[jira] [Updated] (ARROW-1470) [C++] Add BufferAllocator abstract interface

["Wes McKinney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-1470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated ARROW-1470:
--------------------------------
    Fix Version/s:     (was: 0.13.0)
                   0.14.0

> [C++] Add BufferAllocator abstract interface
> --------------------------------------------
>
>                 Key: ARROW-1470
>                 URL: https://issues.apache.org/jira/browse/ARROW-1470
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
>            Priority: Major
>             Fix For: 0.14.0
>
>
> 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:
> {code}
> Func(..., BufferAllocator* allocator, ...) {
>   ...
>   std::shared_ptr<Buffer> buffer;
>   RETURN_NOT_OK(allocator->Allocate(nbytes, &buffer));
>   ...
> }
> {code}



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