Specify user data
void ssSetUserData(SimStruct *S, void *data)
SimStruct representing an S-Function block.
Stores a pointer to the memory location containing the S-function's
user data. To avoid memory leaks, the S-function must free this memory
location during the call to
An S-function containing user data must perform the following steps.
Allocate memory for the user data, using a customized structure to store more complicated data.
mdlInitializeSizes, to ensure the Simulink® engine
always calls the
Store the pointer to the memory location in the user
data, using a call to
retrieve the pointer to the memory location and free the memory.
See Creating Run-Time Parameters from Multiple S-Function Parameters for an example that uses user data in conjunction with run-time parameters.
You cannot access user data from within a Target Language Compiler
(TLC) file. Use DWork vectors instead of user data if you need to
write a TLC-file to inline the S-function during code generation with Simulink Coder™.
For an example using DWork vectors, see