User guide

17-7
Using the PLI
• The PLI specifications for the user-defined system task or system
function. These specifications must include the call function. For
user-defined system functions, they must also include the size of
the return value.
These specifications can also include the check and
miscellaneous functions. There are a number of other PLI
specifications, such as the one that allows the entering of the
user-defined system task on the command line. You can also
enter these specifications on a line in the PLI table file.
• The ACC capabilities that you want to enable for the functions,
particularly the call function, for the user-defined system task or
system function. When you specify ACC capabilities you specify
the types of ACC operations that the ACC routines will perform
and where in the design they can perform these operations.
Entering ACC capabilities to limit ACC routine scope and
operations is optional but recommended to enhance
performance.
The syntax for a line in a PLI table file is as follows:
$name PLI_specifications [ACC_capabilities]
Here:
$name
The name of the user-defined system task or system function
PLI_specifications
One or more specifications such as the name of the C function
VCS calls when it executes the user-defined system task or
system function. For a list of valid PLI specifications, see "PLI
Specifications" on page 17-9.