Linux Audio

Check our new training course

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 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
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
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
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
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
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
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
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
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
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
/*
 * Copyright (c) 2017 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <ztest.h>
#include <kernel.h>

/* global values and data structures */
struct fifo_msg {
	void *private;
	u32_t msg;
};

#define SIGNAL_RESULT 0x1ee7d00d
#define FIFO_MSG_VALUE 0xdeadbeef
#define STACK_SIZE (1024 + CONFIG_TEST_EXTRA_STACKSIZE)

/* verify k_poll() without waiting */
static struct k_sem no_wait_sem;
static struct k_fifo no_wait_fifo;
static struct k_poll_signal no_wait_signal;
static struct k_thread test_thread;
static struct k_thread test_loprio_thread;
K_THREAD_STACK_DEFINE(test_stack, STACK_SIZE);
K_THREAD_STACK_DEFINE(test_loprio_stack, STACK_SIZE);

/**
 * @brief Test cases to verify poll
 *
 * @defgroup kernel_poll_tests Poll tests
 *
 * @ingroup all_tests
 *
 * @{
 * @}
 */

/**
 * @brief Test poll events with no wait
 *
 * @ingroup kernel_poll_tests
 *
 * @see K_POLL_EVENT_INITIALIZER(), k_poll_signal_init(),
 * k_poll_signal_raise(), k_poll_signal_check()
 */
void test_poll_no_wait(void)
{
	struct fifo_msg msg = { NULL, FIFO_MSG_VALUE }, *msg_ptr;
	unsigned int signaled;
	int result;

	k_sem_init(&no_wait_sem, 1, 1);
	k_fifo_init(&no_wait_fifo);
	k_poll_signal_init(&no_wait_signal);

	struct k_poll_event events[] = {
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
					 K_POLL_MODE_NOTIFY_ONLY,
					 &no_wait_sem),
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_FIFO_DATA_AVAILABLE,
					 K_POLL_MODE_NOTIFY_ONLY,
					 &no_wait_fifo),
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SIGNAL,
					 K_POLL_MODE_NOTIFY_ONLY,
					 &no_wait_signal),
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_IGNORE,
					 K_POLL_MODE_NOTIFY_ONLY,
					 NULL),
	};

#ifdef CONFIG_USERSPACE
	/* Test that k_poll() syscall handler safely handles being
	 * fed garbage
	 *
	 * TODO: Where possible migrate these to the main k_poll()
	 * implementation
	 */

	zassert_equal(k_poll(events, 0, 0), -EINVAL, NULL);
	zassert_equal(k_poll(events, INT_MAX, 0), -EINVAL, NULL);
	zassert_equal(k_poll(events, 4096, 0), -ENOMEM, NULL);

	struct k_poll_event bad_events[] = {
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
					 K_POLL_NUM_MODES,
					 &no_wait_sem),
	};
	zassert_equal(k_poll(bad_events, ARRAY_SIZE(bad_events), 0), -EINVAL,
		      NULL);

	struct k_poll_event bad_events2[] = {
		K_POLL_EVENT_INITIALIZER(0xFU,
					 K_POLL_MODE_NOTIFY_ONLY,
					 &no_wait_sem),
	};
	zassert_equal(k_poll(bad_events2, ARRAY_SIZE(bad_events), 0), -EINVAL,
		      NULL);
#endif /* CONFIG_USERSPACE */

