NicheStack multiple select() call fails!

Thank you for your reply!

I will try it!

I noticed, that when the select() is first entered within both tasks, the wakeup-function wakes both tasks correctly (this is done for timeout-checking within the select).

But when is send data to the socket of the lower-priority tasks, this task will be excluded permanently from the cyclic wakeup.

So i thingk the problem is located in the tcp_sleep and/or tcp_wakeup functions or there is a bug in the semaphore- mutex- handling....

But what do you recomend to do in my case?

(I need a very short latency between data reception on a socket and it's processing).