Task exception: Refer status

① Difference between sns_tex and ref_tex

sns_tex() returns only the disable state of task exception handler. But, ref_tex() returns the enable/status of task exception and pending exception pattern.

② uITRON implementation of sns_tex

BOOL sns_tex()
{
        /* if there is not running task, return TRUE */
        if (task running is just idle task)
                return TRUE;
        Otherwise, take the TCB of whoever executing this task
        Enter critical section
        If exception handler is not defined at all
                Exit critical section and return TRUE;
        If exception is disabled
                Exit critical section and return TRUE;
        otherwise
                Exit critical section and return FALSE;
}
③ uITRON implementation of ref_tex

ER ref_tex(ID tskid, T_RTEX *pk_rtex)
{
        Sanity check on arguments
        Enter critical section
        If the task is in the dormant state or task exception handling
        routine is not defined
                Exit critical section and return E_OBJ
        Assign the texstat field with the exception enable/disable status
        Assign the pndptn field with exception pending pattern
        Exit critical section and return E_OK
}
Exception handler a dog in my house..