Struct webrender::util::PrimaryArc

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pub struct PrimaryArc<T>(pub Arc<T>);
Expand description

Arc wrapper to support measurement via MallocSizeOf.

Memory reporting for Arcs is tricky because of the risk of double-counting. One way to measure them is to keep a table of pointers that have already been traversed. The other way is to use knowledge of the program structure to identify which Arc instances should be measured and which should be skipped to avoid double-counting.

This struct implements the second approach. It identifies the “main” pointer to the Arc-ed resource, and measures the buffer as if it were an owned pointer. The programmer should ensure that there is at most one PrimaryArc for a given underlying ArcInner.

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§0: Arc<T>

Trait Implementations§

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impl<T: Clone> Clone for PrimaryArc<T>

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fn clone(&self) -> PrimaryArc<T>

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<T: Debug> Debug for PrimaryArc<T>

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

Formats the value using the given formatter. Read more
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impl<T: Hash> Hash for PrimaryArc<T>

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<T> MallocShallowSizeOf for PrimaryArc<T>

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fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of immediate heap-allocated descendant structures, but not the space taken up by the value itself. Anything beyond the immediate descendants must be measured separately, using iteration.
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impl<T: MallocSizeOf> MallocSizeOf for PrimaryArc<T>

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fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.
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impl<T: PartialEq> PartialEq for PrimaryArc<T>

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fn eq(&self, other: &PrimaryArc<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T> Serialize for PrimaryArc<T>
where T: Serialize,

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl<T> Deref for PrimaryArc<T>

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type Target = Arc<T>

The resulting type after dereferencing.
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fn deref(&self) -> &Arc<T>

Dereferences the value.
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impl<T: Eq> Eq for PrimaryArc<T>

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impl<T> StructuralPartialEq for PrimaryArc<T>

Auto Trait Implementations§

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impl<T> Freeze for PrimaryArc<T>

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impl<T> RefUnwindSafe for PrimaryArc<T>
where T: RefUnwindSafe,

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impl<T> Send for PrimaryArc<T>
where T: Sync + Send,

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impl<T> Sync for PrimaryArc<T>
where T: Sync + Send,

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impl<T> Unpin for PrimaryArc<T>

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impl<T> UnwindSafe for PrimaryArc<T>
where T: RefUnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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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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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts 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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts 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
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impl<T> Pointable for T

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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

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

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

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.