On Wed, Nov 10, 2010 at 9:58 AM, Ralph Castain <r...@open-mpi.org> wrote: > > On Nov 9, 2010, at 9:57 PM, Nick Mathewson wrote: > >> On Tue, Nov 9, 2010 at 11:47 PM, Ralph Castain <r...@open-mpi.org> wrote: >>> >>> On Nov 9, 2010, at 9:03 PM, Nick Mathewson wrote: >> [...] >>>> So I'm assuming that you've got all the threading callbacks set up >>>> (probably via evthread_use_pthreads()) before you created the event >>>> base, so that evthread_make_base_notifiable() was called on the >>>> event_base when you created it. If that's not the case, that's >>>> probably the problem there. >>> >>> I missed that - this may well be my problem. Let me dig into this a little >>> and get back to you. >>> >>> FWIW: I don't see myself drop out of the event loop when I add the event. >>> In fact, just the opposite - I'm stuck in the loop and can't get out. So >>> I'm not sure the bug mentioned below is accurate. >>> >>> Let me see what happens when I setup the event base for notification. >> >> To clarify, it should set itself up to be notifiable if you have >> threading initialized before you create it. (If you're going to >> access an event_base from multiple threads, you MUST initialize >> threading, or else there won't be any locks, and you'll be in a world >> of race conditions.) >> >> Then again, calling evthread_make_base_notifiable() on an existing >> event_base shouldn't hurt, since it's (supposed to be) idempotent. > > I'm confused - the function you cite requires an event base be passed to it: > > int evthread_make_base_notifiable(struct event_base *base); > > So how can I call it -before- I create the event base?
Initializing threading is not the same as making a base notifiable. These are different things. You need to initialize threading before you create the base. That's why you call evthread_use_pthreads(). Doing so should make the base get set up as notifiable. If that doesn't work for some reason, you could try calling the function to make the base notifiable. HTH, -- Nick *********************************************************************** To unsubscribe, send an e-mail to majord...@freehaven.net with unsubscribe libevent-users in the body.
