Struct DataStack 

pub struct DataStack { /* private fields */ }

Per-thread data stack for bump-allocating frame-local data.

Implementations

impl DataStack

pub fn new() -> Self

Create a new data stack with an initial root chunk.

pub fn has_space(&self, size: usize) -> bool

Check if the current chunk has at least size bytes available.

pub fn push(&mut self, size: usize) -> *mut u8

Allocate size bytes from the data stack.

Returns a pointer to the allocated region (aligned to ALIGN). The caller must call pop() with the returned pointer when done (LIFO order).

pub fn push_frame(&mut self, size: usize) -> (*mut u8, bool)

Allocate a full interpreter frame and report whether it exactly reuses a just-cleared frame block.

pub unsafe fn pop(&mut self, base: *mut u8)

Pop a previous allocation. base must be the pointer returned by push(). Calls must be in LIFO order.

Safety

base must be a valid pointer returned by push() on this data stack, and all allocations made after it must already have been popped.

pub unsafe fn pop_frame(&mut self, base: *mut u8, size: usize)

Pop a full frame whose localsplus slots have already been cleared.

Safety

base and size must describe the most recent allocation returned by push_frame, every later allocation must already be popped, and all localsplus slots in the frame must have been cleared.

Trait Implementations

impl Default for DataStack

fn default() -> Self

Returns the “default value” for a type.

impl Drop for DataStack

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Send for DataStack