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71a14d6483
1998-02-17 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/bits/select.h (__FD_ISSET): Compare result with 0 to get always an int. Make compatible with older kernels. Patch by Richard Henderson.
36 lines
1.6 KiB
C
36 lines
1.6 KiB
C
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _SYS_SELECT_H
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# error "Never use <bits/select.h> directly; include <sys/select.h> instead."
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#endif
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/* We don't use `memset' because this would require a prototype and
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the array isn't too big. */
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#define __FD_ZERO(set) \
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do { \
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unsigned int __i; \
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__fd_set *__arr = (set); \
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for (__i = 0; __i < sizeof (__fd_set) / sizeof (__fd_mask); ++__i) \
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__arr->fds_bits[__i] = '\0'; \
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} while (0)
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#define __FD_SET(d, set) ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
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#define __FD_CLR(d, set) ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d))
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#define __FD_ISSET(d, set) (((set)->fds_bits[__FDELT(d)] & __FDMASK(d)) != 0)
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