libsyscall/mach/mach_init_ports.c

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, 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 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31
  32 /*
  33  * Mach Operating System
  34  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  35  * All Rights Reserved.
  36  *
  37  * Permission to use, copy, modify and distribute this software and its
  38  * documentation is hereby granted, provided that both the copyright
  39  * notice and this permission notice appear in all copies of the
  40  * software, derivative works or modified versions, and any portions
  41  * thereof, and that both notices appear in supporting documentation.
  42  *
  43  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  44  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  45  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  46  *
  47  * Carnegie Mellon requests users of this software to return to
  48  *
  49  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  50  *  School of Computer Science
  51  *  Carnegie Mellon University
  52  *  Pittsburgh PA 15213-3890
  53  *
  54  * any improvements or extensions that they make and grant Carnegie Mellon
  55  * the rights to redistribute these changes.
  56  */
  57
  58 #include <mach/mach.h>
  59 #include <stdlib.h>
  60 #include "externs.h"
  61
  62 mach_port_t     bootstrap_port = MACH_PORT_NULL;
  63 mach_port_t     name_server_port = MACH_PORT_NULL;
  64 mach_port_t     environment_port = MACH_PORT_NULL;
  65 mach_port_t     service_port = MACH_PORT_NULL;
  66 semaphore_t     clock_sem = MACH_PORT_NULL;
  67 mach_port_t     clock_port = MACH_PORT_NULL;
  68 mach_port_t thread_recycle_port = MACH_PORT_NULL;
  69
  70 void
  71 mach_init_ports(void)
  72 {
  73         mach_port_array_t       ports;
  74         mach_msg_type_number_t  ports_count;
  75         kern_return_t           kr;
  76         host_t                  host;
  77
  78         /*
  79          *      Find those ports important to every task.
  80          */
  81         kr = task_get_special_port(mach_task_self(),
  82                                    TASK_BOOTSTRAP_PORT,
  83                                    &bootstrap_port);
  84         if (kr != KERN_SUCCESS)
  85             return;
  86
  87         /* Get the clock service port for nanosleep */
  88         host = mach_host_self();
  89         kr = host_get_clock_service(host, SYSTEM_CLOCK, &clock_port);
  90         if (kr != KERN_SUCCESS) {
  91             abort();
  92         }
  93         kr = semaphore_create(mach_task_self(), &clock_sem, SYNC_POLICY_FIFO, 0);
  94         if (kr != KERN_SUCCESS) {
  95             abort();
  96         }
  97         mach_port_deallocate(mach_task_self(), host);
  98         kr = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &thread_recycle_port);
  99         if (kr != KERN_SUCCESS) {
 100             abort();
 101         }
 102
 103         /*
 104          *      Find the options service ports.
 105          *      XXX - Don't need these on Darwin, should go away.
 106          */
 107         kr = mach_ports_lookup(mach_task_self(), &ports,
 108                                &ports_count);
 109         if (kr == KERN_SUCCESS) {
 110                 if (ports_count >= MACH_PORTS_SLOTS_USED) {
 111                         name_server_port = ports[NAME_SERVER_SLOT];
 112                         environment_port = ports[ENVIRONMENT_SLOT];
 113                         service_port     = ports[SERVICE_SLOT];
 114                 }
 115
 116                 /* get rid of out-of-line data */
 117                 (void) vm_deallocate(mach_task_self(),
 118                              (vm_offset_t) ports,
 119                              (vm_size_t) (ports_count * sizeof *ports));
 120         }
 121 }
 122
 123 #ifdef notdef
 124 /* will have problems with dylib build --> not needed anyway */
 125 #ifndef lint
 126 /*
 127  *      Routines which our library must suck in, to avoid
 128  *      a later library from referencing them and getting
 129  *      the wrong version.
 130  */
 131 extern void _replacements(void);
 132
 133 void
 134 _replacements(void)
 135 {
 136         (void)sbrk(0);                  /* Pull in our sbrk/brk */
 137         (void)malloc(0);                /* Pull in our malloc package */
 138 }
 139 #endif  /* lint */
 140 #endif /* notdef */