Multithreaded Programming Guide

Return Values

On successful completion, pthread_mutexattr_getrobust_np() returns 0. Any other returned value indicates that an error occurred.

If any of the following conditions occurs, pthread_mutexattr_getrobust_np() fails and returns the corresponding value.


The option _POSIX_THREAD_PRIO__INHERIT is not defined or the implementation does not support pthread_mutexattr_getrobust_np().


The value specified by robustness is not supported.

pthread_mutexattr_getrobust_np() might fail if:


The value specified by attr or robustness is invalid.