File: helloworld.py

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mpi4py 4.1.0-4
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import ctypes
import pathlib

_libdir = pathlib.Path(__file__).resolve().parent

MPI_Fint = ctypes.c_int
lib = ctypes.CDLL(_libdir / "libhelloworld.so")
lib.sayhello_.restype = None
lib.sayhello_.argtypes = [ctypes.POINTER(MPI_Fint)]


def sayhello(comm):
    comm_f = MPI_Fint(comm.py2f())
    lib.sayhello_(comm_f)