Struct mmtk::util::alloc::BumpPointer

#[repr(C)]
pub struct BumpPointer {
    pub cursor: Address,
    pub limit: Address,
}

A common fast-path bump-pointer allocator shared across different allocator implementations that use bump-pointer allocation. A BumpPointer is always initialized with cursor = 0, limit = 0, so the first allocation always fails the check of cursor + size < limit and goes to the slowpath. A binding can also take advantage of this design to zero-initialize the a bump pointer.

Fields

cursor: Address

The cursor inside the allocation buffer where the next object will be allocated.

limit: Address

The upperbound of the allocation buffer.

Implementations

impl BumpPointer

pub fn reset(&mut self, start: Address, end: Address)

Reset the cursor and limit to the given values.

Trait Implementations

impl Clone for BumpPointer

fn clone(&self) -> BumpPointer

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for BumpPointer

fn default() -> Self

Defaults to 0,0. In this case, the first allocation would naturally fail the check cursor + size < limit, and go to the slowpath.

impl Copy for BumpPointer