[ARROW-1470] [C++] Add BufferAllocator abstract interface

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.17.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/17490
• Assignee: Unassigned
• Reporter: Wes McKinney
• Created: 06/Sep/17 12:49
• Updated: 11/Jan/23 07:14
• Resolved: 18/Feb/20 18:16

Description

There are some situations (arrow::ipc::SerializeRecordBatch where we pass a MemoryPool* solely to call AllocateBuffer using it. This is not as flexible as it could be, since there are situation where we may wish to allocate from shared memory instead.

So instead:

Func(..., BufferAllocator* allocator, ...) {
  ...
  std::shared_ptr<Buffer> buffer;
  RETURN_NOT_OK(allocator->Allocate(nbytes, &buffer));
  ...
}

Issue Links

• is superceded by: ARROW-2447 [C++] Create a device abstraction