2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/* $NetBSD: fd_set.h,v 1.2 2005/12/11 12:25:20 christos 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.
|
|
*
|
|
* from: @(#)types.h 8.4 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
#ifndef _SYS_FD_SET_H_
|
|
#define _SYS_FD_SET_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/featuretest.h>
|
|
#include <sys/syslimits.h>
|
|
#include <machine/int_types.h>
|
|
|
|
/*
|
|
* Implementation dependent defines, hidden from user space. X/Open does not
|
|
* specify them.
|
|
*/
|
|
#define __NBBY 8 /* number of bits in a byte */
|
|
typedef __int32_t __fd_mask;
|
|
|
|
/* bits per mask */
|
|
#define __NFDBITS ((unsigned int)sizeof(__fd_mask) * __NBBY)
|
|
|
|
#define __howmany(x, y) (((x) + ((y) - 1)) / (y))
|
|
|
|
/*
|
|
* 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 __MINIX_OPEN_MAX
|
|
#endif
|
|
|
|
typedef struct fd_set {
|
|
__fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)];
|
|
} fd_set;
|
|
|
|
#define FD_SET(n, p) \
|
|
((p)->fds_bits[(n)/__NFDBITS] |= (1 << ((n) % __NFDBITS)))
|
|
#define FD_CLR(n, p) \
|
|
((p)->fds_bits[(n)/__NFDBITS] &= ~(1 << ((n) % __NFDBITS)))
|
|
#define FD_ISSET(n, p) \
|
|
((p)->fds_bits[(n)/__NFDBITS] & (1 << ((n) % __NFDBITS)))
|
|
#if __GNUC_PREREQ__(2, 95)
|
|
#define FD_ZERO(p) (void)__builtin_memset((p), 0, sizeof(*(p)))
|
|
#else
|
|
#define FD_ZERO(p) do { \
|
|
fd_set *__fds = (p); \
|
|
unsigned int __i; \
|
|
for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \
|
|
__fds->fds_bits[__i] = 0; \
|
|
} while (/* CONSTCOND */ 0)
|
|
#endif /* GCC 2.95 */
|
|
|
|
/*
|
|
* Expose our internals if we are not required to hide them.
|
|
*/
|
|
#if defined(_NETBSD_SOURCE)
|
|
|
|
#define fd_mask __fd_mask
|
|
#define NFDBITS __NFDBITS
|
|
#ifndef howmany
|
|
#define howmany(a, b) __howmany(a, b)
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ__(2, 95)
|
|
#define FD_COPY(f, t) (void)__builtin_memcpy((t), (f), sizeof(*(f)))
|
|
#else
|
|
#define FD_COPY(f, t) do { \
|
|
fd_set *__f = (f), *__t = (t); \
|
|
unsigned int __i; \
|
|
for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \
|
|
__t->fds_bits[__i] = __f->fds_bits[__i]; \
|
|
} while (/* CONSTCOND */ 0)
|
|
#endif /* GCC 2.95 */
|
|
|
|
#endif /* _NETBSD_SOURCE */
|
|
|
|
#endif /* _SYS_FD_SET_H_ */
|