[Libevent-users] Re: IOCP writes

[William Ahern]

On Thu, Feb 22, 2007 at 09:01:00PM +0000, Toby Douglass wrote:
> However, I've just realized that it may make no difference.
> 
> Writing to a UDP socket should never block; agreed.
> 
> However, that multiple concurrent writes (one socket, many writer 
> threads) can occur, and so the internal mechanics of the IOCP API must 
> support that behaviour (assume we have enough bandwidth and the write 
> rate is low enough that we're not dropping packets).
> 
> If I only have a single overlapped structure for writes, I cannot 
> support that behaviour.
> 
> So I have to malloc the overlapped structure per write (or have the user 
> pass one in).

I admittedly don't no anything about IOCP. What I do no is that it doesn't
make sense to use any other function call then send() or sendto() to write
out UDP data. So whatever API your writing around IOCP, it should
short-circuit for UDP writes; just call send() to sendto().

But, that's all I'll say for now, since eventually I'm just going to look
foolish for my lack of IOCP knowledge.