On 2/5/2021 11:06 AM, Steve Smith wrote:
SYNCH could replace CALL, but the reasons for doing so are pretty esoteric,
and 99.99% of application programmers never have, and never need hear about
it (I realize the grammar is off, but I liked it this way... sorry).
My point is that LINK replaces SYNCH/LOAD/CALL/DELETE, not just
LOAD/CALL/DELETE.
SYNCH runs a subroutine in a new PRB. In that subroutine you LOAD the
module and pass control to it. When it returns, you issue a DELETE for
the module and then an SVC 3. The new RB is deleted, and control resumes
at the instruction following the SYNCH macro.
LINK does all of this in one macro.
Creating a new RB to run some code is not esoteric at all. It's
fundamental to how MVS works.
--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
https://www.phoenixsoftware.com/
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