C#中线程安全的单例模式

using UnityEngine;

/*by Alexander*/

public enum UserState
{
    Online,
    Chatting,
    Pushing,
    Offline
}

public class StateController : MonoBehaviour
{
    private object m_mutex = new object();
    private bool m_initialized = false;
    private static StateController stateController = null;

    // Singleton in thread-safe-mode
    public StateController Instance
    {
        get
        {
            if (!this.m_initialized)
            {
                lock (this.m_mutex)
                {

                    if (stateController == null)
                    {
                        stateController = new StateController();
                        m_initialized = true;
                    }
                }
            }
            return stateController;
        }
    }

    private UserState m_state;
    public UserState State
    {
        get
        {
            return m_state;
        }
        set
        {
            lock (m_mutex)
            {
                m_state = value;
            }
        }
    }
}

作者：艾孜尔江