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

From: Peter Simons (simons_at_[hidden])
Date: 2005-04-22 06:07:34

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.

Peter