1 | /* thread.h |
---|
2 | * |
---|
3 | * This include file contains all constants and structures associated |
---|
4 | * with the thread control block. |
---|
5 | * |
---|
6 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
---|
7 | * On-Line Applications Research Corporation (OAR). |
---|
8 | * All rights assigned to U.S. Government, 1994. |
---|
9 | * |
---|
10 | * This material may be reproduced by or for the U.S. Government pursuant |
---|
11 | * to the copyright license under the clause at DFARS 252.227-7013. This |
---|
12 | * notice must appear in all copies of this file and its derivatives. |
---|
13 | * |
---|
14 | * $Id$ |
---|
15 | */ |
---|
16 | |
---|
17 | #ifndef __RTEMS_THREAD_h |
---|
18 | #define __RTEMS_THREAD_h |
---|
19 | |
---|
20 | #ifdef __cplusplus |
---|
21 | extern "C" { |
---|
22 | #endif |
---|
23 | |
---|
24 | #include <rtems/asr.h> |
---|
25 | #include <rtems/attr.h> |
---|
26 | #include <rtems/context.h> |
---|
27 | #include <rtems/cpu.h> |
---|
28 | #include <rtems/eventset.h> |
---|
29 | #include <rtems/modes.h> |
---|
30 | #include <rtems/mppkt.h> |
---|
31 | #include <rtems/object.h> |
---|
32 | #include <rtems/options.h> |
---|
33 | #include <rtems/priority.h> |
---|
34 | #include <rtems/stack.h> |
---|
35 | #include <rtems/states.h> |
---|
36 | #include <rtems/tod.h> |
---|
37 | #include <rtems/tqdata.h> |
---|
38 | #include <rtems/watchdog.h> |
---|
39 | |
---|
40 | /* |
---|
41 | * Notepads constants (indices into notepad array) |
---|
42 | */ |
---|
43 | |
---|
44 | #define RTEMS_NOTEPAD_FIRST 0 /* lowest numbered notepad */ |
---|
45 | #define RTEMS_NOTEPAD_0 0 /* notepad location 0 */ |
---|
46 | #define RTEMS_NOTEPAD_1 1 /* notepad location 1 */ |
---|
47 | #define RTEMS_NOTEPAD_2 2 /* notepad location 2 */ |
---|
48 | #define RTEMS_NOTEPAD_3 3 /* notepad location 3 */ |
---|
49 | #define RTEMS_NOTEPAD_4 4 /* notepad location 4 */ |
---|
50 | #define RTEMS_NOTEPAD_5 5 /* notepad location 5 */ |
---|
51 | #define RTEMS_NOTEPAD_6 6 /* notepad location 6 */ |
---|
52 | #define RTEMS_NOTEPAD_7 7 /* notepad location 7 */ |
---|
53 | #define RTEMS_NOTEPAD_8 8 /* notepad location 8 */ |
---|
54 | #define RTEMS_NOTEPAD_9 9 /* notepad location 9 */ |
---|
55 | #define RTEMS_NOTEPAD_10 10 /* notepad location 10 */ |
---|
56 | #define RTEMS_NOTEPAD_11 11 /* notepad location 11 */ |
---|
57 | #define RTEMS_NOTEPAD_12 12 /* notepad location 12 */ |
---|
58 | #define RTEMS_NOTEPAD_13 13 /* notepad location 13 */ |
---|
59 | #define RTEMS_NOTEPAD_14 14 /* notepad location 14 */ |
---|
60 | #define RTEMS_NOTEPAD_15 15 /* notepad location 15 */ |
---|
61 | #define RTEMS_NOTEPAD_LAST RTEMS_NOTEPAD_15 /* highest numbered notepad */ |
---|
62 | |
---|
63 | #define RTEMS_NUMBER_NOTEPADS (RTEMS_NOTEPAD_LAST+1) |
---|
64 | |
---|
65 | /* |
---|
66 | * The following defines the "return type" of an RTEMS thread. |
---|
67 | * |
---|
68 | * NOTE: Keep both types for internal threads. |
---|
69 | */ |
---|
70 | |
---|
71 | typedef void rtems_task; |
---|
72 | typedef void Thread; |
---|
73 | |
---|
74 | /* |
---|
75 | * The following defines the argument to an RTEMS thread. |
---|
76 | */ |
---|
77 | |
---|
78 | typedef unsigned32 rtems_task_argument; |
---|
79 | typedef unsigned32 Thread_Argument; |
---|
80 | |
---|
81 | /* |
---|
82 | * The following defines the type for the entry point of an RTEMS thread. |
---|
83 | */ |
---|
84 | |
---|
85 | typedef rtems_task ( *rtems_task_entry )( |
---|
86 | rtems_task_argument |
---|
87 | ); |
---|
88 | |
---|
89 | typedef Thread ( *Thread_Entry )( |
---|
90 | Thread_Argument |
---|
91 | ); |
---|
92 | |
---|
93 | /* |
