1/* 2 * Copyright (c) 2007-2008 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#ifdef XNU_KERNEL_PRIVATE 30 31#ifndef _KERN_AFFINITY_H_ 32#define _KERN_AFFINITY_H_ 33 34#ifdef MACH_KERNEL_PRIVATE 35 36#include <kern/queue.h> 37#include <kern/processor.h> 38#include <kern/lock.h> 39 40/* 41 * An affinity set object represents a set of threads identified by the user 42 * to be sharing (cache) affinity. A task may have multiple affinity sets 43 * defined. Each set has dis-affinity other sets. Tasks related by inheritance 44 * may share the same affinity set namespace. 45 * Affinity sets are used to advise (hint) thread placement. 46 */ 47struct affinity_set { 48 struct affinity_space *aset_space; /* namespace */ 49 queue_chain_t aset_affinities; /* links affinities in group */ 50 queue_head_t aset_threads; /* threads in affinity set */ 51 uint32_t aset_thread_count; /* num threads in set */ 52 uint32_t aset_tag; /* user-assigned tag */ 53 uint32_t aset_num; /* kernel-assigned affinity */ 54 processor_set_t aset_pset; /* processor set */ 55}; 56 57extern boolean_t thread_affinity_is_supported(void); 58extern void thread_affinity_dup(thread_t parent, thread_t child); 59extern void thread_affinity_terminate(thread_t thread); 60extern void task_affinity_create( 61 task_t, 62 task_t); 63extern void task_affinity_deallocate( 64 task_t); 65extern kern_return_t task_affinity_info( 66 task_t, 67 task_info_t, 68 mach_msg_type_number_t *); 69 70#endif /* MACH_KERNEL_PRIVATE */ 71 72extern kern_return_t thread_affinity_set(thread_t thread, uint32_t tag); 73extern uint32_t thread_affinity_get(thread_t thread); 74extern void thread_affinity_exec(thread_t thread); 75 76#endif /* _KERN_AFFINITY_H_ */ 77 78#endif /* XNU_KERNEL_PRIVATE */ 79