ssPrintf for C-Mex S-Function

Question

Sam 2012-4-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/35912-ssprintf-for-c-mex-s-function

I would like to debug my S-Function using ssPrintf, but if the ssPrintf is between #ifndef MATLAB_MEX_FILE and #endif, there is no message printing out. Even I use mexPrintf or printf.

    static void mdlOutputs(SimStruct *S, int_T tid)
    {
      ssPrintf("message1\n");
    #ifndef MATLAB_MEX_FILE
      ssPrintf("message2\n");
    #endif
      ssPrintf("message3\n");
    }

-------------------------

Output in Command Windows:

message1

message3

-------------------------

Thanks!!!

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Answer 1

Kaustubha Govind 2012-4-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/35912-ssprintf-for-c-mex-s-function#answer_44943

When the S-function is compiled as a MEX-function, the symbol MATLAB_MEX_FILE is always defined, so that line is effectively getting eliminated by the C pre-processor. MATLAB_MEX_FILE is undefined only when generating code using Simulink Coder (formerly Real-Time Workshop), as a non-inlined S-function - ie, there is not TLC file associated with that S-function.