	/* test polling events that are already ready */
	zassert_false(k_fifo_alloc_put(&no_wait_fifo, &msg), NULL);
	k_poll_signal_raise(&no_wait_signal, SIGNAL_RESULT);

	zassert_equal(k_poll(events, ARRAY_SIZE(events), 0), 0, "");

	zassert_equal(events[0].state, K_POLL_STATE_SEM_AVAILABLE, "");
	zassert_equal(k_sem_take(&no_wait_sem, 0), 0, "");

	zassert_equal(events[1].state, K_POLL_STATE_FIFO_DATA_AVAILABLE, "");
	msg_ptr = k_fifo_get(&no_wait_fifo, 0);
	zassert_not_null(msg_ptr, "");
	zassert_equal(msg_ptr, &msg, "");
	zassert_equal(msg_ptr->msg, FIFO_MSG_VALUE, "");

	zassert_equal(events[2].state, K_POLL_STATE_SIGNALED, "");
	k_poll_signal_check(&no_wait_signal, &signaled, &result);
	zassert_not_equal(signaled, 0, "");
	zassert_equal(result, SIGNAL_RESULT, "");

	zassert_equal(events[3].state, K_POLL_STATE_NOT_READY, "");

	/* verify events are not ready anymore (user has to clear them first) */
	events[0].state = K_POLL_STATE_NOT_READY;
	events[1].state = K_POLL_STATE_NOT_READY;
	events[2].state = K_POLL_STATE_NOT_READY;
	events[3].state = K_POLL_STATE_NOT_READY;
	k_poll_signal_reset(&no_wait_signal);

	zassert_equal(k_poll(events, ARRAY_SIZE(events), 0), -EAGAIN, "");
	zassert_equal(events[0].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(events[1].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(events[2].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(events[3].state, K_POLL_STATE_NOT_READY, "");

	zassert_not_equal(k_sem_take(&no_wait_sem, 0), 0, "");
	zassert_is_null(k_fifo_get(&no_wait_fifo, 0), "");
}

/* verify k_poll() that has to wait */

static K_SEM_DEFINE(wait_sem, 0, 1);
static K_FIFO_DEFINE(wait_fifo);
static struct k_poll_signal wait_signal =
	K_POLL_SIGNAL_INITIALIZER(wait_signal);

struct fifo_msg wait_msg = { NULL, FIFO_MSG_VALUE };

#define TAG_0 10
#define TAG_1 11
#define TAG_2 12

struct k_poll_event wait_events[] = {
	K_POLL_EVENT_STATIC_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
					K_POLL_MODE_NOTIFY_ONLY,
					&wait_sem, TAG_0),
	K_POLL_EVENT_STATIC_INITIALIZER(K_POLL_TYPE_FIFO_DATA_AVAILABLE,
					K_POLL_MODE_NOTIFY_ONLY,
					&wait_fifo, TAG_1),
	K_POLL_EVENT_STATIC_INITIALIZER(K_POLL_TYPE_SIGNAL,
					K_POLL_MODE_NOTIFY_ONLY,
					&wait_signal, TAG_2),
	K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_IGNORE,
					K_POLL_MODE_NOTIFY_ONLY,
					NULL),
};

static void poll_wait_helper(void *use_fifo, void *p2, void *p3)
{
	(void)p2; (void)p3;

	k_sleep(250);

	k_sem_give(&wait_sem);

	if ((intptr_t)use_fifo) {
		k_fifo_alloc_put(&wait_fifo, &wait_msg);
	}

	k_poll_signal_raise(&wait_signal, SIGNAL_RESULT);
}

/**
 * @brief Test polling with wait
 *
 * @ingroup kernel_poll_tests
 *
 * @see k_poll_signal_init(), k_poll()
 */
void test_poll_wait(void)
{
	const int main_low_prio = 10;

	struct fifo_msg *msg_ptr;
	int rc;

	int old_prio = k_thread_priority_get(k_current_get());

	k_poll_signal_init(&wait_signal);
	/*
	 * Wait for 3 non-ready events to become ready from a higher priority
	 * thread.
	 */
	k_thread_priority_set(k_current_get(), main_low_prio);

	k_thread_create(&test_thread, test_stack,
			K_THREAD_STACK_SIZEOF(test_stack),
			poll_wait_helper, (void *)1, 0, 0,
			main_low_prio - 1, K_USER | K_INHERIT_PERMS, 0);

