Struct Layout 

pub struct Layout { /* private fields */ }

Layout of a block of memory.

An instance of Layout describes a particular layout of memory. You build a Layout up as an input to give to an allocator.

All layouts have an associated size and a power-of-two alignment. The size, when rounded up to the nearest multiple of align, does not overflow isize (i.e., the rounded value will always be less than or equal to isize::MAX).

(Note that layouts are not required to have non-zero size, even though GlobalAlloc requires that all memory requests be non-zero in size. A caller must either ensure that conditions like this are met, use specific allocators with looser requirements, or use the more lenient Allocator interface.)

Implementations

impl Layout

pub const unsafe fn from_size_align_unchecked(size: usize, align: usize) -> Self

Creates a layout, bypassing all checks.

Safety

This function is unsafe as it does not verify the preconditions from [Layout::from_size_align].

pub const fn size(&self) -> usize

The minimum size in bytes for a memory block of this layout.

pub const fn align(&self) -> usize

The minimum byte alignment for a memory block of this layout.

The returned alignment is guaranteed to be a power of two.

pub const fn new<T>() -> Self

Constructs a Layout suitable for holding a value of type T.