[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#69561: 30.0.50; Freeze from M-x gnus on macOS
From: |
Gerd Möllmann |
Subject: |
bug#69561: 30.0.50; Freeze from M-x gnus on macOS |
Date: |
Thu, 07 Mar 2024 16:18:00 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
(CC'd to Alan.)
As a reminder, the freezes are especially annoying because one cannot
C-g out of them. I read the NS code today, and I think I at least have a
strong suspicion why that is.
Let's just simplify things and say that the NS code has a queue named
hold_events_q of struct input_event (global variable). The queue is
filled when EmacsView receives NS events from the system, for example
C-g. NS events are processed by calling [NSApp run] with some
ornamention around it to make sure the calls returns. ns_select and
ns_read_socket do that.
The input_events in hold_events_q are given to Emacs in ns_read_socket,
which is installed for terminal type as read_socket_hook. That's how
normally a C-g is recognized by kdb_store_event and Vquit_flag is set.
But hold_events_q are _not_ kbd_store'd in ns_select. Instead we have
if (hold_event_q.nr > 0 && !run_loop_only)
{
/* We already have events pending. */
raise (SIGIO);
errno = EINTR;
return -1;
}
So, ns_select returns -1 to wait_reading_process_out which loops,
AFAICT.
if (nfds < 0)
{
if (xerrno == EINTR)
no_avail = 1;
...
if (no_avail || nfds == 0)
continue;
And Vquit_flag is never changing because the C-g is still in
hold_events_q, and maybe_quit does nothing.
Does that make sense?
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/05
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS,
Gerd Möllmann <=
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Alan Third, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Alan Third, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Alan Third, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Gerd Möllmann, 2024/03/07
- bug#69561: 30.0.50; Freeze from M-x gnus on macOS, Eli Zaretskii, 2024/03/09