Multithreaded Programming Guide

Return Values

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

If the following condition occurs, pthread_mutexatt_setprioceiling() fails and returns the corresponding value.


The option _POSIX_THREAD_PRIO_PROTECT is not defined and the implementation does not support the function.

If any of the following conditions occurs, pthread_mutex_setprioceiling() might fail and return the corresponding value.


The priority requested by prioceiling is out of range.


The value specified by mutex does not refer to a currently existing mutex.


The implementation does not support the priority ceiling protocol for mutexes.


The caller does not have the privilege to perform the operation.