---|
94 | * The following structure contains the information which defines |
---|
95 | * the starting state of a thread. |
---|
96 | */ |
---|
97 | |
---|
98 | typedef struct { |
---|
99 | Thread_Entry entry_point; /* starting thread address */ |
---|
100 | unsigned32 initial_argument; /* initial argument */ |
---|
101 | rtems_mode initial_modes; /* initial mode */ |
---|
102 | rtems_task_priority initial_priority; /* initial priority */ |
---|
103 | void *fp_context; /* initial FP context area address */ |
---|
104 | Stack_Control Initial_stack; /* stack information */ |
---|
105 | } Thread_Start_information; |
---|
106 | |
---|
107 | /* |
---|
108 | * The following structure contains the information necessary to manage |
---|
109 | * a thread which it is waiting for a resource. |
---|
110 | */ |
---|
111 | |
---|
112 | typedef struct { |
---|
113 | Objects_Id id; /* waiting on this object */ |
---|
114 | rtems_option option_set; /* wait mode */ |
---|
115 | union { |
---|
116 | unsigned32 segment_size; /* size of segment requested */ |
---|
117 | rtems_event_set event_condition; |
---|
118 | } Extra; |
---|
119 | void *return_argument; /* address of user return param */ |
---|
120 | rtems_status_code return_code; /* status for thread awakened */ |
---|
121 | Chain_Control Block2n; /* 2 - n priority blocked chain */ |
---|
122 | Thread_queue_Control *queue; /* pointer to thread queue */ |
---|
123 | } Thread_Wait_information; |
---|
124 | |
---|
125 | /* |
---|
126 | * The following defines the control block used to manage |
---|
127 | * each thread proxy. |
---|
128 | * |
---|
129 | * NOTE: It is critical that proxies and threads have identical |
---|
130 | * memory images for the shared part. |
---|
131 | */ |
---|
132 | |
---|
133 | typedef struct { |
---|
134 | Objects_Control Object; |
---|
135 | Objects_Name name; |
---|
136 | States_Control current_state; |
---|
137 | rtems_task_priority current_priority; |
---|
138 | rtems_task_priority real_priority; |
---|
139 | unsigned32 resource_count; |
---|
140 | Thread_Wait_information Wait; |
---|
141 | Watchdog_Control Timer; |
---|
142 | rtems_packet_prefix *receive_packet; |
---|
143 | /****************** end of common block ********************/ |
---|
144 | Chain_Node Active; |
---|
145 | } Thread_Proxy_control; |
---|
146 | |
---|
147 | |
---|
148 | /* |
---|
149 | * The following record defines the control block used |
---|
150 | * to manage each thread. |
---|
151 | * |
---|
152 | * NOTE: It is critical that proxies and threads have identical |
---|
153 | * memory images for the shared part. |
---|
154 | */ |
---|
155 | |
---|
156 | typedef struct { |
---|
157 | Objects_Control Object; |
---|
158 | Objects_Name name; |
---|
159 | States_Control current_state; |
---|
160 | rtems_task_priority current_priority; |
---|
161 | rtems_task_priority real_priority; |
---|
162 | unsigned32 resource_count; |
---|
163 | Thread_Wait_information Wait; |
---|
164 | Watchdog_Control Timer; |
---|
165 | rtems_packet_prefix *receive_packet; |
---|
166 | /****************** end of common block ********************/ |
---|
167 | Chain_Control *ready; |
---|
168 | Priority_Information Priority_map; |
---|
169 | rtems_event_set pending_events; |
---|
170 | rtems_event_set events_out; |
---|
171 | Thread_Start_information Start; |
---|
172 | ASR_Information Signal; |
---|
173 | rtems_mode current_modes; |
---|
174 | rtems_attribute attribute_set; |
---|
175 | Context_Control Registers; |
---|
176 | void *fp_context; |
---|
177 | unsigned32 Notepads[ RTEMS_NUMBER_NOTEPADS ]; |
---|
178 | void *extension; |
---|
179 | } Thread_Control; |
---|
180 | |
