61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* Copyright (c) 2006-2022, 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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* 2021-07-21 Meco Man The first version
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* 2021-12-25 Meco Man Handle newlib 2.2.0 or lower version
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*/
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#ifndef __SYS_SELECT_H__
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#define __SYS_SELECT_H__
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#include <rtthread.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#ifdef __cplusplus
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extern "C" {
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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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#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 /* SAL_USING_POSIX */
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typedef long fd_mask;
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#ifndef _SYS_TYPES_FD_SET /* Newlib 2.2.0 or lower version */
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#define NBBY 8 /* number of bits in a byte */
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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 /* howmany */
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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) rt_memset((void*)(p), 0, sizeof(*(p)))
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#endif /* _SYS_TYPES_FD_SET */
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int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __SYS_SELECT_H__ */
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