Struct UnifiedValue 

#[repr(C)]
pub struct UnifiedValue<T> {
    pub kind: u16,
    pub flags: u8,
    pub _reserved: u8,
    pub refcount: AtomicU32,
    pub data: T,
}

Generic unified heap value with the standard header format.

Layout: [kind: u16][flags: u8][_reserved: u8][refcount: AtomicU32][data: T] Data starts at offset 8, same as JitAlloc.

The kind: u16 at offset 0 is layout-compatible with JitAlloc<T> so read_heap_kind works on both shapes uniformly.

Fields

kind: u16

flags: u8

_reserved: u8

refcount: AtomicU32

data: T

Implementations

impl<T> UnifiedValue<T>

pub fn new(kind: u16, data: T) -> Self

pub fn heap_box(self) -> u64

Allocate this value on the heap and return the raw Box::into_raw pointer cast to u64. Per §2.7.5 the JIT-FFI boundary carries this u64 directly alongside a parallel NativeKind companion supplied from the call signature.

pub unsafe fn from_heap_bits(bits: u64) -> &'static Self

Safety

bits must be a Box::into_raw-returned pointer to a live UnifiedValue<T> allocation (or one produced by heap_box on the same T). Callers also vouch that the parallel NativeKind they have for this slot is consistent with T per the §2.7.5 stamp.

pub unsafe fn from_heap_bits_mut(bits: u64) -> &'static mut Self

Safety

Same as from_heap_bits, plus exclusive access must be guaranteed.

pub unsafe fn heap_drop(bits: u64)

Safety

Must only be called once per allocation. bits must be a Box::into_raw-returned pointer to a live UnifiedValue<T>.