Make ArrowArrayPtr a shared_ptr instead of a unique_ptr

Author: sgilmore10

matlab/src/cpp/arrow/matlab/c/proxy/array.cc

@@ -26,7 +26,15 @@
 
 namespace arrow::matlab::c::proxy {
 
-  Array::Array() : arrowArray{std::make_unique<ArrowArrayPtr>()} {}
+  struct ArrowArrayDeleter {
+    void operator()(ArrowArray* array) const {
+      if (array) {
+        free(array);
+      }
+    }
+  };
+
+  Array::Array() : arrowArray{std::shared_ptr<ArrowArrayPtr>(new ArrowArray(), ArrowArrayDeleter())} {}
 
   Array::~Array() {
     if (arrowArray && arrowArray->released != nullptr) {

matlab/src/cpp/arrow/matlab/c/proxy/array.h

@@ -23,15 +23,7 @@
 
 namespace arrow::matlab::c::proxy {
 
-  struct ArrowArrayDeleter {
-    void operator()(ArrowArray* array) const {
-      if (array) {
-        free(array);
-      }
-    }
-  };
-
-  using ArrowArrayPtr = std::unique_ptr<ArrowArray, arrow::matlab::c::proxy::ArrowArrayDeleter>;
+  using ArrowArrayPtr = std::shared_ptr<ArrowArray>;
 
 
   class Array : public libmexclass::proxy::Proxy {