Choosing LOCAL-STORAGE or WORKING-STORAGE
You can in general use the WORKING-STORAGE SECTION to
define working data that a
client program needs. However, if the program could simultaneously
run on multiple threads, you might instead want to define the data
in the LOCAL-STORAGE SECTION.
About this task
Each thread has access to a separate copy of LOCAL-STORAGE data
but shares access to a single copy of WORKING-STORAGE data.
If you define the data in the WORKING-STORAGE SECTION,
you need to synchronize access to
the data or ensure that no two threads can access it
simultaneously.