> On 01/30/2014 03:09 PM, Michal Nazarewicz wrote: >> This is not a good way to do this. You are looping around with >> 1 µseconds delays in each loop. This is active polling and is not a way >> to implement anything. To properly use AIO with a single thread while >> you also handling ep0, you need to use signals and ppoll. In pseudo >> code: >> >> 1. Set up ep0, open up ep1. >> 1. Set up SIGUSR1 handler to do nothing. >> 2. Set up signal mask such that SIGUSR1 is blocked. >> 3. Schedule transfers to ep1 if needed. >> 4. Use ppoll with sigmask where SIGUSR1 is not blocked. >> 5a. If ppoll returned SIGINTR io_getevents with a zero timeout. >> 5b. If ppoll returned > 0, process ep0. >> 5c. If ppoll returned < 0, exit with an error. >> 6. Go to step 3. >> >> Useful reading: >> * man ppoll >> * man sigevent >> * man sigprocmask >> >> You can find a bit of code that uses this technique at line 95 of: >> https://github.com/mina86/p2p-chat/blob/master/src/application.cpp On Tue, Feb 04 2014, Robert Baldyga wrote: > This code is an example. Don't you think it would be better to keep it > simple? Sure, but it also has to be correct. Busy waiting is *not* correct. -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +--<mpn@xxxxxxxxxx>--<xmpp:mina86@xxxxxxxxxx>--ooO--(_)--Ooo--
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