diff options
Diffstat (limited to 'sys/sys/select.h')
| -rw-r--r-- | sys/sys/select.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sys/sys/select.h b/sys/sys/select.h new file mode 100644 index 0000000..3c7aa20 --- /dev/null +++ b/sys/sys/select.h @@ -0,0 +1,137 @@ +/* $OpenBSD: select.h,v 1.17 2016/09/12 19:41:20 guenther Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)select.h 8.2 (Berkeley) 1/4/94 + */ + +#ifndef _SYS_SELECT_H_ +#define _SYS_SELECT_H_ + +#include <sys/types.h> + +#ifndef _TIMEVAL_DECLARED +#define _TIMEVAL_DECLARED +struct timeval { + time_t tv_sec; /* seconds */ + suseconds_t tv_usec; /* and microseconds */ +}; +#endif + +#ifndef _TIMESPEC_DECLARED +#define _TIMESPEC_DECLARED +struct timespec { + time_t tv_sec; /* seconds */ + long tv_nsec; /* and nanoseconds */ +}; +#endif + +/* + * Select uses bit masks of file descriptors in longs. These macros + * manipulate such bit fields (the filesystem macros use chars). + * FD_SETSIZE may be defined by the user, but the default here should + * be enough for most uses. + */ +#ifndef FD_SETSIZE +#define FD_SETSIZE 1024 +#endif + +/* + * We don't want to pollute the namespace with select(2) internals. + * Non-underscore versions are exposed later #if __BSD_VISIBLE + */ +#define __NBBY 8 /* number of bits in a byte */ +typedef uint32_t __fd_mask; +#define __NFDBITS ((unsigned)(sizeof(__fd_mask) * __NBBY)) /* bits per mask */ +#define __howmany(x, y) (((x) + ((y) - 1)) / (y)) + +typedef struct fd_set { + __fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)]; +} fd_set; + +static __inline void +__fd_set(int fd, fd_set *p) +{ + p->fds_bits[fd / __NFDBITS] |= (1U << (fd % __NFDBITS)); +} +#define FD_SET(n, p) __fd_set((n), (p)) + +static __inline void +__fd_clr(int fd, fd_set *p) +{ + p->fds_bits[fd / __NFDBITS] &= ~(1U << (fd % __NFDBITS)); +} +#define FD_CLR(n, p) __fd_clr((n), (p)) + +static __inline int +__fd_isset(int fd, const fd_set *p) +{ + return (p->fds_bits[fd / __NFDBITS] & (1U << (fd % __NFDBITS))); +} +#define FD_ISSET(n, p) __fd_isset((n), (p)) + +#if __BSD_VISIBLE +#define FD_COPY(f, t) (void)(*(t) = *(f)) +#endif +#define FD_ZERO(p) do { \ + fd_set *_p = (p); \ + __size_t _n = __howmany(FD_SETSIZE, __NFDBITS); \ + \ + while (_n > 0) \ + _p->fds_bits[--_n] = 0; \ +} while (0) + +#if __BSD_VISIBLE +#define NBBY __NBBY +#define fd_mask __fd_mask +#define NFDBITS __NFDBITS +#ifndef howmany +#define howmany(x, y) __howmany(x, y) +#endif +#endif /* __BSD_VISIBLE */ + +#ifndef _KERNEL +#ifndef _SIGSET_T_DEFINED_ +#define _SIGSET_T_DEFINED_ +typedef unsigned int sigset_t; +#endif + +#ifndef _SELECT_DEFINED_ +#define _SELECT_DEFINED_ +__BEGIN_DECLS +int select(int, fd_set * __restrict, fd_set * __restrict, + fd_set * __restrict, struct timeval * __restrict); +int pselect(int, fd_set * __restrict, fd_set * __restrict, + fd_set * __restrict, const struct timespec * __restrict, + const sigset_t * __restrict); +__END_DECLS +#endif +#endif /* !_KERNEL */ + +#endif /* !_SYS_SELECT_H_ */ |