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kernel: sched: Make k_sleep() similar to POSIX equivalent

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This commit introduces k_sleep() return value, which provides
information about actual sleep time. If the returned value is
not-zero, the thread slept shorter than requested, which is
only possible if the thread has been woken up by k_wakeup() call.

Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
This commit is contained in:
Piotr Zięcik 2018-10-25 17:45:08 +02:00 • committed by Carles Cufí
commit 7700eb2a15
2 changed files with 17 additions and 10 deletions
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6
include/kernel.h
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@ -787,9 +787,11 @@ void k_thread_system_pool_assign(struct k_thread *thread);
*
* @param duration Number of milliseconds to sleep.
*
* @return N/A
* @return Zero if the requested time has elapsed or the number of milliseconds
* left to sleep, if thread was woken up by \ref k_wakeup call.
*
*/
__syscall void k_sleep(s32_t duration);
__syscall s32_t k_sleep(s32_t duration);
/**
* @brief Cause the current thread to busy wait.