1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
23 extern int __syscall_sigsuspend (int, unsigned long int, unsigned long int);
24 extern int __syscall_rt_sigsuspend (sigset_t *, size_t);
27 /* The variable is shared between all wrappers around signal handling
28 functions which have RT equivalents. */
29 int __libc_have_rt_sigs = 1;
32 /* Change the set of blocked signals to SET,
33 wait until a signal arrives, and restore the set of blocked signals. */
38 /* First try the RT signals. */
39 if (__libc_have_rt_sigs)
41 /* XXX The size argument hopefully will have to be changed to the
42 real size of the user-level sigset_t. */
43 int result = __syscall_rt_sigsuspend (set,
44 _NSIG / (8 * sizeof (long int)));
46 if (result >= 0 || errno != ENOSYS)
49 __libc_have_rt_sigs = 0;
52 return __syscall_sigsuspend (0, 0, set->__val[0]);
54 weak_alias (__sigsuspend, sigsuspend)