1  /* Internal sigset_t definition.
       2     Copyright (C) 2022-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _INTERNAL_SIGSET_H
      20  #define _INTERNAL_SIGSET_H
      21  
      22  #include <sigsetops.h>
      23  
      24  typedef struct
      25  {
      26    unsigned long int __val[__NSIG_WORDS];
      27  } internal_sigset_t;
      28  
      29  static inline void
      30  internal_sigset_from_sigset (internal_sigset_t *iset, const sigset_t *set)
      31  {
      32    int cnt = __NSIG_WORDS;
      33    while (--cnt >= 0)
      34     iset->__val[cnt] = set->__val[cnt];
      35  }
      36  
      37  static inline void
      38  internal_sigemptyset (internal_sigset_t *set)
      39  {
      40    int cnt = __NSIG_WORDS;
      41    while (--cnt >= 0)
      42     set->__val[cnt] = 0;
      43  }
      44  
      45  static inline void
      46  internal_sigfillset (internal_sigset_t *set)
      47  {
      48    int cnt = __NSIG_WORDS;
      49    while (--cnt >= 0)
      50     set->__val[cnt] = ~0UL;
      51  }
      52  
      53  static inline int
      54  internal_sigisemptyset (const internal_sigset_t *set)
      55  {
      56    int cnt = __NSIG_WORDS;
      57    int ret = set->__val[--cnt];
      58    while (ret == 0 && --cnt >= 0)
      59      ret = set->__val[cnt];
      60    return ret == 0;
      61  }
      62  
      63  static inline void
      64  internal_sigandset (internal_sigset_t *dest, const internal_sigset_t *left,
      65  		    const internal_sigset_t *right)
      66  {
      67    int cnt = __NSIG_WORDS;
      68    while (--cnt >= 0)
      69      dest->__val[cnt] = left->__val[cnt] & right->__val[cnt];
      70  }
      71  
      72  static inline void
      73  internal_sigorset (internal_sigset_t *dest, const internal_sigset_t *left,
      74  		   const internal_sigset_t *right)
      75  {
      76    int cnt = __NSIG_WORDS;
      77    while (--cnt >= 0)
      78      dest->__val[cnt] = left->__val[cnt] | right->__val[cnt];
      79  }
      80  
      81  static inline int
      82  internal_sigismember (const internal_sigset_t *set, int sig)
      83  {
      84    unsigned long int mask = __sigmask (sig);
      85    unsigned long int word = __sigword (sig);
      86    return set->__val[word] & mask ? 1 : 0;
      87  }
      88  
      89  static inline void
      90  internal_sigaddset (internal_sigset_t *set, int sig)
      91  {
      92    unsigned long int mask = __sigmask (sig);
      93    unsigned long int word = __sigword (sig);
      94    set->__val[word] |= mask;
      95  }
      96  
      97  static inline void
      98  internal_sigdelset (internal_sigset_t *set, int sig)
      99  {
     100    unsigned long int mask = __sigmask (sig);
     101    unsigned long int word = __sigword (sig);
     102    set->__val[word] &= ~mask;
     103  }
     104  
     105  #endif /* _INTERNAL_SIGSET_H */