2aa62f2bc9
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc. AppPkg contains applications that make use of the standard libraries defined in the StdLib Package. StdLib contains header (include) files and the implementations of the standard libraries. StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/* $NetBSD: fd_set.h,v 1.2 2005/12/11 12:25:20 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)types.h 8.4 (Berkeley) 1/21/94
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*/
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#ifndef _SYS_FD_SET_H_
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#define _SYS_FD_SET_H_
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#include <sys/EfiCdefs.h>
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#include <machine/int_types.h>
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/*
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* Implementation dependent defines, hidden from user space. X/Open does not
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* specify them.
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*/
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#define __NBBY 8 /* number of bits in a byte */
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typedef __int32_t __fd_mask;
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/* bits per mask */
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#define __NFDBITS ((unsigned int)sizeof(__fd_mask) * __NBBY)
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#define __howmany(x, y) (((x) + ((y) - 1)) / (y))
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/*
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* Select uses bit masks of file descriptors in longs. These macros
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* manipulate such bit fields (the filesystem macros use chars).
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* FD_SETSIZE may be defined by the user, but the default here should
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* be enough for most uses.
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*/
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#ifndef FD_SETSIZE
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#define FD_SETSIZE 256
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#endif
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typedef struct fd_set {
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__fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)];
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} fd_set;
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#define FD_SET(n, p) \
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((p)->fds_bits[(n)/__NFDBITS] |= (1 << ((n) % __NFDBITS)))
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#define FD_CLR(n, p) \
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((p)->fds_bits[(n)/__NFDBITS] &= ~(1 << ((n) % __NFDBITS)))
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#define FD_ISSET(n, p) \
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((p)->fds_bits[(n)/__NFDBITS] & (1 << ((n) % __NFDBITS)))
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#if __GNUC_PREREQ__(2, 95)
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#define FD_ZERO(p) (void)__builtin_memset((p), 0, sizeof(*(p)))
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#else
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#define FD_ZERO(p) do { \
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fd_set *__fds = (p); \
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unsigned int __i; \
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for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \
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__fds->fds_bits[__i] = 0; \
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} while (/* CONSTCOND */ 0)
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#endif /* GCC 2.95 */
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/*
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* Expose our internals if we are not required to hide them.
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*/
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#if defined(_NETBSD_SOURCE)
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#define fd_mask __fd_mask
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#define NFDBITS __NFDBITS
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#ifndef howmany
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#define howmany(a, b) __howmany(a, b)
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#endif
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#if __GNUC_PREREQ__(2, 95)
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#define FD_COPY(f, t) (void)__builtin_memcpy((t), (f), sizeof(*(f)))
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#else
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#define FD_COPY(f, t) do { \
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fd_set *__f = (f), *__t = (t); \
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unsigned int __i; \
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for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \
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__t->fds_bits[__i] = __f->fds_bits[__i]; \
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} while (/* CONSTCOND */ 0)
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#endif /* GCC 2.95 */
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#endif /* _NETBSD_SOURCE */
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#endif /* _SYS_FD_SET_H_ */
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