ipc.c 47.7 KB
Newer Older
1 2 3
/*
 * File      : ipc.c
 * This file is part of RT-Thread RTOS
B
bernard.xiong 已提交
4
 * COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
5 6 7
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
B
bernard.xiong 已提交
8
 * http://www.rt-thread.org/license/LICENSE
9 10 11 12 13
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-03-14     Bernard      the first version
 * 2006-04-25     Bernard      implement semaphore
14
 * 2006-05-03     Bernard      add RT_IPC_DEBUG
15 16 17 18 19 20 21 22 23 24
 *                             modify the type of IPC waiting time to rt_int32_t
 * 2006-05-10     Bernard      fix the semaphore take bug and add IPC object
 * 2006-05-12     Bernard      implement mailbox and message queue
 * 2006-05-20     Bernard      implement mutex
 * 2006-05-23     Bernard      implement fast event
 * 2006-05-24     Bernard      implement event
 * 2006-06-03     Bernard      fix the thread timer init bug
 * 2006-06-05     Bernard      fix the mutex release bug
 * 2006-06-07     Bernard      fix the message queue send bug
 * 2006-08-04     Bernard      add hook support
B
bernard.xiong 已提交
25
 * 2009-05-21     Yi.qiu       fix the sem release bug
26 27
 * 2009-07-18     Bernard      fix the event clear bug
 * 2009-09-09     Bernard      remove fast event and fix ipc release bug
28
 * 2009-10-10     Bernard      change semaphore and mutex value to unsigned value
B
bernard.xiong 已提交
29
 * 2009-10-25     Bernard      change the mb/mq receive timeout to 0 if the
30
 *                             re-calculated delta tick is a negative number.
B
bernard.xiong 已提交
31
 * 2009-12-16     Bernard      fix the rt_ipc_object_suspend issue when IPC flag
32
 *                             is RT_IPC_FLAG_PRIO
33
 * 2010-01-20     mbbill       remove rt_ipc_object_decrease function.
34
 * 2010-04-20     Bernard      move memcpy outside interrupt disable in mq
qiuyiuestc's avatar
qiuyiuestc 已提交
35
 * 2010-10-26     yi.qiu       add module support in rt_mp_delete and rt_mq_delete
36
 * 2010-11-10     Bernard      add IPC reset command implementation.
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
 */

#include <rtthread.h>
#include <rthw.h>

#include "kservice.h"

#ifdef RT_USING_HOOK
extern void (*rt_object_trytake_hook)(struct rt_object* object);
extern void (*rt_object_take_hook)(struct rt_object* object);
extern void (*rt_object_put_hook)(struct rt_object* object);
#endif

/**
 * @addtogroup IPC
 */

/*@{*/

/**
 * This function will initialize an IPC object
 *
 * @param ipc the IPC object
 *
 * @return the operation status, RT_EOK on successful
 */
rt_inline rt_err_t rt_ipc_object_init(struct rt_ipc_object *ipc)
{
	/* init ipc object */
	rt_list_init(&(ipc->suspend_thread));

	return RT_EOK;
}

/**
72 73
 * This function will suspend a thread to a specified list. IPC object or some double-queue
 * object (mailbox etc.) contains this kind of list.
74 75 76 77 78 79
 *
 * @param ipc the IPC object
 * @param thread the thread object to be suspended
 *
 * @return the operation status, RT_EOK on successful
 */
80
rt_inline rt_err_t rt_ipc_list_suspend(rt_list_t *list, struct rt_thread *thread, rt_uint8_t flag)
81 82 83 84
{
	/* suspend thread */
	rt_thread_suspend(thread);

85
	switch (flag)
86 87
	{
	case RT_IPC_FLAG_FIFO:
88
		rt_list_insert_before(list, &(thread->tlist));
89 90 91 92 93 94 95 96
		break;

	case RT_IPC_FLAG_PRIO:
		{
			struct rt_list_node* n;
			struct rt_thread* sthread;

			/* find a suitable position */
97
			for (n = list->next; n != list; n = n->next)
98 99 100 101
			{
				sthread = rt_list_entry(n, struct rt_thread, tlist);

				/* find out */
102 103 104 105 106 107
				if (thread->current_priority < sthread->current_priority)
				{
					/* insert this thread before the sthread */
					rt_list_insert_before(&(sthread->tlist), &(thread->tlist));
					break;
				}
108
			}
B
bernard.xiong 已提交
109 110

			/* not found a suitable position, append to the end of suspend_thread list */
111 112
			if (n == list)
				rt_list_insert_before(list, &(thread->tlist));
113 114 115 116 117 118 119 120
		}
		break;
	}

	return RT_EOK;
}

/**
121
 * This function will resume the first thread in the list of a IPC object:
122 123 124
 * - remove the thread from suspend queue of IPC object
 * - put the thread into system ready queue
 *
125
 * @param list the thread list
126 127 128
 *
 * @return the operation status, RT_EOK on successful
 */
129
rt_inline rt_err_t rt_ipc_list_resume(rt_list_t *list)
130 131 132 133
{
	struct rt_thread *thread;

	/* get thread entry */
134
	thread = rt_list_entry(list->next, struct rt_thread, tlist);
135

136
	RT_DEBUG_LOG(RT_DEBUG_IPC,("resume thread:%s\n", thread->name));
137 138 139 140 141 142 143 144

	/* resume it */
	rt_thread_resume(thread);

	return RT_EOK;
}

/**
145 146
 * This function will resume all suspended threads in a list, including
 * suspend list of IPC object and private list of mailbox etc.
147
 *
148
 * @param list of the threads to resume
149 150 151
 *
 * @return the operation status, RT_EOK on successful
 */
152
rt_inline rt_err_t rt_ipc_list_resume_all(rt_list_t *list)
153 154 155 156 157
{
	struct rt_thread* thread;
	register rt_ubase_t temp;

	/* wakeup all suspend threads */
158
	while (!rt_list_isempty(list))
159 160 161 162 163
	{
		/* disable interrupt */
		temp = rt_hw_interrupt_disable();

		/* get next suspend thread */
164
		thread = rt_list_entry(list->next, struct rt_thread, tlist);
165 166 167 168 169 170 171 172
		/* set error code to RT_ERROR */
		thread->error = -RT_ERROR;

		/*
		 * resume thread
		 * In rt_thread_resume function, it will remove current thread from
		 * suspend list
		 */
173
		rt_thread_resume(thread);
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);
	}

	return RT_EOK;
}

#ifdef RT_USING_SEMAPHORE

/**
 * This function will initialize a semaphore and put it under control of resource
 * management.
 *
 * @param sem the semaphore object
 * @param name the name of semaphore
 * @param value the init value of semaphore
 * @param flag the flag of semaphore
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_sem_init (rt_sem_t sem, const char* name, rt_uint32_t value, rt_uint8_t flag)
{
	RT_ASSERT(sem != RT_NULL);

	/* init object */
	rt_object_init(&(sem->parent.parent), RT_Object_Class_Semaphore, name);

	/* init ipc object */
	rt_ipc_object_init(&(sem->parent));

	/* set init value */
	sem->value	= value;

	/* set parent */
	sem->parent.parent.flag = flag;

	return RT_EOK;
}

/**
 * This function will detach a semaphore from resource management
 *
 * @param sem the semaphore object
 *
 * @return the operation status, RT_EOK on successful
 *
 * @see rt_sem_delete
 */
rt_err_t rt_sem_detach (rt_sem_t sem)
{
	RT_ASSERT(sem != RT_NULL);

	/* wakeup all suspend threads */
228
	rt_ipc_list_resume_all(&(sem->parent.suspend_thread));
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251

