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use crate::sys::locks::Mutex;
use crate::sys_common::lazy_box::{LazyBox, LazyInit};
use crate::time::Duration;
use super::waitqueue::{SpinMutex, WaitQueue, WaitVariable};
/// FIXME: `UnsafeList` is not movable.
struct AllocatedCondvar(SpinMutex<WaitVariable<()>>);
pub struct Condvar {
inner: LazyBox<AllocatedCondvar>,
}
impl LazyInit for AllocatedCondvar {
fn init() -> Box<Self> {
Box::new(AllocatedCondvar(SpinMutex::new(WaitVariable::new(()))))
}
}
impl Condvar {
pub const fn new() -> Condvar {
Condvar { inner: LazyBox::new() }
}
#[inline]
pub fn notify_one(&self) {
let _ = WaitQueue::notify_one(self.inner.0.lock());
}
#[inline]
pub fn notify_all(&self) {
let _ = WaitQueue::notify_all(self.inner.0.lock());
}
pub unsafe fn wait(&self, mutex: &Mutex) {
let guard = self.inner.0.lock();
WaitQueue::wait(guard, || unsafe { mutex.unlock() });
mutex.lock()
}
pub unsafe fn wait_timeout(&self, mutex: &Mutex, dur: Duration) -> bool {
let success = WaitQueue::wait_timeout(&self.inner.0, dur, || unsafe { mutex.unlock() });
mutex.lock();
success
}
}
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