Ok, I now I get it. So protection around my calls it is, but I don't quite see how RX and TX can be handled in the same thread since the TX-function is registered with lwip in the netif-structure and RX isn't.
OK I see now that there is an input-pointer in the netif-structure as well but it's not referenced in the driver-template (ethernetif.c) so I invented something on my own...I'll have to dig through the examples one more time and look how they have done it... /Åke ----------------------------- Åke Forslund 0433-273296 NIBE AB Box 14 S-285 21 Markaryd Tel +46-(0)433-273296 From: "Simon Goldschmidt" <goldsi...@gmx.de> To: Mailing list for lwIP users <lwip-users@nongnu.org> Date: 2011-09-02 14:32 Subject: Re: [lwip-users] how lwip know internet cable is unplug Sent by: lwip-users-bounces+ake.forslund=nibe...@nongnu.org ake.forsl...@nibe.se wrote: > I'm not quite sure what you're suggesting. Is it to put all calls that may > change states of netif, dhcp etc. in a single thread or is it the use of a > separate thread to handle RX, or something else? I'm just repeating the mantra that lwIP core code is not thread protected (with very little exceptions, mostly regarding memory management functions) and either all code using lwIP functions/variables must be used from one thread only or you have to protect it yourself (e.g. by using a semaphore or something like that). E.g. if you have RX in one thread and TX in another thread, you can be most sure that you will get problems at some point (e.g. corrupted state, corrupted pbuf-ref or corrupted lists). I have to point this out to prevent other users reading this list from making such a mistake (that can be hard to debug). And your statement "set_link_up/down looks pretty safe to use from my rx-thread" can sound like these functions are thread-safe to new users (as it did, to me). Simon -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
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