键盘是否被锁定？
客户端采用状态来确定操作是否可执行(那就是，文件是否被锁定)。
The client USES the state to determine whether the operation can be performed (that is, whether the file is locked).
不管数据行是否被提交，以及根据语句的谓词它是否被排除，对于索引扫描和表访问都执行这样的锁定操作。
This locking was done for both index scans and table access whether or not the row of data was committed or whether it would have been excluded based on the statement's predicates.
您还可以使用 pthread_mutex_trylock()来测试某个互斥是否已经被锁定，而不需要真正 地去锁定它。
You can also use the pthread_mutex_trylock() to test whether a mutex is locked without actually blocking it.
版面状态-在下拉选单中，你可以选择是否锁定该版面。一个被锁定的版面只允许版面管理员以及系统管理员发表文章和主题。
Forum Status - a dropdown list box that will allow you to lock or unlock a forum. A locked forum may not be posted to except by moderators and administrators.
版面状态-在下拉选单中，你可以选择是否锁定该版面。一个被锁定的版面只允许版面管理员以及系统管理员发表文章和主题。
Forum Status - a dropdown list box that will allow you to lock or unlock a forum. A locked forum may not be posted to except by moderators and administrators.
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