Type Alias SendableDataPtr 

type SendableDataPtr = Sendable<*mut u8>;

Wrapper to make *mut u8 pointers Send for cross-thread routing.

Unlike SendablePtr<T> in externalptr, this allows null pointers since allocator operations can fail and return null.

Safety

Same safety model as Sendable<T> and SendablePtr:

• The pointer value (memory address) is safely transmitted between threads
• The pointer is only dereferenced on R’s main thread
• This is guaranteed by the with_r_thread_or_inline routing mechanism

Aliased Type

struct SendableDataPtr(/* private fields */);