Struct MmapAlloc 

pub struct MmapAlloc;

Available on crate feature mmap only.

A simple mmap-based allocator that can be used to power Mimalloc.

It is only used to allocate large chunks of memory and is not suitable for general malloc.

Trait Implementations

impl Default for MmapAlloc

fn default() -> MmapAlloc

Returns the “default value” for a type.

impl GlobalAlloc for MmapAlloc

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

See GlobalAlloc::alloc.

Safety

It can only allocate memory layouts whose size and alignment are multiples of the OS page size.

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

Deallocates the block of memory at the given ptr pointer with 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 realloc( &self, ptr: *mut u8, layout: Layout, new_size: usize, ) -> *mut u8

Shrinks or grows a block of memory to the given new_size in bytes. The block is described by the given ptr pointer and layout.