calling 2 custom function of the same name

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julia 2011-3-17

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https://ww2.mathworks.cn/matlabcentral/answers/3422-calling-2-custom-function-of-the-same-name

I'd like to know if there is simple way to calling 2 custom functions of the same name. I have one MEX function, and now I need add the new functionality to it, but I do not want to touch any of the existing MEX function, and the interface to all the other users. I just want to write the same name function, add the new functionality, and than call the existing function. I'd like to know if there is any simple way to do it? Thanks.

Julia

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Walter Roberson 2011-3-17

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Put the new interface in to directory that appears first on the path. Have the new interface loadlib() the previous instance and call it.

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julia 2011-3-18

I am working from the Matlab level. Using loadliary(myFunc) in myFunc.m, I got: can not find the head file. I do not have the head file for it. I only have the .mexglx file. How can I load it dynamically? Thanks.

Walter Roberson 2011-3-18

You have to create an appropriate .h file to match it, if you want to use loadlib() . You must already know the calling sequence in order to be able to call it without your addition -- or you must at least be able to reverse-engineer the calling sequence by knowing the standard mechanisms that Matlab uses when calling a mex routine.

You indicate that you do not want to touch the existing mex file, but do you have the source for it? If you do, then you can easily extract the calling sequence from there, and fairly readily build a .h file if you need it.

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