Disallow inheritance of Inf sample
time
Prohibits the S-Function block that references this S-function
from inheriting a sample time of Inf. The SS_OPTION_DISALLOW_CONSTANT_SAMPLE_TIME option
applies only to S-functions that use block-based sample times.
Note
If you have Simulink®
Coder™, and the S-function declares
the number of sample times as PORT_BASED_SAMPLE_TIMES,
it will not inherit a sample time of Inf unless
it specifies the SS_OPTION_ALLOW_CONSTANT_PORT_SAMPLE_TIME option.
If you have Simulink Coder, note:
If the S-function specifies this option and inherits
a sample time of Inf, the Simulink
Coder product
determines how to generate code for the block based on if the block
is invariant.
A block is invariant if all of its ports' signals are invariant. A signal is invariant if it has a constant value during the entire simulation. A constant block sample time does not guarantee all the ports' signals are invariant. For more information, see Inline Invariant Signals (Simulink Coder).
If the block is not invariant, the Simulink
Coder product
generates code only in the model_initialize function.
If the block is invariant, the Simulink
Coder product eliminates
the block’s code altogether.
See sfix_fir.cpp for
an example.