Enum Rmw 

pub enum Rmw {
    Add,
    Sub,
    And,
    Nand,
    Or,
    Xor,
}

What a read modify write does to the value it read.

The six gcc has, which is every operation either family names. What a machine has a single instruction for is not decided here: the back end reads this and either finds an instruction or writes the loop around a compare and exchange that stands in for one.

Variants

Add

Addition, which is lock xadd on this machine.

Sub

Subtraction, which is the same instruction over the negated operand.

And

Bitwise and.

Nand

Bitwise and with every bit of the answer flipped, which is the one of the six that is two operations rather than one and the one no machine here has anything for.

Or

Bitwise or.

Xor

Bitwise exclusive or.

Trait Implementations

impl Clone for Rmw

fn clone(&self) -> Rmw

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Rmw

impl Debug for Rmw

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

Formats the value using the given formatter.

impl Eq for Rmw

impl PartialEq for Rmw

fn eq(&self, other: &Rmw) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Rmw