Display the source code in std/mmfile.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Module `std.mmfile`

Read and write memory mapped files.

Memory mapped files are a mechanism in operating systems that allows file access through virtual memory. After opening a file with MmFile, the contents can be read from or written to with standard slice / pointer operations. Changes to the memory are automatically reflected in the underlying file.

Memory mapping can increase I/O performance of large files, compared to buffered read / write operations from std.file and std.stdio. However, I/O errors are not handled as safely: when for example the disk that the file is on gets removed, reading from it may result in a segfault.

References

https://en.wikipedia.org/wiki/Memory-mapped_file

Classes

Name	Description
`MmFile`	MmFile objects control the memory mapped file resource.

Authors

Walter Bright, Matthew Wilson

License

Boost License 1.0.