Guardian Application Conversion Guide

Communicating With a Named High-PIN Process
System Compatibility
C–8 096047 Tandem Computers Incorporated
Communicating With a
Named High-PIN
Process
An unconverted process running on a D-series system can communicate with a named
high-PIN process as described in the following paragraphs. However, to communicate
with an unnamed high-PIN process, the process must be converted.
Figure C-7 shows an unconverted process and a named high-PIN process.
Figure C-7. Communicating With a Named High-PIN Process
High PINs: ≥256
Low PINs: 0 – 254
Unconverted
Process
Named
Process
An unconverted process can open a named high-PIN process using the OPEN
procedure. The OPEN procedure uses the process name to determine the process (or
process pair) and does not require the CPU and PIN values from the process ID:
CALL OPEN (process^file^name,
file^number);
After opening the high-PIN process, the unconverted process can send requests using
a procedure such as WRITE[X] or WRITEREAD[X]. These procedures do not require
any conversion to send or receive messages from high-PIN processes.
An unconverted process can close a high-PIN process using the CLOSE procedure:
CALL CLOSE (file^number);