69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
|
/* Copyright (C) 1994 Free Software Foundation, Inc.
|
||
|
This file is part of the GNU C Library.
|
||
|
|
||
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
modify it under the terms of the GNU Library General Public License as
|
||
|
published by the Free Software Foundation; either version 2 of the
|
||
|
License, or (at your option) any later version.
|
||
|
|
||
|
The GNU C Library 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
|
||
|
Library General Public License for more details.
|
||
|
|
||
|
You should have received a copy of the GNU Library General Public
|
||
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
||
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||
|
Cambridge, MA 02139, USA. */
|
||
|
|
||
|
#include <hurd/signal.h>
|
||
|
|
||
|
/* Initialize PREEMPTER with the information given and stick it in the
|
||
|
chain of preempters for SIGNO. */
|
||
|
|
||
|
int
|
||
|
hurd_preempt_signals (struct hurd_signal_preempt *preempter,
|
||
|
int signo, int first_code, int last_code,
|
||
|
sighandler_t (*handler) (thread_t, int, long int, int))
|
||
|
{
|
||
|
if (signo <= 0 || signo >= NSIG)
|
||
|
{
|
||
|
errno = EINVAL;
|
||
|
return -1;
|
||
|
}
|
||
|
preempter->first = first_code;
|
||
|
preempter->last = last_code;
|
||
|
preempter->handler = handler;
|
||
|
__mutex_lock (&_hurd_signal_preempt_lock);
|
||
|
preempter->next = _hurd_signal_preempt[signo];
|
||
|
_hurd_signal_preempt[signo] = preempter;
|
||
|
__mutex_unlock (&_hurd_signal_preempt_lock);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/* Remove PREEMPTER from the chain for SIGNO. */
|
||
|
|
||
|
int
|
||
|
hurd_unpreempt_signals (struct hurd_signal_preempt *preempter, int signo)
|
||
|
{
|
||
|
struct hurd_signal_preempt *p, *lastp;
|
||
|
if (signo <= 0 || signo >= NSIG)
|
||
|
{
|
||
|
errno = EINVAL;
|
||
|
return -1;
|
||
|
}
|
||
|
__mutex_lock (&_hurd_signal_preempt_lock);
|
||
|
for (p = _hurd_signal_preempt[signo], lastp = NULL;
|
||
|
p != NULL; lastp = p, p = p->next)
|
||
|
if (p == preempter)
|
||
|
{
|
||
|
(lastp == NULL ? _hurd_signal_preempt[signo] : lastp->next) = p->next;
|
||
|
__mutex_unlock (&_hurd_signal_preempt_lock);
|
||
|
return 0;
|
||
|
}
|
||
|
_hurd_signal_preempt[signo] = preempter;
|
||
|
__mutex_unlock (&_hurd_signal_preempt_lock);
|
||
|
errno = ENOENT;
|
||
|
return -1;
|
||
|
}
|