1: /* __sig_atomic_t, __sigset_t, and related definitions.  Generic/BSD version.
    2:    Copyright (C) 1991, 1992, 1994, 1996, 1997, 2007
    3:    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, write to the Free
   18:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   19:    02111-1307 USA.  */
   20: 
   21: #ifndef _SIGSET_H_types
   22: #define _SIGSET_H_types 1
   23: 
   24: typedef int __sig_atomic_t;
   25: 
   26: /* A `sigset_t' has a bit for each signal.  */
   27: typedef unsigned long int __sigset_t;
   28: 
   29: #endif
   30: 
   31: 
   32: /* We only want to define these functions if <signal.h> was actually
   33:    included; otherwise we were included just to define the types.  Since we
   34:    are namespace-clean, it wouldn't hurt to define extra macros.  But
   35:    trouble can be caused by functions being defined (e.g., any global
   36:    register vars declared later will cause compilation errors).  */
   37: 
   38: #if !defined _SIGSET_H_fns && defined _SIGNAL_H
   39: #define _SIGSET_H_fns 1
   40: 
   41: #ifndef _EXTERN_INLINE
   42: # define _EXTERN_INLINE __extern_inline
   43: #endif
   44: 
   45: /* Return a mask that includes SIG only.  The cast to `sigset_t' avoids
   46:    overflow if `sigset_t' is wider than `int'.  */
   47: #define __sigmask(sig)  (((__sigset_t) 1) << ((sig) - 1))
   48: 
   49: #define __sigemptyset(set)      ((*(set) = (__sigset_t) 0), 0)
   50: #define __sigfillset(set)       ((*(set) = ~(__sigset_t) 0), 0)
   51: 
   52: #ifdef _GNU_SOURCE
   53: # define __sigisemptyset(set)   (*(set) == (__sigset_t) 0)
   54: # define __sigandset(dest, left, right) \
   55:                                 ((*(dest) = (*(left) & *(right))), 0)
   56: # define __sigorset(dest, left, right) \
   57:                                 ((*(dest) = (*(left) | *(right))), 0)
   58: #endif
   59: 
   60: /* These functions needn't check for a bogus signal number -- error
   61:    checking is done in the non __ versions.  */
   62: 
   63: extern int __sigismember (__const __sigset_t *, int);
   64: extern int __sigaddset (__sigset_t *, int);
   65: extern int __sigdelset (__sigset_t *, int);
   66: 
   67: #ifdef __USE_EXTERN_INLINES
   68: # define __SIGSETFN(NAME, BODY, CONST)                                        \
   69:   _EXTERN_INLINE int                                                          \
   70:   NAME (CONST __sigset_t *__set, int __sig)                                   \
   71:   {                                                                           \
   72:     __sigset_t __mask = __sigmask (__sig);                                    \
   73:     return BODY;                                                              \
   74:   }
   75: 
   76: __SIGSETFN (__sigismember, (*__set & __mask) ? 1 : 0, __const)
   77: __SIGSETFN (__sigaddset, ((*__set |= __mask), 0), )
   78: __SIGSETFN (__sigdelset, ((*__set &= ~__mask), 0), )
   79: 
   80: # undef __SIGSETFN
   81: #endif
   82: 
   83: 
   84: #endif /* ! _SIGSET_H_fns.  */