---|
181 | /* |
---|
182 | * External API name for Thread_Control |
---|
183 | */ |
---|
184 | |
---|
185 | typedef Thread_Control rtems_tcb; |
---|
186 | |
---|
187 | /* |
---|
188 | * The following declares the dispatch critical section nesting |
---|
189 | * counter which is used to prevent context switches at inopportune |
---|
190 | * moments. |
---|
191 | */ |
---|
192 | |
---|
193 | EXTERN unsigned32 _Thread_Dispatch_disable_level; |
---|
194 | |
---|
195 | /* |
---|
196 | * The following data items are used to manage timeslicing. |
---|
197 | */ |
---|
198 | |
---|
199 | EXTERN unsigned32 _Thread_Ticks_remaining_in_timeslice; |
---|
200 | EXTERN unsigned32 _Thread_Ticks_per_timeslice; |
---|
201 | |
---|
202 | /* |
---|
203 | * The following points to the array of FIFOs used to manage the |
---|
204 | * set of ready threads. |
---|
205 | */ |
---|
206 | |
---|
207 | EXTERN Chain_Control *_Thread_Ready_chain; |
---|
208 | |
---|
209 | /* |
---|
210 | * The following points to the thread which is currently executing. |
---|
211 | * This thread is implicitly manipulated by numerous directives. |
---|
212 | */ |
---|
213 | |
---|
214 | EXTERN Thread_Control *_Thread_Executing; |
---|
215 | |
---|
216 | /* |
---|
217 | * The following points to the highest priority ready thread |
---|
218 | * in the system. Unless the current thread is RTEMS_NO_PREEMPT, |
---|
219 | * then this thread will be context switched to when the next |
---|
220 | * dispatch occurs. |
---|
221 | */ |
---|
222 | |
---|
223 | EXTERN Thread_Control *_Thread_Heir; |
---|
224 | |
---|
225 | /* |
---|
226 | * The following points to the thread whose floating point |
---|
227 | * context is currently loaded. |
---|
228 | */ |
---|
229 | |
---|
230 | EXTERN Thread_Control *_Thread_Allocated_fp; |
---|
231 | |
---|
232 | /* |
---|
233 | * The following defines the information control block used to |
---|
234 | * manage this class of objects. |
---|
235 | */ |
---|
236 | |
---|
237 | EXTERN Objects_Information _Thread_Information; |
---|
238 | |
---|
239 | /* |
---|
240 | * The following context area contains the context of the "thread" |
---|
241 | * which invoked rtems_initialize_executive. This context is restored |
---|
242 | * as the last action of the rtems_shutdown_executive directive. Thus |
---|
243 | * control of the processor can be returned to the environment |
---|
244 | * which initiated RTEMS. |
---|
245 | */ |
---|
246 | |
---|
247 | EXTERN Context_Control _Thread_BSP_context; |
---|
248 | |
---|
249 | /* |
---|
250 | * _Thread_Handler_initialization |
---|
251 | * |
---|
252 | * DESCRIPTION: |
---|
253 | * |
---|
254 | * This routine performs the initialization necessary for this handler. |
---|
255 | */ |
---|
256 | |
---|
257 | void _Thread_Handler_initialization ( |
---|
258 | unsigned32 maximum_tasks, |
---|
259 | unsigned32 ticks_per_timeslice, |
---|
260 | unsigned32 maximum_proxies |
---|
261 | ); |
---|
262 | |
---|
263 | /* |
---|
264 | * _Thread_Start_multitasking |
---|
265 | * |
---|
266 | * DESCRIPTION: |
---|
267 | * |
---|
268 | * This routine initiates multitasking. It is invoked only as |
---|
269 | * part of initialization and its invocation is the last act of |
---|
270 | * the rtems_initialize_executive directive. |
---|
271 | */ |
---|
272 | |
---|
273 | void _Thread_Start_multitasking ( |
---|
274 | Thread_Control *system_thread, |
---|
275 | Thread_Control *idle_thread |
---|
276 | ); |
---|
277 | |
---|
278 | /* |
---|
279 | * _Thread_Stop_multitasking |
---|
280 | * |
---|
281 | * DESCRIPTION: |
---|
282 | * |
---|
283 | * This routine halts multitasking and returns control to |
