mach/mach_init_ports.c

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28
  29 /*
  30  * Mach Operating System
  31  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  32  * All Rights Reserved.
  33  *
  34  * Permission to use, copy, modify and distribute this software and its
  35  * documentation is hereby granted, provided that both the copyright
  36  * notice and this permission notice appear in all copies of the
  37  * software, derivative works or modified versions, and any portions
  38  * thereof, and that both notices appear in supporting documentation.
  39  *
  40  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  41  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  42  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  43  *
  44  * Carnegie Mellon requests users of this software to return to
  45  *
  46  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  47  *  School of Computer Science
  48  *  Carnegie Mellon University
  49  *  Pittsburgh PA 15213-3890
  50  *
  51  * any improvements or extensions that they make and grant Carnegie Mellon
  52  * the rights to redistribute these changes.
  53  */
  54
  55 #include <mach/mach.h>
  56 #include <stdlib.h>
  57 #include "externs.h"
  58
  59 mach_port_t     bootstrap_port = MACH_PORT_NULL;
  60 mach_port_t     name_server_port = MACH_PORT_NULL;
  61 mach_port_t     environment_port = MACH_PORT_NULL;
  62 mach_port_t     service_port = MACH_PORT_NULL;
  63 mach_port_t     clock_port = MACH_PORT_NULL;
  64 mach_port_t thread_recycle_port = MACH_PORT_NULL;
  65
  66 void
  67 mach_init_ports(void)
  68 {
  69         mach_port_array_t       ports;
  70         mach_msg_type_number_t  ports_count;
  71         kern_return_t           kr;
  72         host_t                  host;
  73
  74         /*
  75          *      Find those ports important to every task.
  76          */
  77         kr = task_get_special_port(mach_task_self(),
  78                                    TASK_BOOTSTRAP_PORT,
  79                                    &bootstrap_port);
  80         if (kr != KERN_SUCCESS)
  81             return;
  82
  83         kr = mach_ports_lookup(mach_task_self(), &ports,
  84                                &ports_count);
  85         if ((kr != KERN_SUCCESS) ||
  86             (ports_count < MACH_PORTS_SLOTS_USED))
  87             return;
  88
  89         name_server_port = ports[NAME_SERVER_SLOT];
  90         environment_port = ports[ENVIRONMENT_SLOT];
  91         service_port     = ports[SERVICE_SLOT];
  92
  93         /* get rid of out-of-line data so brk has a chance of working */
  94
  95         (void) vm_deallocate(mach_task_self(),
  96                              (vm_offset_t) ports,
  97                              (vm_size_t) (ports_count * sizeof *ports));
  98
  99         /* Get the clock service port for nanosleep */
 100         host = mach_host_self();
 101         kr = host_get_clock_service(host, SYSTEM_CLOCK, &clock_port);
 102         if (kr != KERN_SUCCESS) {
 103             abort();
 104         }
 105         mach_port_deallocate(mach_task_self(), host);
 106         kr = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &thread_recycle_port);
 107         if (kr != KERN_SUCCESS) {
 108             abort();
 109         }
 110 }
 111
 112 #ifdef notdef
 113 /* will have problems with dylib build --> not needed anyway */
 114 #ifndef lint
 115 /*
 116  *      Routines which our library must suck in, to avoid
 117  *      a later library from referencing them and getting
 118  *      the wrong version.
 119  */
 120 extern void _replacements(void);
 121
 122 void
 123 _replacements(void)
 124 {
 125         (void)sbrk(0);                  /* Pull in our sbrk/brk */
 126         (void)malloc(0);                /* Pull in our malloc package */
 127 }
 128 #endif  /* lint */
 129 #endif /* notdef */