1 files changed, 69 insertions, 0 deletions
diff --git a/dom/ipc/InProcessChild.h b/dom/ipc/InProcessChild.h
new file mode 100644
index 0000000000..16176ef98b
--- /dev/null
+++ b/dom/ipc/InProcessChild.h
@@ -0,0 +1,69 @@
+/* -*- 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_InProcessChild_h
+#define mozilla_dom_InProcessChild_h
+
+#include "mozilla/dom/PInProcessChild.h"
+#include "mozilla/dom/JSProcessActorChild.h"
+#include "mozilla/dom/ProcessActor.h"
+#include "mozilla/dom/RemoteType.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIDOMProcessChild.h"
+
+namespace mozilla::dom {
+class PWindowGlobalParent;
+class PWindowGlobalChild;
+class InProcessParent;
+
+/**
+ * The `InProcessChild` class represents the child half of a main-thread to
+ * main-thread actor.
+ *
+ * The `PInProcess` actor should be used as an alternate manager to `PContent`
+ * for async actors which want to communicate uniformly between Content->Chrome
+ * and Chrome->Chrome situations.
+ */
+class InProcessChild final : public nsIDOMProcessChild,
+                             public PInProcessChild,
+                             public ProcessActor {
+ public:
+  friend class InProcessParent;
+  friend class PInProcessChild;
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIDOMPROCESSCHILD
+
+  // Get the singleton instance of this actor.
+  static InProcessChild* Singleton();
+
+  // Get the parent side of the in-process child actor |aActor|. If |aActor| is
+  // not an in-process actor, or is not connected, this method will return
+  // |nullptr|.
+  static IProtocol* ParentActorFor(IProtocol* aActor);
+
+  const nsACString& GetRemoteType() const override { return NOT_REMOTE_TYPE; }
+
+ protected:
+  already_AddRefed<JSActor> InitJSActor(JS::Handle<JSObject*> aMaybeActor,
+                                        const nsACString& aName,
+                                        ErrorResult& aRv) override;
+  mozilla::ipc::IProtocol* AsNativeActor() override { return this; }
+
+ private:
+  // NOTE: PInProcess lifecycle management is declared as staic methods and
+  // state on InProcessParent, and implemented in InProcessImpl.cpp.
+  virtual void ActorDestroy(ActorDestroyReason aWhy) override;
+  ~InProcessChild() = default;
+
+  static StaticRefPtr<InProcessChild> sSingleton;
+
+  nsRefPtrHashtable<nsCStringHashKey, JSProcessActorChild> mProcessActors;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // defined(mozilla_dom_InProcessChild_h)