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use crate::sys::locks as imp;
use crate::sys_common::mutex::MovableMutex;
use crate::time::Duration;
mod check;
type CondvarCheck = <imp::MovableMutex as check::CondvarCheck>::Check;
/// An OS-based condition variable.
pub struct Condvar {
inner: imp::MovableCondvar,
check: CondvarCheck,
}
impl Condvar {
/// Creates a new condition variable for use.
#[inline]
#[rustc_const_stable(feature = "const_locks", since = "1.63.0")]
pub const fn new() -> Self {
Self { inner: imp::MovableCondvar::new(), check: CondvarCheck::new() }
}
/// Signals one waiter on this condition variable to wake up.
#[inline]
pub fn notify_one(&self) {
unsafe { self.inner.notify_one() };
}
/// Awakens all current waiters on this condition variable.
#[inline]
pub fn notify_all(&self) {
unsafe { self.inner.notify_all() };
}
/// Waits for a signal on the specified mutex.
///
/// Behavior is undefined if the mutex is not locked by the current thread.
///
/// May panic if used with more than one mutex.
#[inline]
pub unsafe fn wait(&self, mutex: &MovableMutex) {
self.check.verify(mutex);
self.inner.wait(mutex.raw())
}
/// Waits for a signal on the specified mutex with a timeout duration
/// specified by `dur` (a relative time into the future).
///
/// Behavior is undefined if the mutex is not locked by the current thread.
///
/// May panic if used with more than one mutex.
#[inline]
pub unsafe fn wait_timeout(&self, mutex: &MovableMutex, dur: Duration) -> bool {
self.check.verify(mutex);
self.inner.wait_timeout(mutex.raw(), dur)
}
}
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