// The behaviour of the first philosopher.
public static void Phil1(Object x)
{
Philosophers phil = (Philosophers)x;
Object thisLock = new Object();
while (true)
{
// Wait until the right-hand side fork is available.
while (phil.Forks[4])
{
;
}
// Take the fork.
lock (thisLock)
{
phil.Forks[4] = true;
}
// Wait until the left-hand side fork is available.
while (phil.Forks[0])
{
;
}
lock (thisLock)
{
phil.Forks[0] = true;
}
// Showing the eateng process with assigning a green color to the indicator.
lock (gr1)
gr1.FillEllipse(Brushes.Green, phil.phil1.X, phil.phil1.Y, 50, 50);
// Duration of eating process.
Thread.Sleep(2000);
// Leaving forks.
lock (thisLock)
{
phil.Forks[4] = false;
phil.Forks[0] = false;
}
// Showing the thinking process with assigning a yellow color to the indicator.
lock (gr1)
gr1.FillEllipse(Brushes.Yellow, phil.phil1.X, phil.phil1.Y, 50, 50);
// Duration of thinking process.
Thread.Sleep(2000);
// The philosopher is ready to wait for his turn again. Setting a red color to the indicator.
lock (gr1)
gr1.FillEllipse(Brushes.Red, phil.phil1.X, phil.phil1.Y, 50, 50);
}
}
public static void Phil5(Object x)
{
Philosophers phil = (Philosophers)x;
Object thisLock = new Object();
while (true)
{
while (phil.Forks[3])
{
;
}
lock (thisLock)
{
phil.Forks[3] = true;
}
while (phil.Forks[4])
{
;
}
lock (thisLock)
{
phil.Forks[4] = true;
}
lock (gr1)
gr1.FillEllipse(Brushes.Green, phil.phil5.X, phil.phil5.Y, 50, 50);
Thread.Sleep(2000);
lock (thisLock)
{
phil.Forks[3] = false;
}
lock (thisLock)
{
phil.Forks[4] = false;
}
lock (gr1)
gr1.FillEllipse(Brushes.Yellow, phil.phil5.X, phil.phil5.Y, 50, 50);
Thread.Sleep(2000);
lock (gr1)
gr1.FillEllipse(Brushes.Red, phil.phil5.X, phil.phil5.Y, 50, 50);
}
}
// Start dining.
private void button1_Click(object sender, EventArgs e)
{
gr1 = pictureBox1.CreateGraphics();
CreateTable();
Philosophers phils = new Philosophers();
ph1 = new Thread(Phil1);
ph2 = new Thread(Phil2);
ph3 = new Thread(Phil3);
ph4 = new Thread(Phil4);
ph5 = new Thread(Phil5);
ph1.Start(phils);
ph2.Start(phils);
ph3.Start(phils);
ph4.Start(phils);
ph5.Start(phils);
}
