Function realloc

pub unsafe fn realloc(
    scrap_heap: NonNull<ScrapHeap>,
    new_layout: Layout,
) -> Result<(NonNull<ScrapHeap>, NonNull<u8>), AllocError>

Attempts to reallocate memory previously allocated from a thread-local scrap heap.

Errors

Returns a pair of non-null pointers to the scrap heap and the newly allocated memory on success, or an AllocError if reallocation fails.

The old memory region is not automatically copied or deallocated.

Safety

• old_ptr must be a pointer previously returned by alloc or alloc_zeroed using the same scrap heap and layout.
• The caller is responsible for copying any existing data and deallocating the old pointer if needed.
• The returned memory is uninitialized.

This function behaves more like a fresh allocation than a standard realloc.