Re: Multiprocessing in LispWorks

>>>>> On Thu, 3 Apr 2014 12:07:29 -0700, Paul Rosenbloom said:
> 
> I know about LispWorks capability for light-weight thread-based symmetric
> multiprocessing, but was wondering whether there is also a capability for
> heavier-weight multiprocessing (where global variables are distinct in each
> process).  When running extensive experiments over multiple variations of
> the same program, it would be useful to be able to run these simultaneously
> in separate cores without them interfering with each other. — Paul R.

You can achieve that by binding the "global" variables to a different value in
each thread.

For example, rather than having a single global value like

(defvar *my-results* (make-hash-table))

you can use

(defvar *my-results*)

and then wrap

(let ((*my-results* (make-hash-table)))
  ...)

around the function that you want to run in a separate thread.

See also http://www.lispworks.com/documentation/lw61/LW/html/lw-122.htm

-- 
Martin Simmons
LispWorks Ltd
http://www.lispworks.com/

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