//------------------------------------------------------------------------
// Filename: 
//    bridge-Thrd.cpp
// PROGRAM DESCRIPTION
//    Implementation of vehicle threads
//------------------------------------------------------------------------

#include  <iostream.h>
#include  "ThreadClass.h"
#include  "bridge-Thrd.h"
#include  "bridge-mon.h"

// static data variables

static BridgeMonitor Bridge("Bridge");

// ------------------------------------------------------------------- 
// FUNCTION  Filler():                                              
//    This function fills a char array with spaces.                 
// ------------------------------------------------------------------- 

void  Filler(char x[], int n)
{
     int  i;

     for (i = 0; i < n*2; i++)
          x[i] = ' ';
     x[i] = '\0';
}

//------------------------------------------------------------------------
// Vehicle::Vehicle()
//      constructor for Vehicle class
//------------------------------------------------------------------------

Vehicle::Vehicle(int id, int max_run)
{
     ID = id;
     Max_Run = max_run;
     ThreadName.seekp(0, ios::beg);
     ThreadName << "Vehicle" << id << '\0';
}

// ------------------------------------------------------------------- 
// Vehicle::ThreadFunc()                                        
//    This function simulates a vehicle crossing the bridge.         
// ------------------------------------------------------------------- 

void Vehicle::ThreadFunc()
{
     Thread::ThreadFunc();
     int     Direction;
     char    *Dir[2] = { "<--", "-->" };
     char    space[200];
     int     i;

     Filler(space, ID);
     cout << space << ThreadName.str() << " started ..." << endl;
     for (i = 1; i <= Max_Run; i++) {        // for each crossing   
          Delay();                           // rest for a while         
          Direction = rand() % 2;            // a random direction    
          cout << space << ThreadName.str() 
               << "(" << i << ") arrives at the bridge in direction " 
               << Dir[Direction] << endl;
          Bridge.ArriveBridge(Direction);    // arrive at the bridge 
          cout << space << ThreadName.str() 
               << "(" << i << ") crosses the bridge" << endl;
          Delay();                           // crossing the bridge
          Bridge.ExitBridge(Direction);      // exit the bridge 
          cout << space << ThreadName.str() 
               << "(" << i << ") is done" << endl;
     }
     cout << space << ThreadName.str() << " is gone forever ..." 
          << endl;
     Exit();
}

// end of bridge-Thrd.cpp