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Re: a bug of read-passwd
From: |
Chong Yidong |
Subject: |
Re: a bug of read-passwd |
Date: |
Mon, 24 Jul 2006 00:54:19 -0400 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Richard Stallman <address@hidden> writes:
> One solution is to set up a mechanism for the sit-for timer
> to determine that it has been called inside a filter.
> Then it needs to be able to set up for a certain function to be
> called when the filter returns.
>
> Another solution would be, don't use a timer.
> read-event works by calling wait_reading_process_output.
> It should be feasible to give it a new argument
> which specifies a maximum time delay.
OK, I looked into this. I think that fixing read-event to give it a
new argument specifying a max delay turns out to be not simple to
implement.
(The detailed situation is this: the old sit-for called
wait_reading_process_output for a given duration, but that's
problematic since wait_reading_process_output can return due to fake
events. The new sit-for solves this by calling read-event, which
relies on read_char, which loops calling wait_reading_process_output
with zero duration and discarding fake events [using
kbd_buffer_get_event, which does some complicated processing to figure
out if the event is fake or not]. The new sit-for interrupts this
loop using a timer. If we want to hack read_char to accept a new arg
specifying the max delay, there would be two sets of timing code:
inside read_char, and inside wait_reading_process_output. This is
very inelegant.)
Another possibility is to implement a `inhibit-timers' variable and
set it to t by default inside filter functions (similar to how
`inhibit-quit' is bound to t in filter functions.) This is probably
easier to implement. What do you think?
- address@hidden: a bug of read-passwd], Richard Stallman, 2006/07/15
- Re: address@hidden: a bug of read-passwd], Chong Yidong, 2006/07/15
- Re: address@hidden: a bug of read-passwd], 山本和彦, 2006/07/18
- Re: a bug of read-passwd, Richard Stallman, 2006/07/22
- Re: a bug of read-passwd, Chong Yidong, 2006/07/24
- Re: a bug of read-passwd,
Chong Yidong <=
- Re: a bug of read-passwd, Stefan Monnier, 2006/07/24
- Re: a bug of read-passwd, Chong Yidong, 2006/07/24
- Re: a bug of read-passwd, Stefan Monnier, 2006/07/24
- Re: a bug of read-passwd, Richard Stallman, 2006/07/24
- Re: a bug of read-passwd, Chong Yidong, 2006/07/26
- Re: a bug of read-passwd, Richard Stallman, 2006/07/26
- Re: a bug of read-passwd, Yidong Chong, 2006/07/26
- Re: a bug of read-passwd, 山本和彦, 2006/07/28