Struct jemallocator::Jemalloc

pub struct Jemalloc;

Handle to the jemalloc allocator

This type implements the GlobalAllocAlloc trait, allowing usage a global allocator.

When the alloc_trait feature of this crate is enabled, it also implements the Alloc trait, allowing usage in collections.

Trait Implementations

impl Debug for Jemalloc

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Copy for Jemalloc

impl Clone for Jemalloc

fn clone(&self) -> Jemalloc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Jemalloc

fn default() -> Jemalloc

Returns the "default value" for a type.

impl GlobalAlloc for Jemalloc

unsafe fn alloc(&self, layout: Layout) -> *mut u8

Allocate memory as described by the given layout.

unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8

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

unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout)

Deallocate the block of memory at the given ptr pointer with the given layout.

unsafe fn realloc(
    &self,
    ptr: *mut u8,
    layout: Layout,
    new_size: usize
) -> *mut u8

Shrink or grow a block of memory to the given new_size. The block is described by the given ptr pointer and layout.

impl Alloc for Jemalloc

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

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

Returns a pointer meeting the size and alignment guarantees of layout.

unsafe 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 contents are set to zero before being returned.

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

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

Deallocate the memory referenced by ptr.

unsafe fn realloc(
    &mut self,
    ptr: NonNull<u8>,
    layout: Layout,
    new_size: usize
) -> Result<NonNull<u8>, AllocErr>

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

Returns a pointer suitable for holding data described by a new layout with layout’s alignment 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.

unsafe fn alloc_excess(&mut self, layout: Layout) -> Result<Excess, AllocErr>

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

unsafe fn realloc_excess(
    &mut self,
    ptr: NonNull<u8>,
    layout: Layout,
    new_size: usize
) -> Result<Excess, AllocErr>

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

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

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

Returns bounds on the guaranteed usable size of a successful allocation created with the specified layout.

unsafe fn grow_in_place(
    &mut self,
    ptr: NonNull<u8>,
    layout: Layout,
    new_size: usize
) -> Result<(), CannotReallocInPlace>

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

Attempts to extend the allocation referenced by ptr to fit new_size.

unsafe fn shrink_in_place(
    &mut self,
    ptr: NonNull<u8>,
    layout: Layout,
    new_size: usize
) -> Result<(), CannotReallocInPlace>

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

Attempts to shrink the allocation referenced by ptr to fit new_size.

fn alloc_one<T>(&mut self) -> Result<NonNull<T>, AllocErr>

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

Allocates a block suitable for holding an instance of T.

unsafe fn dealloc_one<T>(&mut self, ptr: NonNull<T>)

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

Deallocates a block suitable for holding an instance of T.

fn alloc_array<T>(&mut self, n: usize) -> Result<NonNull<T>, AllocErr>

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

Allocates a block suitable for holding n instances of T.

unsafe fn realloc_array<T>(
    &mut self,
    ptr: NonNull<T>,
    n_old: usize,
    n_new: usize
) -> Result<NonNull<T>, AllocErr>

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

unsafe fn dealloc_array<T>(
    &mut self,
    ptr: NonNull<T>,
    n: usize
) -> Result<(), AllocErr>

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

Deallocates a block suitable for holding n instances of T.