Since Natural is fully reentrant, Natural CICS Interface can be
defined as threadsafe by using the CICS CONCURRENCY(REQUIRED)
attribute. Natural CICS Interface can then execute in the CICS open transaction
environment (OTE) under an open TCB to reduce the QR CPU constraint by moving
tasks to other processors.
Natural CICS Interface provides for extra serialization using CICS ENQ/DEQ when running under an open TCB.
In order to minimize these serialization efforts, it is highly recommended
to use TYPE
=GETM
threads without the THREADS
parameter
specified (or THREADS=0
),
to use the Natural Roll Server rather than roll facilities in CICS.
Notes:
CSTATIC
have to be threadsafe.
%P=S
,
%P=SC
,
*P=L
or
%P=LS
, or the
PGP
profile
parameter with the respective property) or implicitly (that is, when the
NTCICSP
macro parameter SLCALL
is set
to ON
). If these programs are not threadsafe, you can use the
%P=SQ
terminal command or PGP
profile parameter
(with the STDLQ
property set) to call quasi-reentrant user
programs. Additional information on threadsafe programs can be found in the IBM
documentation related to CICS application programming.