	/* detach semaphore object */
	rt_object_detach(&(sem->parent.parent));

	return RT_EOK;
}

#ifdef RT_USING_HEAP
/**
 * This function will create a semaphore from system resource
 *
 * @param name the name of semaphore
 * @param value the init value of semaphore
 * @param flag the flag of semaphore
 *
 * @return the created semaphore, RT_NULL on error happen
 *
 * @see rt_sem_init
 */
rt_sem_t rt_sem_create (const char* name, rt_uint32_t value, rt_uint8_t flag)
{
	rt_sem_t sem;

252
	RT_DEBUG_NOT_IN_INTERRUPT;
253

254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
	/* allocate object */
	sem = (rt_sem_t) rt_object_allocate(RT_Object_Class_Semaphore, name);
	if (sem == RT_NULL) return sem;

	/* init ipc object */
	rt_ipc_object_init(&(sem->parent));

	/* set init value */
	sem->value	= value;

	/* set parent */
	sem->parent.parent.flag = flag;

	return sem;
}

/**
 * This function will delete a semaphore object and release the memory
 *
 * @param sem the semaphore object
 *
 * @return the error code
 *
 * @see rt_sem_detach
 */
rt_err_t rt_sem_delete (rt_sem_t sem)
{
281
	RT_DEBUG_NOT_IN_INTERRUPT;
282

283 284 285
	RT_ASSERT(sem != RT_NULL);

	/* wakeup all suspend threads */
286
	rt_ipc_list_resume_all(&(sem->parent.suspend_thread));
287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310

	/* delete semaphore object */
	rt_object_delete(&(sem->parent.parent));

	return RT_EOK;
}
#endif

/**
 * This function will take a semaphore, if the semaphore is unavailable, the
 * thread shall wait for a specified time.
 *
 * @param sem the semaphore object
 * @param time the waiting time
 *
 * @return the error code
 */
rt_err_t rt_sem_take (rt_sem_t sem, rt_int32_t time)
{
	register rt_base_t temp;
	struct rt_thread* thread;

	RT_ASSERT(sem != RT_NULL);

311
	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(sem->parent.parent)));
312 313 314 315

	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

316 317 318 319
	RT_DEBUG_LOG(RT_DEBUG_IPC,
		("thread %s take sem:%s, which value is: %d\n", rt_thread_self()->name,
		((struct rt_object*)sem)->name, sem->value));

320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
	if (sem->value > 0)
	{
		/* semaphore is available */
		sem->value --;

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);
	}
	else
	{
		/* no waiting, return with timeout */
		if (time == 0 )
		{
			rt_hw_interrupt_enable(temp);
			return -RT_ETIMEOUT;
		}
		else
		{
338 339
			/* current context checking */
			RT_DEBUG_NOT_IN_INTERRUPT;
340

341 342 343 344 345 346 347
			/* semaphore is unavailable, push to suspend list */
			/* get current thread */
			thread = rt_thread_self();

			/* reset thread error number */
			thread->error = RT_EOK;

348 349
			RT_DEBUG_LOG(RT_DEBUG_IPC,
				("sem take: suspend thread - %s\n", thread->name));
350 351

			/* suspend thread */
352 353
			rt_ipc_list_suspend(&(sem->parent.suspend_thread),
				thread, sem->parent.parent.flag);
354 355 356 357

			/* has waiting time, start thread timer */
			if (time > 0)
			{
358 359
				RT_DEBUG_LOG(RT_DEBUG_IPC,("set thread:%s to timer list\n", thread->name));

360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377
				/* reset the timeout of thread timer and start it */
				rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &time);
				rt_timer_start(&(thread->thread_timer));
			}

			/* enable interrupt */
			rt_hw_interrupt_enable(temp);

			/* do schedule */
			rt_schedule();

			if (thread->error != RT_EOK)
			{
				return thread->error;
			}
		}
	}

378
	RT_OBJECT_HOOK_CALL(rt_object_take_hook, (&(sem->parent.parent)));
379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405

	return RT_EOK;
}

/**
 * This function will try to take a semaphore and immediately return
 *
 * @param sem the semaphore object
 *
 * @return the error code
 */
rt_err_t rt_sem_trytake(rt_sem_t sem)
{
	return rt_sem_take(sem, 0);
}

/**
 * This function will release a semaphore, if there are threads suspended on
 * semaphore, it will be waked up.
 *
 * @param sem the semaphore object
 *
 * @return the error code
 */
rt_err_t rt_sem_release(rt_sem_t sem)
{
	register rt_base_t temp;
406
	register rt_bool_t need_schedule;
407

408
	RT_OBJECT_HOOK_CALL(rt_object_put_hook, (&(sem->parent.parent)));
409

410 411
	need_schedule = RT_FALSE;

412 413 414
	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

415 416 417 418
	RT_DEBUG_LOG(RT_DEBUG_IPC,
		("thread %s releases sem:%s, which value is: %d\n", rt_thread_self()->name,
		((struct rt_object*)sem)->name, sem->value));

419

M
mbbill 已提交
420
	if ( !rt_list_isempty(&sem->parent.suspend_thread) )
421
	{
422
		/* resume the suspended thread */
423
		rt_ipc_list_resume(&(sem->parent.suspend_thread));
424
		need_schedule = RT_TRUE;
425
	}
426
	else sem->value ++; /* increase value */
427 428 429 430

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

431 432 433
	/* resume a thread, re-schedule */
	if (need_schedule == RT_TRUE) rt_schedule();

434 435 436 437 438 439 440 441 442 443 444 445 446 447
	return RT_EOK;
}

/**
 * This function can get or set some extra attributions of a semaphore object.
 *
 * @param sem the semaphore object
 * @param cmd the execution command
 * @param arg the execution argument
 *
 * @return the error code
 */
rt_err_t rt_sem_control(rt_sem_t sem, rt_uint8_t cmd, void* arg)
{
448 449 450 451
	rt_ubase_t level;
	RT_ASSERT(sem != RT_NULL);

	if (cmd == RT_IPC_CMD_RESET)
452 453 454 455
	{
		rt_uint32_t value;

		/* get value */
456
		value = (rt_uint32_t)arg;
457 458 459 460
		/* disable interrupt */
		level = rt_hw_interrupt_disable();

		/* resume all waiting thread */
461
		rt_ipc_list_resume_all(&sem->parent.suspend_thread);
462 463

		/* set new value */
464
		sem->value = (rt_uint16_t)value;
465 466 467 468 469 470 471 472

		/* enable interrupt */
		rt_hw_interrupt_enable(level);

		return RT_EOK;
	}

	return -RT_ERROR;
473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523
}

#endif /* end of RT_USING_SEMAPHORE */

#ifdef RT_USING_MUTEX

/**
 * This function will initialize a mutex and put it under control of resource
 * management.
 *
 * @param mutex the mutex object
 * @param name the name of mutex
 * @param flag the flag of mutex
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_mutex_init (rt_mutex_t mutex, const char* name, rt_uint8_t flag)
{
	RT_ASSERT(mutex != RT_NULL);

	/* init object */
	rt_object_init(&(mutex->parent.parent), RT_Object_Class_Mutex, name);

	/* init ipc object */
	rt_ipc_object_init(&(mutex->parent));

	mutex->value = 1;
	mutex->owner = RT_NULL;
	mutex->original_priority = 0xFF;
	mutex->hold  = 0;

	/* set flag */
	mutex->parent.parent.flag = flag;

	return RT_EOK;
}

/**
 * This function will detach a mutex from resource management
 *
 * @param mutex the mutex object
 *
 * @return the operation status, RT_EOK on successful
 *
 * @see rt_mutex_delete
 */
rt_err_t rt_mutex_detach (rt_mutex_t mutex)
{
	RT_ASSERT(mutex != RT_NULL);

