Async practice problems in Rust

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Showing 20 of 20

Title	Difficulty	Category
A logical-time reactor: timers without a clock	Hard	End-to-End
Async recursion, async closures, and streams	Hard	Research
`block_on`: the smallest thing that can run a future	Easy	Primitives
Cancellation is just: stop polling and drop	Medium	Framework
Cancel safety, blocking, and locks across `.await`	Hard	End-to-End
Capstone: an async executor with a logical-time reactor	Hard	End-to-End
Countdown futures and the shape of `Pending`	Easy	Primitives
Fairness and starvation in your scheduler	Medium	Framework
Futures are lazy: nothing happens until you poll	Easy	Primitives
Hand-compile an `async fn` into a state machine	Hard	Framework
Hand-rolling `join`: running two futures concurrently	Medium	Framework
Hand-rolling `select`: racing futures and dropping the loser	Medium	Framework
Implementing `Wake`: a real task waker and the lost-wakeup bug	Medium	Framework
`poll_fn`: a future from a closure	Easy	Primitives
`RawWaker` and `RawWakerVTable`: building a `Waker` with unsafe	Hard	Framework
Spawning, `JoinHandle`, and getting values back out	Hard	End-to-End
Structural pinning and safe pin projection by hand	Hard	Research
The `Future` trait: `Output`, `Poll`, and your first hand-written future	Easy	Primitives
The minimal single-threaded executor	Hard	End-to-End
`Unpin` in practice: making `Pin<&mut Self>` usable without unsafe	Medium	Framework