Struct Guard 

pub struct Guard<A = System>(/* private fields */);

The global allocator that counts large allocations, refuses those that would pass the process’s limit and, on Linux, asks for huge pages for the largest. It allocates through A: System, unless Guard::over names another global allocator, as the browser build names talc. Register it as #[global_allocator] static GUARD: Guard = Guard::new();.

Implementations

impl Guard

pub const fn new() -> Self

A guard over System, for the process’s limit, which set_limit can change.

impl<A: GlobalAlloc + 'static> Guard<A>

pub const fn over(allocator: A) -> Self

A guard that allocates through allocator. Guard::new gives one over System.

Trait Implementations

impl<A: Default> Default for Guard<A>

fn default() -> Self

Returns the “default value” for a type.

impl<A: GlobalAlloc + 'static> GlobalAlloc for Guard<A>

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

Allocates 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)

Deallocates 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

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.