mach.subproj/mach_init_ports.c

   1 /*
   2  * @OSF_COPYRIGHT@
   3  */
   4
   5 /*
   6  * Mach Operating System
   7  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
   8  * All Rights Reserved.
   9  *
  10  * Permission to use, copy, modify and distribute this software and its
  11  * documentation is hereby granted, provided that both the copyright
  12  * notice and this permission notice appear in all copies of the
  13  * software, derivative works or modified versions, and any portions
  14  * thereof, and that both notices appear in supporting documentation.
  15  *
  16  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  17  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  18  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  19  *
  20  * Carnegie Mellon requests users of this software to return to
  21  *
  22  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  23  *  School of Computer Science
  24  *  Carnegie Mellon University
  25  *  Pittsburgh PA 15213-3890
  26  *
  27  * any improvements or extensions that they make and grant Carnegie Mellon
  28  * the rights to redistribute these changes.
  29  */
  30
  31 #include <mach/mach.h>
  32 #include "externs.h"
  33
  34 mach_port_t     bootstrap_port = MACH_PORT_NULL;
  35 mach_port_t     name_server_port = MACH_PORT_NULL;
  36 mach_port_t     environment_port = MACH_PORT_NULL;
  37 mach_port_t     service_port = MACH_PORT_NULL;
  38 mach_port_t     clock_port = MACH_PORT_NULL;
  39 mach_port_t thread_recycle_port = MACH_PORT_NULL;
  40
  41 void
  42 mach_init_ports(void)
  43 {
  44         mach_port_array_t       ports;
  45         mach_msg_type_number_t  ports_count;
  46         kern_return_t           kr;
  47
  48         /*
  49          *      Find those ports important to every task.
  50          */
  51         kr = task_get_special_port(mach_task_self(),
  52                                    TASK_BOOTSTRAP_PORT,
  53                                    &bootstrap_port);
  54         if (kr != KERN_SUCCESS)
  55             return;
  56
  57         kr = mach_ports_lookup(mach_task_self(), &ports,
  58                                &ports_count);
  59         if ((kr != KERN_SUCCESS) ||
  60             (ports_count < MACH_PORTS_SLOTS_USED))
  61             return;
  62
  63         name_server_port = ports[NAME_SERVER_SLOT];
  64         environment_port = ports[ENVIRONMENT_SLOT];
  65         service_port     = ports[SERVICE_SLOT];
  66
  67         /* get rid of out-of-line data so brk has a chance of working */
  68
  69         (void) vm_deallocate(mach_task_self(),
  70                              (vm_offset_t) ports,
  71                              (vm_size_t) (ports_count * sizeof *ports));
  72
  73         /* Get the clock service port for nanosleep */
  74         kr = host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &clock_port);
  75         if (kr != KERN_SUCCESS) {
  76             abort();
  77         }
  78         kr = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &thread_recycle_port);
  79         if (kr != KERN_SUCCESS) {
  80             abort();
  81         }
  82         kr = mach_port_insert_right(mach_task_self(), thread_recycle_port, thread_recycle_port, MACH_MSG_TYPE_MAKE_SEND);
  83         if (kr != KERN_SUCCESS) {
  84             abort();
  85         }
  86 }
  87
  88 #ifdef notdef
  89 /* will have problems with dylib build --> not needed anyway */
  90 #ifndef lint
  91 /*
  92  *      Routines which our library must suck in, to avoid
  93  *      a later library from referencing them and getting
  94  *      the wrong version.
  95  */
  96 extern void _replacements(void);
  97
  98 void
  99 _replacements(void)
 100 {
 101         (void)sbrk(0);                  /* Pull in our sbrk/brk */
 102         (void)malloc(0);                /* Pull in our malloc package */
 103 }
 104 #endif  /* lint */
 105 #endif /* notdef */