	rc = k_poll(wait_events, ARRAY_SIZE(wait_events), K_SECONDS(1));

	k_thread_priority_set(k_current_get(), old_prio);

	zassert_equal(rc, 0, "");

	zassert_equal(wait_events[0].state, K_POLL_STATE_SEM_AVAILABLE, "");
	zassert_equal(k_sem_take(&wait_sem, 0), 0, "");
	zassert_equal(wait_events[0].tag, TAG_0, "");

	zassert_equal(wait_events[1].state,
		      K_POLL_STATE_FIFO_DATA_AVAILABLE, "");
	msg_ptr = k_fifo_get(&wait_fifo, 0);
	zassert_not_null(msg_ptr, "");
	zassert_equal(msg_ptr, &wait_msg, "");
	zassert_equal(msg_ptr->msg, FIFO_MSG_VALUE, "");
	zassert_equal(wait_events[1].tag, TAG_1, "");

	zassert_equal(wait_events[2].state, K_POLL_STATE_SIGNALED, "");
	zassert_equal(wait_signal.signaled, 1, "");
	zassert_equal(wait_signal.result, SIGNAL_RESULT, "");
	zassert_equal(wait_events[2].tag, TAG_2, "");

	zassert_equal(wait_events[3].state, K_POLL_STATE_NOT_READY, "");

	/* verify events are not ready anymore */
	wait_events[0].state = K_POLL_STATE_NOT_READY;
	wait_events[1].state = K_POLL_STATE_NOT_READY;
	wait_events[2].state = K_POLL_STATE_NOT_READY;
	wait_events[3].state = K_POLL_STATE_NOT_READY;
	wait_signal.signaled = 0U;

	zassert_equal(k_poll(wait_events, ARRAY_SIZE(wait_events),
			     K_SECONDS(1)), -EAGAIN, "");

	zassert_equal(wait_events[0].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(wait_events[1].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(wait_events[2].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(wait_events[3].state, K_POLL_STATE_NOT_READY, "");

	/* tags should not have been touched */
	zassert_equal(wait_events[0].tag, TAG_0, "");
	zassert_equal(wait_events[1].tag, TAG_1, "");
	zassert_equal(wait_events[2].tag, TAG_2, "");

	/*
	 * Wait for 2 out of 3 non-ready events to become ready from a higher
	 * priority thread.
	 */
	k_thread_priority_set(k_current_get(), main_low_prio);

	k_thread_create(&test_thread, test_stack,
			K_THREAD_STACK_SIZEOF(test_stack),
			poll_wait_helper,
			0, 0, 0, main_low_prio - 1, 0, 0);

	rc = k_poll(wait_events, ARRAY_SIZE(wait_events), K_SECONDS(1));

	k_thread_priority_set(k_current_get(), old_prio);

	zassert_equal(rc, 0, "");

	zassert_equal(wait_events[0].state, K_POLL_STATE_SEM_AVAILABLE, "");
	zassert_equal(k_sem_take(&wait_sem, 0), 0, "");
	zassert_equal(wait_events[0].tag, TAG_0, "");

	zassert_equal(wait_events[1].state, K_POLL_STATE_NOT_READY, "");
	msg_ptr = k_fifo_get(&wait_fifo, K_NO_WAIT);
	zassert_is_null(msg_ptr, "");
	zassert_equal(wait_events[1].tag, TAG_1, "");

	zassert_equal(wait_events[2].state, K_POLL_STATE_SIGNALED, "");
	zassert_equal(wait_signal.signaled, 1, "");
	zassert_equal(wait_signal.result, SIGNAL_RESULT, "");
	zassert_equal(wait_events[2].tag, TAG_2, "");

