extern "c" fn sysctl([*]const c_int, c_uint, ?*anyopaque, ?*usize, ?*anyopaque, usize) callconv(.C) c_int
name: [*]const c_int,
namelen: c_uint,
oldp: ?*anyopaque,
oldlenp: ?*usize,
newp: ?*anyopaque,
newlen: usize,