RE: Crazy little web project

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Hans Boldt
Sent: Tuesday, July 20, 2004 9:07 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Crazy little web project

>But an HTTP server in RPG? Well, one bottleneck you'll likely run into
>is the fact that RPG has limitations running in a threaded environment.
>RPG programs are generally non-reentrant. The best you can do is code
>the THREAD(*SERIALIZE) option which ensures that a module is active in
>only one thread at one time. Threading is normally needed in a server
>program to give speedy response to each request.

An even quicker way to shuttle the execution of the http request to a worker
thread is to have a set of prestarted worker jobs running on the system.
Then release either a mutex or LOCKSL type lock to signal the worker job to
start running the request string that has been posted to a preset location
in a shared user space.

Of course, to handle the sort of syncronization required when running
multiple threads or jobs, you have to have a language that supports data
structure constructors and destructors ( you use the destructor to auto
release your mutex locks.  The constructor is used to auto acquire the
lock. ).  Since neither C or RPG provide that support, both will eventually
come up short in this sort of a project.  Better to use C++.

-Steve