mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 11:30:06 +00:00
71733723fb
(hurd_preempt_signals, hurd_unpreempt_signals): Decls removed. * hurd/hurd/sigpreempt.h: New file. * hurd/preempt-sig.c: Rewritten with new interface. * sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Remove local signal preempters being unwound past. * db: New directory, 4.4 BSD db package incorporated from BSD db-1.85 release. * sysdeps/unix/sysv/linux/sys/param.h: Several new macros for BSD compatibility.
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/* Copyright (C) 1994, 1995, 1996 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/sigpreempt.h>
|
|
#include <hurd/signal.h>
|
|
#include <assert.h>
|
|
|
|
void
|
|
hurd_preempt_signals (struct hurd_signal_preempter *preempter)
|
|
{
|
|
__mutex_lock (&_hurd_siglock);
|
|
preempter->next = _hurdsig_preempters;
|
|
_hurdsig_preempters = preempter;
|
|
_hurdsig_preempted_set |= preempter->signals;
|
|
__mutex_unlock (&_hurd_siglock);
|
|
}
|
|
|
|
void
|
|
hurd_unpreempt_signals (struct hurd_signal_preempter *preempter)
|
|
{
|
|
struct hurd_signal_preempter **p;
|
|
sigset_t preempted = 0;
|
|
|
|
__mutex_lock (&_hurd_siglock);
|
|
|
|
p = &_hurdsig_preempters;
|
|
while (*p)
|
|
if (*p == preempter)
|
|
{
|
|
/* Found it; take it off the chain. */
|
|
*p = (*p)->next;
|
|
if ((preempter->signals & preempted) != preempter->signals)
|
|
{
|
|
/* This might have been the only preempter for some
|
|
of those signals, so we must collect the full mask
|
|
from the others. */
|
|
struct hurd_signal_preempter *pp;
|
|
for (pp = *p; pp; pp = pp->next)
|
|
preempted |= pp->signals;
|
|
_hurdsig_preempted_set = preempted;
|
|
}
|
|
__mutex_unlock (&_hurd_siglock);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
preempted |= (*p)->signals;
|
|
p = &(*p)->next;
|
|
}
|
|
|
|
__mutex_unlock (&_hurd_siglock); /* Avoid deadlock during death rattle. */
|
|
assert (! "removing absent preempter");
|
|
}
|