95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */
|
|
|
|
/* Written 2000 by Werner Almesberger */
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Berkeley Software Design, Inc.
|
|
*
|
|
* 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.
|
|
* 4. 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.
|
|
*
|
|
* @(#)cdefs.h 8.8 (Berkeley) 1/9/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_DEFS_H_
|
|
#define _SYS_DEFS_H_
|
|
|
|
#include "types.h"
|
|
#include "compiler.h"
|
|
|
|
#ifndef __DEQUALIFY
|
|
#define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
|
|
#endif
|
|
|
|
#ifndef offsetof
|
|
#define offsetof(type, field) \
|
|
((size_t)(uintptr_t)((const volatile void *)&((type *)0)->field))
|
|
#endif
|
|
|
|
#ifndef __offsetof
|
|
#define __offsetof(type, field) offsetof(type, field)
|
|
#endif
|
|
|
|
#ifndef __containerof
|
|
#define __containerof(ptr, type, field) \
|
|
__DEQUALIFY(type *, (const volatile char *)(ptr) - offsetof(type, field))
|
|
#endif
|
|
|
|
#ifndef container_of
|
|
#define container_of(ptr, type, field) __containerof(ptr, type, field)
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Definitions for byte order, according to byte significance from low
|
|
* address to high.
|
|
*/
|
|
#ifndef _LITTLE_ENDIAN
|
|
#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
|
|
#endif
|
|
#ifndef _BIG_ENDIAN
|
|
#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
|
|
#endif
|
|
|
|
#ifndef LITTLE_ENDIAN
|
|
#define LITTLE_ENDIAN _LITTLE_ENDIAN
|
|
#endif
|
|
#ifndef BIG_ENDIAN
|
|
#define BIG_ENDIAN _BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifndef _BYTE_ORDER
|
|
#define _BYTE_ORDER _LITTLE_ENDIAN
|
|
#endif
|
|
#ifndef BYTE_ORDER
|
|
#define BYTE_ORDER _BYTE_ORDER
|
|
#endif
|
|
|
|
#endif /* _SYS_DEFS_H_ */
|