	/*
	 * Wait for each event to be ready from a lower priority thread, one at
	 * a time.
	 */

	wait_events[0].state = K_POLL_STATE_NOT_READY;
	wait_events[1].state = K_POLL_STATE_NOT_READY;
	wait_events[2].state = K_POLL_STATE_NOT_READY;
	wait_signal.signaled = 0U;

	k_thread_create(&test_thread, test_stack,
			K_THREAD_STACK_SIZEOF(test_stack),
			poll_wait_helper,
			(void *)1, 0, 0, old_prio + 1,
			K_USER | K_INHERIT_PERMS, 0);

	/* semaphore */
	rc = k_poll(wait_events, ARRAY_SIZE(wait_events), K_SECONDS(1));

	zassert_equal(rc, 0, "");

	zassert_equal(wait_events[0].state, K_POLL_STATE_SEM_AVAILABLE, "");
	zassert_equal(k_sem_take(&wait_sem, 0), 0, "");
	zassert_equal(wait_events[0].tag, TAG_0, "");

	zassert_equal(wait_events[1].state, K_POLL_STATE_NOT_READY, "");
	msg_ptr = k_fifo_get(&wait_fifo, K_NO_WAIT);
	zassert_is_null(msg_ptr, "");
	zassert_equal(wait_events[1].tag, TAG_1, "");

	zassert_equal(wait_events[2].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(wait_events[2].tag, TAG_2, "");

	wait_events[0].state = K_POLL_STATE_NOT_READY;

	/* fifo */
	rc = k_poll(wait_events, ARRAY_SIZE(wait_events), K_SECONDS(1));

	zassert_equal(rc, 0, "");

	zassert_equal(wait_events[0].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(k_sem_take(&wait_sem, 0), -EBUSY, "");
	zassert_equal(wait_events[0].tag, TAG_0, "");

	zassert_equal(wait_events[1].state,
		      K_POLL_STATE_FIFO_DATA_AVAILABLE, "");
	msg_ptr = k_fifo_get(&wait_fifo, K_NO_WAIT);
	zassert_not_null(msg_ptr, "");
	zassert_equal(wait_events[1].tag, TAG_1, "");

	zassert_equal(wait_events[2].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(wait_events[2].tag, TAG_2, "");

	wait_events[1].state = K_POLL_STATE_NOT_READY;

	/* poll signal */
	rc = k_poll(wait_events, ARRAY_SIZE(wait_events), K_SECONDS(1));

	zassert_equal(rc, 0, "");

	zassert_equal(wait_events[0].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(k_sem_take(&wait_sem, 0), -EBUSY, "");
	zassert_equal(wait_events[0].tag, TAG_0, "");

	zassert_equal(wait_events[1].state, K_POLL_STATE_NOT_READY, "");
	msg_ptr = k_fifo_get(&wait_fifo, K_NO_WAIT);
	zassert_is_null(msg_ptr, "");
	zassert_equal(wait_events[1].tag, TAG_1, "");

	zassert_equal(wait_events[2].state, K_POLL_STATE_SIGNALED, "");
	zassert_equal(wait_signal.signaled, 1, "");
	zassert_equal(wait_signal.result, SIGNAL_RESULT, "");
	zassert_equal(wait_events[2].tag, TAG_2, "");

	wait_events[2].state = K_POLL_STATE_NOT_READY;
	wait_signal.signaled = 0U;
}

/* verify k_poll() that waits on object which gets cancellation */

static struct k_fifo cancel_fifo;
static struct k_fifo non_cancel_fifo;

static void poll_cancel_helper(void *p1, void *p2, void *p3)
{
	(void)p1; (void)p2; (void)p3;

	static struct fifo_msg msg;

	k_sleep(100);

	k_fifo_cancel_wait(&cancel_fifo);

	k_fifo_alloc_put(&non_cancel_fifo, &msg);
}

/**
 * @brief Test polling of cancelled fifo
 *
 * @ingroup kernel_poll_tests
 *
 * @see k_poll(), k_fifo_cancel_wait()
 */
void test_poll_cancel(bool is_main_low_prio)
{
	const int main_low_prio = 10;
	int old_prio = k_thread_priority_get(k_current_get());
	int rc;

