[−][src]Struct nom::lib::std::alloc::Global
allocator_api
)The global memory allocator.
This type implements the [Alloc
] 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 Default for Global
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impl Debug for Global
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impl Alloc for Global
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unsafe fn alloc(&mut self, layout: Layout) -> Result<NonNull<u8>, AllocErr>
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unsafe fn dealloc(&mut self, ptr: NonNull<u8>, layout: Layout)
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unsafe fn realloc(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<NonNull<u8>, AllocErr>
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&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<NonNull<u8>, AllocErr>
unsafe fn alloc_zeroed(
&mut self,
layout: Layout
) -> Result<NonNull<u8>, AllocErr>
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&mut self,
layout: Layout
) -> Result<NonNull<u8>, AllocErr>
fn usable_size(&self, layout: &Layout) -> (usize, usize)
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allocator_api
)Returns bounds on the guaranteed usable size of a successful allocation created with the specified layout
. Read more
unsafe fn alloc_excess(&mut self, layout: Layout) -> Result<Excess, AllocErr>
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allocator_api
)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 more
unsafe fn realloc_excess(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<Excess, AllocErr>
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&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<Excess, AllocErr>
allocator_api
)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 more
unsafe fn grow_in_place(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
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&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
allocator_api
)Attempts to extend the allocation referenced by ptr
to fit new_size
. Read more
unsafe fn shrink_in_place(
&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
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&mut self,
ptr: NonNull<u8>,
layout: Layout,
new_size: usize
) -> Result<(), CannotReallocInPlace>
allocator_api
)Attempts to shrink the allocation referenced by ptr
to fit new_size
. Read more
fn alloc_one<T>(&mut self) -> Result<NonNull<T>, AllocErr>
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allocator_api
)Allocates a block suitable for holding an instance of T
. Read more
unsafe fn dealloc_one<T>(&mut self, ptr: NonNull<T>)
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allocator_api
)Deallocates a block suitable for holding an instance of T
. Read more
fn alloc_array<T>(&mut self, n: usize) -> Result<NonNull<T>, AllocErr>
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allocator_api
)Allocates a block suitable for holding n
instances of T
. Read more
unsafe fn realloc_array<T>(
&mut self,
ptr: NonNull<T>,
n_old: usize,
n_new: usize
) -> Result<NonNull<T>, AllocErr>
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&mut self,
ptr: NonNull<T>,
n_old: usize,
n_new: usize
) -> Result<NonNull<T>, AllocErr>
allocator_api
)Reallocates a block previously suitable for holding n_old
instances of T
, returning a block suitable for holding n_new
instances of T
. Read more
unsafe fn dealloc_array<T>(
&mut self,
ptr: NonNull<T>,
n: usize
) -> Result<(), AllocErr>
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&mut self,
ptr: NonNull<T>,
n: usize
) -> Result<(), AllocErr>
allocator_api
)Deallocates a block suitable for holding n
instances of T
. Read more
impl Clone for Global
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fn clone(&self) -> Global
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Copy for Global
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Auto Trait Implementations
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ifn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,