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/* sigwaitinfo.c - Generic sigwaitinfo implementation.
Copyright (C) 2008 Free Software Foundation, Inc.
Written by Neal H. Walfield <neal@gnu.org>.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 3 of
the License, or (at your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program. If not, see
<http://www.gnu.org/licenses/>. */
#include <sig-internal.h>
#include <pt-internal.h>
int
sigwaitinfo (const sigset_t *restrict set, siginfo_t *restrict info)
{
pthread_mutex_lock (&sig_lock);
struct signal_state *ss = &_pthread_self ()->ss;
pthread_mutex_lock (&ss->lock);
if ((process_pending & *set) || (ss->pending & *set))
/* There is at least one signal pending. */
{
bool local = true;
sigset_t extant = process_pending & *set;
if (! extant)
{
local = false;
extant = ss->pending & *set;
}
assert (extant);
int signo = l4_msb64 (extant);
if (info)
{
if (local)
*info = ss->info[signo - 1];
else
*info = process_pending_info[signo - 1];
info->si_signo = signo;
}
sigdelset (&process_pending, signo);
sigdelset (&ss->pending, signo);
pthread_mutex_unlock (&ss->lock);
pthread_mutex_unlock (&sig_lock);
return 0;
}
siginfo_t i = sigwaiter_block (ss, set);
assert (i.si_signo);
assert ((sigmask (i.si_signo) & *set));
if (info)
*info = i;
return 0;
}
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