mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
988f991b50
There is no current internal usage for non cancellable sigsuspend calls. Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu. * sysdeps/generic/not-cancel.h (sigsuspend_not_cancel): remove macro. * sysdeps/mach/hurd/sigsuspend.c (sigsuspend_not_cancel): remove alias. * sysdeps/unix/sysv/linux/not-cancel.h (sigsuspend_not_cancel): likewise.
83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/* Copyright (C) 1991-2017 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <hurd.h>
|
|
#include <hurd/signal.h>
|
|
#include <hurd/msg.h>
|
|
|
|
/* Change the set of blocked signals to SET,
|
|
wait until a signal arrives, and restore the set of blocked signals. */
|
|
int
|
|
__sigsuspend (const sigset_t *set)
|
|
{
|
|
struct hurd_sigstate *ss;
|
|
sigset_t newmask, oldmask, pending;
|
|
mach_port_t wait;
|
|
mach_msg_header_t msg;
|
|
|
|
if (set != NULL)
|
|
/* Crash before locking. */
|
|
newmask = *set;
|
|
|
|
/* Get a fresh port we will wait on. */
|
|
wait = __mach_reply_port ();
|
|
|
|
ss = _hurd_self_sigstate ();
|
|
|
|
__spin_lock (&ss->lock);
|
|
|
|
oldmask = ss->blocked;
|
|
if (set != NULL)
|
|
/* Change to the new blocked signal mask. */
|
|
ss->blocked = newmask & ~_SIG_CANT_MASK;
|
|
|
|
/* Notice if any pending signals just became unblocked. */
|
|
pending = ss->pending & ~ss->blocked;
|
|
|
|
/* Tell the signal thread to message us when a signal arrives. */
|
|
ss->suspended = wait;
|
|
__spin_unlock (&ss->lock);
|
|
|
|
if (pending)
|
|
/* Tell the signal thread to check for pending signals. */
|
|
__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
|
|
|
|
/* Wait for the signal thread's message. */
|
|
__mach_msg (&msg, MACH_RCV_MSG, 0, sizeof (msg), wait,
|
|
MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
|
|
__mach_port_destroy (__mach_task_self (), wait);
|
|
|
|
__spin_lock (&ss->lock);
|
|
ss->blocked = oldmask; /* Restore the old mask. */
|
|
pending = ss->pending & ~ss->blocked; /* Again check for pending signals. */
|
|
__spin_unlock (&ss->lock);
|
|
|
|
if (pending)
|
|
/* Tell the signal thread to check for pending signals. */
|
|
__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
|
|
|
|
/* We've been interrupted! And a good thing, too.
|
|
Otherwise we'd never return.
|
|
That's right; this function always returns an error. */
|
|
errno = EINTR;
|
|
return -1;
|
|
}
|
|
libc_hidden_def (__sigsuspend)
|
|
weak_alias (__sigsuspend, sigsuspend)
|