Struct FailOnSize 

pub struct FailOnSize {
    pub min_fail_bytes: usize,
}

Policy that fails any allocation whose requested size is at least min_fail_bytes, and permits smaller ones.

Models an allocator that can satisfy small requests but not large ones — exercising the size-dependent OOM branch (a slab that rejects over-stride requests, a fixed arena that has room for scratch but not a bulk buffer). Stateless and Copy.

Fields

min_fail_bytes: usize

Smallest request size, in bytes, that is forced to fail (inclusive).

Implementations

impl FailOnSize

pub const fn new(min_fail_bytes: usize) -> FailOnSize

Construct a policy that fails allocations of min_fail_bytes bytes or larger.

Trait Implementations

impl AllocFaultPolicy for FailOnSize

fn should_fail(&self, layout: NonZeroLayout) -> bool

Return true to force the pending allocation of layout to fail with AllocError; return false to let it proceed to the inner allocator.

impl Clone for FailOnSize

fn clone(&self) -> FailOnSize

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FailOnSize

impl Debug for FailOnSize

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

Formats the value using the given formatter.