---|
284 | * the "thread" which initially invoked the rtems_initialize_executive |
---|
285 | * directive. |
---|
286 | */ |
---|
287 | |
---|
288 | STATIC INLINE void _Thread_Stop_multitasking( void ); |
---|
289 | |
---|
290 | /* |
---|
291 | * _Thread_Dispatch_initialization |
---|
292 | * |
---|
293 | * DESCRIPTION: |
---|
294 | * |
---|
295 | * This routine initializes the thread dispatching subsystem. |
---|
296 | */ |
---|
297 | |
---|
298 | STATIC INLINE void _Thread_Dispatch_initialization( void ); |
---|
299 | |
---|
300 | /* |
---|
301 | * _Thread_Dispatch |
---|
302 | * |
---|
303 | * DESCRIPTION: |
---|
304 | * |
---|
305 | * This routine is responsible for transferring control of the |
---|
306 | * processor from the executing thread to the heir thread. As part |
---|
307 | * of this process, it is responsible for the following actions: |
---|
308 | * |
---|
309 | * + saving the context of the executing thread |
---|
310 | * + restoring the context of the heir thread |
---|
311 | * + dispatching any signals for the resulting executing thread |
---|
312 | */ |
---|
313 | |
---|
314 | void _Thread_Dispatch( void ); |
---|
315 | |
---|
316 | /* |
---|
317 | * _Thread_Ready |
---|
318 | * |
---|
319 | * DESCRIPTION: |
---|
320 | * |
---|
321 | * This routine removes any set states for the_thread. It performs |
---|
322 | * any necessary scheduling operations including the selection of |
---|
323 | * a new heir thread. |
---|
324 | */ |
---|
325 | |
---|
326 | void _Thread_Ready( |
---|
327 | Thread_Control *the_thread |
---|
328 | ); |
---|
329 | |
---|
330 | /* |
---|
331 | * _Thread_Clear_state |
---|
332 | * |
---|
333 | * DESCRIPTION: |
---|
334 | * |
---|
335 | * This routine clears the indicated STATES for the_thread. It performs |
---|
336 | * any necessary scheduling operations including the selection of |
---|
337 | * a new heir thread. |
---|
338 | */ |
---|
339 | |
---|
340 | void _Thread_Clear_state( |
---|
341 | Thread_Control *the_thread, |
---|
342 | States_Control state |
---|
343 | ); |
---|
344 | |
---|
345 | /* |
---|
346 | * _Thread_Set_state |
---|
347 | * |
---|
348 | * DESCRIPTION: |
---|
349 | * |
---|
350 | * This routine sets the indicated states for the_thread. It performs |
---|
351 | * any necessary scheduling operations including the selection of |
---|
352 | * a new heir thread. |
---|
353 | * |
---|
354 | */ |
---|
355 | |
---|
356 | void _Thread_Set_state( |
---|
357 | Thread_Control *the_thread, |
---|
358 | States_Control state |
---|
359 | ); |
---|
360 | |
---|
361 | /* |
---|
362 | * _Thread_Set_transient |
---|
363 | * |
---|
364 | * DESCRIPTION: |
---|
365 | * |
---|
366 | * This routine sets the TRANSIENT state for the_thread. It performs |
---|
367 | * any necessary scheduling operations including the selection of |
---|
368 | * a new heir thread. |
---|
369 | */ |
---|
370 | |
---|
371 | void _Thread_Set_transient( |
---|
372 | Thread_Control *the_thread |
---|
373 | ); |
---|
374 | |
---|
375 | /* |
---|
376 | * _Thread_Reset_timeslice |
---|
377 | * |
---|
378 | * DESCRIPTION: |
---|
379 | * |
---|
380 | * This routine is invoked upon expiration of the currently |
---|
381 | * executing thread's timeslice. If no other thread's are ready |
---|
382 | * at the priority of the currently executing thread, then the |
---|
383 | * executing thread's timeslice is reset. Otherwise, the |
---|
384 | * currently executing thread is placed at the rear of the |
---|
385 | * RTEMS_FIFO for this priority and a new heir is selected. |
---|
386 | */ |
---|
387 | |
---|
388 | void _Thread_Reset_timeslice( void ); |
---|
389 | |
---|
