Current File : //usr/include/x86_64-linux-gnu/bits/select.h
/* Copyright (C) 1997-2024 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
<https://www.gnu.org/licenses/>. */
#ifndef _SYS_SELECT_H
# error "Never use <bits/select.h> directly; include <sys/select.h> instead."
#endif
/* We don't use `memset' because this would require a prototype and
the array isn't too big. */
#define __FD_ZERO(s) \
do { \
unsigned int __i; \
fd_set *__arr = (s); \
for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \
__FDS_BITS (__arr)[__i] = 0; \
} while (0)
#define __FD_SET(d, s) \
((void) (__FDS_BITS (s)[__FD_ELT(d)] |= __FD_MASK(d)))
#define __FD_CLR(d, s) \
((void) (__FDS_BITS (s)[__FD_ELT(d)] &= ~__FD_MASK(d)))
#define __FD_ISSET(d, s) \
((__FDS_BITS (s)[__FD_ELT (d)] & __FD_MASK (d)) != 0)
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