mexCallMATLAB in conjunction with OOP

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Yan Shou le 30 Juil 2014

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https://fr.mathworks.com/matlabcentral/answers/144093-mexcallmatlab-in-conjunction-with-oop

Commenté : Yan Shou le 11 Août 2014

Dear all,

I am working on some C codes that requires me to call matlab class objects using mexCallMATLAB, the codes runs and I can use the methods to return values, the problem I am currently experiencing is slow run time. To make the class methods to work with the C codes, I had to use mexCallMATLAB to construct the objects (due to the purpose of the program, I had to construct individual objects the same length as an input, so that each object deal with a scalar).

After the group of class objects are constructed, it it passed into another C function to be used to call the object methods using mexCallMATLAB again, with additional scalar inputs. I am able to destroy the inputs and outputs of mexCallMATLAB that are not class objects containing methods.

So my question is, is there anyway to improve my slow runtime? Am I doing the class construction the way it's supposed to? And how can I use mxDestroyArray (or other function?) to free the memory from the class objects?

Thanks for your attention and time,

best regards,

Yan

P.S. Here are parts of my codes:

/*-----------part to construct methods----------------*/

mxArray *initobjout[2], *estimclassout[1], *estimout[m];

for ( i=0; i < m; i++) {

                initobjout[0] = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, mxREAL);
                initobjout[1] = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, mxREAL);
                *mxGetPr(initobjout[0]) = y[i] ;
                *mxGetPr(initobjout[1]) = someparameter[0] ;
                mexCallMATLAB(1, estimclassout, 2, initobjout, "SomeEstimOut"); 
// note: SomeEstimOut is a class object m-file 
                estimout[i] = estimclassout[0] ;
//                 mxDestroyArray(estimclassout[0]);
                mxDestroyArray(initobjout[0]);
                mxDestroyArray(initobjout[1]);
            }

/*-----------After above part, estimout is passed into another C function to be used in the following part ----------------*/

mxArray *params[3], *xout[2];

double ph, pv;

// only included some variables' types

        params[0] = *estimout;
        params[1] = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, mxREAL);
        params[2] = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, mxREAL);
        ph = *w;
        pv = *v;
        *mxGetPr(params[1]) = ph;
        *mxGetPr(params[2]) = pv;
        mexCallMATLAB(2, xout, 3, params, "estim");
        *zh = *mxGetPr(xout[0]) ;
        *zv = *mxGetPr(xout[1]) ;
        mxDestroyArray(xout[0]);
        mxDestroyArray(xout[1]);
//         mxDestroyArray(params[0]);
        mxDestroyArray(params[1]);
        mxDestroyArray(params[2]);
/*--------------------------------------------------*/