Struct Cap 

pub struct Cap {
    pub cgroup: Option<u64>,
    pub host: Option<u64>,
}

What this process is allowed to use.

Fields

cgroup: Option<u64>

The cgroup limit in bytes, or None where there is no cgroup or no limit set on it.

host: Option<u64>

What the machine has in bytes, or None where it could not be asked.

Implementations

impl Cap

pub fn read() -> Cap

Ask the running system.

pub fn limit(&self) -> Option<u64>

The smaller of the two, which is what this process actually gets.

A cgroup limit larger than the machine is not a limit, so the host number wins there, and a machine with no cgroup limit is capped only by itself.

pub fn budget(&self) -> u64

A quarter of the limit, which is what a pool should be sized from.

Zero when there is no limit to take a quarter of, which is the same thing maxmemory means by zero and is why it is zero and not None.

Trait Implementations

impl Clone for Cap

fn clone(&self) -> Cap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Cap

impl Debug for Cap

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

Formats the value using the given formatter.

impl Default for Cap

fn default() -> Cap

Returns the “default value” for a type.

impl Eq for Cap

impl PartialEq for Cap

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Cap