projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * The contents of this file constitute Original Code as defined in and | |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 11 | * | |
| 12 | * This Original Code and all software distributed under the License are | |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the | |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 19 | * | |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * Mach Operating System | |
| 24 | * Copyright (c) 1989 Carnegie-Mellon University | |
| 25 | * Copyright (c) 1988 Carnegie-Mellon University | |
| 26 | * Copyright (c) 1987 Carnegie-Mellon University | |
| 27 | * All rights reserved. The CMU software License Agreement specifies | |
| 28 | * the terms and conditions for use and redistribution. | |
| 29 | */ | |
| 30 | /* | |
| 31 | * HISTORY | |
| 32 | * | |
| 33 | * Revision 1.1.1.1 1998/09/22 21:06:13 wsanchez | |
| 34 | * Import of Mac OS X kernel (~semeria) | |
| 35 | * | |
| 36 | * Revision 1.1.1.1 1997/09/30 02:44:39 wsanchez | |
| 37 | * Import of kernel from umeshv/kernel | |
| 38 | * | |
| 39 | * Revision 2.4 89/12/22 15:52:48 rpd | |
| 40 | * MACH_HOST support: when releasing master, context switch away | |
| 41 | * immediately if thread is not assigned to default processor set. | |
| 42 | * [89/11/16 dlb] | |
| 43 | * | |
| 44 | * Revision 2.3 89/10/11 14:19:20 dlb | |
| 45 | * Processor logic - explicitly record bound processor in thread | |
| 46 | * instead of changing whichq pointer. | |
| 47 | * [88/09/30 dlb] | |
| 48 | * | |
| 49 | * Revision 2.2 89/02/25 18:07:24 gm0w | |
| 50 | * Changes for cleanup. | |
| 51 | * | |
| 52 | * 15-Oct-87 David Golub (dbg) at Carnegie-Mellon University | |
| 53 | * Use thread_bind (inline version) to bind thread to master cpu | |
| 54 | * while holding unix-lock. | |
| 55 | * | |
| 56 | * 9-Oct-87 Robert Baron (rvb) at Carnegie-Mellon University | |
| 57 | * Define unix_reset for longjmp/setjmp reset. | |
| 58 | * | |
| 59 | * 25-Sep-87 Robert Baron (rvb) at Carnegie-Mellon University | |
| 60 | * Clean out some debugging code. | |
| 61 | * | |
| 62 | * 21-Sep-87 Robert Baron (rvb) at Carnegie-Mellon University | |
| 63 | * Created. | |
| 64 | * | |
| 65 | */ | |
| 66 | ||
| 67 | ||
| 68 | #include <cpus.h> | |
| 69 | #include <mach_host.h> | |
| 70 | ||
| 71 | #if NCPUS > 1 | |
| 72 | ||
| 73 | #include <kern/processor.h> | |
| 74 | #include <kern/thread.h> | |
| 75 | #include <kern/sched_prim.h> | |
| 76 | #include <kern/parallel.h> | |
| 77 | ||
| 78 | void unix_master() | |
| 79 | { | |
| 80 | register thread_t t = current_thread(); | |
| 81 | ||
| 82 | if (! (++( t->unix_lock ))) { | |
| 83 | ||
| 84 | /* thread_bind(t, master_processor); */ | |
| 85 | t->bound_processor = master_processor; | |
| 86 | ||
| 87 | if (cpu_number() != master_cpu) { | |
| 88 | t->interruptible = FALSE; | |
| 89 | thread_block(0); | |
| 90 | } | |
| 91 | } | |
| 92 | } | |
| 93 | ||
| 94 | void unix_release() | |
| 95 | { | |
| 96 | register thread_t t = current_thread(); | |
| 97 | ||
| 98 | t->unix_lock--; | |
| 99 | if (t->unix_lock < 0) { | |
| 100 | /* thread_bind(t, PROCESSOR_NULL); */ | |
| 101 | t->bound_processor = PROCESSOR_NULL; | |
| 102 | #if MACH_HOST | |
| 103 | if (t->processor_set != &default_pset) | |
| 104 | thread_block(0); | |
| 105 | #endif MACH_HOST | |
| 106 | } | |
| 107 | } | |
| 108 | ||
| 109 | void unix_reset() | |
| 110 | { | |
| 111 | register thread_t t = current_thread(); | |
| 112 | ||
| 113 | if (t->unix_lock != -1) | |
| 114 | t->unix_lock = 0; | |
| 115 | } | |
| 116 | ||
| 117 | #endif NCPUS > 1 |