safina-threadpool

A threadpool.

You can use it alone or with safina, a safe async runtime.

Features

• Add a closure or FnOnce to the pool and one of the threads will execute it
• Automatically restarts panicked threads
• Retries after failing to spawn a thread
• Drop the ThreadPool struct to stop all idle threads.
• Destroy the pool and wait for all threads to stop
• forbid(unsafe_code)
• Depends only on std
• 100% test coverage

Limitations

• Not optimized

Examples

let pool =
    safina_threadpool::ThreadPool::new("worker", 2).unwrap();
let receiver = {
    let (sender, receiver) =
        std::sync::mpsc::channel();
    for data in data_source {
        let sender_clone = sender.clone();
        pool.schedule(
            move || process_data(data, sender_clone));
    }
    receiver
};
let results: Vec<ProcessResult> =
    receiver.iter().collect();
// ...

Alternatives

• blocking
  • Popular
  • A little unsafe code
  • blocking/issues/24: Recover from thread spawn failure
• threadpool
  • Popular
  • Well maintained
  • Dependencies have unsafe code
  • rust-threadpool/issues/97: Feature: provide a way to shutdown the thread pool
  • Panics when failing to spawn a thread.
• scoped_threadpool
  • Popular
  • Contains unsafe code
  • Unmaintained
  • Does not restart workers on panic.
• scheduled-thread-pool
  • Used by a popular connection pool library
  • Dependencies have unsafe code
  • Schedule jobs to run immediately, periodically, or after a specified delay.
• workerpool
  • Dependencies have unsafe code
• threads_pool
  • Full of unsafe
• thread-pool
  • Old
  • Dependencies have unsafe code
• tasque
  • Dependencies have unsafe code
• fast-threadpool
  • Dependencies have unsafe code
• blocking-permit
  • Full of unsafe
• rayon-core
  • Full of unsafe

Changelog

TO DO

• Make join and try_join work with Arc<ThreadPool>.
• Log a warning when all threads panicked.
• Update test coverage.
• Add a public respawn_threads function.
• Add a stress test
• Add a benchmark. See benchmarks in https://crates.io/crates/executors
• Add a way for a job to schedule another job on the same thread, with stealing.

License: Apache-2.0