Deterministic functions

Custom code functions that produce same outputs for same inputs

Model Configuration Pane: Simulation Target

Description

The Deterministic functions parameters specifies which custom code functions are deterministic, that is, always producing the same outputs for the same inputs. If a custom code function is specified as deterministic, then a C Caller or C Function block that calls that function can be used in a For Each subsystem or with continuous sample time, and the block is optimized for use in conditional input branch execution. When a block is optimized for use in conditional input branch execution, it is executed only if it is in the active branch of a Switch or Multiport Switch block, both in simulation and in generated code. See Conditional input branch execution. This parameter is enabled only if Import custom code is selected.

Settings

none (default) | All | By function

None

None of the custom code functions are deterministic.

All

All of the custom code functions are deterministic.

By function

The custom code functions that are deterministic are listed in Specify by function.

Note

If a C Function block references any custom code global variables in its code, then this parameter must be set to All in order for the block to be used in a For Each subsystem or with continuous sample time, or to be optimized for use in conditional input branch execution.

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	No impact
Efficiency	No recommendation
Safety precaution	No recommendation

Programmatic Use

Parameter: DefaultCustomCodeDeterministicFunctions

Type: character vector

Value: "None" | "All" | "ByFunction"

Default: "None"

Version History

Introduced in R2021a