Struct MetricAlloc

pub struct MetricAlloc<A: GlobalAlloc> { /* private fields */ }

A global allocator type that tracks allocation metrics.

This type makes use of shared memory in order to aggregate metrics while still supporting arbitrary global allocator composition. Because of this, there should only ever be at most one instance of it (hence being a global allocator).

Implementations

impl<A: GlobalAlloc> MetricAlloc<A>

pub const fn new(wrapped: A) -> Self

Wraps an existing global allocator into a metric allocator.

Trait Implementations

impl<A: GlobalAlloc> GlobalAlloc for MetricAlloc<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.