1 /* Threads compatibility routines for libgcc2 and libobjc. */
2 /* Compile this one with gcc. */
3 /* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GCC.
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 2, or (at your option) any later
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
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
22 /* As a special exception, if you link this library with other files,
23 some of which are compiled with GCC, to produce an executable,
24 this library does not by itself cause the resulting executable
25 to be covered by the GNU General Public License.
26 This exception does not however invalidate any other reasons why
27 the executable file might be covered by the GNU General Public License. */
29 #ifndef GCC_GTHR_NKS_H
30 #define GCC_GTHR_NKS_H
32 /* NKS threads specific definitions.
33 Easy, since the interface is mostly one-to-one mapping. */
37 #define NKS_NO_INLINE_FUNCS
41 typedef NXKey_t __gthread_key_t;
42 typedef NXMutex_t *__gthread_mutex_t;
43 typedef NXMutex_t *__gthread_recursive_mutex_t;
45 #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
46 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
49 __gthread_active_p (void)
56 /* This is the config.h file in libobjc/ */
63 /* Key structure for maintaining thread specific storage */
64 static NXKey_t _objc_thread_storage;
66 /* Backend initialization functions */
68 /* Initialize the threads subsystem. */
70 __gthread_objc_init_thread_system (void)
72 /* Initialize the thread storage key. */
73 if (NXKeyCreate (NULL, NULL, &_objc_thread_storage) == 0)
78 /* Close the threads subsystem. */
80 __gthread_objc_close_thread_system (void)
82 if (NXKeyDelete (_objc_thread_storage) == 0)
87 /* Backend thread functions */
89 /* Create a new thread of execution. */
90 static inline objc_thread_t
91 __gthread_objc_thread_detach (void (*func)(void *), void *arg)
93 objc_thread_t thread_id;
95 NXThreadId_t new_thread_handle;
98 if ((context = NXContextAlloc (func, arg, NX_PRIO_MED, 0, 0, 0, &err)) == NULL)
100 else if (NXThreadCreate (context, NX_THR_DETACHED, &new_thread_handle) == 0)
101 thread_id = (objc_thread_t) new_thread_handle;
103 NXContextFree (context);
110 /* Set the current thread's priority. */
112 __gthread_objc_thread_set_priority (int priority)
114 if (NXThreadSetPriority (NXThreadGetId (), priority) == 0)
119 /* Return the current thread's priority. */
121 __gthread_objc_thread_get_priority (void)
125 if (NXThreadGetPriority (NXThreadGetId (), &priority) == 0)
130 /* Yield our process time to another thread. */
132 __gthread_objc_thread_yield (void)
137 /* Terminate the current thread. */
139 __gthread_objc_thread_exit (void)
141 /* exit the thread */
142 NXThreadExit (&__objc_thread_exit_status);
144 /* Failed if we reached here */
148 /* Returns an integer value which uniquely describes a thread. */
149 static inline objc_thread_t
150 __gthread_objc_thread_id (void)
152 (objc_thread_t) NXThreadGetId ();
155 /* Sets the thread's local storage pointer. */
157 __gthread_objc_thread_set_data (void *value)
159 return NXKeySetValue (_objc_thread_storage, value);
162 /* Returns the thread's local storage pointer. */
164 __gthread_objc_thread_get_data (void)
168 if (NXKeyGetValue (_objc_thread_storage, &value) == 0)
173 /* Backend mutex functions */
175 /* Allocate a mutex. */
177 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
179 static const NX_LOCK_INFO_ALLOC (info, "GNU ObjC", 0);
181 if ((mutex->backend = NXMutexAlloc (0, 0, &info)) == NULL)
186 /* Deallocate a mutex. */
188 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
190 while (NXMutexIsOwned ((NXMutex_t *)mutex->backend))
