/// <summary>
/// 使用C#的lock关键字
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Console.WriteLine("Incorrect counter");
var c = new Counter();
var t1 = new Thread(() => TestCounter(c));
var t2 = new Thread(() => TestCounter(c));
var t3 = new Thread(() => TestCounter(c));
t1.Start();
t2.Start();
t3.Start();
t1.Join();
t2.Join();
t3.Join();
// 多个线程中存在竞争条件（race condition）
// 由于++并不是一个线程安全的操作，所以输出结果一般都不为0
Console.WriteLine($"Total count: {c.Count}");
Console.WriteLine("----------------------------------------");
Console.WriteLine("Correct counter");
var c1 = new CounterWithLock();
t1 = new Thread(() => TestCounter(c1));
t2 = new Thread(() => TestCounter(c1));
t3 = new Thread(() => TestCounter(c1));
t1.Start();
t2.Start();
t3.Start();
t1.Join();
t2.Join();
t3.Join();
Console.WriteLine($"Total count: {c1.Count}");
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("Incorrect counter");
var c = new Counter();
var t1 = new Thread(() => TestCount(c));
var t2 = new Thread(() => TestCount(c));
var t3 = new Thread(() => TestCount(c));
t1.Start();
t2.Start();
t3.Start();
t1.Join();
t2.Join();
t3.Join();
Console.WriteLine($"Total count: {c.Count}");
Console.WriteLine("-----------------------");
Console.WriteLine("Correct counter");
var c1 = new CounterWithLock();
t1 = new Thread(() => TestCount(c1));
t2 = new Thread(() => TestCount(c1));
t3 = new Thread(() => TestCount(c1));
t1.Start();
t2.Start();
t3.Start();
t1.Join();
t2.Join();
t3.Join();
Console.WriteLine($"Total count: {c1.Count}");
}