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From: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Kai Grossjohann <kai@emptydomain.de>, emacs-devel@gnu.org
Subject: Re: Tramp with global-auto-revert-mode.
Date: 14 May 2004 13:06:03 -0400	[thread overview]
Message-ID: <jwvy8nv7xxa.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <x5k6zf43hz.fsf@lola.goethe.zz>

> Work properly if they are on a different connection.  Queue them if
> they are on the same connection.

Can't queue 'em.

Scenario:

        file-exist-p -> Tramp -> accept-process-output
        <<Now process filters and sentinels and timers can be run>>
        One of those async thingies calls
        file-readable-p -> Tramp -> ????

If it's on the same connection Tramp is stuck: its connection is either
busy waiting for some answer from the remote host (which is OK: we can
wait) or busy waiting for accept-process-output to return so Emacs can
react to the remote process's output; but accept-process-output can't return
before file-readable-p is finished.  Sending new commands to perform
file-readable-p canbe tricky because the remote shell might be in any
intermediate state, so we'd need to detect this state, save it and restore
it when done.  Or else open up a new connection.

Note that the above also shows that async code is not only run when you call
accept-process-output or sit-for or sleep-for or read-kbd-sequence: it can
also be run when you call file-exists-p.  I.e.

     (let ((default-directory "/a"))
       (if (file-exists-p default-directory) default-directory))

can return "/b" (if one of the process filters changes default-directory).


        Stefan

  reply	other threads:[~2004-05-14 17:06 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-05-12 22:54 Tramp with global-auto-revert-mode Luc Teirlinck
2004-05-12 23:26 ` Luc Teirlinck
2004-05-13 23:11   ` Kim F. Storm
2004-05-13 23:24     ` Luc Teirlinck
2004-05-13 23:46       ` Kim F. Storm
2004-05-14  0:08         ` Luc Teirlinck
2004-05-14  1:17           ` Stefan Monnier
2004-05-14  1:32             ` Luc Teirlinck
2004-05-14  2:35               ` Stefan Monnier
2004-05-14  2:53                 ` Luc Teirlinck
2004-05-14  3:08                 ` Luc Teirlinck
2004-05-14  4:16                   ` Stefan Monnier
2004-05-14  4:45                     ` Luc Teirlinck
2004-05-14  5:09                       ` Stefan Monnier
2004-05-14 19:13                         ` Luc Teirlinck
2004-05-14 21:02                       ` Richard Stallman
2004-05-14  5:01                     ` Luc Teirlinck
2004-05-14 23:00                     ` Kim F. Storm
2004-05-15  0:44                       ` Luc Teirlinck
2004-05-15  1:39                       ` Luc Teirlinck
2004-05-15 18:34                         ` Richard Stallman
2004-05-15 20:44                           ` Luc Teirlinck
2004-05-15 23:44                             ` Luc Teirlinck
2004-05-16  0:41                               ` Luc Teirlinck
2004-05-16 13:52                                 ` Andreas Schwab
2004-05-17 11:04                               ` Richard Stallman
2004-05-17 14:20                                 ` Luc Teirlinck
2004-05-16  5:58                             ` Eli Zaretskii
2004-05-16 18:11                               ` Luc Teirlinck
2004-05-16 18:32                                 ` Luc Teirlinck
2004-05-16 20:04                                 ` Luc Teirlinck
2004-05-16 22:41                                   ` Kim F. Storm
2004-05-17  5:21                                     ` Kai Grossjohann
2004-05-17 12:45                                     ` Kim F. Storm
2004-05-17 15:03                                       ` Luc Teirlinck
2004-05-17 15:22                                         ` Kim F. Storm
2004-05-18 16:25                                       ` Stefan Monnier
2004-05-18 17:10                                         ` Luc Teirlinck
2004-05-21 23:44                                           ` Kim F. Storm
2004-05-22  1:08                                             ` Luc Teirlinck
2004-05-22 11:52                                               ` Kim F. Storm
2004-05-23 17:21                                                 ` Michael Albinus
2004-05-17  6:04                                 ` Eli Zaretskii
2004-05-15  2:50                       ` Luc Teirlinck
2004-05-15 13:19                         ` Andreas Schwab
2004-05-15 13:34                           ` Luc Teirlinck
2004-05-15 16:45                             ` Andreas Schwab
2004-05-15 17:49                               ` Luc Teirlinck
2004-05-15 13:51                           ` Luc Teirlinck
2004-05-15 18:26                             ` Eli Zaretskii
2004-05-15  3:23                       ` Luc Teirlinck
2004-05-15 18:02                       ` Luc Teirlinck
2004-05-14 21:02               ` Richard Stallman
2004-05-14  2:31             ` Luc Teirlinck
2004-05-14  5:32               ` Luc Teirlinck
2004-05-14 11:36             ` Kai Grossjohann
2004-05-14 12:06               ` David Kastrup
2004-05-14 17:06                 ` Stefan Monnier [this message]
2004-05-14 17:54                   ` David Kastrup
2004-05-14 18:30                     ` Stefan Monnier
2004-05-14 19:08                     ` Kim F. Storm
2004-05-14 19:26                       ` David Kastrup
2004-05-14 20:33                         ` Kim F. Storm
2004-05-14 21:00                           ` David Kastrup
2004-05-14 21:19                             ` Kim F. Storm
2004-05-14 21:33                               ` Stefan Monnier
2004-05-14 22:55                                 ` Kim F. Storm
2004-05-14 23:04                                   ` Stefan Monnier
2004-05-15 18:33                                 ` Richard Stallman
2004-05-14 22:11                               ` David Kastrup
2004-05-14 22:57                                 ` Kim F. Storm
2004-05-14 22:47                           ` Luc Teirlinck
2004-05-14 23:14                             ` Kim F. Storm
2004-05-14 23:38                               ` Luc Teirlinck
2004-05-14 22:50                           ` Luc Teirlinck
2004-05-14 23:00                           ` Luc Teirlinck
2004-05-14 20:40                       ` Kai Grossjohann
2004-05-14 23:26                         ` David Kastrup
2004-05-15 16:19                           ` Kai Grossjohann
2004-05-15 17:01                             ` David Kastrup
2004-05-15 17:26                               ` Kai Grossjohann
2004-05-15 18:18                                 ` David Kastrup
2004-05-16 14:11                                   ` Kai Grossjohann
2004-05-15 18:33                     ` Richard Stallman
2004-05-16 14:13                       ` Kai Grossjohann
2004-05-17  1:14                         ` Luc Teirlinck
2004-05-17 22:58                         ` Richard Stallman
2004-05-18  3:44                           ` Luc Teirlinck
2004-05-14 20:32                   ` Kai Grossjohann
2004-05-14 21:35                     ` Michael Albinus
2004-05-15 16:22                       ` Kai Grossjohann
2004-05-14 20:29                 ` Kai Grossjohann
2004-05-14 21:02       ` Richard Stallman
2004-05-14  0:54     ` Luc Teirlinck
2004-05-14  2:13     ` Luc Teirlinck

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