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In-Reply-To: <92865666.4510.1763818506332@email.ionos.de>
Date: Sat, 22 Nov 2025 15:55:32 +0200
Message-ID: <CAMW7n8AycfX4NMfjJ+GzFsPqRaSae-t7Cm3H5z8apRzXUgaVZw@mail.gmail.com>
Subject: Re: [PHP-DEV] [VOTE] True Async RFC 1.6
To: Thomas Bley <mails@thomasbley.de>
Cc: internals@lists.php.net
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From: edmond.ht@gmail.com (Edmond Dantes)

> So I guess you want to use spawn() in a similar way as call_user_func() w=
orks.
yes

> This changes the behavior of file_get_contents() from the outside
No.

```php
function file_get_contents(string $filename): string
{
    $fh =3D fopen();

    // It creates an EPOLL event so it can wake us when the data
becomes available.
     $event =3D ReactorAPI.create_event_from($fh);
    $waker =3D Scheduler.getCurrentWaker();
    // Event Driven logic inside.
    $waker.add_event($event, function() use($waker) {
          // Wakeup this coroutine
          $waker.wake();
     });

    // suspend current coroutine
    // zz..... z.....
    Scheduler.suspend();

    // Continue here after the IO event

    // Now we have date, return
    return fread($fh, ....);
}
```

This is pseudocode. You can assume it always works.
If you call `file_get_contents` directly, it behaves the same way.
So it does not matter where `file_get_contents` is called.
Since all PHP code together with TrueAsync runs inside coroutines,
`file_get_contents` will suspend the coroutine in which it was invoked.

When you call `spawn`, you simply run the function in another
coroutine, not in your own. But `spawn` has no effect on
`file_get_contents`.

We=E2=80=99re not at risk of DataRace yet :) We don=E2=80=99t have multithr=
eading.
And most likely it won=E2=80=99t appear anytime soon.