390 | /* |
---|
391 | * _Thread_Tickle_timeslice |
---|
392 | * |
---|
393 | * DESCRIPTION: |
---|
394 | * |
---|
395 | * This routine is invoked as part of processing each clock tick. |
---|
396 | * It is responsible for determining if the current thread allows |
---|
397 | * timeslicing and, if so, when its timeslice expires. |
---|
398 | */ |
---|
399 | |
---|
400 | void _Thread_Tickle_timeslice( void ); |
---|
401 | |
---|
402 | /* |
---|
403 | * _Thread_Yield_processor |
---|
404 | * |
---|
405 | * DESCRIPTION: |
---|
406 | * |
---|
407 | * This routine is invoked when a thread wishes to voluntarily |
---|
408 | * transfer control of the processor to another thread of equal |
---|
409 | * or greater priority. |
---|
410 | */ |
---|
411 | |
---|
412 | void _Thread_Yield_processor( void ); |
---|
413 | |
---|
414 | /* |
---|
415 | * _Thread_Is_executing |
---|
416 | * |
---|
417 | * DESCRIPTION: |
---|
418 | * |
---|
419 | * This function returns TRUE if the_thread is the currently executing |
---|
420 | * thread, and FALSE otherwise. |
---|
421 | */ |
---|
422 | |
---|
423 | STATIC INLINE boolean _Thread_Is_executing ( |
---|
424 | Thread_Control *the_thread |
---|
425 | ); |
---|
426 | |
---|
427 | /* |
---|
428 | * _Thread_Is_heir |
---|
429 | * |
---|
430 | * DESCRIPTION: |
---|
431 | * |
---|
432 | * This function returns TRUE if the_thread is the heir |
---|
433 | * thread, and FALSE otherwise. |
---|
434 | */ |
---|
435 | |
---|
436 | STATIC INLINE boolean _Thread_Is_executing ( |
---|
437 | Thread_Control *the_thread |
---|
438 | ); |
---|
439 | |
---|
440 | /* |
---|
441 | * _Thread_Is_executing_also_the_heir |
---|
442 | * |
---|
443 | * DESCRIPTION: |
---|
444 | * |
---|
445 | * This function returns TRUE if the currently executing thread |
---|
446 | * is also the heir thread, and FALSE otherwise. |
---|
447 | */ |
---|
448 | |
---|
449 | STATIC INLINE boolean _Thread_Is_executing_also_the_heir( void ); |
---|
450 | |
---|
451 | /* |
---|
452 | * _Thread_Load_environment |
---|
453 | * |
---|
454 | * DESCRIPTION: |
---|
455 | * |
---|
456 | * This routine initializes the context of the_thread to its |
---|
457 | * appropriate starting state. |
---|
458 | */ |
---|
459 | |
---|
460 | void _Thread_Load_environment( |
---|
461 | Thread_Control *the_thread |
---|
462 | ); |
---|
463 | |
---|
464 | /* |
---|
465 | * _Thread_Handler |
---|
466 | * |
---|
467 | * DESCRIPTION: |
---|
468 | * |
---|
469 | * This routine is the wrapper function for all threads. It is |
---|
470 | * the starting point for all threads. The user provided thread |
---|
471 | * entry point is invoked by this routine. Operations |
---|
472 | * which must be performed immediately before and after the user's |
---|
473 | * thread executes are found here. |
---|
474 | */ |
---|
475 | |
---|
476 | void _Thread_Handler( void ); |
---|
477 | |
---|
478 | /* |
---|
479 | * _Thread_Delay_ended |
---|
480 | * |
---|
481 | * DESCRIPTION: |
---|
482 | * |
---|
483 | * This routine is invoked when a thread must be unblocked at the |
---|
484 | * end of a delay such as the rtems_task_wake_after and rtems_task_wake_when |
---|
485 | * directives. |
---|
486 | */ |
---|
487 | |
---|
488 | void _Thread_Delay_ended( |
---|
489 | Objects_Id id, |
---|
490 | void *ignored |
---|
491 | ); |
---|
492 | |
---|
493 | /* |
---|
494 | * _Thread_Change_priority |
---|
495 | * |
---|
496 | * DESCRIPTION: |
---|
497 | * |
---|
498 | * This routine changes the current priority of the_thread to |
---|
499 | * new_priority. It performs any necessary scheduling operations |
---|
500 | * including the selection of a new heir thread. |
