pub fn try_pop(&self) -> Option<T> {
        let txn = self.available.sub();
        let permit = self.semaphore.try_acquire().ok()?;
        let item = self.queue.pop().unwrap();
        txn.commit();
        permit.forget();
        Some(item)
    }
/// Try to get an item from the queue. If the queue is currently
/// empty return None instead.
Try to get an item from the queue. If the queue is currently
empty return None instead.
Try to get an item from the queue . If the queue is currently empty return None instead .
pub fn try_pop(&self) -> Option<T> {
        let txn = self.available.sub();
        let permit = self.semaphore.try_acquire().ok()?;
        let item = self.queue.pop().unwrap();
        txn.commit();
        permit.forget();
        Some(item)
    }
pub fn try_pop ( & self ) -> Option < T > { let txn = self . available . sub ( ) ; let permit = self . semaphore . try_acquire ( ) . ok ( ) ? ; let item = self . queue . pop ( ) . unwrap ( ) ; txn . commit ( ) ; permit . forget ( ) ; Some ( item ) }
Try to get an item from the queue.
Try to get an item from the queue .
&self
&self