[En-Nut-Discussion] Multithreading

[Ole Reinhardt]

Hello,

> I would like to know what happen in a multithread program executing
> the same routins. What happen if in the middle of the execution of the
> routing another thread get the CPU and strar executing the same

Sorry, I don't understand your ascii drawings, but in your example you
won't run into problems. In your example every thread creates it's own
socket file descriptor. The stdio functions are thread safe.

You might also want to read http://www.ethernut.de/pdf/entet100.pdf

In case you want to access the same ressources (like a filedescriptor)
from different threads you need to use a lock to make shure not to
interleave the ressource access.

Regards,

Ole Reinhardt

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