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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};
pub struct Condvar {
inner: SpinMutex<WaitVariable<()>>,
}
pub(crate) type MovableCondvar = LazyBox<Condvar>;
impl LazyInit for Condvar {
fn init() -> Box<Self> {
Box::new(Self::new())
}
}
impl Condvar {
pub const fn new() -> Condvar {
Condvar { inner: SpinMutex::new(WaitVariable::new(())) }
}
#[inline]
pub unsafe fn notify_one(&self) {
let _ = WaitQueue::notify_one(self.inner.lock());
}
#[inline]
pub unsafe fn notify_all(&self) {
let _ = WaitQueue::notify_all(self.inner.lock());
}
pub unsafe fn wait(&self, mutex: &Mutex) {
let guard = self.inner.lock();
WaitQueue::wait(guard, || unsafe { mutex.unlock() });
unsafe { mutex.lock() }
}
pub unsafe fn wait_timeout(&self, mutex: &Mutex, dur: Duration) -> bool {
let success = WaitQueue::wait_timeout(&self.inner, dur, || unsafe { mutex.unlock() });
unsafe { mutex.lock() };
success
}
}
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