RE: [boost] Re: AW: Re: AW: Sockets

From: Boris Schäling (boris_at_[hidden])
Date: 2002-11-27 14:13:38

> -----Original Message-----
> From: boost-bounces_at_[hidden]
> [mailto:boost-bounces_at_[hidden]]On Behalf Of Hamish Mackenzie
> Sent: Wednesday, November 27, 2002 5:00 PM
> To: Boost mailing list
> Subject: RE: [boost] Re: AW: Re: AW: Sockets
>
>
> [...]
> > My implementation selects on all file descriptors and calls all on_xxx
> > methods that must be called before it selects again on all file
> descriptors.
> > An on_xxx method must complete before another one is called. As
> every stream
> > uses its own buffers, one for reading, one for writing, I still
> don't see
> > any reentrancy problem?
>
> How big is the write buffer? Unlimited? If I loop around in on_connect
> calling writen with the contents of the 5GB file where will it all go?
> Or for that matter if 100 people connect and each ask to DL a 100MB
> file?

I use std::string as a buffer which grows when needed. This is sufficient
for what I do but may not what others need. You are right that there should
be better control of the buffers and/or an on_flush() method to notify the
observer when the buffer has been (partly) flushed and how much space is
available for another writen().

Boris