Trait alloc_wg::alloc::AllocRef

pub trait AllocRef: DeallocRef {
    type Error;
    fn alloc(
        &mut self, 
        layout: NonZeroLayout
    ) -> Result<NonNull<u8>, Self::Error>;

    fn alloc_zeroed(
        &mut self, 
        layout: NonZeroLayout
    ) -> Result<NonNull<u8>, Self::Error> { ... }
    fn usable_size(&self, layout: NonZeroLayout) -> (usize, usize) { ... }
    unsafe fn grow_in_place(
        &mut self, 
        ptr: NonNull<u8>, 
        layout: NonZeroLayout, 
        new_size: NonZeroUsize
    ) -> bool { ... }
    unsafe fn shrink_in_place(
        &mut self, 
        ptr: NonNull<u8>, 
        layout: NonZeroLayout, 
        new_size: NonZeroUsize
    ) -> bool { ... }
}

Associated Types

type Error

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Required methods

fn alloc(&mut self, layout: NonZeroLayout) -> Result<NonNull<u8>, Self::Error>

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Provided methods

fn alloc_zeroed(
    &mut self,
    layout: NonZeroLayout
) -> Result<NonNull<u8>, Self::Error>

fn usable_size(&self, layout: NonZeroLayout) -> (usize, usize)

unsafe fn grow_in_place(
    &mut self,
    ptr: NonNull<u8>,
    layout: NonZeroLayout,
    new_size: NonZeroUsize
) -> bool

Safety

• ptr must be currently allocated via this allocator
• layout must fit the ptr (see above); note the new_size argument need not fit it
• new_size must not be less than layout.size()

unsafe fn shrink_in_place(
    &mut self,
    ptr: NonNull<u8>,
    layout: NonZeroLayout,
    new_size: NonZeroUsize
) -> bool

Safety

• ptr must be currently allocated via this allocator
• layout must fit the ptr (see above); note the new_size argument need not fit it
• new_size must not be greater than layout.size() (and must be greater than zero)

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Implementations on Foreign Types

impl AllocRef for System

type Error = AllocErr

fn alloc(&mut self, layout: NonZeroLayout) -> Result<NonNull<u8>, Self::Error>

fn alloc_zeroed(
    &mut self,
    layout: NonZeroLayout
) -> Result<NonNull<u8>, Self::Error>

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Implementors

impl AllocRef for Global

type Error = AllocErr

fn alloc(&mut self, layout: NonZeroLayout) -> Result<NonNull<u8>, Self::Error>

fn alloc_zeroed(
    &mut self,
    layout: NonZeroLayout
) -> Result<NonNull<u8>, Self::Error>

impl<A: AllocRef> AllocRef for AbortAlloc<A>

type Error = Never

fn alloc(&mut self, layout: NonZeroLayout) -> Result<NonNull<u8>, Self::Error>

fn alloc_zeroed(
    &mut self,
    layout: NonZeroLayout
) -> Result<NonNull<u8>, Self::Error>

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