1 /* Convert between lowlevel sigmask and libc representation of sigset_t.
3 Copyright (C) 1998-2023 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
20 /* Convert between an old-style 32-bit signal mask and a POSIX sigset_t. */
22 #include <sigsetops.h>
24 /* Perform *SET = MASK. Unused bits of *SET are set to 0.
25 Returns zero for success or -1 for errors (from sigaddset/sigemptyset). */
26 static inline int __attribute__ ((unused
))
27 sigset_set_old_mask (sigset_t
*set
, int mask
)
29 if (sizeof (__sigset_t
) == sizeof (unsigned int))
30 *set
= (unsigned int) mask
;
35 if (__sigemptyset (set
) < 0)
38 for (__sig
= 1; __sig
< NSIG
&& __sig
<= sizeof (mask
) * 8; __sig
++)
39 if (mask
& __sigmask (__sig
))
40 if (__sigaddset (set
, __sig
) < 0)
46 /* Return the sigmask corresponding to *SET.
47 Unused bits of *SET are thrown away. */
48 static inline int __attribute__ ((unused
))
49 sigset_get_old_mask (const sigset_t
*set
)
51 if (sizeof (sigset_t
) == sizeof (unsigned int))
52 return (unsigned int) *set
;
55 unsigned int mask
= 0;
58 for (sig
= 1; sig
< NSIG
&& sig
<= sizeof (mask
) * 8; sig
++)
59 if (__sigismember (set
, sig
))
60 mask
|= __sigmask (sig
);