Struct alloc_wg::alloc::Global

pub struct Global;

🔬 This is a nightly-only experimental API. (allocator_api)

The global memory allocator.

This type implements the AllocRef trait by forwarding calls to the allocator registered with the #[global_allocator] attribute if there is one, or the std crate’s default.

Note: while this type is unstable, the functionality it provides can be accessed through the free functions in alloc.

Trait Implementations

impl AllocRef for Global

fn alloc(&mut self, layout: Layout) -> Result<NonNull<[u8]>, AllocErr>

🔬 This is a nightly-only experimental API. (allocator_api)

Attempts to allocate a block of memory.

fn alloc_zeroed(&mut self, layout: Layout) -> Result<NonNull<[u8]>, AllocErr>

🔬 This is a nightly-only experimental API. (allocator_api)

Behaves like alloc, but also ensures that the returned memory is zero-initialized.

unsafe fn dealloc(&mut self, ptr: NonNull<u8>, layout: Layout)

🔬 This is a nightly-only experimental API. (allocator_api)

Deallocates the memory referenced by ptr.

unsafe fn grow(
    &mut self,
    ptr: NonNull<u8>,
    old_layout: Layout,
    new_layout: Layout
) -> Result<NonNull<[u8]>, AllocErr>

🔬 This is a nightly-only experimental API. (allocator_api)

Attempts to extend the memory block.

unsafe fn grow_zeroed(
    &mut self,
    ptr: NonNull<u8>,
    old_layout: Layout,
    new_layout: Layout
) -> Result<NonNull<[u8]>, AllocErr>

🔬 This is a nightly-only experimental API. (allocator_api)

Behaves like grow, but also ensures that the new contents are set to zero before being returned.

unsafe fn shrink(
    &mut self,
    ptr: NonNull<u8>,
    old_layout: Layout,
    new_layout: Layout
) -> Result<NonNull<[u8]>, AllocErr>

🔬 This is a nightly-only experimental API. (allocator_api)

Attempts to shrink the memory block.

fn by_ref(&mut self) -> &mut Self

🔬 This is a nightly-only experimental API. (allocator_api)

Creates a "by reference" adaptor for this instance of AllocRef.

impl Clone for Global

fn clone(&self) -> Global

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Global

impl Debug for Global

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

Formats the value using the given formatter.

impl Default for Global

fn default() -> Global

Returns the "default value" for a type.