bug#65025: Possible race in make-frame

[Eli Zaretskii]

> Date: Wed, 2 Aug 2023 16:02:06 +0200
> From:  Anders Blomdell via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> When running
> 
>    /usr/bin/emacsclient --eval '(make-frame)'
> 
> it sometimes (often) opens up a small window (10x21) instead of the expected 
> 40x80 window.
> 
> Setting a hook for after-make-frame-functions like this:
> 
> (progn
>    (setq after-make-frame-functions nil)
>    (add-hook
>     'after-make-frame-functions
>     (lambda (frame)
>       (let ((width 80)
>             (height 40)
>             (start-width (frame-width frame))
>             (start-height (frame-height frame))
>             (visible (frame-visible-p frame)))
>         (print (format "Start %dx%d %S"
>                        start-height start-width visible))
>         (if (not visible)
>             (progn
>               (while
>                   (not (frame-visible-p frame))
>                 (progn
>                   (sleep-for 0.001)
>                   (print (format "X %dx%d"
>                                  (frame-height frame)
>                                  (frame-width frame)))
>                   ))
>               (sleep-for 0.001)
>               (print (format "Resetting %dx%d -> %dx%d"
>                              (frame-height frame) (frame-width frame)
>                              height width))
>               (set-frame-width frame width)
>               (set-frame-height frame height)
>               (sleep-for 0.1)
>               (print (format "Resetting %dx%d -> %dx%d"
>                              (frame-height frame) (frame-width frame)
>                              height width))
>               (set-frame-width frame width)
>               (set-frame-height frame height)
>               )
>               )
>           )
>         (print (format "Done %dx%d"
>                        (frame-height frame)
>                        (frame-width frame)))
>         )
>     )
>    )
> 
> 
> 
> usually has two different outcomes:
> 
>    "Start 10x38 t"
>    "Done 10x38"
> 
> or
> 
>    "Start 40x80 nil"
>    "X 40x80"
>    "X 40x80"
>    "X 40x80"
>    "X 10x21"
>    "Resetting 10x21 -> 40x80"
>    "Resetting 40x80 -> 40x80"
>    "Done 40x80"

Isn't this because we wait fro X to resize the frame after we ask for
it?