+rrd_add_ptr
+rrd_add_strdup
rrd_clear_error
rrd_close
rrd_cmd_flush
rrd_clear_error
rrd_close
rrd_cmd_flush
rrd_first_r
rrd_free
rrd_free_context
rrd_first_r
rrd_free
rrd_free_context
rrd_freemem
rrd_get_context
rrd_get_error
rrd_freemem
rrd_get_context
rrd_get_error