	/* wakeup all suspend threads */
524
	rt_ipc_list_resume_all(&(mutex->parent.suspend_thread));
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546

	/* detach semaphore object */
	rt_object_detach(&(mutex->parent.parent));

	return RT_EOK;
}

#ifdef RT_USING_HEAP
/**
 * This function will create a mutex from system resource
 *
 * @param name the name of mutex
 * @param flag the flag of mutex
 *
 * @return the created mutex, RT_NULL on error happen
 *
 * @see rt_mutex_init
 */
rt_mutex_t rt_mutex_create (const char* name, rt_uint8_t flag)
{
	struct rt_mutex *mutex;

547
	RT_DEBUG_NOT_IN_INTERRUPT;
548

549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
	/* allocate object */
	mutex = (rt_mutex_t) rt_object_allocate(RT_Object_Class_Mutex, name);
	if (mutex == RT_NULL) return mutex;

	/* init ipc object */
	rt_ipc_object_init(&(mutex->parent));

	mutex->value = 1;
	mutex->owner = RT_NULL;
	mutex->original_priority = 0xFF;
	mutex->hold  = 0;

	/* set flag */
	mutex->parent.parent.flag = flag;

	return mutex;
}

/**
 * This function will delete a mutex object and release the memory
 *
 * @param mutex the mutex object
 *
 * @return the error code
 *
 * @see rt_mutex_detach
 */
rt_err_t rt_mutex_delete (rt_mutex_t mutex)
{
578
	RT_DEBUG_NOT_IN_INTERRUPT;
579

580 581 582
	RT_ASSERT(mutex != RT_NULL);

	/* wakeup all suspend threads */
583
	rt_ipc_list_resume_all(&(mutex->parent.suspend_thread));
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605

	/* delete semaphore object */
	rt_object_delete(&(mutex->parent.parent));

	return RT_EOK;
}
#endif

/**
 * This function will take a mutex, if the mutex is unavailable, the
 * thread shall wait for a specified time.
 *
 * @param mutex the mutex object
 * @param time the waiting time
 *
 * @return the error code
 */
rt_err_t rt_mutex_take (rt_mutex_t mutex, rt_int32_t time)
{
	register rt_base_t temp;
	struct rt_thread* thread;

606
	/* this function must not be used in interrupt even if time = 0 */
607
	RT_DEBUG_NOT_IN_INTERRUPT;
608

609 610 611 612 613 614 615 616
	RT_ASSERT(mutex != RT_NULL);

	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

	/* get current thread */
	thread = rt_thread_self();

617
	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(mutex->parent.parent)));
618

619 620 621
	RT_DEBUG_LOG(RT_DEBUG_IPC,
		("mutex_take: current thread %s, mutex value: %d, hold: %d\n",
		thread->name, mutex->value, mutex->hold));
622

623 624 625 626 627 628 629 630 631 632
	/* reset thread error */
	thread->error = RT_EOK;

	if (mutex->owner == thread)
	{
		/* it's the same thread */
		mutex->hold ++;
	}
	else
	{
B
bernard.xiong 已提交
633
		/* in initialization status, the value is 1. Therefore, if the
634 635
		 * value is great than 1, which indicates the mutex is avaible.
		 */
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661
		if (mutex->value > 0)
		{
			/* mutex is available */
			mutex->value --;

			/* set mutex owner and original priority */
			mutex->owner = thread;
			mutex->original_priority = thread->current_priority;
			mutex->hold ++;
		}
		else
		{
			/* no waiting, return with timeout */
			if (time == 0 )
			{
				/* set error as timeout */
				thread->error = -RT_ETIMEOUT;

				/* enable interrupt */
				rt_hw_interrupt_enable(temp);

				return -RT_ETIMEOUT;
			}
			else
			{
				/* mutex is unavailable, push to suspend list */
662 663 664
				RT_DEBUG_LOG(RT_DEBUG_IPC,
					("mutex_take: suspend thread: %s\n", thread->name));

665 666 667 668 669 670 671 672 673
				/* change the owner thread priority of mutex */
				if (thread->current_priority < mutex->owner->current_priority)
				{
					/* change the owner thread priority */
					rt_thread_control(mutex->owner, RT_THREAD_CTRL_CHANGE_PRIORITY,
						&thread->current_priority);
				}

				/* suspend current thread */
674 675
				rt_ipc_list_suspend(&(mutex->parent.suspend_thread),
				thread, mutex->parent.parent.flag);
676 677 678 679

				/* has waiting time, start thread timer */
				if (time > 0)
				{
680 681 682
					RT_DEBUG_LOG(RT_DEBUG_IPC,
						("mutex_take: start the timer of thread:%s\n", thread->name));

683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700
					/* reset the timeout of thread timer and start it */
					rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &time);
					rt_timer_start(&(thread->thread_timer));
				}

				/* enable interrupt */
				rt_hw_interrupt_enable(temp);

				/* do schedule */
				rt_schedule();

				if (thread->error != RT_EOK)
				{
					/* return error */
					return thread->error;
				}
				else
				{
701
					/* the mutex is taken successfully. */
702 703 704 705 706 707 708 709 710 711
					/* disable interrupt */
					temp = rt_hw_interrupt_disable();
				}
			}
		}
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

712
	RT_OBJECT_HOOK_CALL(rt_object_take_hook, (&(mutex->parent.parent)));
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728

	return RT_EOK;
}

/**
 * This function will release a mutex, if there are threads suspended on mutex,
 * it will be waked up.
 *
 * @param mutex the mutex object
 *
 * @return the error code
 */
rt_err_t rt_mutex_release(rt_mutex_t mutex)
{
	register rt_base_t temp;
	struct rt_thread* thread;
729
	rt_bool_t need_schedule;
730

731
	need_schedule = RT_FALSE;
732

733 734 735
	/* get current thread */
	thread = rt_thread_self();

736 737 738
	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

739 740 741
	RT_DEBUG_LOG(RT_DEBUG_IPC,
		("mutex_release:current thread %s, mutex value: %d, hold: %d\n",
		thread->name, mutex->value, mutex->hold));
742

743
	RT_OBJECT_HOOK_CALL(rt_object_put_hook, (&(mutex->parent.parent)));
744

745
	/* mutex only can be released by owner */
746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
	if (thread != mutex->owner)
	{
		thread->error = -RT_ERROR;

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		return -RT_ERROR;
	}

	/* decrease hold */
	mutex->hold --;
	/* if no hold */
	if (mutex->hold == 0)
	{
		/* change the owner thread to original priority */
762
		if (mutex->original_priority != mutex->owner->current_priority)
763 764
		{
			rt_thread_control(mutex->owner, RT_THREAD_CTRL_CHANGE_PRIORITY,
765
				&(mutex->original_priority));
766 767
		}

768
		/* wakeup suspended thread */
M
mbbill 已提交
769
		if( !rt_list_isempty(&mutex->parent.suspend_thread) )
770
		{
771
			/* get suspended thread */
772 773
			thread = rt_list_entry(mutex->parent.suspend_thread.next, struct rt_thread, tlist);

774 775 776
			RT_DEBUG_LOG(RT_DEBUG_IPC,
				("mutex_release: resume thread: %s\n", thread->name));

777 778 779 780
			/* set new owner and priority */
			mutex->owner = thread;
			mutex->original_priority = thread->current_priority;
			mutex->hold ++;
781 782

			/* resume thread */
783
			rt_ipc_list_resume(&(mutex->parent.suspend_thread));
784 785

			need_schedule = RT_TRUE;
786
		}
787 788
		else
		{
789 790 791
			/* increase value */
			mutex->value ++;