191 NXUnlock ((NXMutex_t *)mutex->backend);
192 if (NXMutexFree ((NXMutex_t *)mutex->backend) != 0)
194 mutex->backend = NULL;
198 /* Grab a lock on a mutex. */
200 __gthread_objc_mutex_lock (objc_mutex_t mutex)
202 return NXLock ((NXMutex_t *)mutex->backend);
205 /* Try to grab a lock on a mutex. */
207 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
209 if (!NXTryLock ((NXMutex_t *)mutex->backend))
214 /* Unlock the mutex */
216 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
218 return NXUnlock ((NXMutex_t *)mutex->backend);
221 /* Backend condition mutex functions */
223 /* Allocate a condition. */
225 __gthread_objc_condition_allocate (objc_condition_t condition)
227 condition->backend = NXCondAlloc (NULL);
228 if (condition->backend == NULL)
234 /* Deallocate a condition. */
236 __gthread_objc_condition_deallocate (objc_condition_t condition)
238 if (NXCondFree ((NXCond_t *)condition->backend) != 0)
240 condition->backend = NULL;
244 /* Wait on the condition */
246 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
248 return NXCondWait ((NXCond_t *)condition->backend, (NXMutex_t *)mutex->backend);
251 /* Wake up all threads waiting on this condition. */
253 __gthread_objc_condition_broadcast (objc_condition_t condition)
255 return NXCondBroadcast ((NXCond_t *)condition->backend);
258 /* Wake up one thread waiting on this condition. */
260 __gthread_objc_condition_signal (objc_condition_t condition)
262 return NXCondSignal ((NXCond_t *)condition->backend);
267 #if defined(__cplusplus)
268 # include <bits/atomicity.h>
269 /* The remaining conditions here are temporary until there is
270 an application accessible atomic operations API set... */
271 #elif defined(_M_IA64) || defined(__ia64__)
272 # include <../libstdc++-v3/config/cpu/ia64/bits/atomicity.h>
273 #elif defined(_M_IX86) || defined(__i486__)
274 # include <../libstdc++-v3/config/cpu/i486/bits/atomicity.h>
275 #elif defined(_M_AMD64) || defined(__x86_64__)
276 # include <../libstdc++-v3/config/cpu/x86-64/bits/atomicity.h>
279 typedef volatile long __gthread_once_t;
281 #define __GTHREAD_ONCE_INIT 0
284 __gthread_once (__gthread_once_t *once, void (*func) (void))
286 if (__compare_and_swap (once, 0, 1))
300 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
302 return NXKeyCreate (dtor, NULL, key);
306 __gthread_key_dtor (__gthread_key_t key, void *ptr)
308 /* Just reset the key value to zero. */
310 return NXKeySetValue (key, NULL);
315 __gthread_key_delete (__gthread_key_t key)
317 return NXKeyDelete (key);
321 __gthread_getspecific (__gthread_key_t key)
325 if (NXKeyGetValue (key, &value) == 0)
331 __gthread_setspecific (__gthread_key_t key, const void *ptr)
333 return NXKeySetValue (key, (void *)ptr);
337 __gthread_mutex_init_function (__gthread_mutex_t *mutex)
339 static const NX_LOCK_INFO_ALLOC (info, "GTHREADS", 0);
341 *mutex = NXMutexAlloc (0, 0, &info);
345 __gthread_mutex_lock (__gthread_mutex_t *mutex)
347 return NXLock (*mutex);
351 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
353 if (NXTryLock (*mutex))
359 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
361 return NXUnlock (*mutex);
365 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
367 static const NX_LOCK_INFO_ALLOC (info, "GTHREADS", 0);
369 *mutex = NXMutexAlloc (NX_MUTEX_RECURSIVE, 0, &info);
373 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
375 return NXLock (*mutex);
379 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
381 if (NXTryLock (*mutex))
387 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
389 return NXUnlock (*mutex);
392 #endif /* _LIBOBJC */
394 #endif /* not GCC_GTHR_NKS_H */