Struct heap::Heap

pub struct Heap { /* private fields */ }

The heap which is used as a global allocator for the system. It starts off with one basic fixed size allocator, the initial allocator. When a more complex heap is created and set as the DEFAULT_ALLOCATOR, then it is used.

Implementations

impl Heap

pub const fn empty() -> Heap

Returns a heap in which only an empty initial allocator has been created.

Trait Implementations

impl GlobalAlloc for Heap

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

Allocate memory as described by the given layout.

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 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

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