Copyright (C) 1994, Digital Equipment Corporation
Digital Internal Use Only
All rights reserved.
Last modified on Fri Jul 29 10:20:50 PDT 1994 by najork
Created on Fri Feb 18 10:53:01 PST 1994 by najork
GENERIC INTERFACE CBStack (AnyCB);
IMPORT CB, GO;
TYPE
T <: Public;
Public = OBJECT
METHODS
init () : T;
invokeTop (rec : AnyCB.Rec) RAISES {CB.BadMethod};
push (cb : AnyCB.T);
pop () RAISES {GO.StackError};
remove (cb : AnyCB.T) RAISES {GO.StackError};
END;
Callback Stacks are monitored. push, pop, and remove happen inside
the monitor. invokeTop has two phases: obtaining the top element of the
stack (which happens inside the moditor), and invoking it (which is not
protected by the monitor).
END CBStack.