Thanks. 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 ?
--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
