On Friday, 96/01/26, Murray Lesser wrote to David Noon about "Pl/i
Multithreading" as follows:

ML>     Big question:  What does DETACH do, if anything?  I find the manual
ML> very murky on this point.  A small exposition on the subject would
ML> be appreciated.

Hi Murray,

The DETACH statement cleans up the run-time resources owned by another
thread. However, it cannot do that if the thread is still a candidate
for dispatch. Therefore, you need to kill the thread (STOP THREAD
statement) or wait for it to complete (WAIT THREAD statement) before
you can use DETACH on it. Otherwise, you'd be taking the stack and much
else away from a thread that might be currently executing on another
CPU inside a SMP box. [E.g. a 10-way ES/9000 mainframe, if you've got
the millions to buy one.]

Remember, this language must not only be OS/2-safe, it must be
MVS-safe too.

Regards

Dave


 * KWQ/2 1.2i * User-friendly: (adj.) trivialized, slow, incapable, and boring.
--- Maximus/2 3.01