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Annotation of kernel/kern/parallel.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
                      7:  * Reserved.  This file contains Original Code and/or Modifications of
                      8:  * Original Code as defined in and that are subject to the Apple Public
                      9:  * Source License Version 1.1 (the "License").  You may not use this file
                     10:  * except in compliance with the License.  Please obtain a copy of the
                     11:  * License at http://www.apple.com/publicsource and read it before using
                     12:  * this file.
                     13:  * 
                     14:  * The Original Code and all software distributed under the License are
                     15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     19:  * License for the specific language governing rights and limitations
                     20:  * under the License.
                     21:  * 
                     22:  * @APPLE_LICENSE_HEADER_END@
                     23:  */
                     24: 
                     25: /* 
                     26:  * Mach Operating System
                     27:  * Copyright (c) 1989 Carnegie-Mellon University
                     28:  * Copyright (c) 1988 Carnegie-Mellon University
                     29:  * Copyright (c) 1987 Carnegie-Mellon University
                     30:  * All rights reserved.  The CMU software License Agreement specifies
                     31:  * the terms and conditions for use and redistribution.
                     32:  */
                     33: 
                     34: 
                     35: #import <cpus.h>
                     36: #import <mach_host.h>
                     37: 
                     38: #if    NCPUS > 1
                     39: 
                     40: #import <kern/processor.h>
                     41: #import <kern/thread.h>
                     42: #import <kern/sched_prim.h>
                     43: #import <kern/parallel.h>
                     44: 
                     45: void unix_master()
                     46: {
                     47:        register thread_t t = current_thread();
                     48:        
                     49:        if (! (++( t->unix_lock )))     {
                     50: 
                     51:                /* thread_bind(t, master_processor); */
                     52:                t->bound_processor = master_processor;
                     53: 
                     54:                if (cpu_number() != master_cpu) {
                     55:                        t->interruptible = FALSE;
                     56:                        thread_block();
                     57:                }
                     58:        }
                     59: }
                     60: 
                     61: void unix_release()
                     62: {
                     63:        register thread_t t = current_thread();
                     64: 
                     65:        t->unix_lock--;
                     66:        if (t->unix_lock < 0) {
                     67:                /* thread_bind(t, PROCESSOR_NULL); */
                     68:                t->bound_processor = PROCESSOR_NULL;
                     69: #if    MACH_HOST
                     70:                if (t->processor_set != &default_pset)
                     71:                        thread_block();
                     72: #endif MACH_HOST
                     73:        }
                     74: }
                     75: 
                     76: void unix_reset()
                     77: {
                     78:        register thread_t       t = current_thread();
                     79: 
                     80:        if (t->unix_lock != -1)
                     81:                t->unix_lock = 0;
                     82: }
                     83: 
                     84: #endif NCPUS > 1

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