+/**
+ * @brief Get the available size in bytes of a storage
+ *
+ * @param resource The surf storage
+ * @return The available size in bytes of the storage
+ */
+XBT_PUBLIC(sg_size_t) surf_storage_get_free_size(surf_resource_t resource);
+
+/**
+ * @brief Get the size in bytes of a storage
+ *
+ * @param resource The surf storage
+ * @return The used size in bytes of the storage
+ */
+XBT_PUBLIC(sg_size_t) surf_storage_get_used_size(surf_resource_t resource);
+
+