1 /* 2 * Copyright (c) 2022 FuZhou Lockzhiner Electronic Co., Ltd. All rights reserved. 3 * Copyright (c) 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Berkeley Software Design, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #ifndef _SYS_DEFS_H 36 #define _SYS_DEFS_H 37 38 #include <stddef.h> 39 #include <stdint.h> 40 41 #ifndef __DEQUALIFY 42 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var)) 43 #endif 44 45 #ifndef offsetof 46 #define offsetof(type, field) \ 47 ((size_t)(uintptr_t)((const volatile void *)&((type *)0)->field)) 48 #endif 49 50 #ifndef __offsetof 51 #define __offsetof(type, field) offsetof(type, field) 52 #endif 53 54 #ifndef __containerof 55 #define __containerof(ptr, type, field) \ 56 __DEQUALIFY(type *, (const volatile char *)(ptr) - offsetof(type, field)) 57 #endif 58 59 #ifndef container_of 60 #define container_of(ptr, type, field) __containerof(ptr, type, field) 61 #endif 62 63 /* 64 * Definitions for byte order, according to byte significance from low 65 * address to high. 66 */ 67 #ifndef _LITTLE_ENDIAN 68 #define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 69 #endif 70 #ifndef _BIG_ENDIAN 71 #define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 72 #endif 73 74 #ifndef LITTLE_ENDIAN 75 #define LITTLE_ENDIAN _LITTLE_ENDIAN 76 #endif 77 #ifndef BIG_ENDIAN 78 #define BIG_ENDIAN _BIG_ENDIAN 79 #endif 80 81 #ifndef _BYTE_ORDER 82 #define _BYTE_ORDER _LITTLE_ENDIAN 83 #endif 84 #ifndef BYTE_ORDER 85 #define BYTE_ORDER _BYTE_ORDER 86 #endif 87 88 #endif /* _SYS_DEFS_H */ 89