---|
501 | */ |
---|
502 | |
---|
503 | void _Thread_Change_priority ( |
---|
504 | Thread_Control *the_thread, |
---|
505 | rtems_task_priority new_priority |
---|
506 | ); |
---|
507 | |
---|
508 | /* |
---|
509 | * _Thread_Set_priority |
---|
510 | * |
---|
511 | * DESCRIPTION: |
---|
512 | * |
---|
513 | * This routine updates the priority related fields in the_thread |
---|
514 | * control block to indicate the current priority is now new_priority. |
---|
515 | */ |
---|
516 | |
---|
517 | void _Thread_Set_priority( |
---|
518 | Thread_Control *the_thread, |
---|
519 | rtems_task_priority new_priority |
---|
520 | ); |
---|
521 | |
---|
522 | /* |
---|
523 | * _Thread_Change_mode |
---|
524 | * |
---|
525 | * DESCRIPTION: |
---|
526 | * |
---|
527 | * This routine changes the current values of the modes |
---|
528 | * indicated by mask of the calling thread are changed to that |
---|
529 | * indicated in mode_set. The former mode of the thread is |
---|
530 | * returned in mode_set. If the changes in the current mode |
---|
531 | * indicate that a thread dispatch operation may be necessary, |
---|
532 | * then need_dispatch is TRUE, otherwise it is FALSE. |
---|
533 | */ |
---|
534 | |
---|
535 | boolean _Thread_Change_mode( |
---|
536 | rtems_mode new_mode_set, |
---|
537 | rtems_mode mask, |
---|
538 | rtems_mode *old_mode_set |
---|
539 | ); |
---|
540 | |
---|
541 | /* |
---|
542 | * _Thread_Resume |
---|
543 | * |
---|
544 | * DESCRIPTION: |
---|
545 | * |
---|
546 | * This routine clears the SUSPENDED state for the_thread. It performs |
---|
547 | * any necessary scheduling operations including the selection of |
---|
548 | * a new heir thread. |
---|
549 | */ |
---|
550 | |
---|
551 | STATIC INLINE void _Thread_Resume ( |
---|
552 | Thread_Control *the_thread |
---|
553 | ); |
---|
554 | |
---|
555 | /* |
---|
556 | * _Thread_Unblock |
---|
557 | * |
---|
558 | * DESCRIPTION: |
---|
559 | * |
---|
560 | * This routine clears any blocking state for the_thread. It performs |
---|
561 | * any necessary scheduling operations including the selection of |
---|
562 | * a new heir thread. |
---|
563 | */ |
---|
564 | |
---|
565 | STATIC INLINE void _Thread_Unblock ( |
---|
566 | Thread_Control *the_thread |
---|
567 | ); |
---|
568 | |
---|
569 | /* |
---|
570 | * _Thread_Restart_self |
---|
571 | * |
---|
572 | * DESCRIPTION: |
---|
573 | * |
---|
574 | * This routine resets the current context of the calling thread |
---|
575 | * to that of its initial state. |
---|
576 | */ |
---|
577 | |
---|
578 | STATIC INLINE void _Thread_Restart_self( void ); |
---|
579 | |
---|
580 | /* |
---|
581 | * _Thread_Calculate_heir |
---|
582 | * |
---|
583 | * DESCRIPTION: |
---|
584 | * |
---|
585 | * This function returns a pointer to the highest priority |
---|
586 | * ready thread. |
---|
587 | */ |
---|
588 | |
---|
589 | STATIC INLINE void _Thread_Calculate_heir( void ); |
---|
590 | |
---|
591 | /* |
---|
592 | * _Thread_Is_allocated_fp |
---|
593 | * |
---|
594 | * DESCRIPTION: |
---|
595 | * |
---|
596 | * This function returns TRUE if the floating point context of |
---|
597 | * the_thread is currently loaded in the floating point unit, and |
---|
598 | * FALSE otherwise. |
---|
599 | */ |
---|
600 | |
---|
601 | STATIC INLINE boolean _Thread_Is_allocated_fp ( |
---|
602 | Thread_Control *the_thread |
---|
603 | ); |
---|
604 | |
---|
605 | /* |
---|
606 | * _Thread_Deallocate_fp |
---|
607 | * |
---|
608 | * DESCRIPTION: |
---|
609 | * |
---|
610 | * This routine is invoked when the currently loaded floating |
---|
611 | * point context is now longer associated with an active thread. |
