jhorstmann commented on a change in pull request #1449:
URL: https://github.com/apache/arrow-rs/pull/1449#discussion_r835740249
##########
File path: arrow/src/ffi.rs
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@@ -781,11 +781,19 @@ impl ArrowArray {
.to_string(),
));
};
- let ffi_array = (*array).clone();
- let ffi_schema = (*schema).clone();
+
+ let array_mut = array as *mut FFI_ArrowArray;
+ let schema_mut = schema as *mut FFI_ArrowSchema;
+
+ let array_data = std::ptr::replace(array_mut, FFI_ArrowArray::empty());
Review comment:
I'm trying to catch up with these discussions since I'll soon have a
need to create Buffers from foreign memory. The cast to `*mut` followed by
`std::ptr::replace` here doesn't look safe to me. When the pointer is coming
from an `Arc` that seems to violate rust's unique ownership rules.
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