GDSX (Extended General Device Support) Manual

About This Manual
Extended General Device Support (GDSX) Manual—529931-001
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Operations
References
See Section 1 for an overview of GDSX. Unless you are already very familiar with
GDSX, it will probably be helpful to do the tutorial in Sections 4 through 7. If your
application has or will have a DEVICE^HANDLER only, you need only Sections 4 and
5. If your DEVICE^HANDLER is or will be multithreaded, you might find Sections 6 and
7 helpful.
See Section 2 for prerequisites for development; alternatives to using GDSX; general
guidelines on design and development, including information on converting existing
applications; D-series features; instructions for coding, compiling, binding, and testing;
memory pool, calling, and space restrictions; basic internal control flow; fault tolerance;
file system errors; EMS filters; semaphores; linked lists; configuration parameters;
tracing; GDSX internals; and the USAMPLE example program. For information on
running and managing GDSX, see Section 3.
Operations
Readers responsible for operations might need to perform the following tasks:
•
Determine what hardware and software are necessary to use GDSX for a given
application.
•
Understand the restrictions on communication between GDSX and other
processes.
•
Configure GDSX to run converted or unconverted, and at a low PIN or a high PIN.
•
Run GDSX with different options and parameters, and change configuration
parameter values after creation time.
•
Use SCF to configure and manage GDSX objects, and to obtain statistical data on
GDSX operations.
•
Interpret GDSX abend, trap, fault, EMS event, and configuration error messages.
References
See Section 1 for an overview of GDSX.
Unless you are already familiar with GDSX, it is helpful to do parts of the tutorial.
Sections 4 and 6 of the tutorial contain step-by-step instructions on configuring and
running an example program and using SCF for management of GDSX objects. You
might wish to skip Sections 5 and 7 on DEVICE^HANDLER and LINE^HANDLER
design.
See Section 3 for material on running GDSX, dealing with space usages and
limitations, controlling configuration parameter values, managing objects by means of
SCF, interpreting warning and error messages, and gathering information if GDSX
abends.