Controls to allow users to choose between exclusive options. 控件以使用户能在互斥的选项之间进行选择。
Another way to implement mutual exclusion is to boost the thread priority to a level higher than all of the threads competing for a certain resource. 实现互斥的另一个方法是把线程的优先级提升到一个比其他所有与其竞争某个资源的线程更高的优先级。
