pol_sem
ipol_sem
ER pol_sem (ID semid);ER isem_sem (ID semid);This service call acquires a resource from the semaphore specified by parameter semid (subtracts 0x1 from the semaphore counter).
If a resource could not be acquired from the target semaphore (semaphore counter is set to 0x0) when this service call is issued, the counter manipulation processing is not performed but "E_TMOUT" is returned.