[ARROW-2701] [C++] Make MemoryMappedFile resizable

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.10.0
• Component/s: C++
• Labels: pull-request-available
• Flags: Patch
• External issue URL: https://github.com/apache/arrow/pull/2205
• Assignee: Dimitri Vorona
• Reporter: Dimitri Vorona
• Created: 12/Jun/18 16:51
• Updated: 11/Jan/23 07:22
• Resolved: 25/Jul/18 02:55

Description

Hi,

I don't see any reason for the MemoryMappedFile not to be resizable, e.g. like it is in Python stdlib. This patch changes the base class of MemoryMappedFile to ResizableBuffer and implements mmap resizing similar to mmap.resize from python stdlib.

If the change is ok, we should probably change the comment here, too.

Cheers,

Dimitri.

Issue Links

• links to: GitHub Pull Request #2134
• links to: GitHub Pull Request #2205