| 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 |
| } |
| } |