1 files changed, 63 insertions, 0 deletions
diff --git a/dom/webscheduling/TaskSignal.h b/dom/webscheduling/TaskSignal.h
new file mode 100644
index 0000000000..2cc02cc2fc
--- /dev/null
+++ b/dom/webscheduling/TaskSignal.h
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 mozilla_dom_TaskSignal_h
+#define mozilla_dom_TaskSignal_h
+
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/dom/AbortSignal.h"
+#include "mozilla/dom/WebTaskSchedulingBinding.h"
+#include "WebTaskScheduler.h"
+
+namespace mozilla::dom {
+class TaskSignal : public AbortSignal {
+ public:
+  TaskSignal(nsIGlobalObject* aGlobal, TaskPriority aPriority)
+      : AbortSignal(aGlobal, false, JS::UndefinedHandleValue),
+        mPriority(aPriority),
+        mPriorityChanging(false) {}
+
+  IMPL_EVENT_HANDLER(prioritychange);
+
+  TaskPriority Priority() const { return mPriority; }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override {
+    return TaskSignal_Binding::Wrap(aCx, this, aGivenProto);
+  }
+
+  void SetPriority(TaskPriority aPriority) { mPriority = aPriority; }
+
+  bool IsTaskSignal() const override { return true; }
+
+  bool PriorityChanging() const { return mPriorityChanging; }
+
+  void SetPriorityChanging(bool aPriorityChanging) {
+    mPriorityChanging = aPriorityChanging;
+  }
+
+  void SetWebTaskScheduler(WebTaskScheduler* aScheduler) {
+    mSchedulers.AppendElement(aScheduler);
+  }
+
+  void RunPriorityChangeAlgorithms() {
+    for (const WeakPtr<WebTaskScheduler>& scheduler : mSchedulers) {
+      scheduler->RunTaskSignalPriorityChange(this);
+    }
+  }
+
+ private:
+  TaskPriority mPriority;
+
+  bool mPriorityChanging;
+
+  nsTArray<WeakPtr<WebTaskScheduler>> mSchedulers;
+
+  ~TaskSignal() = default;
+};
+}  // namespace mozilla::dom
+#endif