No-copy read object property from mex c++

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Rasmus Damgaard Nielsen
评论： Rasmus Damgaard Nielsen 2019-5-7
How do i read properties of object arrays through the mex api? Right now i am using getProperty, which is an awfull function. Despite the name, it copies the object, reads the property, and then throw the object away. Then i ask for the next property of the object, the object is copied again and so-on. The c++ mex api was made for high performance supporting code, so of cause there should be some way of doing no-copy reads. Struct support this, and the old API support this, so how to do it in the new API?

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回答（1 个）

James Tursa
James Tursa 2019-5-7
编辑：James Tursa 2019-5-7
There is no official API method to do this with the C API. You have to resort to unofficial hacks. E.g., see this FEX submission for mxGetProperty and mxSetProperty replacements:
https://www.mathworks.com/matlabcentral/fileexchange/30672-mxgetpropertyptr-mxsetpropertysdc-c-mex-functions
But I don't know if these will even work with the new C++ API.
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Rasmus Damgaard Nielsen
Rasmus Damgaard Nielsen 2019-5-7
Well... Do you know any way to combine functions from the two API's? MATLAB is quite explicit about the mutual exclusivity...

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