1 files changed, 110 insertions, 0 deletions
diff --git a/dom/workers/WorkerThread.h b/dom/workers/WorkerThread.h
new file mode 100644
index 0000000000..f1287023d5
--- /dev/null
+++ b/dom/workers/WorkerThread.h
@@ -0,0 +1,110 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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_workers_WorkerThread_h__
+#define mozilla_dom_workers_WorkerThread_h__
+
+#include "mozilla/Attributes.h"
+#include "mozilla/CondVar.h"
+#include "mozilla/DebugOnly.h"
+#include "nsISupportsImpl.h"
+#include "mozilla/RefPtr.h"
+#include "nsThread.h"
+
+class nsIRunnable;
+
+namespace mozilla {
+namespace dom {
+namespace workers {
+
+class RuntimeService;
+class WorkerPrivate;
+template <class> class WorkerPrivateParent;
+class WorkerRunnable;
+
+// This class lets us restrict the public methods that can be called on
+// WorkerThread to RuntimeService and WorkerPrivate without letting them gain
+// full access to private methods (as would happen if they were simply friends).
+class WorkerThreadFriendKey
+{
+  friend class RuntimeService;
+  friend class WorkerPrivate;
+  friend class WorkerPrivateParent<WorkerPrivate>;
+
+  WorkerThreadFriendKey();
+  ~WorkerThreadFriendKey();
+};
+
+class WorkerThread final
+  : public nsThread
+{
+  class Observer;
+
+  CondVar mWorkerPrivateCondVar;
+
+  // Protected by nsThread::mLock.
+  WorkerPrivate* mWorkerPrivate;
+
+  // Only touched on the target thread.
+  RefPtr<Observer> mObserver;
+
+  // Protected by nsThread::mLock and waited on with mWorkerPrivateCondVar.
+  uint32_t mOtherThreadsDispatchingViaEventTarget;
+
+#ifdef DEBUG
+  // Protected by nsThread::mLock.
+  bool mAcceptingNonWorkerRunnables;
+#endif
+
+public:
+  static already_AddRefed<WorkerThread>
+  Create(const WorkerThreadFriendKey& aKey);
+
+  void
+  SetWorker(const WorkerThreadFriendKey& aKey, WorkerPrivate* aWorkerPrivate);
+
+  nsresult
+  DispatchPrimaryRunnable(const WorkerThreadFriendKey& aKey,
+                          already_AddRefed<nsIRunnable> aRunnable);
+
+  nsresult
+  DispatchAnyThread(const WorkerThreadFriendKey& aKey,
+           already_AddRefed<WorkerRunnable> aWorkerRunnable);
+
+  uint32_t
+  RecursionDepth(const WorkerThreadFriendKey& aKey) const;
+
+  // Required for MinGW build #1336527 to handle compiler bug:
+  // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79582
+  NS_IMETHOD
+  RegisterIdlePeriod(already_AddRefed<nsIIdlePeriod> aIdlePeriod) override
+  {
+    return nsThread::RegisterIdlePeriod(already_AddRefed<nsIIdlePeriod>(aIdlePeriod.take()));
+  }
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+private:
+  WorkerThread();
+  ~WorkerThread();
+
+  // This should only be called by consumers that have an
+  // nsIEventTarget/nsIThread pointer.
+  NS_IMETHOD
+  Dispatch(already_AddRefed<nsIRunnable> aRunnable, uint32_t aFlags) override;
+
+  NS_IMETHOD
+  DispatchFromScript(nsIRunnable* aRunnable, uint32_t aFlags) override;
+
+  NS_IMETHOD
+  DelayedDispatch(already_AddRefed<nsIRunnable>, uint32_t) override;
+};
+
+} // namespace workers
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_workers_WorkerThread_h__