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doc: explain Worker semantics in async_hooks.md

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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>
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Anna Henningsen 2018-05-22 21:47:06 +02:00
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doc/api/async_hooks.md
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@ -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