SYNOPSIS

          mongoc_server_description_t *
          mongoc_client_select_server (mongoc_client_t *client,
                                       bool for_writes,
                                       const mongoc_read_prefs_t *prefs,
                                       bson_error_t *error);

       Choose a server for an operation, according to the logic described in the Server Selection Spec.

       Use  this function only for building a language driver that wraps the C Driver. When writing applications
       in C, higher-level functions automatically select a suitable server.

PARAMETERS

       • client: A mongoc_client_t <>.

       • for_writes: Whether to choose a server suitable for writes or reads.

       • prefs: An optional mongoc_read_prefs_t <>. If for_writes is true, prefs must be  NULL.  Otherwise,  use
         prefs to customize server selection, or pass NULL to use read preference PRIMARY.

       • error: An optional location for a bson_error_t <> or NULL.

RETURNS

       A  mongoc_server_description_t  <>  that must be freed with mongoc_server_description_destroy() <>. If no
       suitable server is found, returns NULL and error is filled out.

Author

       MongoDB, Inc

Copyright

       2009-present, MongoDB, Inc.

2.2.1                                             Dec 11, 2025                    MONGOC_CLIENT_SELECT_SERVER(3)