1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

cfg_rt_core! {
    use crate::runtime::basic_scheduler;
    use crate::task::JoinHandle;

    use std::future::Future;
}

cfg_rt_threaded! {
    use crate::runtime::thread_pool;
}

#[derive(Debug, Clone)]
pub(crate) enum Spawner {
    Shell,
    #[cfg(feature = "rt-core")]
    Basic(basic_scheduler::Spawner),
    #[cfg(feature = "rt-threaded")]
    ThreadPool(thread_pool::Spawner),
}

impl Spawner {
    pub(crate) fn shutdown(&mut self) {
        #[cfg(feature = "rt-threaded")]
        {
            if let Spawner::ThreadPool(spawner) = self {
                spawner.shutdown();
            }
        }
    }
}

cfg_rt_core! {
    impl Spawner {
        pub(crate) fn spawn<F>(&self, future: F) -> JoinHandle<F::Output>
        where
            F: Future + Send + 'static,
            F::Output: Send + 'static,
        {
            match self {
                Spawner::Shell => panic!("spawning not enabled for runtime"),
                #[cfg(feature = "rt-core")]
                Spawner::Basic(spawner) => spawner.spawn(future),
                #[cfg(feature = "rt-threaded")]
                Spawner::ThreadPool(spawner) => spawner.spawn(future),
            }
        }
    }
}