| Application |
All the code executed from the time an executable
program module is invoked until that program, and any programs it
directly or indirectly calls, is terminated. |
| DLL |
An executable module that exports functions,
variable definitions, or both, to other DLLs or DLL applications. |
| DLL application |
An application that references imported functions,
imported variables, or both, from other DLLs. |
| DLL code |
Object code resulting when C source code is
compiled with the DLL or XPLINK compiler options. C++ code is always
DLL code. |
| Executable program (or executable module) |
A file that can be loaded and executed on the
computer. z/OS® supports two types:
- Load module
- An executable residing in a PDS.
- Program object
- An executable residing in a PDSE or in the UNIX file system.
|
| Exported functions or variables |
Functions or variables that are defined in one
executable module and can be referenced from another executable module.
When an exported function or variable is referenced within the executable
module that defines it, the exported function or variable is also
non-imported. |
| Function descriptor |
An internal control block containing information
needed by compiled code to call a function. |
| Imported functions and variables |
Functions and variables that are not defined
in the executable module where the reference is made, but are defined
in a referenced DLL. |
| Non-imported functions and variables |
Functions and variables that are defined in
the same executable module where a reference to them is made. |
| Object code (or object module) |
A file output from a compiler after processing
a source code module, which can subsequently be used to build an executable
program module. |
| Source code (or source module) |
A file containing a program written in a programming
language. |
| Variable descriptor |
An internal control block containing information
about the variable needed by compiled code. |
| Writable Static Area (WSA) |
An area of memory that is modifiable during
program execution. Typically, this area contains global variables
and function and variable descriptors for DLLs. |
| XPLINK application |
An application that is made up of C and/or C++
object modules that were compiled with the XPLINK compiler option.
XPLINK applications are always DLL applications. Since the C/C++ runtime
library for XPLINK is packaged as a DLL, any XPLINK executable module
that calls a C/C++ runtime library is also importing from a DLL. |
| XPLINK code |
Object code resulting when C or C++ source code
is compiled with the XPLINK compiler option. XPLINK code is always
DLL code. |