worker,fs: make FileHandle transferable

Allow passing `FileHandle` instances in the transfer list
of a `.postMessage()` call.

PR-URL: https://github.com/nodejs/node/pull/33772
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/node_file.h b/src/node_file.h
index ad493bd944c..fd17fc99d52 100644
--- a/src/node_file.h
+++ b/src/node_file.h
@@ -5,6 +5,7 @@
 
 #include "node.h"
 #include "aliased_buffer.h"
+#include "node_messaging.h"
 #include "stream_base.h"
 #include <iostream>
 
@@ -273,7 +274,28 @@ class FileHandle final : public AsyncWrap, public StreamBase {
   FileHandle(const FileHandle&&) = delete;
   FileHandle& operator=(const FileHandle&&) = delete;
 
+  TransferMode GetTransferMode() const override;
+  std::unique_ptr<worker::TransferData> TransferForMessaging() override;
+
  private:
+  class TransferData : public worker::TransferData {
+   public:
+    explicit TransferData(int fd);
+    ~TransferData();
+
+    BaseObjectPtr<BaseObject> Deserialize(
+        Environment* env,
+        v8::Local<v8::Context> context,
+        std::unique_ptr<worker::TransferData> self) override;
+
+    SET_NO_MEMORY_INFO()
+    SET_MEMORY_INFO_NAME(FileHandleTransferData)
+    SET_SELF_SIZE(TransferData)
+
+   private:
+    int fd_;
+  };
+
   FileHandle(BindingData* binding_data, v8::Local<v8::Object> obj, int fd);
 
   // Synchronous close that emits a warning