B
bernard.xiong 已提交
792 793
			/* clear owner */
			mutex->owner = RT_NULL;
794
			mutex->original_priority = 0xff;
795
		}
796 797 798 799 800
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

801 802
	/* perform a schedule */
	if (need_schedule == RT_TRUE) rt_schedule();
B
bernard.xiong 已提交
803

804 805 806 807 808 809 810 811 812 813 814 815 816 817
	return RT_EOK;
}

/**
 * This function can get or set some extra attributions of a mutex object.
 *
 * @param mutex the mutex object
 * @param cmd the execution command
 * @param arg the execution argument
 *
 * @return the error code
 */
rt_err_t rt_mutex_control(rt_mutex_t mutex, rt_uint8_t cmd, void* arg)
{
818
	return -RT_ERROR;
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866
}

#endif /* end of RT_USING_MUTEX */

#ifdef RT_USING_EVENT

/**
 * This function will initialize an event and put it under control of resource
 * management.
 *
 * @param event the event object
 * @param name the name of event
 * @param flag the flag of event
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_event_init(rt_event_t event, const char* name, rt_uint8_t flag)
{
	RT_ASSERT(event != RT_NULL);

	/* init object */
	rt_object_init(&(event->parent.parent), RT_Object_Class_Event, name);

	/* set parent flag */
	event->parent.parent.flag = flag;

	/* init ipc object */
	rt_ipc_object_init(&(event->parent));

	/* init event */
	event->set = 0;

	return RT_EOK;
}

/**
 * This function will detach an event object from resource management
 *
 * @param event the event object
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_event_detach(rt_event_t event)
{
	/* parameter check */
	RT_ASSERT(event != RT_NULL);

	/* resume all suspended thread */
867
	rt_ipc_list_resume_all(&(event->parent.suspend_thread));
868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887

	/* detach event object */
	rt_object_detach(&(event->parent.parent));

	return RT_EOK;
}

#ifdef RT_USING_HEAP
/**
 * This function will create an event object from system resource
 *
 * @param name the name of event
 * @param flag the flag of event
 *
 * @return the created event, RT_NULL on error happen
 */
rt_event_t rt_event_create (const char* name, rt_uint8_t flag)
{
	rt_event_t event;

888
	RT_DEBUG_NOT_IN_INTERRUPT;
889

890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917
	/* allocate object */
	event = (rt_event_t) rt_object_allocate(RT_Object_Class_Event, name);
	if (event == RT_NULL) return event;

	/* set parent */
	event->parent.parent.flag = flag;

	/* init ipc object */
	rt_ipc_object_init(&(event->parent));

	/* init event */
	event->set = 0;

	return event;
}

/**
 * This function will delete an event object and release the memory
 *
 * @param event the event object
 *
 * @return the error code
 */
rt_err_t rt_event_delete (rt_event_t event)
{
	/* parameter check */
	RT_ASSERT(event != RT_NULL);

918
	RT_DEBUG_NOT_IN_INTERRUPT;
919

920
	/* resume all suspended thread */
921
	rt_ipc_list_resume_all(&(event->parent.suspend_thread));
922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944

	/* delete event object */
	rt_object_delete(&(event->parent.parent));

	return RT_EOK;
}
#endif

/**
 * This function will send an event to the event object, if there are threads
 * suspended on event object, it will be waked up.
 *
 * @param event the event object
 * @param set the event set
 *
 * @return the error code
 */
rt_err_t rt_event_send(rt_event_t event, rt_uint32_t set)
{
	struct rt_list_node *n;
	struct rt_thread *thread;
	register rt_ubase_t level;
	register rt_base_t status;
B
bernard.xiong 已提交
945
	rt_bool_t need_schedule;
946 947 948 949 950

	/* parameter check */
	RT_ASSERT(event != RT_NULL);
	if (set == 0) return -RT_ERROR;

B
bernard.xiong 已提交
951
	need_schedule = RT_FALSE;
952
	RT_OBJECT_HOOK_CALL(rt_object_put_hook, (&(event->parent.parent)));
953 954 955 956 957 958

	/* disable interrupt */
	level = rt_hw_interrupt_disable();

	/* set event */
	event->set |= set;
959

M
mbbill 已提交
960
	if( !rt_list_isempty(&event->parent.suspend_thread) )
961 962 963 964 965 966 967 968 969 970 971 972 973
	{
		/* search thread list to resume thread */
		n = event->parent.suspend_thread.next;
		while (n != &(event->parent.suspend_thread))
		{
			/* get thread */
			thread = rt_list_entry(n, struct rt_thread, tlist);

			status = -RT_ERROR;
			if (thread->event_info & RT_EVENT_FLAG_AND)
			{
				if ((thread->event_set & event->set) == thread->event_set)
				{
974
					/* received an AND event */
975 976 977 978 979 980 981
					status = RT_EOK;
				}
			}
			else if (thread->event_info & RT_EVENT_FLAG_OR)
			{
				if (thread->event_set & event->set)
				{
982 983 984 985
					/* save recieved event set */
					thread->event_set = thread->event_set & event->set;

					/* received an OR event */
986 987 988 989
					status = RT_EOK;
				}
			}

B
bernard.xiong 已提交
990
			/* move node to the next */
991 992 993 994 995
			n = n->next;

			/* condition is satisfied, resume thread */
			if (status == RT_EOK)
			{
996 997 998 999
				/* clear event */
				if (thread->event_info & RT_EVENT_FLAG_CLEAR)
					event->set &= ~thread->event_set;

1000 1001 1002
				/* resume thread, and thread list breaks out */
				rt_thread_resume(thread);

B
bernard.xiong 已提交
1003 1004 1005
				/* need do a scheduling */
				need_schedule = RT_TRUE;

1006 1007 1008 1009 1010 1011 1012 1013
			}
		}
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(level);

	/* do a schedule */
B
bernard.xiong 已提交
1014
	if (need_schedule == RT_TRUE)
1015
		rt_schedule();
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037

	return RT_EOK;
}

/**
 * This function will receive an event from event object, if the event is unavailable,
 * the thread shall wait for a specified time.
 *
 * @param event the fast event object
 * @param set the interested event set
 * @param option the receive option
 * @param timeout the waiting time
 * @param recved the received event
 *
 * @return the error code
 */
rt_err_t rt_event_recv(rt_event_t event, rt_uint32_t set, rt_uint8_t option, rt_int32_t timeout, rt_uint32_t* recved)
{
	struct rt_thread *thread;
	register rt_ubase_t level;
	register rt_base_t status;

1038
	RT_DEBUG_NOT_IN_INTERRUPT;
1039

1040 1041 1042 1043 1044 1045
	/* parameter check */
	RT_ASSERT(event != RT_NULL);
	if (set == 0) return -RT_ERROR;

	/* init status */
	status = -RT_ERROR;
B
bernard.xiong 已提交
1046 1047 1048 1049
	/* get current thread */
	thread = rt_thread_self();
	/* reset thread error */
	thread->error = RT_EOK;
1050

1051
	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(event->parent.parent)));
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068

	/* disable interrupt */
	level = rt_hw_interrupt_disable();

	/* check event set */
	if (option & RT_EVENT_FLAG_AND)
	{
		if ((event->set & set) == set) status = RT_EOK;
	}
	else if (option & RT_EVENT_FLAG_OR)
	{
		if (event->set & set) status = RT_EOK;
	}

	if (status == RT_EOK)
	{
		/* set received event */
1069
		*recved = (event->set & set);
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085

		/* received event */
		if (option & RT_EVENT_FLAG_CLEAR) event->set &= ~set;
	}
	else if (timeout == 0)
	{
		/* no waiting */
		thread->error = -RT_ETIMEOUT;
	}
	else
	{
		/* fill thread event info */
		thread->event_set  = set;
		thread->event_info = option;

