| | 1 | /* |
| | 2 | * Copyright (c) 2011 Apple 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 _NET_FLOWHASH_H_ |
| | 30 | #define _NET_FLOWHASH_H_ |
| | 31 | |
| | 32 | #include <sys/types.h> |
| | 33 | |
| | 34 | #ifdef __cplusplus |
| | 35 | extern "C" { |
| | 36 | #endif |
| | 37 | |
| | 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) |
| | 43 | |
| | 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); |
| | 49 | |
| | 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; |
| | 54 | #ifdef __cplusplus |
| | 55 | } |
| | 56 | #endif |
| | 57 | |
| | 58 | #endif /* _NET_FLOWHASH_H_ */ |
projects / apple / xnu.git / blame_incremental