# 1.28.0[−][src]Module alloc::alloc

Memory allocation APIs

## Structs

Layout | Layout of a block of memory.
LayoutErr | The parameters given to `Layout::from_size_align` or some other `Layout` constructor do not satisfy its documented constraints.
AllocErr | Experimental The `AllocErr` error indicates an allocation failure that may be due to resource exhaustion or to something wrong when combining the given input arguments with this allocator.
Global | Experimental The global memory allocator.
MemoryBlock | Experimental Represents a block of allocated memory returned by an allocator.

## Enums

AllocInit | Experimental A desired initial state for allocated memory.
ReallocPlacement | Experimental A placement constraint when growing or shrinking an existing allocation.

## Traits

GlobalAlloc | A memory allocator that can be registered as the standard library’s default through the `#[global_allocator]` attribute.
AllocRef | Experimental An implementation of `AllocRef` can allocate, grow, shrink, and deallocate arbitrary blocks of data described via `Layout`.

## Functions

alloc⚠ | Allocate memory with the global allocator.
alloc_zeroed⚠ | Allocate zero-initialized memory with the global allocator.
dealloc⚠ | Deallocate memory with the global allocator.
handle_alloc_error | Abort on memory allocation error or failure.
realloc⚠ | Reallocate memory with the global allocator.