		/* put thread to suspended thread list */
1086 1087
		rt_ipc_list_suspend(&(event->parent.suspend_thread),
				thread, event->parent.parent.flag);
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104

		/* if there is a waiting timeout, active thread timer */
		if (timeout > 0)
		{
			/* reset the timeout of thread timer and start it */
			rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &timeout);
			rt_timer_start(&(thread->thread_timer));
		}

		/* enable interrupt */
		rt_hw_interrupt_enable(level);

		/* do a schedule */
		rt_schedule();

		if (thread->error != RT_EOK)
		{
1105
		    /* return error */
1106 1107 1108
			return thread->error;
		}

1109
		/* received an event, disable interrupt to protect */
1110 1111
		level = rt_hw_interrupt_disable();

1112 1113
		/* set received event */
		*recved = thread->event_set;
1114 1115 1116 1117 1118
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(level);

1119
	RT_OBJECT_HOOK_CALL(rt_object_take_hook, (&(event->parent.parent)));
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134

	return thread->error;
}

/**
 * This function can get or set some extra attributions of an event object.
 *
 * @param event the event object
 * @param cmd the execution command
 * @param arg the execution argument
 *
 * @return the error code
 */
rt_err_t rt_event_control (rt_event_t event, rt_uint8_t cmd, void* arg)
{
1135 1136 1137 1138 1139 1140 1141 1142 1143
	rt_ubase_t level;
	RT_ASSERT(event != RT_NULL);

	if (cmd == RT_IPC_CMD_RESET)
	{
		/* disable interrupt */
		level = rt_hw_interrupt_disable();

		/* resume all waiting thread */
1144
		rt_ipc_list_resume_all(&event->parent.suspend_thread);
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155

		/* init event set */
		event->set = 0;

		/* enable interrupt */
		rt_hw_interrupt_enable(level);

		return RT_EOK;
	}

	return -RT_ERROR;
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193
}

#endif /* end of RT_USING_EVENT */

#ifdef RT_USING_MAILBOX

/**
 * This function will initialize a mailbox and put it under control of resource
 * management.
 *
 * @param mb the mailbox object
 * @param name the name of mailbox
 * @param msgpool the begin address of buffer to save received mail
 * @param size the size of mailbox
 * @param flag the flag of mailbox
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_mb_init(rt_mailbox_t mb, const char* name, void* msgpool, rt_size_t size, rt_uint8_t flag)
{
	RT_ASSERT(mb != RT_NULL);

	/* init object */
	rt_object_init(&(mb->parent.parent), RT_Object_Class_MailBox, name);

	/* set parent flag */
	mb->parent.parent.flag = flag;

	/* init ipc object */
	rt_ipc_object_init(&(mb->parent));

	/* init mailbox */
	mb->msg_pool = msgpool;
	mb->size 	 = size;
	mb->entry 	 	= 0;
	mb->in_offset 	= 0;
	mb->out_offset 	= 0;

1194
	/* init an additional list of sender suspend thread */
1195 1196
	rt_list_init(&(mb->suspend_sender_thread));

1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212
	return RT_EOK;
}

/**
 * This function will detach a mailbox from resource management
 *
 * @param mb the mailbox object
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_mb_detach(rt_mailbox_t mb)
{
	/* parameter check */
	RT_ASSERT(mb != RT_NULL);

	/* resume all suspended thread */
1213 1214 1215
	rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
	/* also resume all mailbox private suspended thread */
	rt_ipc_list_resume_all(&(mb->suspend_sender_thread));
1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236

	/* detach mailbox object */
	rt_object_detach(&(mb->parent.parent));

	return RT_EOK;
}

#ifdef RT_USING_HEAP
/**
 * This function will create a mailbox object from system resource
 *
 * @param name the name of mailbox
 * @param size the size of mailbox
 * @param flag the flag of mailbox
 *
 * @return the created mailbox, RT_NULL on error happen
 */
rt_mailbox_t rt_mb_create (const char* name, rt_size_t size, rt_uint8_t flag)
{
	rt_mailbox_t mb;

1237
	RT_DEBUG_NOT_IN_INTERRUPT;
1238

1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262
	/* allocate object */
	mb = (rt_mailbox_t) rt_object_allocate(RT_Object_Class_MailBox, name);
	if (mb == RT_NULL) return mb;

	/* set parent */
	mb->parent.parent.flag = flag;

	/* init ipc object */
	rt_ipc_object_init(&(mb->parent));

	/* init mailbox */
	mb->size 	 	= size;
	mb->msg_pool 	= rt_malloc(mb->size * sizeof(rt_uint32_t));
	if (mb->msg_pool == RT_NULL)
	{
		/* delete mailbox object */
		rt_object_delete(&(mb->parent.parent));

		return RT_NULL;
	}
	mb->entry  = 0;
	mb->in_offset 	= 0;
	mb->out_offset 	= 0;

1263 1264 1265
	/* init an additional list of sender suspend thread */
	rt_list_init(&(mb->suspend_sender_thread));

1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
	return mb;
}

/**
 * This function will delete a mailbox object and release the memory
 *
 * @param mb the mailbox object
 *
 * @return the error code
 */
rt_err_t rt_mb_delete (rt_mailbox_t mb)
M
mbbill@gmail.com 已提交
1277
{
1278
	RT_DEBUG_NOT_IN_INTERRUPT;
1279

1280 1281 1282 1283
	/* parameter check */
	RT_ASSERT(mb != RT_NULL);

	/* resume all suspended thread */
1284
	rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
1285

1286 1287
	/* also resume all mailbox private suspended thread */
	rt_ipc_list_resume_all(&(mb->suspend_sender_thread));
1288

qiuyiuestc's avatar
qiuyiuestc 已提交
1289
#if defined(RT_USING_MODULE) && defined(RT_USING_SLAB)
qiuyiuestc's avatar
qiuyiuestc 已提交
1290
	/* the mb object belongs to an application module */
1291
	if(mb->parent.parent.flag & RT_OBJECT_FLAG_MODULE)
qiuyiuestc's avatar
qiuyiuestc 已提交
1292 1293 1294 1295
		rt_module_free(mb->parent.parent.module_id, mb->msg_pool);
	else
#endif

1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
	/* free mailbox pool */
	rt_free(mb->msg_pool);

	/* delete mailbox object */
	rt_object_delete(&(mb->parent.parent));

	return RT_EOK;
}
#endif

/**
1307 1308
 * This function will send a mail to mailbox object. If the mailbox is full,
 * current thread will be suspended until timeout.
1309 1310 1311
 *
 * @param mb the mailbox object
 * @param value the mail
1312
 * @param timeout the waiting time
1313 1314 1315
 *
 * @return the error code
 */
1316
rt_err_t rt_mb_send_wait (rt_mailbox_t mb, rt_uint32_t value, rt_int32_t timeout)
1317
{
1318
	struct rt_thread *thread;
1319
	register rt_ubase_t temp;
1320
	rt_uint32_t tick_delta;
1321 1322 1323 1324

	/* parameter check */
	RT_ASSERT(mb != RT_NULL);

1325
	RT_OBJECT_HOOK_CALL(rt_object_put_hook, (&(mb->parent.parent)));
1326 1327 1328 1329

	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

1330 1331 1332 1333 1334 1335 1336 1337 1338
	/* for non-blocking call */
	if (mb->entry == mb->size && timeout == 0)
	{
		rt_hw_interrupt_enable(temp);
		return -RT_EFULL;
	}

	tick_delta = 0;

1339 1340 1341
	/* get current thread */
	thread = rt_thread_self();

1342
	/* mailbox is full */
1343
	while (mb->entry == mb->size)
1344
	{
1345 1346
		RT_DEBUG_NOT_IN_INTERRUPT;

