Questions tagged «semaphore»

1
为什么将信号量称为信号量?
在我看来,铁路信号灯比任何其他通用信号对象(例如旗帜或交通信号灯)对信号灯的描述都更好。甚至像钥匙圈之类的东西(人们将钥匙从环上取下来以访问锁定的资源,然后在完成后返回它们)更具描述性。那么为什么一个信号量被称为信号量呢?
12 semaphore 
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