/* * Copyright (c) 2011 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #ifndef _NET_FLOWHASH_H_ #define _NET_FLOWHASH_H_ #include <sys/types.h> #ifdef __cplusplus extern "C" { #endif /* * If 32-bit hash value is too large, use this macro to truncate * it to n-bit; masking is a faster operation than modulus. */ #define HASHMASK(n) ((1UL << (n)) - 1) /* * Returns 32-bit hash value. Hashes which are capable of returning * more bits currently have their results truncated to 32-bit. */ typedef u_int32_t net_flowhash_fn_t(const void *, u_int32_t, const u_int32_t); extern net_flowhash_fn_t *net_flowhash; extern net_flowhash_fn_t net_flowhash_mh3_x86_32; extern net_flowhash_fn_t net_flowhash_mh3_x64_128; extern net_flowhash_fn_t net_flowhash_jhash; #ifdef __cplusplus } #endif #endif /* _NET_FLOWHASH_H_ */