Re: [lwip-users] The sockets interface, select()

[Kieran Mansley]

On Mon, 2011-09-19 at 10:31 +0300, Matias Mandell wrote:

> In the end of event_callback() when it has gone thru all tasks waiting 
> for a select() it unprotects&protects and starts over from the 
> beginning. At this point the sock->select_waiting was sometimes zero and 
> the loop crashed.
> 
> 
> In lwip_select() there are protections when adding/removing from list 
> and increasing/decreasing sock->select_waiting counters but they are not 
> in sync. How good idea is it to pass a local variable to another task, 
> there might be context switching in between? I might have a stack 
> overflow or something going on...

Without looking at the code I'm not quite sure what the problem is.  Do
you have a patch to fix it as that would show clearly what you're
describing.

Thanks

Kieran