From: Paul Eggert <eggert@cs.ucla.edu>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: 17172@debbugs.gnu.org
Subject: bug#17172: 24.3.50; Timeouts when pasting from mouse
Date: Tue, 15 Apr 2014 01:02:34 -0700 [thread overview]
Message-ID: <534CE79A.3030600@cs.ucla.edu> (raw)
In-Reply-To: <87eh1fsved.fsf@linaro.org>
[-- Attachment #1: Type: text/plain, Size: 348 bytes --]
Thanks for the bug report. I can't reproduce the problem on my Fedora
20 x86-64 desktop, but in reviewing xgselect.c I see some glitches that
could explain things. Please try the attached patch and let us know
whether it helps with your problem. Please compile with
-DENABLE_CHECKING so that the patch's 'eassert' calls have teeth. Thanks.
[-- Attachment #2: xgselect.diff --]
[-- Type: text/plain, Size: 3504 bytes --]
=== modified file 'src/xgselect.c'
--- src/xgselect.c 2014-03-05 06:31:57 +0000
+++ src/xgselect.c 2014-04-15 07:52:04 +0000
@@ -33,16 +33,15 @@
xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
struct timespec const *timeout, sigset_t const *sigmask)
{
- fd_set all_rfds, all_wfds;
+ fd_set all_rfds, all_wfds, all_efds;
struct timespec tmo;
struct timespec const *tmop = timeout;
GMainContext *context;
- int have_wfds = wfds != NULL;
GPollFD gfds_buf[128];
GPollFD *gfds = gfds_buf;
int gfds_size = sizeof gfds_buf / sizeof *gfds_buf;
- int n_gfds, retval = 0, our_fds = 0, max_fds = fds_lim - 1;
+ int n_gfds, retval = 0, all_lim = fds_lim;
int i, nfds, tmo_in_millisec;
bool need_to_dispatch;
USE_SAFE_ALLOCA;
@@ -59,6 +58,8 @@
else FD_ZERO (&all_rfds);
if (wfds) all_wfds = *wfds;
else FD_ZERO (&all_wfds);
+ eassert (!efds);
+ FD_ZERO (&all_efds);
n_gfds = g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size);
@@ -71,19 +72,28 @@
}
for (i = 0; i < n_gfds; ++i)
- {
- if (gfds[i].events & G_IO_IN)
- {
- FD_SET (gfds[i].fd, &all_rfds);
- if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
- }
- if (gfds[i].events & G_IO_OUT)
- {
- FD_SET (gfds[i].fd, &all_wfds);
- if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
- have_wfds = 1;
- }
- }
+ if (gfds[i].events & (G_IO_IN | G_IO_OUT | G_IO_PRI))
+ {
+ int fd = gfds[i].fd;
+ eassert (0 <= fd && fd < FD_SETSIZE);
+ for (; all_lim <= fd; all_lim++)
+ {
+ FD_CLR (all_lim, &all_rfds);
+ FD_CLR (all_lim, &all_wfds);
+ }
+ if (gfds[i].events & G_IO_IN)
+ {
+ eassert (! (rfds && fd < fds_lim && FD_ISSET (fd, rfds)));
+ FD_SET (fd, &all_rfds);
+ }
+ if (gfds[i].events & G_IO_OUT)
+ {
+ eassert (! (wfds && fd < fds_lim && FD_ISSET (fd, wfds)));
+ FD_SET (fd, &all_wfds);
+ }
+ if (gfds[i].events & G_IO_PRI)
+ FD_SET (fd, &all_efds);
+ }
SAFE_FREE ();
@@ -95,34 +105,28 @@
tmop = &tmo;
}
- fds_lim = max_fds + 1;
- nfds = pselect (fds_lim, &all_rfds, have_wfds ? &all_wfds : NULL,
- efds, tmop, sigmask);
+ nfds = pselect (all_lim, &all_rfds, &all_wfds, &all_efds, tmop, sigmask);
if (nfds < 0)
retval = nfds;
- else if (nfds > 0)
+ else
{
for (i = 0; i < fds_lim; ++i)
{
- if (FD_ISSET (i, &all_rfds))
- {
- if (rfds && FD_ISSET (i, rfds)) ++retval;
- else ++our_fds;
- }
- else if (rfds)
- FD_CLR (i, rfds);
-
- if (have_wfds && FD_ISSET (i, &all_wfds))
- {
- if (wfds && FD_ISSET (i, wfds)) ++retval;
- else ++our_fds;
- }
- else if (wfds)
- FD_CLR (i, wfds);
-
- if (efds && FD_ISSET (i, efds))
- ++retval;
+ if (rfds && FD_ISSET (i, rfds))
+ {
+ if (FD_ISSET (i, &all_rfds))
+ retval++;
+ else
+ FD_CLR (i, rfds);
+ }
+ if (wfds && FD_ISSET (i, wfds))
+ {
+ if (FD_ISSET (i, &all_wfds))
+ retval++;
+ else
+ FD_CLR (i, wfds);
+ }
}
}
@@ -142,7 +146,7 @@
}
/* To not have to recalculate timeout, return like this. */
- if ((our_fds > 0 || (nfds == 0 && tmop == &tmo)) && (retval == 0))
+ if (retval == 0 && (0 < nfds || tmop == &tmo))
{
retval = -1;
errno = EINTR;
next prev parent reply other threads:[~2014-04-15 8:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-02 13:39 bug#17172: 24.3.50; Timeouts when pasting from mouse Alex Bennée
2014-04-15 8:02 ` Paul Eggert [this message]
2014-04-15 10:17 ` Jan D.
2014-04-15 11:10 ` Nicolas Richard
2014-04-15 14:01 ` Alex Bennée
2014-04-15 16:01 ` Paul Eggert
2014-04-15 17:29 ` Jan Djärv
2014-04-15 20:19 ` Paul Eggert
2014-04-15 20:41 ` Jan Djärv
2014-04-17 7:53 ` Jan Djärv
2014-04-17 8:33 ` Nicolas Richard
2014-04-17 9:20 ` Jan Djärv
2014-04-17 10:19 ` Nicolas Richard
2014-04-17 12:10 ` Jan Djärv
2014-04-29 9:22 ` Nicolas Richard
2014-04-17 16:31 ` Jan Djärv
2014-04-15 16:00 ` Eli Zaretskii
2014-04-29 9:22 ` Nicolas Richard
2014-12-24 16:58 ` bug#17172: Timeouts when pasting David A. Thompson
2014-12-27 10:39 ` Torsten Bronger
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