1 files changed, 47 insertions, 0 deletions
diff --git a/dom/messagechannel/PMessagePort.ipdl b/dom/messagechannel/PMessagePort.ipdl
new file mode 100644
index 0000000000..599e442df3
--- /dev/null
+++ b/dom/messagechannel/PMessagePort.ipdl
@@ -0,0 +1,47 @@
+/* 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 protocol PBackground;
+
+include DOMTypes;
+include ProtocolTypes;
+
+namespace mozilla {
+namespace dom {
+
+// This protocol is used for the MessageChannel/MessagePort API
+[ManualDealloc]
+protocol PMessagePort
+{
+  manager PBackground;
+
+  /* Many of these methods are used just for the shutdown sequence. The
+     correct sequence for the child actor is:
+     1. SendStopSendingData();
+     2. RecvStopSendingDataConfirmed();
+     3. SendClose();
+     4. Recv__delete__(); */
+
+  /* When the port is transferred the sequence is:
+     1. SendStopSendingData();
+     2. RecvStopSendingDataConfirmed();
+     3. SendDisentangle();
+     4. Recv__delete__(); */
+
+parent:
+  async PostMessages(MessageData[] messages);
+  async Disentangle(MessageData[] messages);
+  async StopSendingData();
+  async Close();
+
+child:
+  async Entangled(MessageData[] messages);
+  async ReceiveData(MessageData[] messages);
+  async StopSendingDataConfirmed();
+
+  async __delete__();
+};
+
+} // namespace dom
+} // namespace mozilla