jorisvandenbossche commented on code in PR #43590:
URL: https://github.com/apache/arrow/pull/43590#discussion_r1775334692
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python/pyarrow/io.pxi:
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@@ -1446,6 +1446,41 @@ cdef class Buffer(_Weakrefable):
"""
return _wrap_device_allocation_type(self.buffer.get().device_type())
+ def copy(self, destination):
+ """
+ Copy the buffer to the destination device.
+
+ The buffer contents will be copied into a new buffer allocated onto
+ the destination MemoryManager or Device. It will return the new Buffer.
+ This function supports cross-device copies.
+
+ Parameters
+ ----------
+ destination : pyarrow.MemoryManager or pyarrow.Device
Review Comment:
We don't have a way to map a given MemoryPool to a device manager (AFAIK),
so in that case you mean to use a different API under the hood to copy to the
memory pool? (`Buffer::CopySlice` seems to allow that, or first explicitly
allocate a new Buffer of the correct size using the memory pool and then
copying the data to it?)
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