[lwip-devel] [task #7490] Add return value to sys_mbox_post

[Frédéric Bernon]

Follow-up Comment #10, task #7490 (project lwip):

>- multiple places in api_msg.c: conn->mbox (used like semaphore -> we could
convert it to a semaphore!) should not block, since tcpip_thread would be
blocked 

Agree, and it reduce a little bit the need of a "size" parameter for
sys_mbox_new. But if we change sys_mbox_new, I really would like to add this
size parameter, in the same idea that we have add "name" and "stacksize" to
sys_thread_new (port maintainer could decide to ignore them).

>We would need a flag (block or don't block) and a return value for that. Or
we only take the return value and never block...

Why not another function (in the same spirit we have add
sys_arch_mbox_tryfetch)? For a non-blocking function, error codes could be
ERR_OK if it post the message, or something like ERR_WOULDBLOCK or ERR_RETRY
?

But, is it something for 1.3.0, or post-1.3.0 ?




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