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https://opencores.org/ocsvn/or1k_old/or1k_old/trunk
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Author |
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| 1 |
1325 |
phoenix |
/*
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* include/bits/select.h -- fd_set operations
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*
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* Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
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* Copyright (C) 2001 NEC Corporation
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* Copyright (C) 2001 Miles Bader <miles@gnu.org>
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* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License. See the file COPYING.LIB in the main
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* directory of this archive for more details.
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*/
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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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#ifdef __GNUC__
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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(s) \
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do { \
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unsigned int __i; \
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fd_set *__arr = (s); \
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for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \
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__FDS_BITS (__arr)[__i] = 0; \
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} while (0)
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#define __FD_SET(fd, s) \
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do { \
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int __fd = (fd); \
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unsigned int *__addr = (unsigned int *)&__FDS_BITS (s); \
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*__addr |= (1 << __fd); \
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} while (0)
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#define __FD_CLR(fd, s) \
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do { \
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int __fd = (fd); \
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unsigned int *__addr = (unsigned int *)&__FDS_BITS (s); \
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*__addr &= ~(1 << __fd); \
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} while (0)
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#define __FD_ISSET(fd, s) \
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({ \
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int __fd = (fd); \
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unsigned int *__addr = (unsigned int *)&__FDS_BITS (s); \
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int res; \
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res = (*__addr & (1 << fd)) ? 1 : 0; \
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})
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#else /* !__GNUC__ */
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#define __FD_SET(d, s) (__FDS_BITS (s)[__FDELT(d)] |= __FDMASK(d))
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#define __FD_CLR(d, s) (__FDS_BITS (s)[__FDELT(d)] &= ~__FDMASK(d))
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#define __FD_ISSET(d, s) ((__FDS_BITS (s)[__FDELT(d)] & __FDMASK(d)) != 0)
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#endif /* __GNUC__ */
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