Struct QueryLatch 

pub struct QueryLatch<'tcx> {
    pub info: Arc<Mutex<QueryLatchInfo<'tcx>>>,
}

Fields

info: Arc<Mutex<QueryLatchInfo<'tcx>>>

Implementations

impl<'tcx> QueryLatch<'tcx>

fn new() -> Self

pub fn wait_on( &self, qcx: impl QueryContext<'tcx>, query: Option<QueryJobId>, span: Span, ) -> Result<(), CycleError<QueryStackDeferred<'tcx>>>

Awaits for the query job to complete.

fn wait_on_inner( &self, qcx: impl QueryContext<'tcx>, waiter: &Arc<QueryWaiter<'tcx>>, )

Awaits the caller on this latch by blocking the current thread.

fn set(&self)

Sets the latch and resumes all waiters on it

pub fn extract_waiter(&self, waiter: usize) -> Arc<QueryWaiter<'tcx>>

Removes a single waiter from the list of waiters. This is used to break query cycles.

Trait Implementations

impl<'tcx> Clone for QueryLatch<'tcx>

fn clone(&self) -> QueryLatch<'tcx>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for QueryLatch<'tcx>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

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: 8 bytes