int aws_iotdevice_defender_config_register_number_metric()

in source/device_defender.c [1232:1264]

• 30 lines of code
• 3 McCabe index (conditional complexity)

int aws_iotdevice_defender_config_register_number_metric(
    struct aws_iotdevice_defender_task_config *task_config,
    const struct aws_byte_cursor *metric_name,
    aws_iotdevice_defender_get_number_fn *supplier,
    void *userdata) {
    AWS_PRECONDITION(task_config != NULL);
    AWS_PRECONDITION(metric_name != NULL);
    AWS_PRECONDITION(supplier != NULL);

    struct aws_allocator *allocator = task_config->allocator;
    struct defender_custom_metric *custom_metric = aws_mem_calloc(allocator, 1, sizeof(struct defender_custom_metric));
    if (custom_metric) {
        custom_metric->type = DD_METRIC_NUMBER;
        custom_metric->metric_name = aws_string_new_from_cursor(allocator, metric_name);
        custom_metric->supplier_fn.get_number_fn = supplier;
        custom_metric->metric_cb_userdata = userdata;

        if (AWS_OP_SUCCESS != aws_array_list_push_back(&task_config->custom_metrics, &custom_metric)) {
            AWS_LOGF_ERROR(
                AWS_LS_IOTDEVICE_DEFENDER_TASK,
                "id=%p: Failed to add number custom metric " PRInSTR,
                (void *)task_config,
                AWS_BYTE_CURSOR_PRI(*metric_name)); /* wrong subject */
            aws_string_destroy(custom_metric->metric_name);
            aws_mem_release(allocator, custom_metric);
            return AWS_OP_ERR;
        }

        task_config->custom_metrics_len++;
        return AWS_OP_SUCCESS;
    }
    return AWS_OP_ERR;
}