_h
   9 #define mozilla_dom_TaskSignal_h
  10
  11 #include "mozilla/DOMEventTargetHelper.h"
  12 #include "mozilla/dom/AbortSignal.h"
  13 #include "mozilla/dom/WebTaskSchedulingBinding.h"
  14 #include "WebTaskScheduler.h"
  15
  16 namespace mozilla::dom {
  17 class TaskSignal : public AbortSignal {
  18  public:
  19   TaskSignal(nsIGlobalObject* aGlobal, TaskPriority aPriority)
  20       : AbortSignal(aGlobal, false, JS::UndefinedHandleValue),
  21         mPriority(aPriority),
  22         mPriorityChanging(false) {}
  23
  24   IMPL_EVENT_HANDLER(prioritychange);
  25
  26   TaskPriority Priority() const { return mPriority; }
  27
  28   JSObject* WrapObject(JSContext* aCx,
  29                        JS::Handle<JSObject*> aGivenProto) override {
  30     return TaskSignal_Binding::Wrap(aCx, this, aGivenProto);
  31   }
  32
  33   void SetPriority(TaskPriority aPriority) { mPriority = aPriority; }
  34
  35   bool IsTaskSignal() const override { return true; }
  36
  37   bool PriorityChanging() const { return mPriorityChanging; }
  38
  39   void SetPriorityChanging(bool aPriorityChanging) {
  40     mPriorityChanging = aPriorityChanging;
  41   }
  42
  43   void SetWebTaskScheduler(WebTaskScheduler* aScheduler) {
  44     mSchedulers.AppendElement(aScheduler);
  45   }
  46
  47   void RunPriorityChangeAlgorithms() {
  48     for (const WeakPtr<WebTaskScheduler>& scheduler : mSchedulers) {
  49       scheduler->RunTaskSignalPriorityChange(this);
  50     }
  51   }
  52
  53  private:
  54   TaskPriority mPriority;
  55
  56   bool mPriorityChanging;
  57
  58   nsTArray<WeakPtr<WebTaskScheduler>> mSchedulers;
  59
  60   ~TaskSignal() = default;
  61 };
  62 }  // namespace mozilla::dom
  63 #endif