	struct k_poll_event cancel_events[] = {
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_FIFO_DATA_AVAILABLE,
					K_POLL_MODE_NOTIFY_ONLY,
					&cancel_fifo),
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_FIFO_DATA_AVAILABLE,
					K_POLL_MODE_NOTIFY_ONLY,
					&non_cancel_fifo),
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_IGNORE,
					K_POLL_MODE_NOTIFY_ONLY,
					NULL),
	};

	k_fifo_init(&cancel_fifo);
	k_fifo_init(&non_cancel_fifo);

	if (is_main_low_prio) {
		k_thread_priority_set(k_current_get(), main_low_prio);
	}

	k_thread_create(&test_thread, test_stack,
			K_THREAD_STACK_SIZEOF(test_stack),
			poll_cancel_helper, (void *)1, 0, 0,
			main_low_prio - 1, K_USER | K_INHERIT_PERMS, 0);

	rc = k_poll(cancel_events, ARRAY_SIZE(cancel_events), K_SECONDS(1));

	k_thread_priority_set(k_current_get(), old_prio);

	zassert_equal(rc, -EINTR, "");

	zassert_equal(cancel_events[0].state,
		      K_POLL_STATE_CANCELLED, "");

	if (is_main_low_prio) {
		/* If poller thread is lower priority than threads which
		 * generate poll events, it may get multiple poll events
		 * at once.
		 */
		zassert_equal(cancel_events[1].state,
			      K_POLL_STATE_FIFO_DATA_AVAILABLE, "");
	} else {
		/* Otherwise, poller thread will be woken up on first
		 * event triggered.
		 */
		zassert_equal(cancel_events[1].state,
			      K_POLL_STATE_NOT_READY, "");
	}
}

void test_poll_cancel_main_low_prio(void)
{
	test_poll_cancel(true);
}

void test_poll_cancel_main_high_prio(void)
{
	test_poll_cancel(false);
}

/* verify multiple pollers */
static K_SEM_DEFINE(multi_sem, 0, 1);

static void multi_lowprio(void *p1, void *p2, void *p3)
{
	(void)p1; (void)p2; (void)p3;

	struct k_poll_event event;
	int rc;

	k_poll_event_init(&event, K_POLL_TYPE_SEM_AVAILABLE,
			  K_POLL_MODE_NOTIFY_ONLY, &multi_sem);

	(void)k_poll(&event, 1, K_FOREVER);
	rc = k_sem_take(&multi_sem, K_FOREVER);
	zassert_equal(rc, 0, "");
}

static K_SEM_DEFINE(multi_reply, 0, 1);

static void multi(void *p1, void *p2, void *p3)
{
	(void)p1; (void)p2; (void)p3;

	struct k_poll_event event;

	k_poll_event_init(&event, K_POLL_TYPE_SEM_AVAILABLE,
			  K_POLL_MODE_NOTIFY_ONLY, &multi_sem);

	(void)k_poll(&event, 1, K_FOREVER);
	k_sem_take(&multi_sem, K_FOREVER);
	k_sem_give(&multi_reply);
}

static K_SEM_DEFINE(multi_ready_sem, 1, 1);

/**
 * @brief Test polling of multiple events
 *
 * @ingroup kernel_poll_tests
 *
 * @see K_POLL_EVENT_INITIALIZER(), k_poll(), k_poll_event_init()
 */
void test_poll_multi(void)
{
	int old_prio = k_thread_priority_get(k_current_get());
	const int main_low_prio = 10;
	int rc;

	struct k_poll_event events[] = {
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
					 K_POLL_MODE_NOTIFY_ONLY,
					 &multi_sem),
		K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
					 K_POLL_MODE_NOTIFY_ONLY,
					 &multi_ready_sem),
	};

	k_thread_priority_set(k_current_get(), main_low_prio);

	k_thread_create(&test_thread, test_stack,
			K_THREAD_STACK_SIZEOF(test_stack),
			multi, 0, 0, 0, main_low_prio - 1,
			K_USER | K_INHERIT_PERMS, 0);

