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kernel: nothread: fix build when CONFIG_SYS_CLOCK_EXISTS=n

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The k_timer API requires CONFIG_SYS_CLOCK_EXISTS to be enabled,
as timer.c is only compiled when this config is set. Guard the
timer-based k_sleep() implementation and fall back to the previous
busy-wait approach when no system clock exists.

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>
This commit is contained in:
Sylvio Alves
2026-01-09 11:33:47 -03:00
committed by Henrik Brix Andersen
parent 517cd3e5c6
commit f3deb7bed7
1 changed files with 32 additions and 0 deletions
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32
kernel/nothread.c
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@@ -14,7 +14,9 @@ bool k_is_in_isr(void)
return arch_is_in_isr();
}
#ifdef CONFIG_SYS_CLOCK_EXISTS
static K_TIMER_DEFINE(sleep_timer, NULL, NULL);
#endif
/* This is a fallback implementation of k_sleep() for when multi-threading is
* disabled. The main implementation is in sched.c.
@@ -34,6 +36,7 @@ int32_t z_impl_k_sleep(k_timeout_t timeout)
return (int32_t) K_TICKS_FOREVER;
}
#ifdef CONFIG_SYS_CLOCK_EXISTS
k_timer_start(&sleep_timer, timeout, K_NO_WAIT);
/* When multithreading is disabled, this will enter a low power state
@@ -48,4 +51,33 @@ int32_t z_impl_k_sleep(k_timeout_t timeout)
* sleep for the entire timeout duration (no thread to awake).
*/
return 0;
#else
/* Fallback to busy-wait when no system clock is available */
k_ticks_t ticks;
uint32_t ticks_to_wait;
ticks = timeout.ticks;
if (Z_IS_TIMEOUT_RELATIVE(timeout)) {
/* ticks is delta timeout */
ticks_to_wait = ticks;
} else {
/* ticks is absolute timeout expiration */
uint32_t curr_ticks = sys_clock_tick_get_32();
if (Z_TICK_ABS(ticks) > curr_ticks) {
ticks_to_wait = Z_TICK_ABS(ticks) - curr_ticks;
} else {
ticks_to_wait = 0;
}
}
/* busy wait to be time coherent since subsystems may depend on it */
z_impl_k_busy_wait(k_ticks_to_us_ceil32(ticks_to_wait));
int32_t ret = k_ticks_to_ms_ceil64(0);
SYS_PORT_TRACING_FUNC_EXIT(k_thread, sleep, timeout, ret);
return ret;
#endif
}