mongoc_apm_topology_changed_get_previous_description()#

Synopsis#

const mongoc_topology_description_t *
mongoc_apm_topology_changed_get_previous_description (
   const mongoc_apm_topology_changed_t *event);

Returns this event’s previous description. The data is only valid in the scope of the callback that receives this event; copy it if it will be accessed after the callback returns.

Parameters#

event: A mongoc_apm_topology_changed_t.

Returns#

A mongoc_topology_description_t that should not be modified or freed.