Defines no_std and bare metal usable traits that can be implemented to
defined different kinds of allocators, similar to alloc::GlobalAlloc. But
unlike the standard library trait they do not presume global uniqueness and
static lifetime of the memory resource provider. In return, the allocators are
not required to implement the Sync bound and can easily be built without
operating system support to be usable.
There are additional independent crates with additional abstractions on-top:
static-alloc: A simple allocator drawing from a memory region statically embedded within the compiled binary.without-alloc: A set of data structures (Box,Vec,Rc, ...) that can be allocated from the implementors of the traits defined here.