A cache semaphore was not held when expected .

未按要求保留缓存信号。

These limitations also lessened the effectiveness of the semaphore , a modern precursor to the electric telegraph .

这些限制也削弱了旗语（电报的先驱）的作用。

It 's not infeasible to interrupt threads that are holding permits beyond the new upper limit , but that 's beyond the scope of a simple semaphore .

去打断已经拥有许可的线程，但又不在新限制约束范围内是不可取的，那已经超出了简单信号量的讨论范围了。

Opens an existing named semaphore .

打开一个现有的已命名信号量。

Console messages track semaphore use .

控制台消息对信号量的使用进行跟踪。