Avoid Copying MEX array to C Struct

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Andrew 2014-8-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146857-avoid-copying-mex-array-to-c-struct

回答： Jan 2014-8-10

I am new to MEX. From the "phonebook.c" example, it appears that copying is required from prhs[] to a C struct . . . using either memcpy() or mxDuplicateArray().

In my case, prhs[] will be very large, (megabytes). Copying is not ideal.

Is there a way, using MEX commands, to set a pointer to a C struct to prhs[] and avoid copying??

Thanks in advance.

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Answer 1

Jan 2014-8-10

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146857-avoid-copying-mex-array-to-c-struct#answer_148095

The array duplication is only required, when an input array is modified and replied as output. In all other cases you can use the pointer to the array data inside the Mex file also without any problems.