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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) | |
6 | ||
38709cad | 7 | This file is part of GCC. |
68c9c61a | 8 | |
38709cad | 9 | GCC is free software; you can redistribute it and/or modify it under the |
68c9c61a RC |
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 | ||
38709cad | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
68c9c61a RC |
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 | |
38709cad | 19 | GCC; see the file COPYING. If not, write to the Free Software |
68c9c61a RC |
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 */ |