pub struct Global;
Expand description
The global memory allocator.
This type implements the Allocator
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
sourceimpl Allocator for Global
impl Allocator for Global
sourcefn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>
fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>
Attempts to allocate a block of memory. Read more
sourcefn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>
fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>
Behaves like allocate
, but also ensures that the returned memory is zero-initialized. Read more
sourceunsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout)
unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout)
Deallocates the memory referenced by ptr
. Read more
sourceunsafe fn grow(
&self,
ptr: NonNull<u8>,
old_layout: Layout,
new_layout: Layout
) -> Result<NonNull<[u8]>, AllocError>
unsafe fn grow(
&self,
ptr: NonNull<u8>,
old_layout: Layout,
new_layout: Layout
) -> Result<NonNull<[u8]>, AllocError>
Attempts to extend the memory block. Read more
sourceunsafe fn grow_zeroed(
&self,
ptr: NonNull<u8>,
old_layout: Layout,
new_layout: Layout
) -> Result<NonNull<[u8]>, AllocError>
unsafe fn grow_zeroed(
&self,
ptr: NonNull<u8>,
old_layout: Layout,
new_layout: Layout
) -> Result<NonNull<[u8]>, AllocError>
Behaves like grow
, but also ensures that the new contents are set to zero before being
returned. Read more
impl Copy for Global
Auto Trait Implementations
impl RefUnwindSafe for Global
impl Send for Global
impl Sync for Global
impl Unpin for Global
impl UnwindSafe for Global
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
Uses borrowed data to replace owned data, usually by cloning. Read more