Enum MemoryHeadroom 

pub enum MemoryHeadroom {
    Ample,
    Tight,
}

How much memory the host reports it has left.

Variants

Ample

Enough for what caches and lazy layouts keep ready. A host that reports nothing has it.

Tight

Little: a lazy layout keeps only the items it shows, and its reuse pool one more; caches shrink to their least.

Implementations

impl MemoryHeadroom

pub fn of_heap(self, free: usize, total: usize) -> MemoryHeadroom

The headroom of a heap with free of its total bytes left, coming from self: tight below a quarter free, and ample again only above three eighths, so the items a tight list lets go do not make it ample the next frame.

Trait Implementations

impl Clone for MemoryHeadroom

fn clone(&self) -> MemoryHeadroom

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MemoryHeadroom

impl Debug for MemoryHeadroom

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

Formats the value using the given formatter.

impl Default for MemoryHeadroom

fn default() -> MemoryHeadroom

Returns the “default value” for a type.

impl Eq for MemoryHeadroom

impl PartialEq for MemoryHeadroom

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MemoryHeadroom