Trait composable_allocators::Fallbackable

pub unsafe trait Fallbackable: Allocator {
    unsafe fn has_allocated(&self, ptr: NonNull<u8>, layout: Layout) -> bool;
    fn allows_fallback(&self, layout: Layout) -> bool;
}

Safety

The allows_fallback function should be pure, i.e. always return same value for same layout.

An implementer of this trait should return true from has_allocated if and only if at least one of the following conditions is satisfied:

• the passed pointer is denoting to currently allocated block,

• allows_fallback returns false for Layout used to allocate memory block, denoting by ptr.

Required Methods

unsafe fn has_allocated(&self, ptr: NonNull<u8>, layout: Layout) -> bool

Safety

The ptr parameter should denote a memory block, currently allocated by this or any other Allocator.

The layout parameter should fit the memory block denoting by ptr.

fn allows_fallback(&self, layout: Layout) -> bool

Implementations on Foreign Types

impl<'a, T: Fallbackable> Fallbackable for &'a T

unsafe fn has_allocated(&self, ptr: NonNull<u8>, layout: Layout) -> bool

fn allows_fallback(&self, layout: Layout) -> bool

Implementors

impl Fallbackable for Impossible

impl Fallbackable for NonWorking

impl<A: Fallbackable, Fallback: Fallbackable> Fallbackable for Fallbacked<A, Fallback>

impl<P: Params, A: Fallbackable> Fallbackable for Freelist<P, A>

impl<P: Params, A: Allocator> Fallbackable for LimitedUpTo<P, A>

impl<P: Params> Fallbackable for Stacked<P>