libobjc/thr-rtems.c

   1 /* GNU Objective C Runtime Thread Implementation
   2    Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   3    Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
   4    Renamed from thr-vxworks.c to thr-rtems.c by
   5      Ralf Corsepius (corsepiu@faw.uni-ulm.de)
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify it under the
  10 terms of the GNU General Public License as published by the Free Software
  11 Foundation; either version 2, or (at your option) any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  15 FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  16 details.
  17
  18 You should have received a copy of the GNU General Public License along with
  19 GNU CC; see the file COPYING.  If not, write to the Free Software
  20 Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* As a special exception, if you link this library with files compiled with
  24    GCC to produce an executable, this does not cause the resulting executable
  25    to be covered by the GNU General Public License. This exception does not
  26    however invalidate any other reasons why the executable file might be
  27    covered by the GNU General Public License.  */
  28
  29 #include <objc/thr.h>
  30 #include "runtime.h"
  31
  32 /* Thread local storage for a single thread */
  33 static void *thread_local_storage = NULL;
  34
  35 /* Backend initialization functions */
  36
  37 /* Initialize the threads subsystem. */
  38 int
  39 __objc_init_thread_system(void)
  40 {
  41   /* No thread support available */
  42   return -1;
  43 }
  44
  45 /* Close the threads subsystem. */
  46 int
  47 __objc_close_thread_system(void)
  48 {
  49   /* No thread support available */
  50   return -1;
  51 }
  52
  53 /* Backend thread functions */
  54
  55 /* Create a new thread of execution. */
  56 objc_thread_t
  57 __objc_thread_detach(void (*func)(void *arg), void *arg)
  58 {
  59   /* No thread support available */
  60   return NULL;
  61 }
  62
  63 /* Set the current thread's priority. */
  64 int
  65 __objc_thread_set_priority(int priority)
  66 {
  67   /* No thread support available */
  68   return -1;
  69 }
  70
  71 /* Return the current thread's priority. */
  72 int
  73 __objc_thread_get_priority(void)
  74 {
  75   return OBJC_THREAD_INTERACTIVE_PRIORITY;
  76 }
  77
  78 /* Yield our process time to another thread. */
  79 void
  80 __objc_thread_yield(void)
  81 {
  82   return;
  83 }
  84
  85 /* Terminate the current thread. */
  86 int
  87 __objc_thread_exit(void)
  88 {
  89   /* No thread support available */
  90   /* Should we really exit the program */
  91   /* exit(&__objc_thread_exit_status); */
  92   return -1;
  93 }
  94
  95 /* Returns an integer value which uniquely describes a thread. */
  96 objc_thread_t
  97 __objc_thread_id(void)
  98 {
  99   /* No thread support, use 1. */
 100   return (objc_thread_t)1;
 101 }
 102
 103 /* Sets the thread's local storage pointer. */
 104 int
 105 __objc_thread_set_data(void *value)
 106 {
 107   thread_local_storage = value;
 108   return 0;
 109 }
 110
 111 /* Returns the thread's local storage pointer. */
 112 void *
 113 __objc_thread_get_data(void)
 114 {
 115   return thread_local_storage;
 116 }
 117
 118 /* Backend mutex functions */
 119
 120 /* Allocate a mutex. */
 121 int
 122 __objc_mutex_allocate(objc_mutex_t mutex)
 123 {
 124   return 0;
 125 }
 126
 127 /* Deallocate a mutex. */
 128 int
 129 __objc_mutex_deallocate(objc_mutex_t mutex)
 130 {
 131   return 0;
 132 }
 133
 134 /* Grab a lock on a mutex. */
 135 int
 136 __objc_mutex_lock(objc_mutex_t mutex)
 137 {
 138   /* There can only be one thread, so we always get the lock */
 139   return 0;
 140 }
 141
 142 /* Try to grab a lock on a mutex. */
 143 int
 144 __objc_mutex_trylock(objc_mutex_t mutex)
 145 {
 146   /* There can only be one thread, so we always get the lock */
 147   return 0;
 148 }
 149
 150 /* Unlock the mutex */
 151 int
 152 __objc_mutex_unlock(objc_mutex_t mutex)
 153 {
 154   return 0;
 155 }
 156
 157 /* Backend condition mutex functions */
 158
 159 /* Allocate a condition. */
 160 int
 161 __objc_condition_allocate(objc_condition_t condition)
 162 {
 163   return 0;
 164 }
 165
 166 /* Deallocate a condition. */
 167 int
 168 __objc_condition_deallocate(objc_condition_t condition)
 169 {
 170   return 0;
 171 }
 172
 173 /* Wait on the condition */
 174 int
 175 __objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
 176 {
 177   return 0;
 178 }
 179
 180 /* Wake up all threads waiting on this condition. */
 181 int
 182 __objc_condition_broadcast(objc_condition_t condition)
 183 {
 184   return 0;
 185 }
 186
 187 /* Wake up one thread waiting on this condition. */
 188 int
 189 __objc_condition_signal(objc_condition_t condition)
 190 {
 191   return 0;
 192 }
 193
 194 /* End of File */