Dimitri Vorona created ARROW-2701:
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Summary: [C++] Make MemoryMappedFile resizable
Key: ARROW-2701
URL: https://issues.apache.org/jira/browse/ARROW-2701
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Affects Versions: 0.9.0
Reporter: Dimitri Vorona
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|https://github.com/python/cpython/blob/415bc46a78e785f357c8960ae70f18a6b6cccbb6/Modules/mmapmodule.c#L454]
from python stdlib.
If the change is ok, we should probably change the comment
[here|https://github.com/apache/arrow/blob/master/python/pyarrow/tests/test_io.py#L577],
too.
Cheers,
Dimitri.
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