Merge "Use usize instead of c_long in Rust code"

use std::convert::{TryFrom, TryInto};

use std::ffi::c_void;

use std::mem::{self, ManuallyDrop, MaybeUninit};

use std::os::raw::{c_char, c_ulong};

use std::os::raw::c_char;

use std::ptr;

use std::slice;

unsafe extern "C" fn serialize_element<T: Serialize>(

    parcel: *mut sys::AParcel,

    array: *const c_void,

    index: c_ulong,

    index: usize,

) -> status_t {

    // c_ulong and usize are the same, but we need the explicitly sized version

    // so the function signature matches what bindgen generates.

    let index = index as usize;

    let slice: &[T] = slice::from_raw_parts(array.cast(), index + 1);

    let mut parcel = match BorrowedParcel::from_raw(parcel) {

unsafe extern "C" fn deserialize_element<T: Deserialize>(

    parcel: *const sys::AParcel,

    array: *mut c_void,

    index: c_ulong,

    index: usize,

) -> status_t {

    // c_ulong and usize are the same, but we need the explicitly sized version

    // so the function signature matches what bindgen generates.

    let index = index as usize;

    let vec = &mut *(array as *mut Option<Vec<MaybeUninit<T>>>);

    let vec = match vec {

        Some(v) => v,