1 /* Threads compatibility routines for libgcc2 and libobjc. */ 2 /* Compile this one with gcc. */ 3 /* Copyright (C) 1997-2013 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 #ifndef _GLIBCXX_GCC_GTHR_SINGLE_H 27 #define _GLIBCXX_GCC_GTHR_SINGLE_H 28 29 /* Just provide compatibility for mutex handling. */ 30 31 typedef int __gthread_key_t; 32 typedef int __gthread_once_t; 33 typedef int __gthread_mutex_t; 34 typedef int __gthread_recursive_mutex_t; 35 36 #define __GTHREAD_ONCE_INIT 0 37 #define __GTHREAD_MUTEX_INIT 0 38 #define __GTHREAD_MUTEX_INIT_FUNCTION(mx) 39 #define __GTHREAD_RECURSIVE_MUTEX_INIT 0 40 41 #define _GLIBCXX_UNUSED __attribute__((unused)) 42 43 #ifdef _LIBOBJC 44 45 /* Thread local storage for a single thread */ 46 static void *thread_local_storage = NULL; 47 48 /* Backend initialization functions */ 49 50 /* Initialize the threads subsystem. */ 51 static inline int 52 __gthread_objc_init_thread_system (void) 53 { 54 /* No thread support available */ 55 return -1; 56 } 57 58 /* Close the threads subsystem. */ 59 static inline int 60 __gthread_objc_close_thread_system (void) 61 { 62 /* No thread support available */ 63 return -1; 64 } 65 66 /* Backend thread functions */ 67 68 /* Create a new thread of execution. */ 69 static inline objc_thread_t 70 __gthread_objc_thread_detach (void (* func)(void *), void * arg _GLIBCXX_UNUSED) 71 { 72 /* No thread support available */ 73 return NULL; 74 } 75 76 /* Set the current thread's priority. */ 77 static inline int 78 __gthread_objc_thread_set_priority (int priority _GLIBCXX_UNUSED) 79 { 80 /* No thread support available */ 81 return -1; 82 } 83 84 /* Return the current thread's priority. */ 85 static inline int 86 __gthread_objc_thread_get_priority (void) 87 { 88 return OBJC_THREAD_INTERACTIVE_PRIORITY; 89 } 90 91 /* Yield our process time to another thread. */ 92 static inline void 93 __gthread_objc_thread_yield (void) 94 { 95 return; 96 } 97 98 /* Terminate the current thread. */ 99 static inline int 100 __gthread_objc_thread_exit (void) 101 { 102 /* No thread support available */ 103 /* Should we really exit the program */ 104 /* exit (&__objc_thread_exit_status); */ 105 return -1; 106 } 107 108 /* Returns an integer value which uniquely describes a thread. */ 109 static inline objc_thread_t 110 __gthread_objc_thread_id (void) 111 { 112 /* No thread support, use 1. */ 113 return (objc_thread_t) 1; 114 } 115 116 /* Sets the thread's local storage pointer. */ 117 static inline int 118 __gthread_objc_thread_set_data (void *value) 119 { 120 thread_local_storage = value; 121 return 0; 122 } 123 124 /* Returns the thread's local storage pointer. */ 125 static inline void * 126 __gthread_objc_thread_get_data (void) 127 { 128 return thread_local_storage; 129 } 130 131 /* Backend mutex functions */ 132 133 /* Allocate a mutex. */ 134 static inline int 135 __gthread_objc_mutex_allocate (objc_mutex_t mutex _GLIBCXX_UNUSED) 136 { 137 return 0; 138 } 139 140 /* Deallocate a mutex. */ 141 static inline int 142 __gthread_objc_mutex_deallocate (objc_mutex_t mutex _GLIBCXX_UNUSED) 143 { 144 return 0; 145 } 146 147 /* Grab a lock on a mutex. */ 148 static inline int 149 __gthread_objc_mutex_lock (objc_mutex_t mutex _GLIBCXX_UNUSED) 150 { 151 /* There can only be one thread, so we always get the lock */ 152 return 0; 153 } 154 155 /* Try