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#![unstable(feature = "wake_trait", issue = "69912")]
use core::mem::{self, ManuallyDrop};
use core::task::{RawWaker, RawWakerVTable, Waker};
use crate::sync::Arc;
#[unstable(feature = "wake_trait", issue = "69912")]
pub trait Wake {
    
    #[unstable(feature = "wake_trait", issue = "69912")]
    fn wake(self: Arc<Self>);
    
    
    
    
    
    #[unstable(feature = "wake_trait", issue = "69912")]
    fn wake_by_ref(self: &Arc<Self>) {
        self.clone().wake();
    }
}
#[unstable(feature = "wake_trait", issue = "69912")]
impl<W: Wake + Send + Sync + 'static> From<Arc<W>> for Waker {
    fn from(waker: Arc<W>) -> Waker {
        
        
        unsafe { Waker::from_raw(raw_waker(waker)) }
    }
}
#[unstable(feature = "wake_trait", issue = "69912")]
impl<W: Wake + Send + Sync + 'static> From<Arc<W>> for RawWaker {
    fn from(waker: Arc<W>) -> RawWaker {
        raw_waker(waker)
    }
}
#[inline(always)]
fn raw_waker<W: Wake + Send + Sync + 'static>(waker: Arc<W>) -> RawWaker {
    
    unsafe fn clone_waker<W: Wake + Send + Sync + 'static>(waker: *const ()) -> RawWaker {
        let waker: Arc<W> = Arc::from_raw(waker as *const W);
        mem::forget(Arc::clone(&waker));
        raw_waker(waker)
    }
    
    unsafe fn wake<W: Wake + Send + Sync + 'static>(waker: *const ()) {
        let waker: Arc<W> = Arc::from_raw(waker as *const W);
        <W as Wake>::wake(waker);
    }
    
    unsafe fn wake_by_ref<W: Wake + Send + Sync + 'static>(waker: *const ()) {
        let waker: ManuallyDrop<Arc<W>> = ManuallyDrop::new(Arc::from_raw(waker as *const W));
        <W as Wake>::wake_by_ref(&waker);
    }
    
    unsafe fn drop_waker<W: Wake + Send + Sync + 'static>(waker: *const ()) {
        mem::drop(Arc::from_raw(waker as *const W));
    }
    RawWaker::new(
        Arc::into_raw(waker) as *const (),
        &RawWakerVTable::new(clone_waker::<W>, wake::<W>, wake_by_ref::<W>, drop_waker::<W>),
    )
}