Crate timely_communication [−] [src]
A simple communication infrastructure providing typed exchange channels.
This crate is part of the timely dataflow system, used primarily for its inter-worker communication. It may be indepedently useful, but it is separated out mostly to make clear boundaries in the project.
Threads are spawned with an allocator::Generic
, whose allocate
method returns a pair of several send endpoints and one
receive endpoint. Messages sent into a send endpoint will eventually be received by the corresponding worker,
if it receives often enough. The point-to-point channels are each FIFO, but with no fairness guarantees.
To be communicated, a type must implement the Serialize
trait. A default implementation of Serialize
is
provided for any type implementing Abomonation
. To implement other serialization strategies, wrap your type
and implement Serialize
for your wrapper.
Channel endpoints also implement a lower-level push
and pull
interface (through the Push
and Pull
traits), which is used for more precise control of resources.
Examples
// configure for two threads, just one process. let config = communication::Configuration::Process(2); // initailizes communication, spawns workers communication::initialize(config, |mut allocator| { println!("worker {} started", allocator.index()); // allocates pair of senders list and one receiver. let (mut senders, mut receiver) = allocator.allocate(); // send typed data along each channel senders[0].send(format!("hello, {}", 0)); senders[1].send(format!("hello, {}", 1)); // no support for termination notification, // we have to count down ourselves. let mut expecting = 2; while expecting > 0 { if let Some(message) = receiver.recv() { println!("worker {}: received: <{}>", allocator.index(), message); expecting -= 1; } } });
The should produce output like:
worker 0 started worker 1 started worker 0: received: <hello, 0> worker 1: received: <hello, 1> worker 0: received: <hello, 0> worker 1: received: <hello, 1>
Reexports
pub use allocator::Generic as Allocator; |
pub use allocator::Allocate; |
pub use initialize::{initialize, Configuration}; |
Modules
allocator |
Types and traits for the allocation of channels between threads, process, and computers. |
initialize |
Initialization logic for a generic instance of the |
Traits
Data |
A composite trait for types that may be used with channels. |
Pull |
Pulling elements of type |
Push |
Pushing elements of type |
Serialize |
Conversions to and from |