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From: Brock Peabody (brock.peabody_at_[hidden])
Date: 2003-08-06 18:31:41

> -----Original Message-----
> From: boost-bounces_at_[hidden]
> On Behalf Of E. Gladyshev
> Sent: Wednesday, August 06, 2003 5:08 PM
> To: Boost mailing list
> Subject: RE: [boost] GUI/GDI template library
> --- Brock Peabody <brock.peabody_at_[hidden]>
> wrote:
> > cycle or two of our recursive (I thought they called
> > it iterative?)
> They do call it iterative. However in the C++ world
> iteration is like enumeration while recursion is a
> process where typically the input for the next call is
> derived from the result of the current call. So I
> called it recursive design just for fun. :)
> Yes, it is iterative design. Thanks.

I was just joking around, I know what you meant :)

> >
> > (2) I'd say the library should be no less thread
> > safe than the
> > underlying API. Some APIs may be inherently
> > thread-unsafe (MFC for
> > instance).
> Does it mean that the library should be thread safe
> because an underlying API could be multi- threaded? I
> think there are two options.

I just meant that if the underlying library was unsafe there would
probably not be anything we could do about it.

> 1. The layer 1 must appear as one threaded API that
> has a message queue (ala win32). In other words all
> calls from layer 1 to a library object has to be done
> in the context of the thread that created the object
> (ala win32).
> 2. The layer 1 can call a library object in the
> context of an internal thread.
> What option do think is better? I think this issuse
> will have a significant impact on our design.

I think it would be too complicated to pass messages across thread
boundaries. Is that what you were talking about?

> > (3) Use function objects ala boost::function<>?
> Sorry, I meant. Do we need to be able to send
> messages at layer 1/2 (ala SendMessage/PostMessage)?
> I don't think we need it at all, everything could be a
> function call?

I agree. I like the function call syntax better. There may be API's
that aren't message based, in which case we would have to emulate it
somehow if we were to use them.


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