lock a file

Only multiple attempts to save to a browser definition file or open a file handle can lock a browser definition file.

只有在多次尝试保存到浏览器定义文件或者打开某个文件句柄时，才会锁定浏览器定义文件。

Unable to lock a region of a file.

无法锁定文件区域。

From this output, you can see that the fcntl() function has been called to a set a lock on a file.

在输出中可以看到，已经调用了fcntl（）函数，它要在一个文件上设置锁。

A checkout discourages others from modifying a file , and a lock prevents them from doing so.

签出妨碍了别人修改文件, 即一个锁阻止别人对文件的修改.

A POSIX file lock based cache coherence protocol ( LBCCP) is presented, which can tune file sharing semantics dynamically.

本文创造性的工作主要有三个方面：（1）提出了一种基于POSIX文件锁的缓存一致性协议LBCCP，该协议能够在文件粒度支持动态调整文件共享语义。

Use the same thread to lock and unlock a file.

使用相同的线程来锁定和解锁文件。

When a new deployment of the code is prepared, and composer install is run, Composer will look first for a lock file.

当准备好一个代码的新部署，并且运行了composer install的时候，Composer会首先查找一个锁定文件。

At last, a simple lock technique is implemented to synchronize network file operations.

最后采用一种锁机制保证了网络文件操作的同步。