mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* Copyright (C) 2011 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
|
|
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 <signal.h>
|
|
#include <unistd.h>
|
|
#include <sysdep-cancel.h>
|
|
|
|
/* Suspend the process until a signal arrives.
|
|
This always returns -1 and sets errno to EINTR. */
|
|
|
|
static int
|
|
__syscall_pause (void)
|
|
{
|
|
sigset_t set;
|
|
|
|
int rc =
|
|
INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, _NSIG / 8);
|
|
if (rc == 0)
|
|
rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
__libc_pause (void)
|
|
{
|
|
if (SINGLE_THREAD_P)
|
|
return __syscall_pause ();
|
|
|
|
int oldtype = LIBC_CANCEL_ASYNC ();
|
|
|
|
int result = __syscall_pause ();
|
|
|
|
LIBC_CANCEL_RESET (oldtype);
|
|
|
|
return result;
|
|
}
|
|
weak_alias (__libc_pause, pause)
|
|
|
|
#ifndef NO_CANCELLATION
|
|
# include <not-cancel.h>
|
|
|
|
int
|
|
__pause_nocancel (void)
|
|
{
|
|
return __syscall_pause ();
|
|
}
|
|
#endif
|