When a lock is released, the system chooses the thread from the front of the highest-priority queue of contenders to try to lock the object.
释放锁以后，系统从争用者的最高优先级队列的前端选择线程，以便试图锁定对象。
Priority-based FIFO behavior — as in the earlier synchronization example where the highest-priority thread is chosen to execute next — also applies to the queues of lock contenders and lock waiters.
基于优先级的FIFO行为——在前面的同步示例中，将接着执行具有最高优先级的线程——也适用于锁争用者和锁等待者的队列。
A lock release or lock notify operation is analogous to a scheduling dispatch operation in the sense that the thread at the head of the highest-priority queue is acted on.
锁释放或锁notify操作与调度分派操作类似，因为都是对最高优先级队列头部的线程起作用。
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