61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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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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#if defined(RT_USING_NEWLIB) || defined(_WIN32) || (defined( __GNUC__ ) && !defined(__ARMCC_VERSION))
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#include <sys/types.h>
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#if defined(HAVE_SYS_SELECT_H)
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#include <sys/select.h>
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#endif
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#else
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#ifdef SAL_USING_POSIX
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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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