1 /* Copyright (C) 1997, 1998, 2001 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, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #ifndef _SYS_SELECT_H 20 # error "Never use <bits/select.h> directly; include <sys/select.h> instead." 21 #endif 22 23 24 /* We don't use `memset' because this would require a prototype and 25 the array isn't too big. */ 26 #define __FD_ZERO(s) \ 27 do { \ 28 unsigned int __i; \ 29 fd_set *__arr = (s); \ 30 for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \ 31 __FDS_BITS (__arr)[__i] = 0; \ 32 } while (0) 33 #define __FD_SET(d, s) (__FDS_BITS (s)[__FDELT(d)] |= __FDMASK(d)) 34 #define __FD_CLR(d, s) (__FDS_BITS (s)[__FDELT(d)] &= ~__FDMASK(d)) 35 #define __FD_ISSET(d, s) ((__FDS_BITS (s)[__FDELT(d)] & __FDMASK(d)) != 0) 36
