Add API to import from Box

arrow/src/array/array.rs

@@ -620,6 +620,19 @@ fn new_null_sized_array<T: ArrowPrimitiveType>(
     })
 }
 
+/// Creates a new array from two FFI pointers. Used to import arrays from the C Data Interface
+/// # Safety
+/// Assumes that these pointers represent valid C Data Interfaces, both in memory
+/// representation and lifetime via the `release` mechanism.
+pub unsafe fn make_array_from_box(
+    array: *const ffi::FFI_ArrowArray,
+    schema: *const ffi::FFI_ArrowSchema,
+) -> Result<ArrayRef> {
+    let array = Arc::into_raw(Arc::from(Box::from_raw(array as *mut _)));
+    let schema = Arc::into_raw(Arc::from(Box::from_raw(schema as *mut _)));
+    make_array_from_raw(array, schema)
+}
+
 /// Creates a new array from two FFI pointers. Used to import arrays from the C Data Interface
 /// # Safety
 /// Assumes that these pointers represent valid C Data Interfaces, both in memory

arrow/src/ffi.rs

@@ -107,7 +107,7 @@ bitflags! {
 /// See <https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions>
 /// This was created by bindgen
 #[repr(C)]
-#[derive(Debug, Clone)]
+#[derive(Debug)]
 pub struct FFI_ArrowSchema {
     format: *const c_char,
     name: *const c_char,
@@ -336,7 +336,7 @@ fn bit_width(data_type: &DataType, i: usize) -> Result<usize> {
 /// See <https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions>
 /// This was created by bindgen
 #[repr(C)]
-#[derive(Debug, Clone)]
+#[derive(Debug)]
 pub struct FFI_ArrowArray {
     pub(crate) length: i64,
     pub(crate) null_count: i64,
@@ -781,11 +781,9 @@ impl ArrowArray {
                     .to_string(),
             ));
         };
-        let ffi_array = (*array).clone();
-        let ffi_schema = (*schema).clone();
         Ok(Self {
-            array: Arc::new(ffi_array),
-            schema: Arc::new(ffi_schema),
+            array: Arc::from_raw(array as *mut FFI_ArrowArray),
+            schema: Arc::from_raw(schema as *mut FFI_ArrowSchema),
         })
     }