rustc_middle::ty::context

Struct CurrentGcx

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pub struct CurrentGcx {
    value: Lrc<RwLock<Option<*const ()>>>,
}
Expand description

This is used to get a reference to a GlobalCtxt if one is available.

This is needed to allow the deadlock handler access to GlobalCtxt to look for query cycles. It cannot use the TLV global because that’s only guaranteed to be defined on the thread creating the GlobalCtxt. Other threads have access to the TLV only inside Rayon jobs, but the deadlock handler is not called inside such a job.

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§value: Lrc<RwLock<Option<*const ()>>>

This stores a pointer to a GlobalCtxt. This is set to Some inside GlobalCtxt::enter and reset to None when that function returns or unwinds.

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impl CurrentGcx

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pub fn new() -> Self

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pub fn access<R>( &self, f: impl for<'tcx> FnOnce(&'tcx GlobalCtxt<'tcx>) -> R, ) -> R

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impl Clone for CurrentGcx

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fn clone(&self) -> CurrentGcx

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl DynSend for CurrentGcx

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impl DynSync for CurrentGcx

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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Immutably borrows from an owned value. Read more
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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn from(t: T) -> T

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fn instrument(self, span: Span) -> Instrumented<Self>

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Calls U::from(self).

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

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The resulting type after obtaining ownership.
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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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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