I am trying to call a DLL function inside a for loop, but Matlab crashes on the second loop iteration. I think the issue has to do with the arrays of structs the function requires, but I am not sure. The DLL function I am working with has the following arguments: a 1D array of data, the array size, and two 2 arrays of structures. I am trying to access this function via calllib inside for loop. My code looks like the following. Am I doing something wrong? Am I missing something? Is there a better way to go about this? (I feel like there should be!)
tmp(1).a = 0;
tmp(2).a = 0;
tmp(3).a = 0;
tmp(4).a = 0;
structs1 = libpointer('my_struct', tmp);
structs2 = libpointer('my_struct', tmp);
a1s = zeros(N,4);
a2s = zeros(N,4);
for n = 1:N
calllib(mylib, 'my_func', new_data, length(new_data), structs1, structs2);
for m = 1:4
tmp_libptr = structs1 + (m-1);
a1s(n,m) = tmp_libtr.Value.a;
tmp_libptr = structs2 + (m-1);
a2s(n,m) = tmp_libtr.Value.a;
end
end
Also, as a newly discovered oddity. If I run this script from the command window, Matlab crashes on the first call to calllib. If I copy and paste segments of the code individually, the code runs through the first iteration fine, but crashes on iteration 2. For n = 1, I can run calllib multiple times over by copying and pasting it into the Command Window.
