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[official-gcc.git] / libobjc / thr-rtems.c
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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)
7 This file is part of GCC.
9 GCC 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.
13 GCC 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.
18 You should have received a copy of the GNU General Public License along with
19 GCC; see the file COPYING. If not, write to the Free Software
20 Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
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. */
29 #include "objc/thr.h"
30 #include "objc/runtime.h"
32 /* Thread local storage for a single thread */
33 static void *thread_local_storage = NULL;
35 /* Backend initialization functions */
37 /* Initialize the threads subsystem. */
38 int
39 __objc_init_thread_system(void)
41 /* No thread support available */
42 return -1;
45 /* Close the threads subsystem. */
46 int
47 __objc_close_thread_system(void)
49 /* No thread support available */
50 return -1;
53 /* Backend thread functions */
55 /* Create a new thread of execution. */
56 objc_thread_t
57 __objc_thread_detach(void (*func)(void *arg), void *arg)
59 /* No thread support available */
60 return NULL;
63 /* Set the current thread's priority. */
64 int
65 __objc_thread_set_priority(int priority)
67 /* No thread support available */
68 return -1;
71 /* Return the current thread's priority. */
72 int
73 __objc_thread_get_priority(void)
75 return OBJC_THREAD_INTERACTIVE_PRIORITY;
78 /* Yield our process time to another thread. */
79 void
80 __objc_thread_yield(void)
82 return;
85 /* Terminate the current thread. */
86 int
87 __objc_thread_exit(void)
89 /* No thread support available */
90 /* Should we really exit the program */
91 /* exit(&__objc_thread_exit_status); */
92 return -1;
95 /* Returns an integer value which uniquely describes a thread. */
96 objc_thread_t
97 __objc_thread_id(void)
99 /* No thread support, use 1. */
100 return (objc_thread_t)1;
103 /* Sets the thread's local storage pointer. */
105 __objc_thread_set_data(void *value)
107 thread_local_storage = value;
108 return 0;
111 /* Returns the thread's local storage pointer. */
112 void *
113 __objc_thread_get_data(void)
115 return thread_local_storage;
118 /* Backend mutex functions */
120 /* Allocate a mutex. */
122 __objc_mutex_allocate(objc_mutex_t mutex)
124 return 0;
127 /* Deallocate a mutex. */
129 __objc_mutex_deallocate(objc_mutex_t mutex)
131 return 0;
134 /* Grab a lock on a mutex. */
136 __objc_mutex_lock(objc_mutex_t mutex)
138 /* There can only be one thread, so we always get the lock */
139 return 0;
142 /* Try to grab a lock on a mutex. */
144 __objc_mutex_trylock(objc_mutex_t mutex)
146 /* There can only be one thread, so we always get the lock */
147 return 0;
150 /* Unlock the mutex */
152 __objc_mutex_unlock(objc_mutex_t mutex)
154 return 0;
157 /* Backend condition mutex functions */
159 /* Allocate a condition. */
161 __objc_condition_allocate(objc_condition_t condition)
163 return 0;
166 /* Deallocate a condition. */
168 __objc_condition_deallocate(objc_condition_t condition)
170 return 0;
173 /* Wait on the condition */
175 __objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
177 return 0;
180 /* Wake up all threads waiting on this condition. */
182 __objc_condition_broadcast(objc_condition_t condition)
184 return 0;
187 /* Wake up one thread waiting on this condition. */
189 __objc_condition_signal(objc_condition_t condition)
191 return 0;
194 /* End of File */