unique_lock中std::try_to_lock

std::try_to_lock是std::unique_lock的一个构造函数参数，在使用中可以用于尝试上锁。当使用std::try_to_lock参数创建std::unique_lock对象时，对象会尝试上锁但不会阻塞线程。如果对象成功上锁，则owns_lock()函数返回true，反之返回false。这种方式可以用于避免线程阻塞，而是根据锁的可用性来采取相应的操作。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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