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| 1 | /* Convert between lowlevel sigmask and libc representation of sigset_t. |
|---|---|
| 2 | Generic version. |
| 3 | Copyright (C) 1998-2022 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | |
| 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. |
| 10 | |
| 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. |
| 15 | |
| 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/>. */ |
| 19 | |
| 20 | /* Convert between an old-style 32-bit signal mask and a POSIX sigset_t. */ |
| 21 | |
| 22 | #include <sigsetops.h> |
| 23 | |
| 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) |
| 28 | { |
| 29 | if (sizeof (__sigset_t) == sizeof (unsigned int)) |
| 30 | *set = (unsigned int) mask; |
| 31 | else |
| 32 | { |
| 33 | unsigned int __sig; |
| 34 | |
| 35 | if (__sigemptyset (set) < 0) |
| 36 | return -1; |
| 37 | |
| 38 | for (__sig = 1; __sig < NSIG && __sig <= sizeof (mask) * 8; __sig++) |
| 39 | if (mask & __sigmask (__sig)) |
| 40 | if (__sigaddset (set, __sig) < 0) |
| 41 | return -1; |
| 42 | } |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 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) |
| 50 | { |
| 51 | if (sizeof (sigset_t) == sizeof (unsigned int)) |
| 52 | return (unsigned int) *set; |
| 53 | else |
| 54 | { |
| 55 | unsigned int mask = 0; |
| 56 | unsigned int sig; |
| 57 | |
| 58 | for (sig = 1; sig < NSIG && sig <= sizeof (mask) * 8; sig++) |
| 59 | if (__sigismember (set, sig)) |
| 60 | mask |= __sigmask (sig); |
| 61 | |
| 62 | return mask; |
| 63 | } |
| 64 | } |
| 65 |
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