jvanstraten commented on a change in pull request #12116:
URL: https://github.com/apache/arrow/pull/12116#discussion_r808222620
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File path: cpp/src/arrow/device.h
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@@ -223,4 +236,55 @@ class ARROW_EXPORT CPUMemoryManager : public MemoryManager
{
ARROW_EXPORT
std::shared_ptr<MemoryManager> default_cpu_memory_manager();
+/// A memory manager that uses the immutable zeros interface of the given
memory pool,
+/// rather than the normal mutable buffer interface.
Review comment:
Okay, that's fair... but don't you agree with my point that if a
`Buffer` is associated with some memory manager, it should be possible to
recreate it with that memory manager? Maybe the solution is just to *not*
associate a memory manager with immutable zeros buffers, but doesn't that imply
that the memory it points to is not owned by a memory pool? I'm generally
confused about how to correctly implement this.
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