Toby, Good work! There is several questions for your implementation: 1) If you play with the Completion port, there is no reason to use the hEvent  in the OVERLAPPED structure. Why do you use it? 2)I suppose socket_internal_iocp_read is called before you invoke the callback to let the callback consume the received data. Why do you call socket_internal_iocp_read firstly? 3)Is there any plan to support all of the Async operations, such as connect, listen, accept, read and write? BTW: your implementation has a lot of difference with libevent. The most important one is libevent is a "single-threaded event-driven" library. This could relieve the programmer from the burden of explicitly synchronization, althouth it can't explore the capability of SMP. best regards, hanzhu <div>On 12/10/06, Toby Douglass <<a href="mailto:toby.douglass@summerblue.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">toby.douglass@summerblue.net</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Zhu Han wrote: > I'm afraid WINDOWS Overlapped IO is a critical feature for libevent because > some of the servers required it.  I try to implement  this feature with > Completion Port.  Is anyone  busing on  it? If not, I will try to do it. I've written an IOCP library, which is here; <a href="http://www.summerblue.net/computing/libiocp/index.html" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.summerblue.net/computing/libiocp/index.html </a> It's not integrated into libevent though, which is something I'm not doing. I've finished rewriting that IOCP library to support listen sockets, so the IOCP stuff will take care of all the accept behaviour, too.  Right now I'm writing up test/example code for that, once it tests okay, I'll release, which I expect to do next weekend. _______________________________________________ Libevent-users mailing list <a href="mailto:Libevent-users@monkey.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> Libevent-users@monkey.org</a> <a href="http://monkey.org/mailman/listinfo/libevent-users" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> http://monkey.org/mailman/listinfo/libevent-users</a> </blockquote></div>