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from mpi4py import MPI
import mpiunittest as unittest
try:
import cffi
except ImportError:
cffi = None
class TestCFFI(unittest.TestCase):
mpitypes = [
MPI.Datatype,
MPI.Request,
MPI.Info,
MPI.Errhandler,
MPI.Group,
MPI.Win,
MPI.Op,
MPI.File,
MPI.Message,
MPI.Comm,
]
objects = [
MPI.DATATYPE_NULL,
MPI.INT,
MPI.DOUBLE,
MPI.REQUEST_NULL,
MPI.INFO_NULL,
MPI.INFO_ENV,
MPI.ERRHANDLER_NULL,
MPI.ERRORS_RETURN,
MPI.ERRORS_ARE_FATAL,
MPI.GROUP_NULL,
MPI.GROUP_EMPTY,
MPI.WIN_NULL,
MPI.OP_NULL,
MPI.SUM,
MPI.MIN,
MPI.MAX,
MPI.FILE_NULL,
MPI.MESSAGE_NULL,
MPI.MESSAGE_NO_PROC,
MPI.COMM_NULL,
MPI.COMM_SELF,
MPI.COMM_WORLD,
]
def testHandleAddress(self):
ffi = cffi.FFI()
typemap = {ffi.sizeof('int'): 'int',
ffi.sizeof('void*'): 'void*'}
typename = lambda t: t.__name__.rsplit('.', 1)[-1]
for tp in self.mpitypes:
handle_t = typemap[MPI._sizeof(tp)]
mpi_t = 'MPI_' + typename(tp)
ffi.cdef("typedef %s %s;" % (handle_t, mpi_t))
for obj in self.objects:
if isinstance(obj, MPI.Comm):
mpi_t = 'MPI_Comm'
else:
mpi_t = 'MPI_' + typename(type(obj))
oldobj = obj
newobj = type(obj)()
handle_old = ffi.cast(mpi_t+'*', MPI._addressof(oldobj))
handle_new = ffi.cast(mpi_t+'*', MPI._addressof(newobj))
handle_new[0] = handle_old[0]
self.assertEqual(oldobj, newobj)
def testHandleValue(self):
ffi = cffi.FFI()
typemap = {ffi.sizeof('uint32_t'): 'uint32_t',
ffi.sizeof('uint64_t'): 'uint64_t',}
for obj in self.objects:
uintptr_t = typemap[MPI._sizeof(obj)]
handle = ffi.cast(uintptr_t+'*', MPI._addressof(obj))[0]
self.assertEqual(handle, MPI._handleof(obj))
if cffi is None:
del TestCFFI
if __name__ == '__main__':
unittest.main()
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