The function int pthread_attr_init(pthread_attr_t *attr) initializes a thread attributes object 'attr' with the default value for all the individual attributes accorinding to a given implementation. NOTE: Since most default values are implementation specific, only the attribute of the detachstate will be tested since the default value is defined in the spec. (default value: PTHREAD_CREATE_JOINABLE) The resulting attributes object (that can also be modified by setting individual attribute values) when used by pthread_create() defines the attributes of the thread created. A single attributes object can be used in multiple simultaneous calls to pthread_create(). NOTE: Undefined results occur if pthread_attr_init() is called specifying an already initialized 'attr' attributes object. If success, pthread_attr_init() returns 0. If it fails, an error number will be returned to indicate the error: [ENOMEM] - Not enough memory to initialize the thread attributes object. It will not return [EINTR]. NOTE: WON'T test here since it is more of a stress test, not a conformance test.