第一个问题比较好理解: Process A:1spin_lock(&list_lock);2if(list_empty(&list_head)){3spin_unlock(&list_lock);4set_current_state(TASK_INTERRUPTIBLE);5schedule();6spin_lock(&list_lock);7}89/* Rest of the code ... */10spin_unlock(&list_lock);Process B:100spin_lock(&list_lock);...
如果消费者线程在检测count<=0,在执行wait()之前,生产者线程执行了count+1,并执行notify()唤醒,但是消费者线程并没有执行到wait(),导致唤醒失效,消费者线程会无法唤醒,该问题就是Lost Wake-Up Problem。 错误时序 如何解决该问题呢,可以将obj.wait()和obj.notify()放进obj对象锁的同步块中: 生产者伪代码: s...
所以,我们可以总结到,为了避免出现这种lost wake up问题,在这种模型之下,总应该将我们的代码放进去的同步块中。 Java强制我们的wait()/notify()调用必须要在一个同步块中(不然的话会报错),就是不想让我们在不经意间出现这种lost wake up问题。 不仅仅是这两个方法,包括java.util.concurrent.locks.Condition的aw...
这就是所谓的lost wake up问题。 解决办法 Java强制我们的wait()/notify()调用必须要在一个同步块中,就是不想让我们在不经意间出现这种lost wake up问题。否则会抛出IllegalMonitorStateException。 不仅仅是这两个方法,包括java.util.concurrent.locks.Condition的await()/signal()也必须要在同步块中: 参考链接:...
java 的wait Java的wait lost wake up 问题起源 事情得从一个多线程编程里面臭名昭著的问题"Lost wake-up problem"说起。 这个问题并不是说只在Java语言中会出现,而是会在所有的多线程环境下出现。 假如我们有两个线程,一个消费者线程,一个生产者线程。生产者线程的任务可以简化成将count加一,而后唤醒消费者;...
//好吧,我竟然写了个死锁。在mianbao==0 或者20的时候可能发生死锁 class Lanzi { public volatile int mianbao = 0; public static final int MAX = 20; public static final int min = 0; public Object proObj…
Not lost heart, is also lost, no matter how wake up, sleep is also slowly dying 翻译结果2复制译文编辑译文朗读译文返回顶部 Not lost heart, is also lost, no matter how wake up, sleep is also slowly dying 翻译结果3复制译文编辑译文朗读译文返回顶部 ...
In order to solve the family problem, he was 28 to find the gold watch andlet his parents, brothers and sisters have a full meal. He was 29 in the straw to have a rest 30 he heard a strange"tick-tock". He immediately held his breath and psten 31 . It was quieter in the barn...
The Lost Weekend: Directed by Billy Wilder. With Ray Milland, Jane Wyman, Phillip Terry, Howard Da Silva. The desperate life of a chronic alcoholic is followed through a four-day drinking bout.
And they took Jim and Eli!他们带走了Jed和EliNancy's gone!Nancy不见了They're gone.t他们逃了Which way did they go?他们往哪儿去了?Which way did they go?他们往哪儿去了?Wake up! Wake up!醒醒 醒醒Who are you? Talk to me! Wake up!你是谁? 说话啊 醒醒She's dead! 她死了She ...