pub fn run<F>(nworkers: usize, f: F) -> RuntimeHandle
    where
        F: FnOnce(&Runtime, usize) + Clone + Send + 'static,
    {
        let mut workers = Vec::with_capacity(nworkers);

        let runtime = Self(Arc::new(RuntimeInner::new(nworkers)));

        for i in 0..nworkers {
            let runtime = runtime.clone();
            let f = f.clone();
            let builder = Builder::new().name(format!("worker{}", i));

            let (init_sender, init_receiver) = sync_channel(0);

            let join_handle = builder
                .spawn(move || {
                    init_sender
                        .send((
                            PARKER.with(|parker| parker.unparker().clone()),
                            KILL_SIGNAL.with(|s| s.clone()),
                        ))
                        .unwrap();
                    f(&runtime, i);
                })
                .unwrap_or_else(|_| panic!("failed to spawn worker thread {}", i));

            let (unparker, kill_signal) = init_receiver.recv().unwrap();
            workers.push(WorkerHandle::new(join_handle, unparker, kill_signal));
        }

        RuntimeHandle::new(runtime, workers)
    }
/// Create a new runtime with `nworkers` worker threads and run a
/// user-provided closure in each thread.  The closure takes a reference
/// to the `Runtime` as an argument, so that workers can access shared
/// services provided by the runtime.
///
/// Returns a handle through which the caller can interact with the runtime.
///
/// # Arguments
///
/// * `nworkers` - the number of worker threads to spawn.
///
/// * `f` - closure that will be invoked in each worker thread.  Normally,
///   this closure builds and runs a circuit.  The first argument of the
///   closure is a reference to the `Runtime`, the second argument is the
///   index of the worker thread within the runtime.
///
/// # Examples
/// ```
/// use dbsp::circuit::{Root, Runtime};
///
/// // Create a runtime with 4 worker threads.
/// let hruntime = Runtime::run(4, |runtime, index| {
///     // This closure runs within each worker thread.
///
///     let root = Root::build(move |circuit| {
///         // Populate `circuit` with operators.
///     })
///     .unwrap();
///
///     // Run circuit for 100 clock cycles.
///     for _ in 0..100 {
///         root.step().unwrap();
///     }
/// });
///
/// // Wait for all worker threads to terminate.
/// hruntime.join().unwrap();
/// ```
Create a new runtime with `nworkers` worker threads and run a
user-provided closure in each thread.  The closure takes a reference
to the `Runtime` as an argument, so that workers can access shared
services provided by the runtime.

Returns a handle through which the caller can interact with the runtime.
Create a new runtime with ` nworkers ` worker threads and run a user - provided closure in each thread . The closure takes a reference to the ` Runtime ` as an argument so that workers can access shared services provided by the runtime . Returns a handle through which the caller can interact with the runtime .
pub fn run<F>(nworkers: usize, f: F) -> RuntimeHandle
    where
        F: FnOnce(&Runtime, usize) + Clone + Send + 'static,
    {
        let mut workers = Vec::with_capacity(nworkers);
        let runtime = Self(Arc::new(RuntimeInner::new(nworkers)));
        for i in 0..nworkers {
            let runtime = runtime.clone();
            let f = f.clone();
            let builder = Builder::new().name(format!("worker{}", i));
            let (init_sender, init_receiver) = sync_channel(0);
            let join_handle = builder
                .spawn(move || {
                    init_sender
                        .send((
                            PARKER.with(|parker| parker.unparker().clone()),
                            KILL_SIGNAL.with(|s| s.clone()),
                        ))
                        .unwrap();
                    f(&runtime, i);
                })
                .unwrap_or_else(|_| panic!("failed to spawn worker thread {}", i));
            let (unparker, kill_signal) = init_receiver.recv().unwrap();
            workers.push(WorkerHandle::new(join_handle, unparker, kill_signal));
        }
        RuntimeHandle::new(runtime, workers)
    }
pub fn run < F > ( nworkers : usize , f : F ) -> RuntimeHandle where F : FnOnce ( & Runtime , usize ) + Clone + Send + ' static , { let mut workers = Vec :: with_capacity ( nworkers ) ; let runtime = Self ( Arc :: new ( RuntimeInner :: new ( nworkers ) ) ) ; for i in 0 .. nworkers { let runtime = runtime . clone ( ) ; let f = f . clone ( ) ; let builder = Builder :: new ( ) . name ( format ! ( " " i ) ) ; let ( init_sender , init_receiver ) = sync_channel ( 0 ) ; let join_handle = builder . spawn ( move | | { init_sender . send ( ( PARKER . with ( | parker | parker . unparker ( ) . clone ( ) ) , KILL_SIGNAL . with ( | s | s . clone ( ) ) , ) ) . unwrap ( ) ; f ( & runtime , i ) ; } ) . unwrap_or_else ( | _ | panic ! ( " " i ) ) ; let ( unparker , kill_signal ) = init_receiver . recv ( ) . unwrap ( ) ; workers . push ( WorkerHandle :: new ( join_handle , unparker , kill_signal ) ) ; } RuntimeHandle :: new ( runtime , workers ) }
Create a new runtime with `nworkers` worker threads and run a
user-provided closure in each thread.
Create a new runtime with ` nworkers ` worker threads and run a user - provided closure in each thread .
nworkers
usize
f
F
examples
```
use dbsp::circuit::{Root, Runtime}.

Create a runtime with 4 worker threads.
let hruntime = Runtime::run(4, |runtime, index| {
This closure runs within each worker thread.

let root = Root::build(move |circuit| {
Populate `circuit` with operators.

Run circuit for 100 clock cycles.

Wait for all worker threads to terminate.
` ` ` use dbsp :: circuit :: { Root Runtime } . Create a runtime with 4 worker threads . let hruntime = Runtime :: run ( 4 |runtime index| { This closure runs within each worker thread . let root = Root :: build ( move |circuit| { Populate ` circuit ` with operators . Run circuit for 100 clock cycles . Wait for all worker threads to terminate .