1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358
		/* reset error number in thread */
		thread->error = RT_EOK;

		/* no waiting, return timeout */
		if (timeout == 0)
		{
            /* enable interrupt */
            rt_hw_interrupt_enable(temp);

            thread->error = -RT_EFULL;
            return -RT_EFULL;
        }
1359
	
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
		/* suspend current thread */
		rt_ipc_list_suspend(&(mb->suspend_sender_thread),
				thread, mb->parent.parent.flag);

		/* has waiting time, start thread timer */
		if (timeout > 0)
		{
			/* get the start tick of timer */
			tick_delta = rt_tick_get();

1370 1371 1372
			RT_DEBUG_LOG(RT_DEBUG_IPC,
				("mb_send_wait: start timer of thread:%s\n", thread->name));

1373 1374 1375 1376 1377
			/* reset the timeout of thread timer and start it */
			rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &timeout);
			rt_timer_start(&(thread->thread_timer));
		}

1378 1379 1380
		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
		/* re-schedule */
		rt_schedule();

		/* resume from suspend state */
		if (thread->error != RT_EOK)
		{
		    /* return error */
			return thread->error;
		}

		/* disable interrupt */
		temp = rt_hw_interrupt_disable();

		/* re-calculate timeout tick */
		if (timeout > 0)
		{
			tick_delta = rt_tick_get() - tick_delta;
			timeout -= tick_delta;
			if (timeout < 0) timeout = 0;
		}
1401 1402
	}

1403

1404 1405 1406 1407
	/* set ptr */
	mb->msg_pool[mb->in_offset] = value;
	/* increase input offset */
	++ mb->in_offset;
M
mbbill@gmail.com 已提交
1408
	if (mb->in_offset >= mb->size) mb->in_offset = 0;
1409 1410 1411
	/* increase message entry */
	mb->entry ++;

1412
	/* resume suspended thread */
M
mbbill 已提交
1413
	if( !rt_list_isempty(&mb->parent.suspend_thread) )
1414
	{
1415
		rt_ipc_list_resume(&(mb->parent.suspend_thread));
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		rt_schedule();
		return RT_EOK;
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

	return RT_EOK;
}

1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444
/**
 * This function will send a mail to mailbox object, if there are threads suspended
 * on mailbox object, it will be waked up. This function will return immediately, if
 * you want blocking send, use rt_mb_send_wait instead.
 *
 * @param mb the mailbox object
 * @param value the mail
 *
 * @return the error code
 */
rt_err_t rt_mb_send (rt_mailbox_t mb, rt_uint32_t value)
{
	return rt_mb_send_wait(mb,value,0);
}

1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
/**
 * This function will receive a mail from mailbox object, if there is no mail in
 * mailbox object, the thread shall wait for a specified time.
 *
 * @param mb the mailbox object
 * @param value the received mail will be saved in
 * @param timeout the waiting time
 *
 * @return the error code
 */
rt_err_t rt_mb_recv (rt_mailbox_t mb, rt_uint32_t* value, rt_int32_t timeout)
{
	struct rt_thread *thread;
	register rt_ubase_t temp;
1459
	rt_uint32_t tick_delta;
1460 1461 1462 1463

	/* parameter check */
	RT_ASSERT(mb != RT_NULL);

1464
	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(mb->parent.parent)));
1465 1466 1467 1468

	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

1469 1470 1471 1472 1473 1474 1475 1476 1477
	/* for non-blocking call */
	if (mb->entry == 0 && timeout == 0)
	{
		rt_hw_interrupt_enable(temp);
		return -RT_ETIMEOUT;
	}

	tick_delta = 0;

1478 1479 1480
	/* get current thread */
	thread = rt_thread_self();

1481
	/* mailbox is empty */
1482
	while (mb->entry == 0)
1483
	{
1484 1485
		RT_DEBUG_NOT_IN_INTERRUPT;

1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499
		/* reset error number in thread */
		thread->error = RT_EOK;

		/* no waiting, return timeout */
		if (timeout == 0)
		{
			/* enable interrupt */
			rt_hw_interrupt_enable(temp);

			thread->error = -RT_ETIMEOUT;
			return -RT_ETIMEOUT;
		}

		/* suspend current thread */
1500 1501
		rt_ipc_list_suspend(&(mb->parent.suspend_thread),
				thread, mb->parent.parent.flag);
1502 1503 1504 1505

		/* has waiting time, start thread timer */
		if (timeout > 0)
		{
1506 1507 1508
			/* get the start tick of timer */
			tick_delta = rt_tick_get();

1509 1510 1511
			RT_DEBUG_LOG(RT_DEBUG_IPC,
				("mb_recv: start timer of thread:%s\n", thread->name));

1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
			/* reset the timeout of thread timer and start it */
			rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &timeout);
			rt_timer_start(&(thread->thread_timer));
		}

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		/* re-schedule */
		rt_schedule();

1523
		/* resume from suspend state */
1524 1525
		if (thread->error != RT_EOK)
		{
1526
		    /* return error */
1527 1528 1529 1530 1531
			return thread->error;
		}

		/* disable interrupt */
		temp = rt_hw_interrupt_disable();
1532 1533 1534 1535 1536 1537

		/* re-calculate timeout tick */
		if (timeout > 0)
		{
			tick_delta = rt_tick_get() - tick_delta;
			timeout -= tick_delta;
1538
			if (timeout < 0) timeout = 0;
1539
		}
1540 1541 1542 1543 1544 1545 1546
	}

	/* fill ptr */
	*value = mb->msg_pool[mb->out_offset];

	/* increase output offset */
	++mb->out_offset;
M
mbbill@gmail.com 已提交
1547
	if (mb->out_offset >= mb->size) mb->out_offset = 0;
1548 1549 1550
	/* decrease message entry */
	mb->entry --;

1551 1552 1553 1554 1555 1556 1557 1558
	/* resume suspended thread */
	if( !rt_list_isempty(&(mb->suspend_sender_thread)) )
	{
		rt_ipc_list_resume(&(mb->suspend_sender_thread));

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

1559 1560
		RT_OBJECT_HOOK_CALL(rt_object_take_hook, (&(mb->parent.parent)));

1561 1562 1563 1564 1565
		rt_schedule();

		return RT_EOK;
	}

1566 1567 1568
	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

1569
	RT_OBJECT_HOOK_CALL(rt_object_take_hook, (&(mb->parent.parent)));
1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584

	return RT_EOK;
}

/**
 * This function can get or set some extra attributions of a mailbox object.
 *
 * @param mb the mailbox object
 * @param cmd the execution command
 * @param arg the execution argument
 *
 * @return the error code
 */
rt_err_t rt_mb_control(rt_mailbox_t mb, rt_uint8_t cmd, void* arg)
{
1585 1586 1587 1588 1589 1590 1591 1592 1593
	rt_ubase_t level;
	RT_ASSERT(mb != RT_NULL);

	if (cmd == RT_IPC_CMD_RESET)
	{
		/* disable interrupt */
		level = rt_hw_interrupt_disable();

		/* resume all waiting thread */
1594
		rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
1595

1596 1597 1598
		/* also resume all mailbox private suspended thread */
		rt_ipc_list_resume_all(&(mb->suspend_sender_thread));

1599 1600 1601 1602
		/* re-init mailbox */
		mb->entry 	 	= 0;
		mb->in_offset 	= 0;
		mb->out_offset 	= 0;
1603

1604 1605 1606 1607 1608 1609 1610
		/* enable interrupt */
		rt_hw_interrupt_enable(level);

		return RT_EOK;
	}

	return -RT_ERROR;
1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691
}

#endif /* end of RT_USING_MAILBOX */

#ifdef RT_USING_MESSAGEQUEUE

struct rt_mq_message
{
	struct rt_mq_message* next;
};

