alloc
To use alloc
you must implement a global (heap) allocator.
Speaker Notes
buddy_system_allocator
is a crate implementing a basic buddy system allocator. Other crates are available, or you can write your own or hook into your existing allocator.- The const parameter of
LockedHeap
is the max order of the allocator; i.e. in this case it can allocate regions of up to 2**32 bytes. - If any crate in your dependency tree depends on
alloc
then you must have exactly one global allocator defined in your binary. Usually this is done in the top-level binary crate. extern crate panic_halt as _
is necessary to ensure that thepanic_halt
crate is linked in so we get its panic handler.- This example will build but not run, as it doesn't have an entry point.