Struct rustc_arena::DroplessArena

pub struct DroplessArena {
    start: Cell<*mut u8>,
    end: Cell<*mut u8>,
    chunks: RefCell<Vec<TypedArenaChunk<u8>>>,
}

Fields

start: Cell<*mut u8>

A pointer to the start of the free space.

end: Cell<*mut u8>

A pointer to the end of free space.

The allocation proceeds from the end of the chunk towards the start. When this pointer crosses the start pointer, a new chunk is allocated.

chunks: RefCell<Vec<TypedArenaChunk<u8>>>

A vector of arena chunks.

Implementations

impl DroplessArena

pub(crate) fn grow(&self, additional: usize)

pub(crate) fn alloc_raw_without_grow(&self, layout: Layout) -> Option<*mut u8>

Allocates a byte slice with specified layout from the current memory chunk. Returns None if there is no free space left to satisfy the request.

pub fn alloc_raw(&self, layout: Layout) -> *mut u8

pub fn alloc<T>(&self, object: T) -> &mut T

pub fn alloc_slice<T>(&self, slice: &[T]) -> &mut [T] where
    T: Copy, 

Allocates a slice of objects that are copied into the DroplessArena, returning a mutable reference to it. Will panic if passed a zero-sized type.

Panics:

• Zero-sized types
• Zero-length slices

pub(crate) unsafe fn write_from_iter<T, I: Iterator<Item = T>>(
    &self,
    iter: I,
    len: usize,
    mem: *mut T
) -> &mut [T]

pub fn alloc_from_iter<T, I: IntoIterator<Item = T>>(&self, iter: I) -> &mut [T]

Trait Implementations

impl Default for DroplessArena

fn default() -> DroplessArena

Returns the “default value” for a type.

impl Send for DroplessArena