Allocate page locked memory for output array in mex?

Hello,

I have something like this:

plhs[0] = mxCreateDoubleMatrix(ref_row, ref_col, mxREAL);

I would like to know if it's possible to replace this function with a cudaHostAlloc function instead. Thanks.

Answer 1

[James Lebak]

Justin,

Unfortunately this isn't possible in MATLAB today. The function mxCreateDoubleMatrix returns an mxArray, not a raw pointer, and mxArrays that get returned to MATLAB need to be freed by MATLAB.

[Justin]

Thanks for the response!

-Justin

[Ander Biguri]

Is this still true in 2019?

[James Tursa]

MATLAB still needs to allocate its own memory for mxArray variables. Within a mex routine, that means using API functions or call backs into other MATLAB functions.