Pour utiliser le modèle de filetage M:N
dans Rust, j'ouvre une piscine et commence les tâches de frai comme d'habitude. The Green Documentation donne l'exemple suivant:Gestion des fils verts
#![feature(phase)]
#[phase(plugin)] extern crate green;
green_start!(main)
fn main() {
// Running inside a green pool
// Spawn more green threads?
for x in some_thing.iter() {
spawn(proc() {
some_task()
});
}
}
Si vous vouliez ajouter dynamiquement un autre thread OS, on pourrait faire quelque chose comme ceci:
extern crate green;
extern crate rustuv;
use std::task::TaskBuilder;
use green::{SchedPool, PoolConfig, GreenTaskBuilder};
let mut config = PoolConfig::new();
// Optional: Set the event loop to be rustuv's to allow I/O to work
config.event_loop_factory = rustuv::event_loop;
let mut pool = SchedPool::new(config);
// Spawn tasks into the pool of schedulers
TaskBuilder::new().green(&mut pool).spawn(proc() {
// this code is running inside the pool of schedulers
spawn(proc() {
// this code is also running inside the same scheduler pool
});
});
// Dynamically add a new scheduler to the scheduler pool. This adds another
// OS thread that green threads can be multiplexed on to.
let mut handle = pool.spawn_sched();
// Pin a task to the spawned scheduler
TaskBuilder::new().green_pinned(&mut pool, &mut handle).spawn(proc() {
/* ... */
});
// Handles keep schedulers alive, so be sure to drop all handles before
// destroying the sched pool
drop(handle);
// Required to shut down this scheduler pool.
// The task will fail if `shutdown` is not called.
pool.shutdown();
Est-il possible de dire utiliser x num de threads OS, ou doivent-ils être créés et gérés dans le code?