Re: [boost] Re: [network] An RFC - updated

From: Iain Hanson (Iain.Hanson_at_[hidden])
Date: 2005-04-22 09:06:17

On Fri, 2005-04-22 at 13:07 +0200, Peter Simons wrote:
> Iain Hanson writes:
> 
>  >> async_read should not take a buffer; instead, the
>  >> callback should receive a pointer to a buffer managed by
>  >> the library that is guaranteed to be valid for the
>  >> duration of the callback. (Not by default, at least.)
> 
>  >> async_write (by default) should not assume that the
>  >> passed buffer stays valid after async_write returns.
> 
>  > This would give a significant performance hit as there
>  > will now be two copies of the data.
> 
> Not if the callback doesn't make any copies.
> 

That is a long way from being the common case.

/ikh