GDSX Manual

Design and Development
Extended General Device Support (GDSX) Manual–134303
2-40
The User Source File
The User Source File
The user source code file must contain all the user exits (procedures) called by
TSCODE. (See Section 9, “User Exit Descriptions.”) Your user code may have been
prepared by modifying USKELEX, USKELEXC, or USAMPLE, or your coding may
have started with USKEL, the user code skeleton file (containing user exit stubs)
supplied in the GDSX installed subvolume.
User code must source in certain sections of the DCCBDECS and EXTDECS0 files, as
well as the PEXTGDS file. (See "User Code Declarations" on page 2-16 for details.)
User code must also source in the DCB and LCB control structures. There are four
ways to do this:
Figure 2-3. GDSX Generation Process
Runnable
GDSX
Object
User Source
File
BINDER
IN File
DCCBDECS
TAL
USCODE
BIND
TSCODEPEXTGDS
?SOURCE ?SOURCE
?SOURCE
(Optional)
Installed Subvolume
ULHDECS
or
USKELDEC