mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 02:50:09 +00:00
038ebe2459
Fri Jan 17 14:16:28 1997 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu> * stdio/vdprintf.c: Moved file to ... * sysdeps/posix/vdprintf.c: Here. De-ansideclificate. * sysdeps/stub/vdprintf.c: New file. * sysdeps/mach/hurd/vdprintf.c: New file.
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/* Copyright (C) 1996, 1997 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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <hurd.h>
|
|
#include <hurd/signal.h>
|
|
#include <hurd/msg.h>
|
|
#include <hurd/sigpreempt.h>
|
|
#include <assert.h>
|
|
|
|
/* Select any of pending signals from SET or wait for any to arrive. */
|
|
int
|
|
__sigwait (const sigset_t *set, int *sig)
|
|
{
|
|
struct hurd_sigstate *ss;
|
|
sigset_t mask;
|
|
int signo = 0;
|
|
struct hurd_signal_preemptor preemptor;
|
|
jmp_buf buf;
|
|
mach_port_t wait;
|
|
mach_msg_header_t msg;
|
|
|
|
sighandler_t
|
|
preempt_fun (struct hurd_signal_preemptor *pe,
|
|
struct hurd_sigstate *ss,
|
|
int *sigp,
|
|
struct hurd_signal_detail *detail)
|
|
{
|
|
if (signo)
|
|
/* We've already been run; don't interfere. */
|
|
return SIG_ERR;
|
|
|
|
signo = *sigp;
|
|
|
|
/* Make sure this is all kosher */
|
|
assert (__sigismember (&mask, signo));
|
|
|
|
/* Make sure this signal is unblocked */
|
|
__sigdelset (&ss->blocked, signo);
|
|
|
|
return pe->handler;
|
|
}
|
|
|
|
void
|
|
handler (int sig)
|
|
{
|
|
assert (sig == signo);
|
|
longjmp (buf, 1);
|
|
}
|
|
|
|
wait = __mach_reply_port ();
|
|
|
|
if (set != NULL)
|
|
/* Crash before locking */
|
|
mask = *set;
|
|
|
|
ss = _hurd_self_sigstate ();
|
|
__spin_lock (&ss->lock);
|
|
|
|
/* See if one of these signals is currently pending */
|
|
if (ss->pending & mask)
|
|
{
|
|
for (signo = 1; signo < NSIG; signo++)
|
|
if (__sigismember (&ss->pending, signo))
|
|
{
|
|
__sigdelset (&ss->pending, signo);
|
|
goto all_done;
|
|
}
|
|
/* Huh? Where'd it go? */
|
|
abort ();
|
|
}
|
|
|
|
/* Wait for one of them to show up */
|
|
|
|
if (!setjmp (buf))
|
|
{
|
|
/* Make the preemptor */
|
|
preemptor.signals = mask;
|
|
preemptor.first = 0;
|
|
preemptor.last = -1;
|
|
preemptor.preemptor = preempt_fun;
|
|
preemptor.handler = handler;
|
|
|
|
/* Install this preemptor */
|
|
preemptor.next = ss->preemptors;
|
|
ss->preemptors = &preemptor;
|
|
|
|
__spin_unlock (&ss->lock);
|
|
|
|
/* Wait. */
|
|
__mach_msg (&msg, MACH_RCV_MSG, 0, sizeof (msg), wait,
|
|
MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
|
|
abort ();
|
|
}
|
|
else
|
|
{
|
|
assert (signo);
|
|
|
|
__spin_lock (&ss->lock);
|
|
|
|
/* Delete our preemptor. */
|
|
assert (ss->preemptors == &preemptor);
|
|
ss->preemptors = preemptor.next;
|
|
}
|
|
|
|
|
|
all_done:
|
|
spin_unlock (&ss->lock);
|
|
|
|
__mach_port_destroy (__mach_task_self (), wait);
|
|
*sig = signo;
|
|
return 0;
|
|
}
|
|
|
|
weak_alias (__sigwait, sigwait)
|