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Condvar

Struct Condvar 

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pub struct Condvar {
    pub inner: UPIntrFreeCell<CondvarInner>,
}
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Condvar

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§inner: UPIntrFreeCell<CondvarInner>

UPIntrFreeCell

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impl Condvar

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pub fn new() -> Self

创建一个新的条件变量。

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pub fn signal(&self) -> Option<ThreadId>

唤醒某个阻塞在当前条件变量上的线程

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pub fn wait_no_sched(&self, tid: ThreadId) -> bool

将当前线程阻塞在条件变量上

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pub fn wait_with_mutex( &self, tid: ThreadId, mutex: Arc<dyn Mutex>, ) -> (bool, Option<ThreadId>)

从 mutex 的锁中释放一个线程,并将其阻塞在条件变量的等待队列中,等待其他线程运行完毕,当前的线程再试图获取这个锁

注意:下面是简化版的实现,在 mutex 唤醒一个线程之后,当前线程就直接获取这个 mutex,不管能不能获取成功 这里是单纯为了过测例,

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