Struct RAllocator 

pub struct RAllocator;

R-backed global allocator.

All allocations are backed by R RAWSXP objects and protected from garbage collection. The allocator stores metadata before the returned pointer to enable proper deallocation.

Note: This should NOT be used as #[global_allocator] in R package library crates, as it would be invoked during compilation/build time when R isn’t available. Instead, use it explicitly in standalone binaries that embed R, or use arena-style allocation APIs.

Thread Safety

This allocator is safe to use from any thread. R API calls are automatically routed to the main thread via with_r_thread_or_inline.

Trait Implementations

impl Debug for RAllocator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl GlobalAlloc for RAllocator

unsafe fn alloc(&self, layout: Layout) -> *mut u8

Allocates memory as described by the given layout.

unsafe fn dealloc(&self, data: *mut u8, _layout: Layout)

Deallocates the block of memory at the given ptr pointer with the given layout.

unsafe fn realloc( &self, old: *mut u8, layout: Layout, new_size: usize, ) -> *mut u8

Shrinks or grows a block of memory to the given new_size in bytes. The block is described by the given ptr pointer and layout.

unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8

Behaves like alloc, but also ensures that the contents are set to zero before being returned.