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)) sigset_set_old_mask(sigset_t * set,int mask)27sigset_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)) sigset_get_old_mask(const sigset_t * set)49sigset_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