| 术语 | file lockout |
| 释义 | file lockout 文件封锁;［档封锁］ An adverse situation which can occur in multiprogramming or multitasking environments. Two simultaneously active programs each request the same two files for updating and each is granted exclusive access to one but cannot proceed without access to the other; hence both programs are “stranded” in a incomplete stage and continue to occupy main storage and CPU cycles as well as preventing other tasks from using the files. Several techniques have evolved to prevent this situation. 在多道程序或多任务环境下可能发生的一种不利情况,当两个同时活动的程序每一个都 申请同样的两个文件进行更新时,假定两个程序访问同一文件是互斥的,而且不访问另一个 文件就不能继续向前运行,因而两个程序都处于未完成状态,并继续占据主存和CPU周期,还 阻止其它作业程序使用这些文件。现已发展了几种技术来防止这种情况的产生。 |
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