Mex-file bugs calling a working C++ code

Hi, i've got a really weird problem. I have a C++ code which is working perfectly well when i'm testing it with some inputs.

When I call exactly the same instructions in a mex function, without Matlab inputs, just calling the same code Matlab doesn't stop computing (infinite loop ?).

What is the difference between calling a code in a mex function, or in a classic main.cpp file ?

I really don't get what happens.

Thanks.

[Jonathan Sullivan]

Post your code any maybe we can help.

[ben]

My code looks like that

 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {

vector<double> sk1(256, 0);
vector<vector<double>> keyPMF;
for (int i(0) ; i < 16 ; i++)
  keyPMF.push_back(sk1);

for (int i(0) ; i < 16 ; i++)
  for (int j(0) ; j < 256 ; j++)
    file >> keyPMF[i][j];

double poste(2.66091e-35);

RankKey rankEstimation(keyPMF, poste);
rankEstimation.mergeDistribution(16);
auto estimation = rankEstimation(5);
}

where I read some doubles in "file".

The call which doesn't work in the mexFunction is rankEstimation(5). If I run this code without the mexFunction in a main.cpp, it works. In a mexFunction and called by matlab it doesn't work.

I use GMP library to emulatate large intergers in my functions (i'm on 32 bits win XP) and also use some uint64_t integers.

Thanks if you see something.

Answer 1

[Jan]

MEX-code is code. Code contains bugs. Bugs are known to let programs crash or loop infinitely.

Answer 2

[ben]

Are the recursive calls or the heap different using a mexFunction ?