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/* 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
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