1*53ee8cc1Swenshuai.xi /* Copyright (C) 1997, 1998, 2001 Free Software Foundation, Inc. 2*53ee8cc1Swenshuai.xi This file is part of the GNU C Library. 3*53ee8cc1Swenshuai.xi 4*53ee8cc1Swenshuai.xi The GNU C Library is free software; you can redistribute it and/or 5*53ee8cc1Swenshuai.xi modify it under the terms of the GNU Lesser General Public 6*53ee8cc1Swenshuai.xi License as published by the Free Software Foundation; either 7*53ee8cc1Swenshuai.xi version 2.1 of the License, or (at your option) any later version. 8*53ee8cc1Swenshuai.xi 9*53ee8cc1Swenshuai.xi The GNU C Library is distributed in the hope that it will be useful, 10*53ee8cc1Swenshuai.xi but WITHOUT ANY WARRANTY; without even the implied warranty of 11*53ee8cc1Swenshuai.xi MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12*53ee8cc1Swenshuai.xi Lesser General Public License for more details. 13*53ee8cc1Swenshuai.xi 14*53ee8cc1Swenshuai.xi You should have received a copy of the GNU Lesser General Public 15*53ee8cc1Swenshuai.xi License along with the GNU C Library; if not, write to the Free 16*53ee8cc1Swenshuai.xi Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17*53ee8cc1Swenshuai.xi 02111-1307 USA. */ 18*53ee8cc1Swenshuai.xi 19*53ee8cc1Swenshuai.xi #ifndef _SYS_SELECT_H 20*53ee8cc1Swenshuai.xi # error "Never use <bits/select.h> directly; include <sys/select.h> instead." 21*53ee8cc1Swenshuai.xi #endif 22*53ee8cc1Swenshuai.xi 23*53ee8cc1Swenshuai.xi 24*53ee8cc1Swenshuai.xi /* We don't use `memset' because this would require a prototype and 25*53ee8cc1Swenshuai.xi the array isn't too big. */ 26*53ee8cc1Swenshuai.xi #define __FD_ZERO(s) \ 27*53ee8cc1Swenshuai.xi do { \ 28*53ee8cc1Swenshuai.xi unsigned int __i; \ 29*53ee8cc1Swenshuai.xi fd_set *__arr = (s); \ 30*53ee8cc1Swenshuai.xi for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \ 31*53ee8cc1Swenshuai.xi __FDS_BITS (__arr)[__i] = 0; \ 32*53ee8cc1Swenshuai.xi } while (0) 33*53ee8cc1Swenshuai.xi #define __FD_SET(d, s) (__FDS_BITS (s)[__FDELT(d)] |= __FDMASK(d)) 34*53ee8cc1Swenshuai.xi #define __FD_CLR(d, s) (__FDS_BITS (s)[__FDELT(d)] &= ~__FDMASK(d)) 35*53ee8cc1Swenshuai.xi #define __FD_ISSET(d, s) ((__FDS_BITS (s)[__FDELT(d)] & __FDMASK(d)) != 0) 36