events/src/EventNumber.i3

                            -*- Mode: Modula-3 -*- 
 * 
 * For information about this program, contact Blair MacIntyre            
 * (bm@cs.columbia.edu) or Steven Feiner (feiner@cs.columbia.edu)         
 * at the Computer Science Dept., Columbia University,                    
 * 1214 Amsterdam Ave. Mailstop 0401, New York, NY, 10027.                
 *                                                                        
 * Copyright (C) 1995, 1996 by The Trustees of Columbia University in the 
 * City of New York.  Blair MacIntyre, Computer Science Department.       
 * See file COPYRIGHT-COLUMBIA for details.
 * 
 * Author          : Blair MacIntyre
 * Created On      : Tue May 30 23:00:08 1995
 * Last Modified By: Blair MacIntyre
 * Last Modified On: Mon Dec  2 15:36:10 1996
 * Update Count    : 13
 * 
 * $Source: /usr/cvs/cm3/m3-comm/events/src/EventNumber.i3,v $
 * $Date: 2001-12-02 00:20:37 $
 * $Author: wagner $
 * $Revision: 1.2 $
 * 
 * $Log: EventNumber.i3,v $
 * Revision 1.2  2001-12-02 00:20:37  wagner
 * add copyright notes, fix overrides for cm3, and make everything compile
 *
 * added: events/COPYRIGHT-COLUMBIA
 * added: events/src/COPYRIGHT-COLUMBIA
 * modified: events/src/Event.i3
 * modified: events/src/Event.m3
 * modified: events/src/EventConn.i3
 * modified: events/src/EventConn.m3
 * modified: events/src/EventCounter.i3
 * modified: events/src/EventCounter.m3
 * modified: events/src/EventHandle.i3
 * modified: events/src/EventIO.i3
 * modified: events/src/EventNumber.i3
 * modified: events/src/EventNumber.m3
 * modified: events/src/EventNumberF.i3
 * modified: events/src/EventPort.i3
 * modified: events/src/EventPort.m3
 * modified: events/src/EventProtocol.i3
 * modified: events/src/EventRd.i3
 * modified: events/src/EventRd.m3
 * modified: events/src/EventSpaceID.i3
 * modified: events/src/EventSpaceID.m3
 * modified: events/src/EventStubLib.i3
 * modified: events/src/EventStubLib.m3
 * modified: events/src/EventWireRep.i3
 * modified: events/src/EventWireRep.m3
 * modified: events/src/EventWr.i3
 * modified: events/src/EventWr.m3
 * modified: events/src/EventWrF.i3
 * modified: events/src/HostInfo.i3
 * modified: events/src/HostInfo.m3
 * modified: events/src/RdWrMutex.i3
 * modified: events/src/RdWrMutex.m3
 * modified: events/src/Work.i3
 * modified: events/src/WorkerPool.i3
 * modified: events/src/WorkerPool.m3
 * modified: events/src/Zombie.i3
 * modified: events/src/m3makefile
 * modified: events/src/m3overrides
 *
 * Revision 1.1.1.1  2001/12/02 00:06:45  wagner
 * Blair MacIntyre's events library
 *
 * Revision 1.3  1997/01/23 15:26:36  bm
 * Lots of little bug fixes.
 *
 * Revision 1.2  1996/11/21 22:37:11  bm
 * fixed header
 *
 * 
 * HISTORY
 


INTERFACE EventNumber;

IMPORT Text, Fmt;

CONST Brand = "Event Number";

TYPE
  T <: Public;
  Public = OBJECT METHODS
    init(t: T := NIL): T;
    inc() RAISES {Overflow};
    dec() RAISES {Overflow};
    compare(p2: T): [-1..1];
    fmt(base: Fmt.Base := 16): Text.T;
  END;

 If inc overflows the event number, it will raise this exception. 

EXCEPTION Overflow;

PROCEDURE New(t: T := NIL): T;

 Same as NEW(T).init(t) 

PROCEDURE Compare(p1, p2: T): [-1..1];

 Same as p1.compare(p2) 

END EventNumber.