[ENet-discuss] enet, epoll and libevent

[Mihai Draghicioiu]

I've already managed to get it to work, thanks to the hopmod guys (reactor
branch).

http://code.google.com/p/frogmod/source/detail?r=193

It seems enet_host_service is used without a timeout, so it doesn't block.

Thanks for replying!


On Tue, Aug 4, 2009 at 1:27 PM, Uj <ujdevil at gmail.com> wrote:

> Hi Mihai,
>
> enet_host_service() is essential in Enet, since it handles all the
> connectivity of the network engine (reliability, disconnections...)
> I think you're about to miss what enet is designed for, and your code just
> won't work.
>
> Maybe you should go TCP and I/O ports?
>
> regards,
> Ju
>
>
> On Sat, Aug 1, 2009 at 3:45 PM, Mihai Draghicioiu <
> mihai.draghicioiu at gmail.com> wrote:
>
>> Hi all. I'm working on frogmod, a sauerbraten server. At first it used the
>> original sauer main loop, then I changed it to use a loop similar to
>> BloodFrontier (checks for events then sleeps for 1ms), but now I want to
>> make it work with libevent. The way libevent works -- you receive a callback
>> for each event that happens on the socket. That way the most cpu is saved
>> when there are no connections, and everything is asynchronous (including the
>> dns). From what I can see in the enet code -- enet_host_service() and
>> enet_socket_wait(), the way to replace the main loop would be something like
>> this, for reading:
>>
>> // basically set a callback for when data is available for reading
>> event_set(&evinfo, socket, EV_READ | EV_PERSIST, readcb, NULL);
>> event_add(&evinfo, NULL);
>>
>> void readcb(...) { // handle incoming data. the code is pasted
>>         if (event != NULL)
>>     {
>>         event -> type = ENET_EVENT_TYPE_NONE;
>>         event -> peer = NULL;
>>         event -> packet = NULL;
>>
>>         switch (enet_protocol_dispatch_incoming_commands (host, event))
>>         {
>>         case 1:
>>             return 1;
>>
>>         case -1:
>>             perror ("Error dispatching incoming packets");
>>
>>             return -1;
>>
>>         default:
>>             break;
>>         }
>>     }
>> }
>>
>> (and something similar for writing)
>>
>> So basically, it would mean replacing enet_host_service() in the program
>> with the libevent setup.
>>
>> The reason I'm doing this is because libevent also provides me with async
>> DNS, http server/client code, and I've already written IRC client code. This
>> would also make frogmod modular, able to easily support other enet based
>> servers (like blood frontier).
>>
>> My questions are:
>> 1. Is this code the good way to go about it? Basically with libevent you
>> add some fds for reading and some for writing, then enter its loop, from
>> where it dispatches.
>> 2. What would you recommend instead?
>>
>>
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>>
>>
>
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