thr_setprio Return Values

thr_setprio() returns 0 if successful. When any of the following conditions is detected, thr_setprio() fails and returns the corresponding value.

ESRCH

Description:

The value specified by tid does not refer to an existing thread.

EINVAL

Description:

The value of priority is invalid for the scheduling policy of the specified thread.

EPERM

Description:

The caller does not have the appropriate permission to set the priority to the value specified.