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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [gthr-nks.h] - Blame information for rev 826

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1 280 jeremybenn
/* Threads compatibility routines for libgcc2 and libobjc.  */
2
/* Compile this one with gcc.  */
3
/* Copyright (C) 2002, 2003, 2004, 2008, 2009 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 GCC_GTHR_NKS_H
27
#define GCC_GTHR_NKS_H
28
 
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/* NKS threads specific definitions.
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   Easy, since the interface is mostly one-to-one mapping.  */
31
 
32
#define __GTHREADS 1
33
 
34
#define NKS_NO_INLINE_FUNCS
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#include <nksapi.h>
36
#include <string.h>
37
 
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typedef NXKey_t __gthread_key_t;
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typedef NXMutex_t *__gthread_mutex_t;
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typedef NXMutex_t *__gthread_recursive_mutex_t;
41
 
42
#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
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#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
44
 
45
static inline int
46
__gthread_active_p (void)
47
{
48
  return 1;
49
}
50
 
51
#ifdef _LIBOBJC
52
 
53
/* This is the config.h file in libobjc/ */
54
#include <config.h>
55
 
56
#ifdef HAVE_SCHED_H
57
# include <sched.h>
58
#endif
59
 
60
/* Key structure for maintaining thread specific storage */
61
static NXKey_t _objc_thread_storage;
62
 
63
/* Backend initialization functions */
64
 
65
/* Initialize the threads subsystem.  */
66
static inline int
67
__gthread_objc_init_thread_system (void)
68
{
69
  /* Initialize the thread storage key.  */
70
  if (NXKeyCreate (NULL, NULL, &_objc_thread_storage) == 0)
71
    return 0;
72
  return -1;
73
}
74
 
75
/* Close the threads subsystem.  */
76
static inline int
77
__gthread_objc_close_thread_system (void)
78
{
79
  if (NXKeyDelete (_objc_thread_storage) == 0)
80
    return 0;
81
  return -1;
82
}
83
 
84
/* Backend thread functions */
85
 
86
/* Create a new thread of execution.  */
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static inline objc_thread_t
88
__gthread_objc_thread_detach (void (*func)(void *), void *arg)
89
{
90
  objc_thread_t thread_id;
91
  NXContext_t context;
92
  NXThreadId_t new_thread_handle;
93
  int err;
94
 
95
  if ((context = NXContextAlloc (func, arg, NX_PRIO_MED, 0, 0, 0, &err)) == NULL)
96
    thread_id = NULL;
97
  else if (NXThreadCreate (context, NX_THR_DETACHED, &new_thread_handle) == 0)
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    thread_id = (objc_thread_t) new_thread_handle;
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  else {
100
    NXContextFree (context);
101
    thread_id = NULL;
102
  }
103
 
104
  return thread_id;
105
}
106
 
107
/* Set the current thread's priority.  */
108
static inline int
109
__gthread_objc_thread_set_priority (int priority)
110
{
111
  if (NXThreadSetPriority (NXThreadGetId (), priority) == 0)
112
    return 0;
113
  return -1;
114
}
115
 
116
/* Return the current thread's priority.  */
117
static inline int
118
__gthread_objc_thread_get_priority (void)
119
{
120
  int priority;
121
 
122
  if (NXThreadGetPriority (NXThreadGetId (), &priority) == 0)
123
    return priority;
124
  return -1;
125
}
126
 
127
/* Yield our process time to another thread.  */
128
static inline void
129
__gthread_objc_thread_yield (void)
130
{
131
  NXThreadYield ();
132
}
133
 
134
/* Terminate the current thread.  */
135
static inline int
136
__gthread_objc_thread_exit (void)
137
{
138
  /* exit the thread */
139
  NXThreadExit (&__objc_thread_exit_status);
140
 
141
  /* Failed if we reached here */
142
  return -1;
143
}
144
 
145
/* Returns an integer value which uniquely describes a thread.  */
146
static inline objc_thread_t
147
__gthread_objc_thread_id (void)
148
{
149
  (objc_thread_t) NXThreadGetId ();
150
}
151
 
152
/* Sets the thread's local storage pointer.  */
153
static inline int
154
__gthread_objc_thread_set_data (void *value)
155
{
156
  return NXKeySetValue (_objc_thread_storage, value);
157
}
158
 
159
/* Returns the thread's local storage pointer.  */
160
static inline void *
161
__gthread_objc_thread_get_data (void)
162
{
163
  void *value;
164
 
165
  if (NXKeyGetValue (_objc_thread_storage, &value) == 0)
166
    return value;
167
  return NULL;
168
}
169
 
170
/* Backend mutex functions */
171
 
172
/* Allocate a mutex.  */
173
static inline int
174
__gthread_objc_mutex_allocate (objc_mutex_t mutex)
175
{
176
  static const NX_LOCK_INFO_ALLOC (info, "GNU ObjC", 0);
177
 
178
  if ((mutex->backend = NXMutexAlloc (0, 0, &info)) == NULL)
179
    return 0;
180
  return -1;
181
}
182
 
183
/* Deallocate a mutex.  */
184
static inline int
185
__gthread_objc_mutex_deallocate (objc_mutex_t mutex)
186
{
187
  while (NXMutexIsOwned ((NXMutex_t *)mutex->backend))
188
    NXUnlock ((NXMutex_t *)mutex->backend);
189
  if (NXMutexFree ((NXMutex_t *)mutex->backend) != 0)
190
    return -1;
191
  mutex->backend = NULL;
192
  return 0;
193
}
194
 
195
/* Grab a lock on a mutex.  */
196
static inline int
197
__gthread_objc_mutex_lock (objc_mutex_t mutex)
198
{
199
  return NXLock ((NXMutex_t *)mutex->backend);
200
}
201
 
