1(* Signal -- Standard ML Basis Library *) 2 3type signal = int 4 5val hup = 1 6val int = 2 7val quit = 3 8val ill = 4 9val abrt = 6 10val bus = 7 11val fpe = 8 12val kill = 9 13val usr1 = 10 14val segv = 11 15val usr2 = 12 16val pipe = 13 17val alrm = 14 18val term = 15 19val chld = 17 20val cont = 18 21val stop = 19 22val tstp = 20 23val ttin = 21 24val ttou = 22 25 26val toWord = Word.fromInt 27val fromWord = Word.toInt 28