| 1 | /* Copyright (C) 1997-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #ifndef _SYS_SELECT_H |
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| 19 | # error "Never use <bits/select.h> directly; include <sys/select.h> instead." |
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| 20 | #endif |
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| 21 | |
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| 22 | |
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| 23 | /* We don't use `memset' because this would require a prototype and |
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| 24 | the array isn't too big. */ |
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| 25 | #define __FD_ZERO(s) \ |
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| 26 | do { \ |
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| 27 | unsigned int __i; \ |
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| 28 | fd_set *__arr = (s); \ |
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| 29 | for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \ |
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| 30 | __FDS_BITS (__arr)[__i] = 0; \ |
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| 31 | } while (0) |
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| 32 | #define __FD_SET(d, s) \ |
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| 33 | ((void) (__FDS_BITS (s)[__FD_ELT(d)] |= __FD_MASK(d))) |
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| 34 | #define __FD_CLR(d, s) \ |
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| 35 | ((void) (__FDS_BITS (s)[__FD_ELT(d)] &= ~__FD_MASK(d))) |
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| 36 | #define __FD_ISSET(d, s) \ |
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| 37 | ((__FDS_BITS (s)[__FD_ELT (d)] & __FD_MASK (d)) != 0) |
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| 38 | |
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