Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/ipc/glue/ToplevelActorHolder.h b/ipc/glue/ToplevelActorHolder.h
new file mode 100644
index 0000000000..6e95ef8565
--- /dev/null
+++ b/ipc/glue/ToplevelActorHolder.h
@@ -0,0 +1,45 @@
+/* -*- 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_IPC_TOPLEVELACTORHOLDER_H
+#define MOZILLA_IPC_TOPLEVELACTORHOLDER_H
+
+#include "nsISupports.h"
+
+namespace mozilla::ipc {
+
+// Class to let us close the actor when we're not using it anymore.  You
+// should create a single instance of this, and when you have no more
+// references it will be destroyed and will Close() the underlying
+// top-level channel.
+// When you want to send something, you use something like
+// aActor->Actor()->SendFoo()
+
+// You can avoid calling Close() on an un-connected Actor (for example if
+// Bind() fails) by calling RemoveActor();
+template <typename T>
+class ToplevelActorHolder final {
+ public:
+  NS_INLINE_DECL_REFCOUNTING_ONEVENTTARGET(ToplevelActorHolder)
+
+  explicit ToplevelActorHolder(T* aActor) : mActor(aActor) {}
+
+  constexpr T* Actor() const { return mActor; }
+  inline void RemoveActor() { mActor = nullptr; }
+
+ private:
+  inline ~ToplevelActorHolder() {
+    if (mActor) {
+      mActor->Close();
+    }
+  }
+
+  RefPtr<T> mActor;
+};
+
+}  // namespace mozilla::ipc
+
+#endif  // MOZILLA_IPC_TOPLEVELACTORHOLDER_H