# 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.
CannotReallocInPlace | Experimental The `CannotReallocInPlace` error is used when `grow_in_place` or `shrink_in_place` were unable to reuse the given memory block for a requested layout.
Excess | Experimental Represents the combination of a starting address and a total capacity of the returned block.
Global | Experimental The global memory allocator.

## 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, reallocate, 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.