| 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 |
| } |
| } |