Traits de Marcador

How does Rust know to forbid shared access across threads? The answer is in two traits:

• Send: un tipo T es Send si es seguro mover un T entre los límites de un hilo.
• Sync: un tipo T es Sync si es seguro mover un &T entre los límites de un hilo.

Send and Sync are unsafe traits. The compiler will automatically derive them for your types as long as they only contain Send and Sync types. You can also implement them manually when you know it is valid.