//------------------------------------------------------------------------
// Filename: 
//    bridge-mon.h
// PROGRAM DESCRIPTION
//    class definition file for BridgeMonitor class
//    
//    MONITOR  bridge, Hoare style:                                               
//    This monitor solves the bridge-crossing problem.  It consists 
//    of the following procedures:                                     
//    (1) BridgeInit()     - initialize bridge                      
//    (2) ArriveBridge()   - called when a vehicle arrives at the   
//                           bridge                                 
//    (3) ExitBridge()     - called when a vehicle exits the bridge 
// ---------------------------------------------------------------- 

#ifndef  _BRIDGE_MON_H
#define  _BRIDGE_MON_H

#include "ThreadClass.h"

//------------------------------------------------------------------------
// BridgeMonitor class definition
//------------------------------------------------------------------------

class BridgeMonitor: public Monitor 
{
     public:
          BridgeMonitor(char* Name);    // constructor  
          int isSafe(int Direction);
          void  ArriveBridge(int Direction);
          void  ExitBridge(int Direction);

     private:
          Condition *WaitingLine[2];    // blocks vehicles
          int  CurrentDirection;        // current direction of cars
          int  VehicleCount;            // # of vehicle on the bridge
          int  Waiting[2];              // # of east/west bound waiting
          char *Names[2];
};

#endif