Windows上的fadvise/madvise等效项是什么?

问题描述

例如，在UNIX上，我可以使用posix_fadvise(POSIX_FADV_WILLNEED)告诉操作系统将来将需要映射.然后，如果有必要，它将预读数据.

On UNIX, I can, for example, tell the OS that the mapping will be needed in the future with posix_fadvise(POSIX_FADV_WILLNEED). It will then read-ahead the data if it feels so.

如何告知打算访问Windows?

How to tell the access intend to Windows ?

推荐答案

实际上，正如安德斯(Anders)最常建议的那样，在Windows 7和更早版本中可用的内存管理功能中没有这种方法.

Actually, as Anders mostly suggested, there is no such method in the memory management functions available in Windows 7 and earlier.

存在两种类似的方法:

• 使用 ReadFileEx 异步读取数据.以后需要时，数据可能仍会保留在文件缓存中.
• 使用 CreateFile .预读可能会自动完成.

• Read the data asynchronously with ReadFileEx. The data might then still be in the file cache when needed later.
• Open the file with a streaming hint with the FILE_FLAG_SEQUENTIAL_SCAN attribute of CreateFile. Readahead would then perhaps be automatically done.

这篇关于Windows上的fadvise/madvise等效项是什么?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！