---|
612 | */ |
---|
613 | |
---|
614 | STATIC INLINE void _Thread_Deallocate_fp( void ); |
---|
615 | |
---|
616 | /* |
---|
617 | * _Thread_Disable_dispatch |
---|
618 | * |
---|
619 | * DESCRIPTION: |
---|
620 | * |
---|
621 | * This routine prevents dispatching. |
---|
622 | */ |
---|
623 | |
---|
624 | STATIC INLINE void _Thread_Disable_dispatch( void ); |
---|
625 | |
---|
626 | /* |
---|
627 | * _Thread_Enable_dispatch |
---|
628 | * |
---|
629 | * DESCRIPTION: |
---|
630 | * |
---|
631 | * This routine allows dispatching to occur again. If this is |
---|
632 | * the outer most dispatching critical section, then a dispatching |
---|
633 | * operation will be performed and, if necessary, control of the |
---|
634 | * processor will be transferred to the heir thread. |
---|
635 | */ |
---|
636 | |
---|
637 | #if ( CPU_INLINE_ENABLE_DISPATCH == TRUE ) |
---|
638 | |
---|
639 | STATIC INLINE void _Thread_Enable_dispatch(); |
---|
640 | |
---|
641 | #endif |
---|
642 | |
---|
643 | #if ( CPU_INLINE_ENABLE_DISPATCH == FALSE ) |
---|
644 | |
---|
645 | void _Thread_Enable_dispatch( void ); |
---|
646 | |
---|
647 | #endif |
---|
648 | |
---|
649 | /* |
---|
650 | * _Thread_Unnest_dispatch |
---|
651 | * |
---|
652 | * DESCRIPTION: |
---|
653 | * |
---|
654 | * This routine allows dispatching to occur again. However, |
---|
655 | * no dispatching operation is performed even if this is the outer |
---|
656 | * most dispatching critical section. |
---|
657 | */ |
---|
658 | |
---|
659 | STATIC INLINE void _Thread_Unnest_dispatch( void ); |
---|
660 | |
---|
661 | /* |
---|
662 | * _Thread_Is_dispatching_enabled |
---|
663 | * |
---|
664 | * DESCRIPTION: |
---|
665 | * |
---|
666 | * This function returns TRUE if dispatching is disabled, and FALSE |
---|
667 | * otherwise. |
---|
668 | */ |
---|
669 | |
---|
670 | STATIC INLINE boolean _Thread_Is_dispatching_enabled( void ); |
---|
671 | |
---|
672 | /* |
---|
673 | * _Thread_Is_context_switch_necessary |
---|
674 | * |
---|
675 | * DESCRIPTION: |
---|
676 | * |
---|
677 | * This function returns TRUE if dispatching is disabled, and FALSE |
---|
678 | * otherwise. |
---|
679 | */ |
---|
680 | |
---|
681 | STATIC INLINE boolean _Thread_Is_context_switch_necessary( void ); |
---|
682 | |
---|
683 | /* |
---|
684 | * _Thread_Is_null |
---|
685 | * |
---|
686 | * DESCRIPTION: |
---|
687 | * |
---|
688 | * This function returns TRUE if the_thread is NULL and FALSE otherwise. |
---|
689 | */ |
---|
690 | |
---|
691 | STATIC INLINE boolean _Thread_Is_null ( |
---|
692 | Thread_Control *the_thread |
---|
693 | ); |
---|
694 | |
---|
695 | /* |
---|
696 | * _Thread_Get |
---|
697 | * |
---|
698 | * DESCRIPTION: |
---|
699 | * |
---|
700 | * This function maps thread IDs to thread control |
---|
701 | * blocks. If ID corresponds to a local thread, then it |
---|
702 | * returns the_thread control pointer which maps to ID |
---|
703 | * and location is set to OBJECTS_LOCAL. If the thread ID is |
---|
704 | * global and resides on a remote node, then location is set |
---|
705 | * to OBJECTS_REMOTE, and the_thread is undefined. |
---|
706 | * Otherwise, location is set to OBJECTS_ERROR and |
---|
707 | * the_thread is undefined. |
---|
708 | */ |
---|
709 | |
---|
710 | STATIC INLINE Thread_Control *_Thread_Get ( |
---|
711 | Objects_Id id, |
---|
712 | Objects_Locations *location |
---|
713 | ); |
---|
714 | |
---|
715 | #include <rtems/thread.inl> |
---|
716 | #include <rtems/threadmp.h> |
---|
717 | |
---|
718 | #ifdef __cplusplus |
---|
719 | } |
---|
720 | #endif |
---|
721 | |
---|
722 | #endif |
---|
723 | /* end of include file */ |
---|