projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b | 1 | /* |
| 316670eb | 2 | * Copyright (c) 2011 Apple Inc. All rights reserved. |
| 5d5c5d0d | 3 | * |
| 2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| b0d623f7 | 5 | * |
| 2d21ac55 A |
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. | |
| b0d623f7 | 14 | * |
| 2d21ac55 A |
15 | * Please obtain a copy of the License at |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| b0d623f7 | 17 | * |
| 2d21ac55 A |
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 | |
| 8f6c56a5 A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 2d21ac55 A |
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. | |
| b0d623f7 | 25 | * |
| 2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 1c79356b | 27 | */ |
| 1c79356b | 28 | |
| 316670eb A |
29 | #ifndef _NET_FLOWHASH_H_ |
| 30 | #define _NET_FLOWHASH_H_ | |
| 1c79356b | 31 | |
| 316670eb | 32 | #include <sys/types.h> |
| 1c79356b | 33 | |
| b0d623f7 A |
34 | #ifdef __cplusplus |
| 35 | extern "C" { | |
| 36 | #endif | |
| 1c79356b | 37 | |
| 316670eb A |
38 | /* |
| 39 | * If 32-bit hash value is too large, use this macro to truncate | |
| 40 | * it to n-bit; masking is a faster operation than modulus. | |
| 41 | */ | |
| 42 | #define HASHMASK(n) ((1UL << (n)) - 1) | |
| 1c79356b | 43 | |
| 316670eb A |
44 | /* |
| 45 | * Returns 32-bit hash value. Hashes which are capable of returning | |
| 46 | * more bits currently have their results truncated to 32-bit. | |
| 47 | */ | |
| 48 | typedef u_int32_t net_flowhash_fn_t(const void *, u_int32_t, const u_int32_t); | |
| 1c79356b | 49 | |
| 316670eb A |
50 | extern net_flowhash_fn_t *net_flowhash; |
| 51 | extern net_flowhash_fn_t net_flowhash_mh3_x86_32; | |
| 52 | extern net_flowhash_fn_t net_flowhash_mh3_x64_128; | |
| 53 | extern net_flowhash_fn_t net_flowhash_jhash; | |
| b0d623f7 A |
54 | #ifdef __cplusplus |
| 55 | } | |
| 1c79356b | 56 | #endif |
| 316670eb A |
57 | |
| 58 | #endif /* _NET_FLOWHASH_H_ */ |