1 files changed, 34 insertions, 0 deletions
diff --git a/dom/midi/MIDIManagerParent.cpp b/dom/midi/MIDIManagerParent.cpp
new file mode 100644
index 0000000000..ef574f5b04
--- /dev/null
+++ b/dom/midi/MIDIManagerParent.cpp
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+
+#include "mozilla/dom/MIDIManagerParent.h"
+#include "mozilla/dom/MIDIPlatformService.h"
+
+namespace mozilla::dom {
+
+void MIDIManagerParent::ActorDestroy(ActorDestroyReason aWhy) {
+  if (MIDIPlatformService::IsRunning()) {
+    MIDIPlatformService::Get()->RemoveManager(this);
+  }
+}
+
+mozilla::ipc::IPCResult MIDIManagerParent::RecvRefresh() {
+  MIDIPlatformService::Get()->Refresh();
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult MIDIManagerParent::RecvShutdown() {
+  // The two-step shutdown process here is the standard way to ensure that the
+  // child receives any messages sent by the server (since either sending or
+  // receiving __delete__ prevents any further messages from being received).
+  // This was necessary before bug 1547085 when discarded messages would
+  // trigger a crash, and is probably unnecessary now, but we leave it in place
+  // just in case.
+  Close();
+  return IPC_OK();
+}
+
+}  // namespace mozilla::dom