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Fix "resource temporarily unavailable" with xgselect.

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* xgselect.c: Include <stdbool.h>.
(xg_select) [!USE_GTK]: Don't lose track of errno.

Fixes: debbugs:16925
This commit is contained in:
Paul Eggert 2014-03-04 22:31:57 -08:00
parent d2f720acf5
commit e6e8a5eb4d
2 changed files with 16 additions and 3 deletions
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4
src/ChangeLog
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@ -1,5 +1,9 @@
2014-03-05 Paul Eggert <eggert@cs.ucla.edu>
Fix "resource temporarily unavailable" with xgselect (Bug#16925).
* xgselect.c: Include <stdbool.h>.
(xg_select) [!USE_GTK]: Don't lose track of errno.
Fix minor --enable-gcc-warnings issues.
* widget.c (update_various_frame_slots, EmacsFrameResize):
Avoid unused locals. Prefer 'if' to '#if' when either will do.

15
src/xgselect.c
View file

@ -25,6 +25,7 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <glib.h>
#include <errno.h>
#include <stdbool.h>
#include <timespec.h>
#include "frame.h"
@ -43,6 +44,7 @@ xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
int gfds_size = sizeof gfds_buf / sizeof *gfds_buf;
int n_gfds, retval = 0, our_fds = 0, max_fds = fds_lim - 1;
int i, nfds, tmo_in_millisec;
bool need_to_dispatch;
USE_SAFE_ALLOCA;
/* Do not try to optimize with an initial check with g_main_context_pending
@ -127,10 +129,17 @@ xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
/* If Gtk+ is in use eventually gtk_main_iteration will be called,
unless retval is zero. */
#ifdef USE_GTK
if (retval == 0)
need_to_dispatch = retval == 0;
#else
need_to_dispatch = true;
#endif
while (g_main_context_pending (context))
g_main_context_dispatch (context);
if (need_to_dispatch)
{
int pselect_errno = errno;
while (g_main_context_pending (context))
g_main_context_dispatch (context);
errno = pselect_errno;
}
/* To not have to recalculate timeout, return like this. */
if ((our_fds > 0 || (nfds == 0 && tmop == &tmo)) && (retval == 0))