Can I use coder.ceval to call other matlab coded function with dynamic coder::array<> in interface?

Question

Adam Przybyla 2022-2-23

0
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https://ww2.mathworks.cn/matlabcentral/answers/1656890-can-i-use-coder-ceval-to-call-other-matlab-coded-function-with-dynamic-coder-array-in-interface

回答： Infinite_king 2024-3-25

Hi,

Is it possible to split bigger MATLAB project into smaller modules, run CODER on those parts to produce static libraries, and later 'glue' it in MATLAB to produce executable binary?

I've tried with coder.ceval but the problem is with passing dynamic arrays.

Very simplified example:

foo.m function is my 'module'

function y = foo(first, size)
    y = zeros(size, 1, 'single');
    y(:) = first + single((0:size-1));
end

generated by CODER interface for this function would be

void foo(float b_first, int size, coder::array<float, 1U> &y);

call foo() in main.m function

function ret = main()
    if coder.target('MATLAB')
        y = foo(10, 8);
    else
        coder.cinclude('foo.h');
        % ????
    end
    
    ret = sum(y);
end

I successfully built executable binary for this example by using static size arrays, but in some cases, it won't be applicable or could be error-prone.

Thanks in advace.

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Answer 1

Infinite_king 2024-3-25

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1656890-can-i-use-coder-ceval-to-call-other-matlab-coded-function-with-dynamic-coder-array-in-interface#answer_1430601

Hi Adam Przybyla,

It is possible to split the entire code into modules and then generate code for these modules using MATLAB Coder or any other Coder products. However, in all cases, it may not be possible to use a MATLAB script to combine all these libraries. I would recommend using C++ to combine all libraries and generate a single static library.

"Coder::array" is a C++ template that should be used to call functions that will return or take arrays of variable size as input or output in C++ code that was generated using MATLAB Coder.

For more information on how to use Dynamically Allocated C++ Arrays, refer to the following resource, https://www.mathworks.com/help/coder/ug/use-dynamically-allocated-cpps-arrays-in-generated-function-interfaces.html

Hope this is helpful.