The pthread_barrierattr_init( ) function shall initialize a barrier attributes object attr with the default value for all of the attributes defined by the implementation. After a barrier attributes object has been used to initialize one or more barriers, any function affecting the attributes object (including destruction) shall not affect any previously initialized barrier. If successful, it shall return zero; otherwise, an error number shall be returned to indicate the error. The pthread_barrierattr_init( ) function shall fail if: [ENOMEM] Insufficient memory exists to initialize the barrier attributes object. This function shall not return an error code of [EINTR].