Thank you, Simon.
Darius
----- Original Message -----
From: "Simon Goldschmidt" <[email protected]>
To: "Mailing list for lwIP users" <[email protected]>
Sent: Friday, March 23, 2012 3:12 PM
Subject: Re: [lwip-users] UDP socket thread safe problem - arp proccess
error if ARP_QUEUEING 1
"Darius Babrauskas" <[email protected]> wrote:
But how raw api? It must working in tcpip_thread context?
In LWIP 1.2v my aplication main task using udp_sendto function,
which
internaly use etharp_output, which use etharp_query which using not
protected ARP table.
So problem leave same. 2 task using one not protected APR table.
No, both your lwIP port and your application have to ensure you are not
using lwIP from more than one contexs at the same time (where context
means thread or ISR). How you do this is up to you: you can use a mutex or
process RX packets and timers from the same main loop that eventually
calls udp_output().
Thread-safety is not something which is provided by lwIP itself: the
developer creating the port or application is free to chose which type of
concurrency protection he wants to use.
Simon
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