/* __sigset_t manipulators.  Generic/BSD version.

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _SIGSETOPS_H

#define _SIGSETOPS_H 1

#include <signal.h>

/* Return a mask that includes SIG only.  The cast to `sigset_t' avoids

   overflow if `sigset_t' is wider than `int'.  */

# define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1))

#define __sigemptyset(set)			\

  (__extension__ ({				\

    *(set) = (__sigset_t) 0;			\

    0;						\

  }))

#define __sigfillset(set)			\

  (__extension__ ({				\

    *(set) = ~(__sigset_t) 0;			\

    0;						\

  }))

# define __sigisemptyset(set)			\

  (*(set) == (__sigset_t) 0)

# define __sigandset(dest, left, right)		\

  (__extension__ ({				\

    *(dest) = *(left) & *(right);		\

    0;						\

  }))

# define __sigorset(dest, left, right)		\

  (__extension__ ({				\

    *(dest) = *(left) | *(right);		\

    0;						\

  }))

/* These macros needn't check for a bogus signal number;

   checking is done in the non-__ versions.  */

# define __sigismember(set, sig)		\

  (__extension__ ({				\

    __sigset_t __mask = __sigmask (sig);	\

    *(set) & __mask ? 1 : 0;			\

  }))

# define __sigaddset(set, sig)			\

  (__extension__ ({				\

    __sigset_t __mask = __sigmask (sig);	\

    *(set) |= __mask;				\

    0;						\

  }))

# define __sigdelset(set, sig)			\

  (__extension__ ({				\

    __sigset_t __mask = __sigmask (sig);	\

    *(set) &= ~__mask;				\

    0;						\

  }))

#endif