| import cffi | |
| ffi = cffi.FFI() | |
| ffi.cdef("""int my_algo(int); extern "Python" int f(int);""") | |
| ffi.set_source("_extern_python_cffi", """ | |
| static int f(int); | |
| static int my_algo(int n) { | |
| int i, sum = 0; | |
| for (i = 0; i < n; i++) | |
| sum += f(i); | |
| return sum; | |
| } | |
| """) | |
| ffi.compile() | |
| from _extern_python_cffi import ffi, lib | |
| @ffi.def_extern() | |
| def f(n): | |
| return n * n | |
| assert lib.my_algo(10) == 0+1+4+9+16+25+36+49+64+81 |