Method try_wait

include/dmlc/blockingconcurrentqueue.h:96–100

			}

			bool try_wait()
			{
				const unsigned long RC_WAIT_TIMEOUT = 0x00000102;
				return WaitForSingleObject(m_hSema, 0) != RC_WAIT_TIMEOUT;
			}

			bool timed_wait(std::uint64_t usecs)
			{