1.133.8 ProcessorScheduler: timed invocation

isTimeoutProgrammed

Private - Answer whether there is a pending call to #signal:atMilliseconds:

signal: aSemaphore atMilliseconds: millis

Private - signal 'aSemaphore' after 'millis' milliseconds have elapsed

signal: aSemaphore onInterrupt: anIntegerSignalNumber

Signal 'aSemaphore' when the given C signal occurs.