You might ask: why not use the actual time? Unfortunately, accurately syncing clocks between two computers is an extremely hard problem. Using incrementing integers like this is one simple version of a logical clock Logical clock - Wikipedia en.wikipedia.org/wiki/Logical_clock , which captures the order of events relative to each other rather than to the “wall clock”. ↩
if (thread == null) // 已被唤醒
。关于这个话题，下载安装 谷歌浏览器 开启极速安全的 上网之旅。提供了深入分析
between different OS and distributions as possible. This can lead to a
86세 전원주 “춤추다 낙상해 고관절 골절…다 고친뒤 나오겠다”