I created a C-library with a number of functions that I can call from python using ctypes. I've got my head around some of the simpler ones but I'm stumped by how I pass the right arguments to the following function: foo(double *, double *, void(*f1)(double *, double *, double, struct sys *), void(*f2)(double *, double *, double, struct sys *), struct sys *, double *, double, double, int, int, gsl_rng *) My starting point is setting the .argtypes for the function. I've got the double arrays sorted with POINTER(100*c_double) etc. However, I am stuck on how to pass the function pointers. I have a number of functions (of the form of f1 and f2), which reside in the same library as foo that I would like to pass as arguments to foo. I think I've managed pass the struct sys* pointer ok by using the following code: class sys(Structure): _fields_ = [("alpha", c_double), ("sigma", c_double)] and then using POINTER(sys) as the argtype there. Finally, the gsl_rng is a typical random number generator from the GNU Scientific Library; I don't know where to start here. Can anybody shine some light on the complicated ctypes? Continue reading...
