src: split ownsProcessState off isMainThread

Embedders may want to control whether a Node.js instance
controls the current process, similar to what we currently
have with `Worker`s.

Previously, the `isMainThread` flag had a bit of a double usage,
both for indicating whether we are (not) running a Worker and
whether we can modify per-process state.

PR-URL: https://github.com/nodejs/node/pull/25881
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/internal/worker.js b/lib/internal/worker.js
index f28f4cd663..1d1a5e7d22 100644
--- a/lib/internal/worker.js
+++ b/lib/internal/worker.js
@@ -30,9 +30,10 @@ const { deserializeError } = require('internal/error-serdes');
 const { pathToFileURL } = require('url');
 
 const {
-  Worker: WorkerImpl,
+  ownsProcessState,
+  isMainThread,
   threadId,
-  isMainThread
+  Worker: WorkerImpl,
 } = internalBinding('worker');
 
 const kHandle = Symbol('kHandle');
@@ -243,7 +244,8 @@ function pipeWithoutWarning(source, dest) {
 }
 
 module.exports = {
+  ownsProcessState,
+  isMainThread,
   threadId,
   Worker,
-  isMainThread
 };