mirror of
https://review.haiku-os.org/haiku
synced 2025-01-18 20:48:48 +01:00
7ee61327ce
* Always declare FD_SET rather than conditionally. This matches the behavior of the glibc, musl, FreeBSD headers. * Simplify comments. * Leave the custom FD_SETSIZE possibility in place for now. Neither glibc nor musl permit this, but FreeBSD still does.
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/*
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* Copyright 2002-2024, Haiku, Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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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 <config/types.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <string.h>
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/* Custom FD_SETSIZEs can be defined if more bits are needed, but the default
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* should suffice for most uses. */
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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 __haiku_uint32 fd_mask;
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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[((FD_SETSIZE) + ((NFDBITS) - 1)) / (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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#define FD_COPY(source, target) (*(target) = *(source))
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#ifdef __cplusplus
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extern "C" {
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#endif
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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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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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