Struct swim_mem::alloc::HoldScope

pub struct HoldScope<'a> { /* fields omitted */ }

Linked list of Hold references representing a stack of memory allocation contexts.

Methods

impl<'a> HoldScope<'a>

pub fn new(hold: &'a dyn Hold<'a>) -> HoldScope<'a>

Trait Implementations

impl<'a> Hold<'a> for HoldScope<'a>

unsafe fn alloc(&self, layout: Layout) -> Result<Block<'a>, HoldError>

Returns an unmanaged pointer to an uninitialized memory block sized and aligned to layout; returns an Err if the allocation fails. The allocated block will have a valid AllocTag in the bytes immediately preceding the block.

unsafe fn dealloc(&self, _block: Block<'a>) -> usize

Releases a memory block allocated by this Hold. Returns the number of freed bytes.

unsafe fn resize(
    &self,
    _block: Block<'a>,
    _layout: Layout
) -> Result<Block<'a>, HoldError>

Attempts to resize in place a memory block allocated by this Hold to fit a new layout. Returns Ok with the resized memory block on success; returns a HoldError on failure.

unsafe fn realloc(
    &self,
    block: Block<'a>,
    layout: Layout
) -> Result<Block<'a>, HoldError>

Attempts to resize a memory block allocated by this Hold to fit a new layout. Returns Ok with the resized memory block on success; returns a HoldError on failure.