static void Main(string[] args)
{
Singleton s1 = Singleton.Instance;
Singleton s2 = Singleton.Instance;
Console.WriteLine("s1: " + s1.GetHashCode() + ", s2: " + s2.GetHashCode());
s1.doSomething();
s2.doSomething();
Console.WriteLine("\n\nTesting Singleton Pattern use multiple threading.");
Task.Run(() =>
{
System.Threading.Thread.Sleep(5000);
SingletonThreadSafe s12 = SingletonThreadSafe.Instance;
Console.WriteLine($"first: {s12.GetHashCode()}");
s12.doSomething();
});
Task.Run(() =>
{
System.Threading.Thread.Sleep(5000);
SingletonThreadSafe s22 = SingletonThreadSafe.Instance;
Console.WriteLine($"second: {s22.GetHashCode()}");
s22.doSomething();
});
Console.ReadLine();
}
public static SingletonThreadSafe GetInstance(string value)
{
if (_instance == null)
{
// Use a lock to prevent multiple threads from creating instances
lock (_lock)
{
if (_instance == null)
{
_instance = new SingletonThreadSafe();
_instance.Value = value;
}
}
}
return(_instance);
}
static void Main(string[] args)
{
//SingletonExample se = SingletonExample.Instance;
//se.InstanceCheck();
//SingletonExample se1 = SingletonExample.Instance;
//se1.InstanceCheck();
//se.InstanceCheck();
SingletonThreadSafe stf = SingletonThreadSafe.Instance;
stf.InstanceCheck();
stf.InstanceCheck();
SingletonThreadSafe stf1 = SingletonThreadSafe.Instance;
stf1.InstanceCheck();
stf.InstanceCheck();
}
public static void TestThreadSafeSingleton(string value)
{
var singleton = SingletonThreadSafe.GetInstance(value);
Console.WriteLine(singleton.Value);
}