/**
 * This function will initialize a message queue and put it under control of resource
 * management.
 *
 * @param mq the message object
 * @param name the name of message queue
 * @param msgpool the beginning address of buffer to save messages
 * @param msg_size the maximum size of message
 * @param pool_size the size of buffer to save messages
 * @param flag the flag of message queue
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_mq_init(rt_mq_t mq, const char* name, void *msgpool, rt_size_t msg_size, rt_size_t pool_size, rt_uint8_t flag)
{
	struct rt_mq_message* head;
	register rt_base_t temp;

	/* parameter check */
	RT_ASSERT(mq != RT_NULL);

	/* init object */
	rt_object_init(&(mq->parent.parent), RT_Object_Class_MessageQueue, name);

	/* set parent flag */
	mq->parent.parent.flag = flag;

	/* init ipc object */
	rt_ipc_object_init(&(mq->parent));

	/* set messasge pool */
	mq->msg_pool 	= msgpool;

	/* get correct message size */
	mq->msg_size	= RT_ALIGN(msg_size,  RT_ALIGN_SIZE);
	mq->max_msgs	= pool_size / (mq->msg_size + sizeof(struct rt_mq_message));

	/* init message list */
	mq->msg_queue_head = RT_NULL;
	mq->msg_queue_tail = RT_NULL;

	/* init message empty list */
	mq->msg_queue_free = RT_NULL;
	for (temp = 0; temp < mq->max_msgs; temp ++)
	{
		head = (struct rt_mq_message*)((rt_uint8_t*)mq->msg_pool +
			temp * (mq->msg_size + sizeof(struct rt_mq_message)));
		head->next = mq->msg_queue_free;
		mq->msg_queue_free = head;
	}

	/* the initial entry is zero */
	mq->entry		= 0;

	return RT_EOK;
}

/**
 * This function will detach a message queue object from resource management
 *
 * @param mq the message queue object
 *
 * @return the operation status, RT_EOK on successful
 */
rt_err_t rt_mq_detach(rt_mq_t mq)
{
	/* parameter check */
	RT_ASSERT(mq != RT_NULL);

	/* resume all suspended thread */
1692
	rt_ipc_list_resume_all(&mq->parent.suspend_thread);
1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716

	/* detach message queue object */
	rt_object_detach(&(mq->parent.parent));

	return RT_EOK;
}

#ifdef RT_USING_HEAP
/**
 * This function will create a message queue object from system resource
 *
 * @param name the name of message queue
 * @param msg_size the size of message
 * @param max_msgs the maximum number of message in queue
 * @param flag the flag of message queue
 *
 * @return the created message queue, RT_NULL on error happen
 */
rt_mq_t rt_mq_create (const char* name, rt_size_t msg_size, rt_size_t max_msgs, rt_uint8_t flag)
{
	struct rt_messagequeue* mq;
	struct rt_mq_message* head;
	register rt_base_t temp;

1717
	RT_DEBUG_NOT_IN_INTERRUPT;
1718

1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771
	/* allocate object */
	mq = (rt_mq_t) rt_object_allocate(RT_Object_Class_MessageQueue, name);
	if (mq == RT_NULL) return mq;

	/* set parent */
	mq->parent.parent.flag = flag;

	/* init ipc object */
	rt_ipc_object_init(&(mq->parent));

	/* init message queue */

	/* get correct message size */
	mq->msg_size	= RT_ALIGN(msg_size, RT_ALIGN_SIZE);
	mq->max_msgs	= max_msgs;

	/* allocate message pool */
	mq->msg_pool 	= rt_malloc((mq->msg_size + sizeof(struct rt_mq_message))* mq->max_msgs);
	if (mq->msg_pool == RT_NULL)
	{
		rt_mq_delete(mq);
		return RT_NULL;
	}

	/* init message list */
	mq->msg_queue_head = RT_NULL;
	mq->msg_queue_tail = RT_NULL;

	/* init message empty list */
	mq->msg_queue_free = RT_NULL;
	for (temp = 0; temp < mq->max_msgs; temp ++)
	{
		head = (struct rt_mq_message*)((rt_uint8_t*)mq->msg_pool +
			temp * (mq->msg_size + sizeof(struct rt_mq_message)));
		head->next = mq->msg_queue_free;
		mq->msg_queue_free = head;
	}

	/* the initial entry is zero */
	mq->entry		= 0;

	return mq;
}

/**
 * This function will delete a message queue object and release the memory
 *
 * @param mq the message queue object
 *
 * @return the error code
 */
rt_err_t rt_mq_delete (rt_mq_t mq)
{
1772
	RT_DEBUG_NOT_IN_INTERRUPT;
1773

1774 1775 1776 1777
	/* parameter check */
	RT_ASSERT(mq != RT_NULL);

	/* resume all suspended thread */
1778
	rt_ipc_list_resume_all(&(mq->parent.suspend_thread));
1779

qiuyiuestc's avatar
qiuyiuestc 已提交
1780
#if defined(RT_USING_MODULE) && defined(RT_USING_SLAB)
qiuyiuestc's avatar
qiuyiuestc 已提交
1781
	/* the mq object belongs to an application module */
1782
	if(mq->parent.parent.flag & RT_OBJECT_FLAG_MODULE)
qiuyiuestc's avatar
qiuyiuestc 已提交
1783 1784 1785 1786 1787
		rt_module_free(mq->parent.parent.module_id, mq->msg_pool);
	else
#endif

	/* free message queue pool */
1788 1789
	rt_free(mq->msg_pool);

qiuyiuestc's avatar
qiuyiuestc 已提交
1790
	/* delete message queue object */
1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
	rt_object_delete(&(mq->parent.parent));

	return RT_EOK;
}
#endif

/**
 * This function will send a message to message queue object, if there are threads
 * suspended on message queue object, it will be waked up.
 *
 * @param mq the message queue object
 * @param buffer the message
 * @param size the size of buffer
 *
 * @return the error code
 */
rt_err_t rt_mq_send (rt_mq_t mq, void* buffer, rt_size_t size)
{
	register rt_ubase_t temp;
	struct rt_mq_message *msg;

	/* greater than one message size */
	if (size > mq->msg_size) return -RT_ERROR;

1815
	RT_OBJECT_HOOK_CALL(rt_object_put_hook, (&(mq->parent.parent)));
1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832

	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

	/* get a free list, there must be an empty item */
	msg = (struct rt_mq_message*)mq->msg_queue_free;
	/* message queue is full */
	if (msg == RT_NULL)
	{
		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		return -RT_EFULL;
	}
	/* move free list pointer */
	mq->msg_queue_free = msg->next;

1833 1834 1835
	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

1836 1837
	/* the msg is the new tailer of list, the next shall be NULL */
	msg->next = RT_NULL;
1838 1839 1840
	/* copy buffer */
	rt_memcpy(msg + 1, buffer, size);

1841 1842
	/* disable interrupt */
	temp = rt_hw_interrupt_disable();
1843 1844 1845 1846 1847 1848 1849
	/* link msg to message queue */
	if (mq->msg_queue_tail != RT_NULL)
	{
		/* if the tail exists, */
		((struct rt_mq_message*)mq->msg_queue_tail)->next = msg;
	}

1850

1851 1852 1853 1854 1855 1856 1857 1858
	/* set new tail */
	mq->msg_queue_tail = msg;
	/* if the head is empty, set head */
	if (mq->msg_queue_head == RT_NULL)mq->msg_queue_head = msg;

	/* increase message entry */
	mq->entry ++;

