worker: support MessagePort passing in messages

Support passing `MessagePort` instances through other `MessagePort`s,
as expected by the `MessagePort` spec.

Thanks to Stephen Belanger for reviewing this change in its original PR.

Refs: https://github.com/ayojs/ayo/pull/106

PR-URL: https://github.com/nodejs/node/pull/20876
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/node_messaging.h b/src/node_messaging.h
index 7bd60163ea..074267bb67 100644
--- a/src/node_messaging.h
+++ b/src/node_messaging.h
@@ -37,9 +37,14 @@ class Message {
                             v8::Local<v8::Value> input,
                             v8::Local<v8::Value> transfer_list);
 
+  // Internal method of Message that is called once serialization finishes
+  // and that transfers ownership of `data` to this message.
+  void AddMessagePort(std::unique_ptr<MessagePortData>&& data);
+
  private:
   MallocedBuffer<char> main_message_buf_;
   std::vector<MallocedBuffer<char>> array_buffer_contents_;
+  std::vector<std::unique_ptr<MessagePortData>> message_ports_;
 
   friend class MessagePort;
 };