Function rpgffi::tuplesort_begin_heap

pub unsafe extern "C" fn tuplesort_begin_heap(
    tupDesc: TupleDesc, 
    nkeys: c_int, 
    attNums: *mut AttrNumber, 
    sortOperators: *mut Oid, 
    sortCollations: *mut Oid, 
    nullsFirstFlags: *mut bool_, 
    workMem: c_int, 
    randomAccess: bool_
) -> *mut Tuplesortstate