	/*
	 * create additional thread to add multiple(more than one) pending threads
	 * in events list to improve code coverage
	 */
	k_thread_create(&test_loprio_thread, test_loprio_stack,
			K_THREAD_STACK_SIZEOF(test_loprio_stack),
			multi_lowprio, 0, 0, 0, main_low_prio + 1,
			K_USER | K_INHERIT_PERMS, 0);

	/* Allow lower priority thread to add poll event in the list */
	k_sleep(250);
	rc = k_poll(events, ARRAY_SIZE(events), K_SECONDS(1));

	zassert_equal(rc, 0, "");
	zassert_equal(events[0].state, K_POLL_STATE_NOT_READY, "");
	zassert_equal(events[1].state, K_POLL_STATE_SEM_AVAILABLE, "");

	/* free polling threads, ensuring it awoken from k_poll() and got the sem */
	k_sem_give(&multi_sem);
	k_sem_give(&multi_sem);
	rc = k_sem_take(&multi_reply, K_SECONDS(1));

	zassert_equal(rc, 0, "");

	/* wait for polling threads to complete execution */
	k_thread_priority_set(k_current_get(), old_prio);
	k_sleep(250);
}

static struct k_poll_signal signal;

static void threadstate(void *p1, void *p2, void *p3)
{
	(void)p2; (void)p3;

	k_sleep(250);
	/* Update polling thread state explicitly to improve code coverage */
	k_thread_suspend(p1);
	/* Enable polling thread by signalling */
	k_poll_signal_raise(&signal, SIGNAL_RESULT);
	k_thread_resume(p1);
}

/**
 * @brief Test polling of events by manipulating polling thread state
 *
 * This is required for improving code coverage by manipulating thread
 * state to consider case where no polling thread is available during
 * event signalling.
 *
 * @ingroup kernel_poll_tests
 *
 * @see K_POLL_EVENT_INITIALIZER(), k_poll(), k_poll_signal_init(),
 * k_poll_signal_check(), k_poll_signal_raise()
 */
void test_poll_threadstate(void)
{
	unsigned int signaled;
	const int main_low_prio = 10;
	int result;

	k_poll_signal_init(&signal);

	struct k_poll_event event;

	k_poll_event_init(&event, K_POLL_TYPE_SIGNAL,
			  K_POLL_MODE_NOTIFY_ONLY, &signal);

	int old_prio = k_thread_priority_get(k_current_get());

	k_thread_priority_set(k_current_get(), main_low_prio);
	k_tid_t ztest_tid = k_current_get();

	k_thread_create(&test_thread, test_stack,
			K_THREAD_STACK_SIZEOF(test_stack), threadstate,
			ztest_tid, 0, 0, main_low_prio - 1, K_INHERIT_PERMS, 0);

	/* wait for spawn thread to take action */
	zassert_equal(k_poll(&event, 1, K_SECONDS(1)), 0, "");
	zassert_equal(event.state, K_POLL_STATE_SIGNALED, "");
	k_poll_signal_check(&signal, &signaled, &result);
	zassert_not_equal(signaled, 0, "");
	zassert_equal(result, SIGNAL_RESULT, "");

	event.state = K_POLL_STATE_NOT_READY;
	k_poll_signal_reset(&signal);
	/* teardown */
	k_thread_priority_set(k_current_get(), old_prio);
}

void test_poll_grant_access(void)
{
	k_thread_access_grant(k_current_get(), &no_wait_sem, &no_wait_fifo,
			      &no_wait_signal, &wait_sem, &wait_fifo,
			      &cancel_fifo, &non_cancel_fifo,
			      &wait_signal, &test_thread,
			      &test_stack, &multi_sem, &multi_reply)
}