| 1 | /*␊ |
| 2 | * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 7 | * as defined in and that are subject to the Apple Public Source License␊ |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 9 | * compliance with the License. The rights granted to you under the License␊ |
| 10 | * may not be used to create, or enable the creation or redistribution of,␊ |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
| 13 | * terms of an Apple operating system software license agreement.␊ |
| 14 | * ␊ |
| 15 | * Please obtain a copy of the License at␊ |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
| 17 | * ␊ |
| 18 | * The Original Code and all software distributed under the License are␊ |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 23 | * Please see the License for the specific language governing rights and␊ |
| 24 | * limitations under the License.␊ |
| 25 | * ␊ |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
| 27 | */␊ |
| 28 | ␊ |
| 29 | #ifndef _OS_OSBYTEORDERMACHINE_H␊ |
| 30 | #define _OS_OSBYTEORDERMACHINE_H␊ |
| 31 | ␊ |
| 32 | #include <stdint.h>␊ |
| 33 | ␊ |
| 34 | #if !defined(OS_INLINE)␊ |
| 35 | # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L␊ |
| 36 | # define OS_INLINE static inline␊ |
| 37 | # elif defined(__MWERKS__) || defined(__cplusplus)␊ |
| 38 | # define OS_INLINE static inline␊ |
| 39 | # else␊ |
| 40 | # define OS_INLINE static __inline__␊ |
| 41 | # endif␊ |
| 42 | #endif␊ |
| 43 | ␊ |
| 44 | /* Generic byte swapping functions. */␊ |
| 45 | ␊ |
| 46 | OS_INLINE␊ |
| 47 | uint16_t␊ |
| 48 | _OSSwapInt16(␊ |
| 49 | uint16_t data␊ |
| 50 | )␊ |
| 51 | {␊ |
| 52 | return OSSwapConstInt16(data);␊ |
| 53 | }␊ |
| 54 | ␊ |
| 55 | OS_INLINE␊ |
| 56 | uint32_t␊ |
| 57 | _OSSwapInt32(␊ |
| 58 | uint32_t data␊ |
| 59 | )␊ |
| 60 | {␊ |
| 61 | return OSSwapConstInt32(data);␊ |
| 62 | }␊ |
| 63 | ␊ |
| 64 | OS_INLINE␊ |
| 65 | uint64_t␊ |
| 66 | _OSSwapInt64(␊ |
| 67 | uint64_t data␊ |
| 68 | )␊ |
| 69 | {␊ |
| 70 | return OSSwapConstInt64(data);␊ |
| 71 | }␊ |
| 72 | ␊ |
| 73 | /* Functions for byte reversed loads. */␊ |
| 74 | ␊ |
| 75 | OS_INLINE␊ |
| 76 | uint16_t␊ |
| 77 | OSReadSwapInt16(␊ |
| 78 | const volatile void * base,␊ |
| 79 | uintptr_t byteOffset␊ |
| 80 | )␊ |
| 81 | {␊ |
| 82 | uint16_t data = *(volatile uint16_t *)((uintptr_t)base + byteOffset);␊ |
| 83 | return _OSSwapInt16(data);␊ |
| 84 | }␊ |
| 85 | ␊ |
| 86 | OS_INLINE␊ |
| 87 | uint32_t␊ |
| 88 | OSReadSwapInt32(␊ |
| 89 | const volatile void * base,␊ |
| 90 | uintptr_t byteOffset␊ |
| 91 | )␊ |
| 92 | {␊ |
| 93 | uint32_t data = *(volatile uint32_t *)((uintptr_t)base + byteOffset);␊ |
| 94 | return _OSSwapInt32(data);␊ |
| 95 | }␊ |
| 96 | ␊ |
| 97 | OS_INLINE␊ |
| 98 | uint64_t␊ |
| 99 | OSReadSwapInt64(␊ |
| 100 | const volatile void * base,␊ |
| 101 | uintptr_t byteOffset␊ |
| 102 | )␊ |
| 103 | {␊ |
| 104 | uint64_t data = *(volatile uint64_t *)((uintptr_t)base + byteOffset);␊ |
| 105 | return _OSSwapInt64(data);␊ |
| 106 | }␊ |
| 107 | ␊ |
| 108 | /* Functions for byte reversed stores. */␊ |
| 109 | ␊ |
| 110 | OS_INLINE␊ |
| 111 | void␊ |
| 112 | OSWriteSwapInt16(␊ |
| 113 | volatile void * base,␊ |
| 114 | uintptr_t byteOffset,␊ |
| 115 | uint16_t data␊ |
| 116 | )␊ |
| 117 | {␊ |
| 118 | *(volatile uint16_t *)((uintptr_t)base + byteOffset) = _OSSwapInt16(data);␊ |
| 119 | }␊ |
| 120 | ␊ |
| 121 | OS_INLINE␊ |
| 122 | void␊ |
| 123 | OSWriteSwapInt32(␊ |
| 124 | volatile void * base,␊ |
| 125 | uintptr_t byteOffset,␊ |
| 126 | uint32_t data␊ |
| 127 | )␊ |
| 128 | {␊ |
| 129 | *(volatile uint32_t *)((uintptr_t)base + byteOffset) = _OSSwapInt32(data);␊ |
| 130 | }␊ |
| 131 | ␊ |
| 132 | OS_INLINE␊ |
| 133 | void␊ |
| 134 | OSWriteSwapInt64(␊ |
| 135 | volatile void * base,␊ |
| 136 | uintptr_t byteOffset,␊ |
| 137 | uint64_t data␊ |
| 138 | )␊ |
| 139 | {␊ |
| 140 | *(volatile uint64_t *)((uintptr_t)base + byteOffset) = _OSSwapInt64(data);␊ |
| 141 | }␊ |
| 142 | ␊ |
| 143 | #endif /* ! _OS_OSBYTEORDERMACHINE_H */␊ |
| 144 | |
