Use bytes crate for zerocopy and memory re-use (#182)
* Use bytes. Not yet zerocopy everywhere but compiles * Actually zerocopy * Actually zerocopy * Not actually storing the torrent on disk now
This commit is contained in:
Igor Katson
GitHub
parent
3cc9e444b1
commit
c7ed475f54
20 changed files with 182 additions and 95 deletions
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@ -45,7 +45,8 @@ use librqbit_core::{
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peer_id::generate_peer_id,
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spawn_utils::spawn_with_cancel,
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torrent_metainfo::{
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torrent_from_bytes as bencode_torrent_from_bytes, TorrentMetaV1Info, TorrentMetaV1Owned,
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torrent_from_bytes as bencode_torrent_from_bytes, TorrentMetaV1Borrowed, TorrentMetaV1Info,
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TorrentMetaV1Owned,
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},
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};
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use parking_lot::RwLock;
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@ -61,7 +62,7 @@ pub const SUPPORTED_SCHEMES: [&str; 3] = ["http:", "https:", "magnet:"];
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pub type TorrentId = usize;
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fn torrent_from_bytes(bytes: &[u8]) -> anyhow::Result<TorrentMetaV1Owned> {
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fn torrent_from_bytes(bytes: &[u8]) -> anyhow::Result<TorrentMetaV1Borrowed> {
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debug!(
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"all fields in torrent: {:#?}",
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bencode::dyn_from_bytes::<ByteBuf>(bytes)
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@ -120,7 +121,11 @@ impl SessionDatabase {
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.map(|u| u.to_string())
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.collect(),
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info_hash: torrent.info_hash().as_string(),
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torrent_bytes: torrent.info.torrent_bytes.clone(),
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// TODO: this could take up too much space / time / resources to write on interval.
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// Store this outside the JSON file
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//
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// torrent_bytes: torrent.info.torrent_bytes.clone(),
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torrent_bytes: Bytes::new(),
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info: torrent.info().info.clone(),
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only_files: torrent.only_files().clone(),
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is_paused: torrent
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@ -251,8 +256,10 @@ async fn torrent_from_url(
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.await
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.with_context(|| format!("error reading response body from {url}"))?;
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Ok((
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torrent_from_bytes(&b).context("error decoding torrent")?,
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b.to_vec().into(),
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torrent_from_bytes(&b)
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.context("error decoding torrent")?
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.clone_to_owned(Some(&b)),
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b.into(),
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))
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}
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@ -415,7 +422,7 @@ pub fn read_local_file_including_stdin(filename: &str) -> anyhow::Result<Vec<u8>
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pub enum AddTorrent<'a> {
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Url(Cow<'a, str>),
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TorrentFileBytes(Cow<'a, [u8]>),
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TorrentInfo(Box<TorrentMetaV1Owned>),
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TorrentInfo(Box<TorrentMetaV1Owned>, Bytes),
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}
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impl<'a> AddTorrent<'a> {
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@ -448,7 +455,7 @@ impl<'a> AddTorrent<'a> {
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match self {
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Self::Url(s) => s.into_owned().into_bytes(),
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Self::TorrentFileBytes(b) => b.into_owned(),
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Self::TorrentInfo(_) => unimplemented!(),
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Self::TorrentInfo(..) => unimplemented!(),
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}
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}
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}
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@ -752,7 +759,7 @@ impl Session {
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}
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};
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let handshake = h.clone_to_owned();
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let handshake = h.clone_to_owned(None);
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return Ok((
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live,
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@ -877,24 +884,42 @@ impl Session {
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.into_iter()
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.map(|t| ByteBufOwned::from(t.into_bytes()))
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.collect();
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let info = TorrentMetaV1Owned {
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announce: trackers.first().cloned(),
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announce_list: vec![trackers],
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info: storrent.info,
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comment: None,
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created_by: None,
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encoding: None,
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publisher: None,
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publisher_url: None,
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creation_date: None,
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info_hash: Id20::from_str(&storrent.info_hash)?,
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let torrent_bytes = storrent.torrent_bytes;
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let info = if !torrent_bytes.is_empty() {
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torrent_from_bytes(&torrent_bytes)
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.map(|t| t.clone_to_owned(Some(&torrent_bytes)))
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.ok()
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} else {
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None
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};
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let info = match info {
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Some(info) => info,
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None => {
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let info_hash = Id20::from_str(&storrent.info_hash)?;
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debug!(?info_hash, "torrent added before 6.1.0, need to readd");
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TorrentMetaV1Owned {
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announce: trackers.first().cloned(),
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announce_list: vec![trackers],
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info: storrent.info,
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comment: None,
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created_by: None,
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encoding: None,
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publisher: None,
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publisher_url: None,
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creation_date: None,
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info_hash,
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}
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}
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};
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futures.push({
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let session = self.clone();
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async move {
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session
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.add_torrent(
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AddTorrent::TorrentInfo(Box::new(info)),
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AddTorrent::TorrentInfo(Box::new(info), torrent_bytes),
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Some(AddTorrentOptions {
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paused: storrent.is_paused,
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output_folder: Some(
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@ -1041,14 +1066,19 @@ impl Session {
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url
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)
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}
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AddTorrent::TorrentFileBytes(bytes) => (
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torrent_from_bytes(&bytes).context("error decoding torrent")?,
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ByteBufOwned::from(bytes.into_owned()),
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),
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AddTorrent::TorrentInfo(t) => {
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// TODO: this is lossy, as we don't store the bytes.
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(*t, ByteBufOwned(Vec::new().into_boxed_slice()))
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AddTorrent::TorrentFileBytes(bytes) => {
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let bytes = match bytes {
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Cow::Borrowed(b) => ::bytes::Bytes::copy_from_slice(b),
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Cow::Owned(v) => ::bytes::Bytes::from(v),
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};
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(
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torrent_from_bytes(&bytes)
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.map(|t| t.clone_to_owned(Some(&bytes)))
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.context("error decoding torrent")?,
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ByteBufOwned(bytes),
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)
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}
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AddTorrent::TorrentInfo(t, bytes) => (*t, bytes.into()),
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};
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let trackers = torrent
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@ -1081,7 +1111,7 @@ impl Session {
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InternalAddResult {
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info_hash: torrent.info_hash,
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info: torrent.info,
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torrent_bytes: Bytes::from(bytes.0),
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torrent_bytes: bytes.0,
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trackers,
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peer_rx,
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initial_peers: opts
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