Trait parity_util_mem::MallocSizeOf[−][src]

pub trait MallocSizeOf {
    fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize;

    fn constant_size() -> Option<usize>
    where
        Self: Sized,
    { ... }
}

Trait for measuring the “deep” heap usage of a data structure. This is the most commonly-used of the traits.

Required methods

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself. If T::size_of is a constant, consider implementing constant_size as well.

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Provided methods

`fn constant_size() -> Option<usize> where Self: Sized,` [src]

Used to optimize MallocSizeOf implementation for collections like Vec and HashMap to avoid iterating over them unnecessarily. The Self: Sized bound is for object safety.

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Implementations on Foreign Types

`impl<T: MallocSizeOf> MallocSizeOf for Arc<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl MallocSizeOf for String`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<'a, T: ?Sized> MallocSizeOf for &'a T`[src]

`fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<T: MallocSizeOf + ?Sized> MallocSizeOf for Box<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl MallocSizeOf for ()`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf> MallocSizeOf for (TupleElement0,)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf, TupleElement9: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9)`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf, TupleElement9: MallocSizeOf, TupleElement10: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10)[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf, TupleElement9: MallocSizeOf, TupleElement10: MallocSizeOf, TupleElement11: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10, TupleElement11)[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<T: MallocSizeOf> MallocSizeOf for Option<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<T: MallocSizeOf, E: MallocSizeOf> MallocSizeOf for Result<T, E>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<T: MallocSizeOf + Copy> MallocSizeOf for Cell<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<T: MallocSizeOf> MallocSizeOf for RefCell<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<'a, B: ?Sized + ToOwned> MallocSizeOf for Cow<'a, B> where B::Owned: MallocSizeOf,` [src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<T: MallocSizeOf> MallocSizeOf for [T]`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<T: MallocSizeOf> MallocSizeOf for Vec<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<T: MallocSizeOf> MallocSizeOf for VecDeque<T>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<T, S> MallocSizeOf for HashSet<T, S> where T: Eq + Hash + MallocSizeOf, S: BuildHasher,` [src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<I: MallocSizeOf> MallocSizeOf for Reverse<I>`[src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`fn constant_size() -> Option<usize>`[src]

`impl<K, V, S> MallocSizeOf for HashMap<K, V, S> where K: MallocSizeOf, V: MallocSizeOf,` [src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<K, V> MallocSizeOf for BTreeMap<K, V> where K: MallocSizeOf, V: MallocSizeOf,` [src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<T> MallocSizeOf for BTreeSet<T> where T: MallocSizeOf,` [src]

`fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize`[src]

`impl<T: MallocSizeOf> MallocSizeOf for Mutex<T>`[src]

If a mutex is stored directly as a member of a data type that is being measured, it is the unique owner of its contents and deserves to be measured.

If a mutex is stored inside of an Arc value as a member of a data type that is being measured, the Arc will not be automatically measured so there is no risk of overcounting the mutex’s contents.

The same reasoning applies to RwLock.