Re: [Libevent-users] event_add while running main loop

Hi,

I have been using libevent for exactly same purpose as you have described and works fine. Once I detect the connection has gone down, ( I don't use timer though, just use the read callback and read fails), I don't connect immediately. I invoke a timer of 1 sec or so and then try connect. Do you check the return code for connect to make sure it is successful? Maybe your connect is actually failing since TCP connection is not fully closed yet.

On Tue, Nov 5, 2013 at 10:59 PM, Goetz T. Fischer <g.fischer@xxxxxxxxxxxxx> wrote:

good morning/evening/afternoon, whatever matches your timezone :-)

i've been scratching my head over one issue for some time and couldn't find
anything helpful on the net either so here's my last resort i hope.

i have a unix/c program using, surprise, libevent. it runs 3 events, a tcp
client, a tcp listener and a timer. everything works fine. the problem now is
that the server to which i connect the tcp client event drops out occasionally.
because of that i added the timer event to do checks. that works fine, too.
now if i notice that the server is down i want to reconnect without killing the
event loop so that the listener is not affected. what i do in case of a
disconnect is close the socket, event_del, event_free. after that i connect the
socket again and then add the event the same way as i do when the programs
starts:
evutil_make_socket_nonblocking(so);
client = event_new(base, so, EV_READ|EV_PERSIST, incoming, (void *)base);
event_add(client, NULL);

at this point nothing comes in at all so i tried event_active(client, NULL,
NULL) which only works for a second or so meaning i get 3 lines and nothing
after that.
now the big question is is it possible to add an event while the main loop is
running? and if so what did i miss?

any sort of hints would be very much appreciated :-)

--
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Phone: +49(0)7225/98 98 79
eMail: g.fischer@xxxxxxxxxxxxxxxxx
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