线程安全否定AtomicBoolean get（）作为while循环中的条件(Thread-safe negated AtomicBoolean get() as a condition in a while loop)

 假设我有以下代码： 
 
AtomicBoolean condition;
condition = new AtomicBoolean(false);
(...)
while(!condition.get()){
   // do some stuff
}
 
 我知道condition.get()是原子 ，但是，也是!condition.get()原子？ 
 
 我的意思是，是否可能发生一个Thread以原子方式读取布尔值，然后在应用! 操作，以便另一个Thread进入循环之前？ 如果是这样的话，使用如下函数会更好吗？ 
 
private synchronized boolean checkNegatedCondition(AtomicBoolean cond){
    return !cond.get();
}

(...)

while(checkNegatedCondition(condition)){
   // do some stuff
}
 
 提前致谢。 

Suppose I have the following code:
 
AtomicBoolean condition;
condition = new AtomicBoolean(false);
(...)
while(!condition.get()){
   // do some stuff
}
 
I know that condition.get() is atomic, but, is !condition.get() atomic as well?
 
I mean, could it happen that one Thread read the boolean value atomically and then it were interrupted before applying the ! operation, so that another Thread gets into the loop before? If that's the case, would it be better to use a function such as:
 
private synchronized boolean checkNegatedCondition(AtomicBoolean cond){
    return !cond.get();
}

(...)

while(checkNegatedCondition(condition)){
   // do some stuff
}
 
Thanks in advance.

原文：https://stackoverflow.com/questions/45673934