Function realloc_main_thread 

unsafe fn realloc_main_thread(
    old_ptr: Sendable<*mut u8>,
    old_size: usize,
    align: usize,
    new_size: usize,
) -> Sendable<*mut u8>

Reallocate memory on the R main thread.

Safety

Must be called from R’s main thread (or routed via with_r_thread). The old pointer must have been allocated by this allocator.