1 use crate::future::Future; 2 use crate::loom::sync::Arc; 3 use crate::runtime::scheduler::multi_thread::worker; 4 use crate::runtime::{ 5 blocking, driver, 6 task::{self, JoinHandle}, 7 }; 8 use crate::util::RngSeedGenerator; 9 10 use std::fmt; 11 12 cfg_metrics! { 13 mod metrics; 14 } 15 16 cfg_taskdump! { 17 mod taskdump; 18 } 19 20 /// Handle to the multi thread scheduler 21 pub(crate) struct Handle { 22 /// Task spawner 23 pub(super) shared: worker::Shared, 24 25 /// Resource driver handles 26 pub(crate) driver: driver::Handle, 27 28 /// Blocking pool spawner 29 pub(crate) blocking_spawner: blocking::Spawner, 30 31 /// Current random number generator seed 32 pub(crate) seed_generator: RngSeedGenerator, 33 } 34 35 impl Handle { 36 /// Spawns a future onto the thread pool spawn<F>(me: &Arc<Self>, future: F, id: task::Id) -> JoinHandle<F::Output> where F: crate::future::Future + Send + 'static, F::Output: Send + 'static,37 pub(crate) fn spawn<F>(me: &Arc<Self>, future: F, id: task::Id) -> JoinHandle<F::Output> 38 where 39 F: crate::future::Future + Send + 'static, 40 F::Output: Send + 'static, 41 { 42 Self::bind_new_task(me, future, id) 43 } 44 shutdown(&self)45 pub(crate) fn shutdown(&self) { 46 self.close(); 47 } 48 bind_new_task<T>(me: &Arc<Self>, future: T, id: task::Id) -> JoinHandle<T::Output> where T: Future + Send + 'static, T::Output: Send + 'static,49 pub(super) fn bind_new_task<T>(me: &Arc<Self>, future: T, id: task::Id) -> JoinHandle<T::Output> 50 where 51 T: Future + Send + 'static, 52 T::Output: Send + 'static, 53 { 54 let (handle, notified) = me.shared.owned.bind(future, me.clone(), id); 55 56 me.schedule_option_task_without_yield(notified); 57 58 handle 59 } 60 } 61 62 cfg_unstable! { 63 use std::num::NonZeroU64; 64 65 impl Handle { 66 pub(crate) fn owned_id(&self) -> NonZeroU64 { 67 self.shared.owned.id 68 } 69 } 70 } 71 72 impl fmt::Debug for Handle { fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result73 fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { 74 fmt.debug_struct("multi_thread::Handle { ... }").finish() 75 } 76 } 77