to grab a lock on a mutex. */ 156 static inline int 157 __gthread_objc_mutex_trylock (objc_mutex_t mutex _GLIBCXX_UNUSED) 158 { 159 /* There can only be one thread, so we always get the lock */ 160 return 0; 161 } 162 163 /* Unlock the mutex */ 164 static inline int 165 __gthread_objc_mutex_unlock (objc_mutex_t mutex _GLIBCXX_UNUSED) 166 { 167 return 0; 168 } 169 170 /* Backend condition mutex functions */ 171 172 /* Allocate a condition. */ 173 static inline int 174 __gthread_objc_condition_allocate (objc_condition_t condition _GLIBCXX_UNUSED) 175 { 176 return 0; 177 } 178 179 /* Deallocate a condition. */ 180 static inline int 181 __gthread_objc_condition_deallocate (objc_condition_t condition _GLIBCXX_UNUSED) 182 { 183 return 0; 184 } 185 186 /* Wait on the condition */ 187 static inline int 188 __gthread_objc_condition_wait (objc_condition_t condition _GLIBCXX_UNUSED, 189 objc_mutex_t mutex _GLIBCXX_UNUSED) 190 { 191 return 0; 192 } 193 194 /* Wake up all threads waiting on this condition. */ 195 static inline int 196 __gthread_objc_condition_broadcast (objc_condition_t condition _GLIBCXX_UNUSED) 197 { 198 return 0; 199 } 200 201 /* Wake up one thread waiting on this condition. */ 202 static inline int 203 __gthread_objc_condition_signal (objc_condition_t condition _GLIBCXX_UNUSED) 204 { 205 return 0; 206 } 207 208 #else /* _LIBOBJC */ 209 210 static inline int 211 __gthread_active_p (void) 212 { 213 return 0; 214 } 215 216 static inline int 217 __gthread_once (__gthread_once_t *__once _GLIBCXX_UNUSED, void (*__func) (void) _GLIBCXX_UNUSED) 218 { 219 return 0; 220 } 221 222 static inline int _GLIBCXX_UNUSED 223 __gthread_key_create (__gthread_key_t *__key _GLIBCXX_UNUSED, void (*__func) (void *) _GLIBCXX_UNUSED) 224 { 225 return 0; 226 } 227 228 static int _GLIBCXX_UNUSED 229 __gthread_key_delete (__gthread_key_t __key _GLIBCXX_UNUSED) 230 { 231 return 0; 232 } 233 234 static inline void * 235 __gthread_getspecific (__gthread_key_t __key _GLIBCXX_UNUSED) 236 { 237 return 0; 238 } 239 240 static inline int 241 __gthread_setspecific (__gthread_key_t __key _GLIBCXX_UNUSED, const void *__v _GLIBCXX_UNUSED) 242 { 243 return 0; 244 } 245 246 static inline int 247 __gthread_mutex_destroy (__gthread_mutex_t *__mutex _GLIBCXX_UNUSED) 248 { 249 return 0; 250 } 251 252 static inline int 253 __gthread_mutex_lock (__gthread_mutex_t *__mutex _GLIBCXX_UNUSED) 254 { 255 return 0; 256 } 257 258 static inline int 259 __gthread_mutex_trylock (__gthread_mutex_t *__mutex _GLIBCXX_UNUSED) 260 { 261 return 0; 262 } 263 264 static inline int 265 __gthread_mutex_unlock (__gthread_mutex_t *__mutex _GLIBCXX_UNUSED) 266 { 267 return 0; 268 } 269 270 static inline int 271 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) 272 { 273 return __gthread_mutex_lock (__mutex); 274 } 275 276 static inline int 277 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) 278 { 279 return __gthread_mutex_trylock (__mutex); 280 } 281 282 static inline int 283 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) 284 { 285 return __gthread_mutex_unlock (__mutex); 286 } 287 288 static inline int 289 __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) 290 { 291 return __gthread_mutex_destroy (__mutex); 292 } 293 294 #endif /* _LIBOBJC */ 295 296 #undef _GLIBCXX_UNUSED 297 298 #endif /* ! _GLIBCXX_GCC_GTHR_SINGLE_H */ 299
