pthread_attr_setschedpolicy Return Values

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

EINVAL

Description:

An attempt was made to set tattr to a value that is not valid.

ENOTSUP

Description:

An attempt was made to set the attribute to an unsupported value.