[ARROW-19] C++: Externalize memory allocations and add a MemoryPool abstract interface to builder classes

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.1.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/15356
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 02/Mar/16 18:52
• Updated: 11/Jan/23 07:06
• Resolved: 03/Mar/16 22:02

Description

Currently memory allocations in the C++ implementation are all internal / self-contained, but in practice the array builders will need to integrate with some other memory allocator / tracker.

I'll define a basic abstract memory pool interface and add an example default implementation (with a resizable arrow::Buffer subclass that requests memory from the pool) with all memory managed internally.