Struct Allocator 

pub struct Allocator { /* private fields */ }

Implementations

impl Allocator

pub fn create( file: &File, file_size: usize, num_workers: u32, slab_size: u32, worker_index: u32, ) -> Result<Self, Error>

Create a new Allocator in the provided file with the given parameters.

pub unsafe fn join(file: &File, worker_index: u32) -> Result<Self, Error>

Join an existing allocator in the provided file.

Safety

• worker_index must be uniquely assigned to this worker thread/process.

impl Allocator

pub fn allocate(&self, size: u32) -> Option<NonNull<u8>>

Allocates a block of memory of the given size. If the size is larger than the maximum size class, returns None. If the allocation fails, returns None.

impl Allocator

pub unsafe fn free(&self, ptr: NonNull<u8>)

Free a block of memory previously allocated by this allocator.

Safety

• The ptr must be a valid pointer to a block of memory allocated by this allocator.
• The ptr must not have been freed before.

pub unsafe fn free_offset(&self, offset: usize)

Free a block of memory previously allocated by this allocator.

Safety

• The offset must be a valid offset within the memory allocated by this allocator.
• The offset must not have been freed before.

pub unsafe fn offset(&self, ptr: NonNull<u8>) -> usize

Find the offset given a pointer.

Safety

• The ptr must be a valid pointer in the allocator’s address space.

pub unsafe fn ptr_from_offset(&self, offset: usize) -> NonNull<u8>

Return a ptr given a shareable offset - calculated by offset.

Safety

• Caller must ensure the offset is valid for this allocator.

impl Allocator

pub fn clean_remote_free_lists(&self)

Frees all items in remote free lists.

Trait Implementations

impl Drop for Allocator

fn drop(&mut self)

Executes the destructor for this type.

impl Send for Allocator