cuda::experimental::places::partition_fn_t

using cuda::experimental::places::partition_fn_t = void (*)(pos4 *result, pos4 data_coords, dim4 data_dims, dim4 grid_dims)

Function type for computing executor placement from data coordinates.

Uses an out-pointer convention so the signature is trivially representable in FFI frameworks (ctypes, cffi, Rust) that cannot return C structs.