Numba supports calling C functions through CFFI and ctypes.
Numba supports calling C functions wrapped with CFFI:
from numba import jit
from cffi import FFI
ffi = FFI()
ffi.cdef('double sin(double x);')
# loads the entire C namespace
C = ffi.dlopen(None)
c_sin = C.sin
@jit(nopython=True)
def cffi_sin_example(x):
return c_sin(x)
Numba also supports calling C functions wrapped with ctypes:
# This example doesn't work on Windows platforms
from ctypes import *
from math import pi
from numba import jit, double
proc = CDLL(None)
c_sin = proc.sin
c_sin.argtypes = [c_double]
c_sin.restype = c_double
@jit
def use_c_sin(x):
return c_sin(x)
ctype_wrapping = CFUNCTYPE(c_double, c_double)(use_c_sin)
@jit
def use_ctype_wrapping(x):
return ctype_wrapping(x)