RE: How does a thread suspend itself?

tesc — Thu, 18 Dec 2025 07:28:27 GMT

Hi,

Typically, from the thread itself you would like to take a semaphore (k_sem_take()) or suspend for a given amount of time before the thread automatically resumes (k_sleep()). Sometimes you just want other threads to start executing, if there are any, and therefore stop the execution of the current thread early (yield()). Sometimes you might want the thread to stop and never start again (return from the entry point function of the thread).

If you want to suspend the thread from itself, then you can do so with k_thread_suspend(), yes, but please note that then some other thread must later call k_thread_resume() on the thread for it to get back from the suspended state. The argument for k_thread_suspend(), of type k_tid_t, is the thread ID which you got from the call to k_thread_create(). From within the thread itself, you can get this ID from a call to k_current_get().

Regards,
Terje

RE: How does a thread suspend itself?

Turbo J — Wed, 17 Dec 2025 22:13:27 GMT

Why would one want to do that? Use k_sem_take() instead. That one allows other threads to wake you back up rather easy.