Merge "libbinder_rs: Remove Default from ParcelableHolder" am: c6ff9758

use crate::binder::Stability;

use crate::error::StatusCode;

use crate::parcel::{BorrowedParcel, Parcel, Parcelable};

use crate::{impl_deserialize_for_parcelable, impl_serialize_for_parcelable};

use crate::parcel::{

    BorrowedParcel, Deserialize, Parcel, Parcelable, Serialize, NON_NULL_PARCELABLE_FLAG,

    NULL_PARCELABLE_FLAG,

};

use downcast_rs::{impl_downcast, DowncastSync};

use std::any::Any;

    Parcel(Parcel),

}

impl Default for ParcelableHolderData {

    fn default() -> Self {

        ParcelableHolderData::Empty

    }

}

/// A container that can hold any arbitrary `Parcelable`.

///

/// This type is currently used for AIDL parcelable fields.

/// `ParcelableHolder` is currently not thread-safe (neither

/// `Send` nor `Sync`), mainly because it internally contains

/// a `Parcel` which in turn is not thread-safe.

#[derive(Debug, Default)]

#[derive(Debug)]

pub struct ParcelableHolder {

    // This is a `Mutex` because of `get_parcelable`

    // which takes `&self` for consistency with C++.

    }

}

impl_serialize_for_parcelable!(ParcelableHolder);

impl_deserialize_for_parcelable!(ParcelableHolder);

impl Serialize for ParcelableHolder {

    fn serialize(&self, parcel: &mut BorrowedParcel<'_>) -> Result<(), StatusCode> {

        parcel.write(&NON_NULL_PARCELABLE_FLAG)?;

        self.write_to_parcel(parcel)

    }

}

impl Deserialize for ParcelableHolder {

    fn deserialize(parcel: &BorrowedParcel<'_>) -> Result<Self, StatusCode> {

        let status: i32 = parcel.read()?;

        if status == NULL_PARCELABLE_FLAG {

            Err(StatusCode::UNEXPECTED_NULL)

        } else {

            let mut parcelable = ParcelableHolder::new(Default::default());

            parcelable.read_from_parcel(parcel)?;

            Ok(parcelable)

        }

    }

}

impl Parcelable for ParcelableHolder {

    fn write_to_parcel(&self, parcel: &mut BorrowedParcel<'_>) -> Result<(), StatusCode> {