202
/* Try to grab a lock on a mutex.  */
203
static inline int
204
__gthread_objc_mutex_trylock (objc_mutex_t mutex)
205
{
206
  if (!NXTryLock ((NXMutex_t *)mutex->backend))
207
    return -1;
208
  return 0;
209
}
210
 
211
/* Unlock the mutex */
212
static inline int
213
__gthread_objc_mutex_unlock (objc_mutex_t mutex)
214
{
215
  return NXUnlock ((NXMutex_t *)mutex->backend);
216
}
217
 
218
/* Backend condition mutex functions */
219
 
220
/* Allocate a condition.  */
221
static inline int
222
__gthread_objc_condition_allocate (objc_condition_t condition)
223
{
224
  condition->backend = NXCondAlloc (NULL);
225
  if (condition->backend == NULL)
226
    return -1;
227
 
228
  return 0;
229
}
230
 
231
/* Deallocate a condition.  */
232
static inline int
233
__gthread_objc_condition_deallocate (objc_condition_t condition)
234
{
235
   if (NXCondFree ((NXCond_t *)condition->backend) != 0)
236
     return -1;
237
   condition->backend = NULL;
238
   return 0;
239
}
240
 
241
/* Wait on the condition */
242
static inline int
243
__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
244
{
245
  return NXCondWait ((NXCond_t *)condition->backend, (NXMutex_t *)mutex->backend);
246
}
247
 
248
/* Wake up all threads waiting on this condition.  */
249
static inline int
250
__gthread_objc_condition_broadcast (objc_condition_t condition)
251
{
252
  return NXCondBroadcast ((NXCond_t *)condition->backend);
253
}
254
 
255
/* Wake up one thread waiting on this condition.  */
256
static inline int
257
__gthread_objc_condition_signal (objc_condition_t condition)
258
{
259
  return NXCondSignal ((NXCond_t *)condition->backend);
260
}
261
 
262
#else /* _LIBOBJC */
263
 
264
#if defined(__cplusplus)
265
# include <bits/atomicity.h>
266
/* The remaining conditions here are temporary until there is
267
   an application accessible atomic operations API set... */
268
#elif defined(_M_IA64) || defined(__ia64__)
269
# include <../libstdc++-v3/config/cpu/ia64/bits/atomicity.h>
270
#elif defined(_M_IX86) || defined(__i486__)
271
# include <../libstdc++-v3/config/cpu/i486/bits/atomicity.h>
272
#elif defined(_M_AMD64) || defined(__x86_64__)
273
# include <../libstdc++-v3/config/cpu/x86-64/bits/atomicity.h>
274
#endif
275
 
276
typedef volatile long __gthread_once_t;
277
 
278
#define __GTHREAD_ONCE_INIT 0
279
 
280
static inline int
281
__gthread_once (__gthread_once_t *__once, void (*__func) (void))
282
{
283
  if (__compare_and_swap (__once, 0, 1))
284
  {
285
    __func ();
286
    *__once |= 2;
287
  }
288
  else
289
  {
290
    while (!(*__once & 2))
291
      NXThreadYield ();
292
  }
293
  return 0;
294
}
295
 
296
static inline int
297
__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
298
{
299
  return NXKeyCreate (__dtor, NULL, __key);
300
}
301
 
302
static inline int
303
__gthread_key_dtor (__gthread_key_t __key, void *__ptr)
304
{
305
  /* Just reset the key value to zero. */
306
  if (__ptr)
307
    return NXKeySetValue (__key, NULL);
308
  return 0;
309
}
310
 
311
static inline int
312
__gthread_key_delete (__gthread_key_t __key)
313
{
314
  return NXKeyDelete (__key);
315
}
316
 
317
static inline void *
318
__gthread_getspecific (__gthread_key_t __key)
319
{
320
  void *__value;
321
 
322
  if (NXKeyGetValue (__key, &__value) == 0)
323
    return __value;
324
  return NULL;
325
}
326
 
327
static inline int
328
__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
329
{
330
  return NXKeySetValue (__key, (void *)__ptr);
331
}
332
 
333
static inline void
334
__gthread_mutex_init_function (__gthread_mutex_t *__mutex)
335
{
336
  static const NX_LOCK_INFO_ALLOC (__info, "GTHREADS", 0);
337
 
338
  *__mutex = NXMutexAlloc (0, 0, &__info);
339
}
340
 
341
static inline int
342
__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(__mutex))
343
{
344
  return 0;
345
}
346
 
347
static inline int
348
__gthread_mutex_lock (__gthread_mutex_t *__mutex)
349
{
350
  return NXLock (*__mutex);
351
}
352
 
353
static inline int
354
__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
355
{
356
  if (NXTryLock (*__mutex))
357
    return 0;
358
  return -1;
359
}
360
 
361
static inline int
362
__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
363
{
364
  return NXUnlock (*__mutex);
365
}
366
 
367
static inline void
368
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
369
{
370
  static const NX_LOCK_INFO_ALLOC (__info, "GTHREADS", 0);
371
 
372
  *__mutex = NXMutexAlloc (NX_MUTEX_RECURSIVE, 0, &__info);
373
}
374
 
375
static inline int
376
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
377
{
378
  return NXLock (*__mutex);
379
}
380
 
381
static inline int
382
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
383
{
384
  if (NXTryLock (*__mutex))
385
    return 0;
386
  return -1;
387
}
388
 
389
static inline int
390
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
391
{
392
  return NXUnlock (*__mutex);
393
}
394
 
395
#endif /* _LIBOBJC */
396
 
397
#endif /* not GCC_GTHR_NKS_H */

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