Struct allocator_api::alloc::Global
source · pub struct Global;Trait Implementations§
source§impl Alloc for Global
impl Alloc for Global
source§unsafe fn alloc(&mut self, layout: Layout) -> Result<NonNull<u8>, AllocErr>
unsafe fn alloc(&mut self, layout: Layout) -> Result<NonNull<u8>, AllocErr>
Returns a pointer meeting the size and alignment guarantees of
layout. Read moresource§unsafe fn dealloc(&mut self, ptr: NonNull<u8>, layout: Layout)
unsafe fn dealloc(&mut self, ptr: NonNull<u8>, layout: Layout)
Deallocate the memory referenced by
ptr. Read moresource§unsafe fn realloc(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<NonNull<u8>, AllocErr>
unsafe fn realloc(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<NonNull<u8>, AllocErr>
Returns a pointer suitable for holding data described by
a new layout with
layout’s alginment and a size given
by new_size. To
accomplish this, this may extend or shrink the allocation
referenced by ptr to fit the new layout. Read moresource§unsafe fn alloc_zeroed(
&mut self,
layout: Layout
) -> Result<NonNull<u8>, AllocErr>
unsafe fn alloc_zeroed(
&mut self,
layout: Layout
) -> Result<NonNull<u8>, AllocErr>
Behaves like
alloc, but also ensures that the contents
are set to zero before being returned. Read moresource§fn usable_size(&self, layout: &Layout) -> (usize, usize)
fn usable_size(&self, layout: &Layout) -> (usize, usize)
Returns bounds on the guaranteed usable size of a successful
allocation created with the specified
layout. Read moresource§unsafe fn alloc_excess(&mut self, layout: Layout) -> Result<Excess, AllocErr>
unsafe fn alloc_excess(&mut self, layout: Layout) -> Result<Excess, AllocErr>
Behaves like
alloc, but also returns the whole size of
the returned block. For some layout inputs, like arrays, this
may include extra storage usable for additional data. Read moresource§unsafe fn realloc_excess(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<Excess, AllocErr>
unsafe fn realloc_excess(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<Excess, AllocErr>
Behaves like
realloc, but also returns the whole size of
the returned block. For some layout inputs, like arrays, this
may include extra storage usable for additional data. Read moresource§unsafe fn grow_in_place(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
unsafe fn grow_in_place(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
source§unsafe fn shrink_in_place(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
unsafe fn shrink_in_place(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
source§fn alloc_one<T>(&mut self) -> Result<NonNull<T>, AllocErr>where
Self: Sized,
fn alloc_one<T>(&mut self) -> Result<NonNull<T>, AllocErr>where
Self: Sized,
Allocates a block suitable for holding an instance of
T. Read moresource§unsafe fn dealloc_one<T>(&mut self, ptr: NonNull<T>)where
Self: Sized,
unsafe fn dealloc_one<T>(&mut self, ptr: NonNull<T>)where
Self: Sized,
Deallocates a block suitable for holding an instance of
T. Read more