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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 |