Hello, On Wed, Jun 20, 2018 at 11:03:21AM +0200, Johannes Kliemann wrote: > > Please have a look into the test residing in > > libports/src/test/libc_component. > > That looks indeed close to what I want to have. What is not clear to me > why _select_ready is registered as handler but then still called > manually after Select_handler::select returns. > > Sorry for being nitpicky, I just want to get a better understanding > about this (my understanding of the whole Libc interface also could be > better so this is a starting point).
No problem. It is registered as handler function for the case the entrypoint was blocked when the fd becomes readable. But, (like in POSIX) Select_handler::select() may also return immediately with readable fds, which should also be handled immediately. I remember distantly that otherwise a deblocked fd ended up unhandled in some edge cases. Greets -- Christian Helmuth Genode Labs https://www.genode-labs.com/ · https://genode.org/ https://twitter.com/GenodeLabs · /ˈdʒiː.nəʊd/ Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth _______________________________________________ Genode users mailing list [email protected] https://lists.genode.org/listinfo/users
