src: refactor async callback handling

- Merge the two almost-but-not-quite identical `MakeCallback()`
  implementations
- Provide a public `CallbackScope` class for embedders in order
  to enable `MakeCallback()`-like behaviour without tying that
  to calling a JS function

PR-URL: https://github.com/nodejs/node/pull/14697
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/node_internals.h b/src/node_internals.h
index 9b6fae9d6a..9371d442ad 100644
--- a/src/node_internals.h
+++ b/src/node_internals.h
@@ -286,6 +286,14 @@ static v8::MaybeLocal<v8::Object> New(Environment* env,
 }
 }  // namespace Buffer
 
+v8::MaybeLocal<v8::Value> InternalMakeCallback(
+    Environment* env,
+    v8::Local<v8::Object> recv,
+    const v8::Local<v8::Function> callback,
+    int argc,
+    v8::Local<v8::Value> argv[],
+    async_context asyncContext);
+
 }  // namespace node
 
 #endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS