How to optimize the coder generated code to use pointer as input instead of structure ?

Question

Liang MA 2013-11-4

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/104842-how-to-optimize-the-coder-generated-code-to-use-pointer-as-input-instead-of-structure

编辑： Walter Roberson 2013-12-26

My matlab function is this :

[staticAlign_output, per_var] = staticAlignment(staticAlign_input, staticAlign_output, detn_reports, per_var, sa_cals)

Therefore the auto generated c code for this function is like this:

void staticAlignment(const staticAlign_Input_T staticAlign_input,
                     staticAlign_Output_T *staticAlign_output, 
                     const Detection_Reports_T detn_reports , Per_Var_T *per_var, const
                     Cals_Static_Align_T sa_cals)

So it calls the sttucture Detection_Reports_T as the input. Since this is a huge structure, we prefer to use pointer instead of structure.

Is there a command to fix this ?

Thanks

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Answer 1

Fred Smith 2013-11-7

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https://ww2.mathworks.cn/matlabcentral/answers/104842-how-to-optimize-the-coder-generated-code-to-use-pointer-as-input-instead-of-structure#answer_114530

If you make detn_output an output as well, then it will be passed by pointer.

What version of MATLAB Coder are you using? In the latest release (I believe), all structures should always be passed by reference.

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Liang MA 2013-12-19

Right now , we just have to put it as output as well so that we can have pointer used. In 2013B, it is still not passing structures by reference yet.

Ketan 2013-12-26

编辑：Ketan 2013-12-26

There is configuration option "PassStructByReference" that controls this behavior for entry-point functions in R2013b. Search for "PassStructByReference" on the following page for more info:

http://www.mathworks.com/help/coder/ref/coder.codeconfigclass.html

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