> If I set fd to non-blocking mode, does ibv_get_async_event() > return 0 is there is an event, and return non-0 if nothing ?
Roland, Can you answer this question ? > > --CQ > > > > -----Original Message----- > > From: Roland Dreier [mailto:[EMAIL PROTECTED] > > Sent: Friday, March 02, 2007 4:30 PM > > To: Steve Wise > > Cc: Tang, Changqing; [email protected] > > Subject: Re: [ofa-general] Re: Is ibv_get_async_event() a blocking > > call ? > > > > > > I wonder if libibverbs can do this way for application > and make > > > > ibv_get_async_event() non-blocking. But I will try this way now. > > > > > > > > > > I wonder what happens if you set the async file descriptor to > > > non-blocking? > > > > > > Roland? Would that return EWOULDBLOCK if there are no events? > > > > Yes, as you can see if you look at the libibverbs internals, > > ibv_get_async_event() is just doing read() on a file > descriptor. So > > all the standard ways of handling finding out whether the > descriptor > > is ready to read should work: block in read(), use poll(), epoll, > > SIGIO, async IO, etc. And using fcntl to set the descriptor to > > non-blocking mode would work too. > > > > - R. > > > _______________________________________________ > general mailing list > [email protected] > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general > > To unsubscribe, please visit > http://openib.org/mailman/listinfo/openib-general > _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
