use alloc::sync::Arc;
use core::mem;
-use core::time::Duration;
use sync::{Condvar, Mutex};
-use prelude::{Box, Vec};
+use prelude::*;
#[cfg(any(test, feature = "std"))]
-use std::time::Instant;
+use std::time::{Duration, Instant};
use core::future::Future as StdFuture;
use core::task::{Context, Poll};
use core::pin::Pin;
-use prelude::*;
/// Used to signal to one of many waiters that the condition they're waiting on has happened.
pub(crate) struct Notifier {
impl Future {
/// Registers a callback to be called upon completion of this future. If the future has already
/// completed, the callback will be called immediately.
+ ///
+ /// (C-not exported) use the bindings-only `register_callback_fn` instead
pub fn register_callback(&self, callback: Box<dyn FutureCallback>) {
let mut state = self.state.lock().unwrap();
if state.complete {
state.callbacks.push(callback);
}
}
+
+ // C bindings don't (currently) know how to map `Box<dyn Trait>`, and while it could add the
+ // following wrapper, doing it in the bindings is currently much more work than simply doing it
+ // here.
+ /// Registers a callback to be called upon completion of this future. If the future has already
+ /// completed, the callback will be called immediately.
+ #[cfg(c_bindings)]
+ pub fn register_callback_fn<F: 'static + FutureCallback>(&self, callback: F) {
+ self.register_callback(Box::new(callback));
+ }
}
mod std_future {
// waker, which we do here with a trivial Arc<AtomicBool> data element to track woke-ness.
const WAKER_V_TABLE: RawWakerVTable = RawWakerVTable::new(waker_clone, wake, wake_by_ref, drop);
unsafe fn wake_by_ref(ptr: *const ()) { let p = ptr as *const Arc<AtomicBool>; assert!(!(*p).fetch_or(true, Ordering::SeqCst)); }
- unsafe fn drop(ptr: *const ()) { let p = ptr as *mut Arc<AtomicBool>; Box::from_raw(p); }
+ unsafe fn drop(ptr: *const ()) { let p = ptr as *mut Arc<AtomicBool>; let _freed = Box::from_raw(p); }
unsafe fn wake(ptr: *const ()) { wake_by_ref(ptr); drop(ptr); }
unsafe fn waker_clone(ptr: *const ()) -> RawWaker {
let p = ptr as *const Arc<AtomicBool>;