signal/sigsetops.h

   1 /* Copyright (C) 1991-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /* Definitions relevant to functions that operate on `sigset_t's.  */
  19
  20 #include <errno.h>
  21 #include <signal.h>
  22 #include <string.h>
  23
  24 #define BITS            (_NSIG - 1)
  25 #define ELT(signo)      (((signo) - 1) / BITS)
  26 #define MASK(signo)     (1 << (((signo) - 1) % BITS))
  27
  28 #undef  sigemptyset
  29 #undef  sigfillset
  30 #undef  sigaddset
  31 #undef  sigdelset
  32 #undef  sigismember