Rust: What is the difference between sync::Barrier and tokio::sync::Barrier?

sync::Barrier — blocking. tokio::sync::Barrier — async.

sync::Barrier:

• Blocking.
• Blocks thread.
• For sync code.

tokio::sync::Barrier:

• Async.
• Non-blocking.
• For async code.

1// Blocking
2use std::sync::Barrier;
3let barrier = Barrier::new(5);
4barrier.wait();
5
6// Async
7use tokio::sync::Barrier;
8let barrier = Barrier::new(5);
9barrier.wait().await;

Key: std for blocking, tokio for async.