1 /*
2 * Copyright (c) 2024 Akaiwa Wataru <akaiwa@sonas.co.jp>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6 #include <zephyr/kernel.h>
7 #include <zephyr/ztest.h>
8
9 static k_tid_t thread_id;
10
alarm_callback(struct k_timer * timer)11 static void alarm_callback(struct k_timer *timer)
12 {
13 k_wakeup(thread_id);
14 }
15
16 K_TIMER_DEFINE(alarm, alarm_callback, NULL);
17
18 /**
19 * @brief Test 32-bit tick wraparound during k_sleep() execution
20 */
ZTEST(wraparound,test_tick_wraparound_in_sleep)21 ZTEST(wraparound, test_tick_wraparound_in_sleep)
22 {
23 static const uint32_t start_ticks = 0xffffff00; /* It wraps around after 256 ticks! */
24 static const uint32_t timeout_ticks = 300; /* 3 seconds @ 100Hz tick */
25 static const uint32_t wakeup_ticks = 10; /* 100 ms @ 100Hz tick */
26
27 sys_clock_tick_set(start_ticks);
28
29 /* Wake up myself by alarm */
30 thread_id = k_current_get();
31 k_timer_start(&alarm, K_TICKS(wakeup_ticks), K_FOREVER);
32
33 /* Waiting alarm's k_wakeup() call */
34 int32_t left_ms = k_sleep(K_TICKS(timeout_ticks));
35
36 zassert(left_ms > 0, "k_sleep() timed out");
37
38 k_timer_stop(&alarm);
39 }
40
41 ZTEST_SUITE(wraparound, NULL, NULL, NULL, NULL, NULL);
42
