Re: k_poll usage

Vakul Garg <vakul.garg@...>

Hi Paul

Thanks for the reply. It seems quite restrictive that most of zephyr IPC does not support k_poll. How applications can simultaneously poll on fifo, mailbox?

Any reason why kernel kept limited usage for k_poll?


From: Paul Sokolovsky <paul.sokolovsky@...>
Sent: Tuesday, October 17, 2017 3:41:51 PM
To: Vakul Garg
Cc: zephyr-users@...
Subject: Re: [Zephyr-users] k_poll usage
Hello Vakul,

On Fri, 13 Oct 2017 05:48:22 +0000
Vakul Garg <vakul.garg@...> wrote:

> Hi
> The zephyr documentation says k_poll to operate on objects - kernel
> fifo, poll signal, semaphore. Can't it also be used on mailboxes,
> message queues etc?

Looking at the include/kernel.h, all k_poll'able object must have
a .poll_events member (either directly or via _POLL_EVENT macro).
Mailboxes and message queues don't have it. This can be confirmed by
looking at kernel/poll.c:register_event(), which handles each of the
supported pollable objects via a switch statement.

> Regards
> Vakul

Best Regards,
Paul | Open source software for ARM SoCs
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