I have an external "C" DLL function which returns a pointer to an byte array as well as the number of array elements (bytes)
DLLEXPORT void dllfun(void **a, int *n);
Now I want to use
to be able to call dllfun via f:
such that being able to access the array a.
I am aware that if I could define the array a inside Mathematica prior to the call:
n=77; a=NETNew["System.Byte", n]; f[a,n]
then the dll function could access the array and fill it with some values.
The problem is that the dll function uses ist own memory management such that I can not pass memory allocated by Mathematica.
If it would help I have the info of the array size n already available in advance to the call.
It seems to me like I would need a version of NETNew for declaring a pointer to an array with known size n without actually reserving the memory for it.
Any hints welcome