doc: explain Worker semantics in async_hooks.md

PR-URL: #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>
nodejs · May 22, 2018 · 6caa3543774dcfb246dc50b20cdd5aa4ee854cc8 · 6caa354
1 parent ed05d9a
commit 6caa3543774dcfb246dc50b20cdd5aa4ee854cc8
Unified Split

Showing with 5 additions and 1 deletion.

+5 −1 doc/api/async_hooks.md
diff --git a/doc/api/async_hooks.md b/doc/api/async_hooks.md
@@ -21,6 +21,9 @@ A resource can also be closed before the callback is called. `AsyncHook` does
 not explicitly distinguish between these different cases but will represent them
 as the abstract concept that is a resource.
+  
+If [`Worker`][]s are used, each thread has an independent `async_hooks`
+  
+interface, and each thread will use a new set of async IDs.
+  
+
 ## Public API
 ### Overview
@@ -224,7 +227,7 @@ clearTimeout(setTimeout(() => {}, 10));
 ```
 Every new resource is assigned an ID that is unique within the scope of the
-  
-current process.
+  
+current Node.js instance.
 ###### `type`
@@ -725,3 +728,4 @@ never be called.
 [Hook Callbacks]: #async_hooks_hook_callbacks
 [PromiseHooks]: https://docs.google.com/document/d/1rda3yKGHimKIhg5YeoAmCOtyURgsbTH_qaYR79FELlk
 [promise execution tracking]: #async_hooks_promise_execution_tracking
+  
+[`Worker`]: worker.html#worker_worker