Return Values

pthread_mutex_consistent_np() returns zero after completing successfully. Any other return value indicates that an error occurred. When any of the following conditions occurs, the function fails and returns the corresponding value.

pthread_mutex_consistent_np() fails if:

ENOSYS

The option _POSIX_THREAD_PRIO_INHERIT is not defined or the implementation does not support pthread_mutex_consistent_np().

pthread_mutex_consistent_np() might fail if:

EINVAL

The value specified by mutex is invalid.