63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
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#ifndef _SYS_SELECT_H
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#define _SYS_SELECT_H
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/*
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** Distributed under the terms of the OpenBeOS License.
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*/
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#include <sys/time.h>
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#include <signal.h>
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/* If FD_SET is already defined, only the select() prototype is
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* exported in this header.
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*/
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#ifndef FD_SET
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/* You can define your own FDSETSIZE if you need more bits - but
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* it should be enough for most uses.
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*/
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#ifndef FD_SETSIZE
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# define FD_SETSIZE 1024
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#endif
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typedef unsigned long fd_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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#define NFDBITS (sizeof(fd_mask) * 8) /* bits per mask */
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typedef struct fd_set {
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fd_mask bits[_howmany(FD_SETSIZE, NFDBITS)];
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} fd_set;
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#define _FD_BITSINDEX(fd) ((fd) / NFDBITS)
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#define _FD_BIT(fd) (1L << ((fd) % NFDBITS))
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#define FD_ZERO(set) memset((set), 0, sizeof(fd_set))
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#define FD_SET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] |= _FD_BIT(fd))
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#define FD_CLR(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] &= ~_FD_BIT(fd))
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#define FD_ISSET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] & _FD_BIT(fd))
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#endif /* FD_SET */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef __HAIKU__
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extern int pselect(int numBits, struct fd_set *readBits, struct fd_set *writeBits,
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struct fd_set *errorBits, const struct timespec *timeout, const sigset_t *sigMask);
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#endif
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extern int select(int numBits, struct fd_set *readBits, struct fd_set *writeBits,
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struct fd_set *errorBits, 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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