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5 | */ | |
6 | ||
7 | package java.util.concurrent; | |
8 | < | import java.util.*; |
9 | < | import java.util.concurrent.locks.*; |
8 | > | import java.util.Collection; |
9 | > | import java.util.concurrent.locks.AbstractQueuedSynchronizer; |
10 | ||
11 | /** | |
12 | * A counting semaphore. Conceptually, a semaphore maintains a set of |
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