Re: Container reqs

[Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>]

Barry Kelly <dynagen@eircom.net> writes:

> In article <9qi2c8$gpb$1@nh.pace.co.uk>
> 	"Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>
> wrote:
> 
> > If you wish to keep the realtime/embedded crowd happy, you need to have
> > task-safe versions.
> 
> C++ can implement task safety using the RAII (resource aquisition is
> initialization) idiom, which eliminates the need for creating a whole
> new type for task-safe access to structures.

It does not "eliminate the need". If _all_ types in the library use
initialization to acquire an appropriate lock, then _all_ types in the
library suffer from that overhead, which can be significant.

The point is to provide types that are as fast as possible, and only
add the task lock overhead if absolutely necessary. Only the user can
tell whether they need the task lock

-- 
-- Stephe