case TBM_MODULE_TYPE_TBM_BACKEND:
bufmgr_func = module->bufmgr_func;
TBM_RETURN_VAL_SET_ERR_IF_FAIL(bufmgr_func, NULL, *error, TBM_ERROR_INVALID_OPERATION);
case TBM_MODULE_TYPE_TBM_BACKEND:
bufmgr_func = module->bufmgr_func;
TBM_RETURN_VAL_SET_ERR_IF_FAIL(bufmgr_func, NULL, *error, TBM_ERROR_INVALID_OPERATION);