pub struct InternStrategyQuery;
Implementations§
Source§impl InternStrategyQuery
impl InternStrategyQuery
Sourcepub fn in_db(self, db: &dyn LoweringGroup) -> QueryTable<'_, Self>
pub fn in_db(self, db: &dyn LoweringGroup) -> QueryTable<'_, Self>
Get access to extra methods pertaining to this query. You can also use it to invoke this query.
Source§impl InternStrategyQuery
impl InternStrategyQuery
Sourcepub fn in_db_mut(self, db: &mut dyn LoweringGroup) -> QueryTableMut<'_, Self>
pub fn in_db_mut(self, db: &mut dyn LoweringGroup) -> QueryTableMut<'_, Self>
Like in_db
, but gives access to methods for setting the
value of an input. Not applicable to derived queries.
§Threads, cancellation, and blocking
Mutating the value of a query cannot be done while there are
still other queries executing. If you are using your database
within a single thread, this is not a problem: you only have
&self
access to the database, but this method requires &mut self
.
However, if you have used snapshot
to create other threads,
then attempts to set
will block the current thread until
those snapshots are dropped (usually when those threads
complete). This also implies that if you create a snapshot but
do not send it to another thread, then invoking set
will
deadlock.
Before blocking, the thread that is attempting to set
will
also set a cancellation flag. This will cause any query
invocations in other threads to unwind with a Cancelled
sentinel value and eventually let the set
succeed once all
threads have unwound past the salsa invocation.
If your query implementations are performing expensive
operations without invoking another query, you can also use
the Runtime::unwind_if_cancelled
method to check for an
ongoing cancellation and bring those operations to a close,
thus allowing the set
to succeed. Otherwise, long-running
computations may lead to “starvation”, meaning that the
thread attempting to set
has to wait a long, long time. =)
Trait Implementations§
Source§impl Debug for InternStrategyQuery
impl Debug for InternStrategyQuery
Source§impl Default for InternStrategyQuery
impl Default for InternStrategyQuery
Source§fn default() -> InternStrategyQuery
fn default() -> InternStrategyQuery
Source§impl Query for InternStrategyQuery
impl Query for InternStrategyQuery
Source§const QUERY_INDEX: u16 = 8u16
const QUERY_INDEX: u16 = 8u16
Source§const QUERY_NAME: &'static str = "intern_strategy"
const QUERY_NAME: &'static str = "intern_strategy"
foo
)Source§type Key = OptimizationStrategy
type Key = OptimizationStrategy
Source§type Value = OptimizationStrategyId
type Value = OptimizationStrategyId
Source§type Storage = InternedStorage<InternStrategyQuery>
type Storage = InternedStorage<InternStrategyQuery>
Source§fn query_storage<'a>(
group_storage: &'a <Self as QueryDb<'_>>::GroupStorage,
) -> &'a Arc<Self::Storage>
fn query_storage<'a>( group_storage: &'a <Self as QueryDb<'_>>::GroupStorage, ) -> &'a Arc<Self::Storage>
Source§fn query_storage_mut<'a>(
group_storage: &'a <Self as QueryDb<'_>>::GroupStorage,
) -> &'a Arc<Self::Storage>
fn query_storage_mut<'a>( group_storage: &'a <Self as QueryDb<'_>>::GroupStorage, ) -> &'a Arc<Self::Storage>
Source§impl<'d> QueryDb<'d> for InternStrategyQuery
impl<'d> QueryDb<'d> for InternStrategyQuery
Source§type DynDb = dyn LoweringGroup + 'd
type DynDb = dyn LoweringGroup + 'd
Source§type Group = LoweringDatabase
type Group = LoweringDatabase
Source§type GroupStorage = LoweringGroupGroupStorage__
type GroupStorage = LoweringGroupGroupStorage__
Auto Trait Implementations§
impl Freeze for InternStrategyQuery
impl RefUnwindSafe for InternStrategyQuery
impl Send for InternStrategyQuery
impl Sync for InternStrategyQuery
impl Unpin for InternStrategyQuery
impl UnwindSafe for InternStrategyQuery
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more