1/* 2 * Copyright (c) 2007 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#ifndef _KERN_CPU_AFFINITY_H_ 29#define _KERN_CPU_AFFINITY_H_ 30 31#include <kern/queue.h> 32#include <kern/processor.h> 33#include <kern/lock.h> 34 35/* 36 * An affinity set object represents a set of threads identified by the user 37 * to be sharing (cache) affinity. A task may have multiple affinity sets 38 * defined. Each set has dis-affinity other sets. Tasks related by inheritance 39 * may share the same affinity set namespace. 40 * Affinity sets are used to advise (hint) thread placement. 41 */ 42struct affinity_set { 43 struct affinity_space *aset_space; /* namespace */ 44 queue_chain_t aset_affinities; /* links affinities in group */ 45 queue_head_t aset_threads; /* threads in affinity set */ 46 uint32_t aset_thread_count; /* num threads in set */ 47 uint32_t aset_tag; /* user-assigned tag */ 48 uint32_t aset_num; /* kernel-assigned affinity */ 49 processor_set_t aset_pset; /* processor set */ 50}; 51 52extern boolean_t thread_affinity_is_supported(void); 53extern kern_return_t thread_affinity_set(thread_t thread, uint32_t tag); 54extern uint32_t thread_affinity_get(thread_t thread); 55extern void thread_affinity_dup(thread_t parent, thread_t child); 56extern void thread_affinity_terminate(thread_t thread); 57extern void task_affinity_create( 58 task_t, 59 task_t); 60extern void task_affinity_deallocate( 61 task_t); 62extern kern_return_t task_affinity_info( 63 task_t, 64 task_info_t, 65 mach_msg_type_number_t *); 66 67#endif /* _KERN_CPU_AFFINITY_H_ */ 68