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std::shared_lock<Mutex>:: ~shared_lock

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std::shared_lock
~shared_lock ( ) ;
(自 C++14 起)

销毁锁。

如果 * this 关联了互斥量（ mutex() 返回非空指针）且已获得其所有权（ owns() 返回 true ），则通过调用 unlock_shared() 来解锁该互斥量。