Crate desync [] [src]


This library provides an alternative synchronisation mechanism to the usual threads/mutexes system. Instead of managing the threads, this focuses on managing the data, which largely does away with the need for many synchronisation primitives. Support for futures is provided to help interoperate with other Rust libraries.

There is a single new synchronisation object: Desync. You create one like this:

use desync::Desync;
let number = Desync::new(0);

It supports two main operations. async will schedule a new job for the object that will run in a background thread. It's useful for deferring long-running operations and moving updates so they can run in parallel.

let number = Desync::new(0);
number.async(|val| {
    // Long update here
    *val = 42;
// We can carry on what we're doing with the update now running in the background

The other operation is sync, which schedules a job to run synchronously on the data structure. This is useful for retrieving values from a Desync.

let new_number = number.sync(|val| *val);           // = 42

Desync objects always run operations in the order that is provided, so all operations are serialized from the point of view of the data that they contain. When combined with the ability to perform operations asynchronously, this provides a useful way to immediately parallelize long-running operations.

There's one final operation to be aware of and that's future. This returns a boxed Future that can be used with other libraries that use them. It's conceptually the same as sync, except that it doesn't wait for the operation to complete:

let future_number = number.future(|val| *val);
assert!(executor::spawn(future_number).wait_future().unwrap() == 42);


pub use desync::*;