1859
	/* resume suspended thread */
M
mbbill 已提交
1860
	if( !rt_list_isempty(&mq->parent.suspend_thread) )
1861
	{
1862
		rt_ipc_list_resume(&(mq->parent.suspend_thread));
1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		rt_schedule();
		return RT_EOK;
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

	return RT_EOK;
}

/**
 * This function will send urgently a message to message queue object, which means
 * the message will be inserted to the head of message queue. If there are threads
 * suspended on message queue object, it will be waked up.
 *
 * @param mq the message queue object
 * @param buffer the message
 * @param size the size of buffer
 *
 * @return the error code
 */
rt_err_t rt_mq_urgent(rt_mq_t mq, void* buffer, rt_size_t size)
{
	register rt_ubase_t temp;
	struct rt_mq_message *msg;

	/* greater than one message size */
	if (size > mq->msg_size) return -RT_ERROR;

1896
	RT_OBJECT_HOOK_CALL(rt_object_put_hook, (&(mq->parent.parent)));
1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913

	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

	/* get a free list, there must be an empty item */
	msg = (struct rt_mq_message*)mq->msg_queue_free;
	/* message queue is full */
	if (msg == RT_NULL)
	{
		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		return -RT_EFULL;
	}
	/* move free list pointer */
	mq->msg_queue_free = msg->next;

1914 1915 1916
	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

1917 1918 1919
	/* copy buffer */
	rt_memcpy(msg + 1, buffer, size);

1920 1921 1922
	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

1923 1924 1925 1926 1927 1928 1929 1930 1931 1932
	/* link msg to the beginning of message queue */
	msg->next = mq->msg_queue_head;
	mq->msg_queue_head = msg;

	/* if there is no tail */
	if (mq->msg_queue_tail == RT_NULL) mq->msg_queue_tail = msg;

	/* increase message entry */
	mq->entry ++;

1933
	/* resume suspended thread */
M
mbbill 已提交
1934
	if( !rt_list_isempty(&mq->parent.suspend_thread) )
1935
	{
1936
		rt_ipc_list_resume(&(mq->parent.suspend_thread));
1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		rt_schedule();
		return RT_EOK;
	}

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

	return RT_EOK;
}

/**
 * This function will receive a message from message queue object, if there is no
 * message in message queue object, the thread shall wait for a specified time.
 *
 * @param mq the message queue object
 * @param buffer the received message will be saved in
 * @param size the size of buffer
 * @param timeout the waiting time
 *
 * @return the error code
 */
rt_err_t rt_mq_recv (rt_mq_t mq, void* buffer, rt_size_t size, rt_int32_t timeout)
{
	struct rt_thread *thread;
	register rt_ubase_t temp;
	struct rt_mq_message *msg;
1967
	rt_uint32_t tick_delta;
1968

1969
	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(mq->parent.parent)));
1970

1971 1972 1973 1974 1975 1976 1977 1978 1979 1980
	/* disable interrupt */
	temp = rt_hw_interrupt_disable();

	/* for non-blocking call */
	if (mq->entry == 0 && timeout == 0)
	{
		rt_hw_interrupt_enable(temp);
		return -RT_ETIMEOUT;
	}

1981
	tick_delta = 0;
1982

1983 1984
	/* get current thread */
	thread = rt_thread_self();
B
bernard.xiong 已提交
1985

1986 1987
	/* message queue is empty */
	while (mq->entry == 0)
1988
	{
1989 1990
		RT_DEBUG_NOT_IN_INTERRUPT;

1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
		/* reset error number in thread */
		thread->error = RT_EOK;

		/* no waiting, return timeout */
		if (timeout == 0)
		{
			/* enable interrupt */
			rt_hw_interrupt_enable(temp);

			thread->error = -RT_ETIMEOUT;
			return -RT_ETIMEOUT;
		}

2004

2005
		/* suspend current thread */
2006 2007
		rt_ipc_list_suspend(&(mq->parent.suspend_thread),
				thread, mq->parent.parent.flag);
2008 2009 2010 2011

		/* has waiting time, start thread timer */
		if (timeout > 0)
		{
2012 2013
			/* get the start tick of timer */
			tick_delta = rt_tick_get();
B
bernard.xiong 已提交
2014

2015 2016 2017
			RT_DEBUG_LOG(RT_DEBUG_IPC,
				("set thread:%s to timer list\n", thread->name));

2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031
			/* reset the timeout of thread timer and start it */
			rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &timeout);
			rt_timer_start(&(thread->thread_timer));
		}

		/* enable interrupt */
		rt_hw_interrupt_enable(temp);

		/* re-schedule */
		rt_schedule();

		/* recv message */
		if (thread->error != RT_EOK)
		{
2032
		    /* return error */
2033 2034 2035 2036 2037
			return thread->error;
		}

		/* disable interrupt */
		temp = rt_hw_interrupt_disable();
2038 2039 2040 2041 2042 2043

		/* re-calculate timeout tick */
		if (timeout > 0)
		{
			tick_delta = rt_tick_get() - tick_delta;
			timeout -= tick_delta;
2044
			if (timeout < 0) timeout = 0;
2045
		}
2046 2047 2048 2049 2050 2051 2052 2053 2054 2055
	}

	/* get message from queue */
	msg = (struct rt_mq_message*) mq->msg_queue_head;

	/* move message queue head */
	mq->msg_queue_head = msg->next;
	/* reach queue tail, set to NULL */
	if (mq->msg_queue_tail == msg) mq->msg_queue_tail = RT_NULL;

2056 2057 2058 2059 2060 2061
	/* decrease message entry */
	mq->entry --;

	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

2062 2063 2064 2065
	/* copy message */
	rt_memcpy(buffer, msg + 1,
		size > mq->msg_size? mq->msg_size : size);

2066 2067
	/* disable interrupt */
	temp = rt_hw_interrupt_disable();
2068 2069 2070 2071 2072 2073
	/* put message to free list */
	msg->next = (struct rt_mq_message*)mq->msg_queue_free;
	mq->msg_queue_free = msg;
	/* enable interrupt */
	rt_hw_interrupt_enable(temp);

2074
	RT_OBJECT_HOOK_CALL(rt_object_take_hook, (&(mq->parent.parent)));
2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089

	return RT_EOK;
}

/**
 * This function can get or set some extra attributions of a message queue object.
 *
 * @param mq the message queue object
 * @param cmd the execution command
 * @param arg the execution argument
 *
 * @return the error code
 */
rt_err_t rt_mq_control(rt_mq_t mq, rt_uint8_t cmd, void* arg)
{
2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
	rt_ubase_t level;
	struct rt_mq_message *msg;

	RT_ASSERT(mq != RT_NULL);

	if (cmd == RT_IPC_CMD_RESET)
	{
		/* disable interrupt */
		level = rt_hw_interrupt_disable();

		/* resume all waiting thread */
2101
		rt_ipc_list_resume_all(&mq->parent.suspend_thread);
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128

		/* release all message in the queue */
		while (mq->msg_queue_head != RT_NULL)
		{
			/* get message from queue */
			msg = (struct rt_mq_message*) mq->msg_queue_head;

			/* move message queue head */
			mq->msg_queue_head = msg->next;
			/* reach queue tail, set to NULL */
			if (mq->msg_queue_tail == msg) mq->msg_queue_tail = RT_NULL;

			/* put message to free list */
			msg->next = (struct rt_mq_message*)mq->msg_queue_free;
			mq->msg_queue_free = msg;
		}

		/* clean entry */
		mq->entry = 0;

		/* enable interrupt */
		rt_hw_interrupt_enable(level);

		return RT_EOK;
	}

	return -RT_ERROR;
2129 2130 2131 2132
}

#endif /* end of RT_USING_MESSAGEQUEUE */
/*@}*/