72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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* File : libc_errno.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-10-30 Bernard The first version
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*/
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#ifndef LIBC_FDSET_H__
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#define LIBC_FDSET_H__
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#include <rtconfig.h>
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#ifdef RT_USING_NEWLIB
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#include <sys/types.h>
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#else
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#ifdef RT_USING_DFS_NET
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#ifdef FD_SETSIZE
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#undef FD_SETSIZE
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#endif
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#define FD_SETSIZE DFS_FD_MAX
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#endif
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# ifndef FD_SETSIZE
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# define FD_SETSIZE 32
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# endif
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# define NBBY 8 /* number of bits in a byte */
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typedef long fd_mask;
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# define NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
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# ifndef howmany
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# define howmany(x,y) (((x)+((y)-1))/(y))
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# endif
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/* We use a macro for fd_set so that including Sockets.h afterwards
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can work. */
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typedef struct _types_fd_set {
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fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
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} _types_fd_set;
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#define fd_set _types_fd_set
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# define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS)))
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# define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS)))
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# define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS)))
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# define FD_ZERO(p) memset((void*)(p), 0, sizeof(*(p)))
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#endif
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#endif
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