Module std::thread

Multi-threading support

See also the sync module for synchronization primitives.

Modules

Structs

Functions

• fn spawn<T, F>(func: F) -> JoinHandle<T>

  F: Fn() -> T

  source

  Spawn a new thread with default settings.

  The thread will execute the given function and then terminate. spawn returns a JoinHandle, which can be used to join the thread and retreive the value that the thread returned.

  See Builder as a means to customize thread creation options.

  Example

  use std::thread::{spawn, sleep};
  use std::time::Duration;
  
  let text = "The quick brown fox jumps over the lazy dog";
  
  let t = spawn(|=text| -> usize {
      // pretend that calculating the length is expensive
      sleep(Duration::from_secs(1));
      text.len()
  });
  
  println!("Calculating length of {}", text);
  println!("Length is {}", t.join().unwrap());
  Run this example

  Panic handling

  If the child thread panics, the process is not terminated automatically. Instead, the join function will return a JoinError with the panic information.

  If a thread is detached, a panic in the thread will terminate the process.

• fn sleep(duration: Duration)

  source

  Suspends thread execution for the specified duration.

  The sleep may sleep for less than the specified time if interrupted by a signal.

  Example

  use std::time::{Instant, Duration};
  use std::thread::sleep;
  
  let start = Instant::now();
  sleep(Duration::from_millis(500));
  
  assert!(Instant::now().duration_since(&start).total_secs() >= 0.5);
  Run this example

• fn yield()

  source

  Yields the execution of the current thread.

  You probably don't want to use this in a spin-lock.

  Example

  use std::time::Duration;
  
  /// A bad way to sleep. Use std::thread::sleep instead
  fn bad_sleep(duration: Duration) {
      use std::time::Instant;
      use std::thread::yield;
  
      let start = time::Instant::now();
      while Instant::now().duration_since(&start) < duration {
          yield();
      }
  }
  
  bad_sleep(Duration::from_millis(10));
  Run this example

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