Struct OnDiskCache 

pub struct OnDiskCache {
    serialized_data: RwLock<Option<Mmap>>,
    file_index_to_stable_id: FxHashMap<SourceFileIndex, EncodedSourceFileId>,
    file_index_to_file: Lock<FxHashMap<SourceFileIndex, Arc<SourceFile>>>,
    query_values_index: FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>,
    side_effects_index: FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>,
    alloc_decoding_state: AllocDecodingState,
    syntax_contexts: FxHashMap<u32, AbsoluteBytePos>,
    expn_data: UnhashMap<ExpnHash, AbsoluteBytePos>,
    hygiene_context: HygieneDecodeContext,
    foreign_expn_data: UnhashMap<ExpnHash, u32>,
}

Provides an interface to incremental compilation data cached from the previous compilation session. This data will eventually include the results of a few selected queries (like typeck and mir_optimized) and any side effects that have been emitted during a query.

Fields

serialized_data: RwLock<Option<Mmap>>

file_index_to_stable_id: FxHashMap<SourceFileIndex, EncodedSourceFileId>

file_index_to_file: Lock<FxHashMap<SourceFileIndex, Arc<SourceFile>>>

query_values_index: FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>

For query dep nodes that have a disk-cached return value, maps the node index to the position of its serialized value in serialized_data.

side_effects_index: FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>

For DepKind::SideEffect dep nodes, maps the node index to the position of its serialized QuerySideEffect in serialized_data.

alloc_decoding_state: AllocDecodingState

syntax_contexts: FxHashMap<u32, AbsoluteBytePos>

expn_data: UnhashMap<ExpnHash, AbsoluteBytePos>

hygiene_context: HygieneDecodeContext

foreign_expn_data: UnhashMap<ExpnHash, u32>

Implementations

impl OnDiskCache

pub fn new(sess: &Session, data: Mmap, start_pos: usize) -> Result<Self, ()>

Creates a new OnDiskCache instance from the serialized data in data.

The serialized cache has some basic integrity checks, if those checks indicate that the on-disk data is corrupt, an error is returned.

pub fn new_empty() -> Self

pub fn close_serialized_data_mmap(&self)

Release the serialized backing Mmap.

pub fn serialize(tcx: TyCtxt<'_>, encoder: FileEncoder) -> FileEncodeResult

Serialize the current-session data that will be loaded by OnDiskCache in a subsequent incremental compilation session.

pub(crate) fn load_side_effect( &self, tcx: TyCtxt<'_>, dep_node_index: SerializedDepNodeIndex, ) -> Option<QuerySideEffect>

Loads a QuerySideEffect created during the previous compilation session.

pub fn loadable_from_disk(&self, dep_node_index: SerializedDepNodeIndex) -> bool

Returns true if there is a disk-cached query return value for the given node.

pub fn try_load_query_value<'tcx, T>( &self, tcx: TyCtxt<'tcx>, dep_node_index: SerializedDepNodeIndex, ) -> Option<T>

where T: for<'a> Decodable<CacheDecoder<'a, 'tcx>>,

Returns the disk-cached query return value for the given node, if there is one.

fn load_indexed<'tcx, T>( &self, tcx: TyCtxt<'tcx>, dep_node_index: SerializedDepNodeIndex, index: &FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>, ) -> Option<T>

where T: for<'a> Decodable<CacheDecoder<'a, 'tcx>>,

fn with_decoder<'a, 'tcx, T, F: for<'s> FnOnce(&mut CacheDecoder<'s, 'tcx>) -> T>( &self, tcx: TyCtxt<'tcx>, pos: AbsoluteBytePos, f: F, ) -> T

where T: Decodable<CacheDecoder<'a, 'tcx>>,

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 344 bytes