RE: Multithreading (was 'more good iseries news')

["Andy Nolen-Parkhouse" <aparkhouse@xxxxxxxxxxxx>]

> On Mon, 14 Jan 2002, Andy Nolen-Parkhouse wrote:
>
> > A standard, single-threaded program will not take advantage of more
than
> > one processor.  This would include the standard RPG/COBOL
interactive
> > and batch programs found in most older systems.  Multi-threaded
> > applications should be able to take advantage of multiple
processors,
> > although I'm a little over my head here as to specifics.  I don't
know
> > whether the HTTP server supports multiple threads.
>
> I'm unsure of the capabilities of *new* RPG programs to take advantage
of
> multi-threading.  Multi-threaded apps have ops such as
thread_create(),
> thread_lock(), thread_destroy(), etc. (or some variation).  RPG
doesn't
> have these ops as far as I know.  Perhaps the compiler can do some
fancy
> magic to enable threading but it seems unlikely.
>

You're correct.  If anyone took my statements above to imply that you
could create a multithreaded app solely using modern RPG, that was never
my intent.

>From the Infocenter:

The iSeries system now supports multithreading. ILE RPG does not
directly support initiating or managing program threads. However, ILE
RPG procedures can run as threads in multithreaded environments. If you
want to call an ILE RPG procedure in a multithreaded application, you
must ensure that the ILE RPG procedure is threadsafe. You must also
ensure that any system functions that your procedure accesses are also
threadsafe.

Regards,
Andy Nolen-Parkhouse