SyncSignal

项目组其他成员写的code，即将被删掉，贴在这儿纪念一下使用AutosetEvent来进行同步的方法。

SyncSignalCollection.cs

public class SessionSyncSignalCollection
  {
    private SynchronisedDictionary<string, SessionSyncSignal> innerDict;
    private readonly object syncRoot = new object();

    public SessionSyncSignalCollection()
    {
      this.innerDict = new SynchronisedDictionary<string, SessionSyncSignal>();
    }

    public void AddSignal(string egmId, string cardId)
    {
      lock (syncRoot)
      {
        SessionSyncSignal signal = FindSignal(egmId, cardId);

        if (signal == null)
        {
          signal = new SessionSyncSignal();
          innerDict.Add(SessionStateHelper.GetHashKey(egmId, cardId), signal);
        }
        else
        {
          signal.Add();
        }
      }
    }

    public bool TryDelSignal(string egmId, string cardId)
    {
      lock (syncRoot)
      {
        SessionSyncSignal signal = FindSignal(egmId, cardId);

        if (signal != null)
        {
          signal = new SessionSyncSignal();
          innerDict.Remove(SessionStateHelper.GetHashKey(egmId, cardId));
          return true;
        }
      }

      return false;
    }

    public bool TrySetSignal(string egmId, string cardId)
    {
      lock (syncRoot)
      {
        SessionSyncSignal signal = FindSignal(egmId, cardId);
        if (signal != null)
        {
          signal.Set();
          return true;
        }
      }

      return false;
    }

    public bool WaitSignal(string egmId, string cardId)
    {
      bool isSucessful = false;
      SessionSyncSignal signal;
      lock (syncRoot)
      {
        signal = FindSignal(egmId, cardId);
      }

      if (signal != null)
      {
        isSucessful = signal.Wait();

        lock (syncRoot)
        {
          if (signal.CanCleared)
          {
            innerDict.Remove(SessionStateHelper.GetHashKey(egmId, cardId));
          }
        }
      }

      return isSucessful;
    }

    private SessionSyncSignal FindSignal(string egmId, string cardId)
    {
      string key = SessionStateHelper.GetHashKey(egmId, cardId);

      SessionSyncSignal signal = null;
      innerDict.TryGetValue(key, out signal);
      return signal;
    }
  }

SyncSignal.cs

public class SessionSyncSignal
  {
    // the counter for cardIn events
    private int eventCounter;
    // the counter for PlayerSessionStart events
    private int signalCounter;

    private AutoResetEvent syncEvent { get; set;}
    private const int waitMilliseconds = 30000;

    public bool CanCleared
    {
      get
      {
        return eventCounter == 0;
      }
    }

    public SessionSyncSignal()
    {
      syncEvent = new AutoResetEvent(false);
      signalCounter = 0;
      eventCounter = 1;
    }

    public void Add()
    {
      eventCounter++;
    }

    public void Set()
    {
      if (signalCounter < 0)
      {
        syncEvent.Set();
      }

      signalCounter++;
    }

    public bool Wait()
    {
      signalCounter--;
      eventCounter--;

      bool isSignalGot = true;
      if (signalCounter < 0)
      {
        isSignalGot = syncEvent.WaitOne(waitMilliseconds);
      }

      return isSignalGot;
    }
  }