static void Main(string[] args)
{
//initalize philosophers
Philosophers philo = new Philosophers();
//Declare all philosophis as threads
Thread p0 = new Thread(philo.PhilosophMethod);
Thread p1 = new Thread(philo.PhilosophMethod);
Thread p2 = new Thread(philo.PhilosophMethod);
Thread p3 = new Thread(philo.PhilosophMethod);
Thread p4 = new Thread(philo.PhilosophMethod);
p0.Start(0);
p1.Start(1);
p2.Start(2);
p3.Start(3);
p4.Start(4);
Console.ReadLine();
}
public void NextState(Philosophers p)
{
Thread.Sleep(1000);
//随机到的数字小于0.5
if (_next.NextDouble() < 0.5)
{
lock (Locker)
{
//放下叉子,如果之前的状态是吃饭
//如果之前的状态也是思考，就不需要放下叉子
if (p.CurrentState == State.Eat)
{
_folks[p.Index] = 0;
if (p.Index != 4)
{
_folks[p.Index + 1] = 0;
}
else
{
_folks[0] = 0;
}
}
//开始思考
p.CurrentState = State.Think;
Console.WriteLine("{0}开始思考。当前叉子状态: {1}", p.Name, string.Join(",", _folks));
}
}
else
{
//正在吃就接着吃
if (p.CurrentState == State.Eat || NumOfFood == 0)
{
return;
}
//尝试开吃
lock (Locker)
{
//左边的叉子
var folkLeft = p.Index;
//右边的叉子
var folkRight = p.Index == 4 ? 0 : p.Index + 1;
//只有左右两边的叉子都没人用才可以开吃
if (_folks[folkLeft] == 0 && _folks[folkRight] == 0)
{
p.CurrentState = State.Eat;
_folks[folkLeft] = 1;
_folks[folkRight] = 1;
NumOfFood--;
Console.WriteLine("{0}开始吃饭，并拿起叉子{1}和{2}。食物总量: {3}, 当前叉子状态: {4}", p.Name, folkLeft, folkRight,
NumOfFood, string.Join(",", _folks));
}
else
{
Console.WriteLine("{0}无法开始吃饭，因为他需要拿起叉子{1}和{2}。当前叉子状态: {3}", p.Name, folkLeft, folkRight,
string.Join(",", _folks));
}
}
}
}
