Struct rcu_clean::ArcRcu

source ·
pub struct ArcRcu<T> { /* private fields */ }
Expand description

A thread-safe reference counted pointer that allows interior mutability

The ArcRcu is functionally roughly equivalent to Arc<RwLock<T>>, except that reads (of the old value) may happen while a write is taking place. Reads on an ArcRcu are much faster (by a factor of 2 or 3) than reads on either a Arc<RwLock<T>> or a Arc<Mutex<T>>. So in this case you gain both ergonomics and read speed. Writes are slow, so only use this type if writes are rare (or their speed doesn’t matter).

let x = rcu_clean::ArcRcu::new(3);
let y: &usize = &(*x);
let z = x.clone();
*x.update() = 7; // Wow, we are mutating something we have borrowed!
assert_eq!(*y, 3); // the old reference is still valid.
assert_eq!(*x, 7); // but the pointer now points to the new value.
assert_eq!(*z, 7); // but the cloned pointer also points to the new value.

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Trait Implementations§

Immutably borrows from an owned value. Read more
Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
The resulting type after dereferencing.
Dereferences the value.
Formats the value using the given formatter. Read more
This method returns an Ordering between self and other. Read more
Compares and returns the maximum of two values. Read more
Compares and returns the minimum of two values. Read more
Restrict a value to a certain interval. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.