Specify whether one of an S-function's input ports can be overwritten by one of its output ports
void ssSetInputPortOverWritable(SimStruct *S, int_T port, int_T isOverwritable)
SimStruct representing an S-Function block.
Index of the input port whose overwritability is being set.
Value specifying whether
ssSetNumInputPorts) to specify whether
port is overwritable by one of the S-function's output ports.
The Simulink® engine uses this setting as one criterion in determining whether one
of the output ports of this S-function can share memory with
isOverwritable=1 and the other
criteria are satisfied, the engine allocates a common block of memory for the input
port and one of the S-function's output ports, thus reducing simulation memory
requirements. The default is
isOverwritable=0, which means that
port cannot share memory with any of the S-function's output
If you set an input port to be overwritable, you must also specify that the
input port and at least one of the S-function's output ports are reusable. Use
ssSetOutputPortOptimOpts to do this.