is there any implement of CallContext.GetData / SetData in .NET Core?












3














AsyncLocal<> in .NET Core like CallContext.LogicGetData/LogicSetData. How about GetData and SetData?
Thread.GetData/SetData, ThreadStatic, ThreadLocal all of these has same problem, when Thread finish, these value will not clean, and if these Thread reuse(or maybe Thread Id reuse), the LocalValue is already exists.



class Program
{
[ThreadStatic]
private static string Static;
private static ThreadLocal<string> Local = new ThreadLocal<string>(false);
private static LocalDataStoreSlot Slot = Thread.AllocateDataSlot();

static void Main(string args)
{
var threadIds = new List<int>();
for (var i = 0; i < 100; i++)
{
Task.Run(() =>
{
if (threadIds.Contains(Thread.CurrentThread.ManagedThreadId))
{
if(Static == null || Local.Value == null || Thread.GetData(Slot) == null)
{
// never get in
}
else
{
// same thread id always already exists value
}
}
else
{
threadIds.Add(Thread.CurrentThread.ManagedThreadId);
if (Static == null && Local.Value == null && Thread.GetData(Slot) == null)
{
var threadId = Thread.CurrentThread.ManagedThreadId.ToString();
Static = threadId;
Local.Value = threadId;
Thread.SetData(Slot, threadId);
}
else
{
//never get in
}
}
}).Wait();
}

Console.WriteLine("Press any key to continue...");
Console.ReadKey();
}
}


I know how CallContext do, it just copy LogicalCallContext values to child thread and do not copy IllogicalCallContext. But .NET Core only IAsyncLocalValueMap in ExecutionContext, and it always copy to child thread(except SuppressFlow). So, is there any implement of GetData/SetData? or any way to clean ThreadLocal when its finished.










share|improve this question



























    3














    AsyncLocal<> in .NET Core like CallContext.LogicGetData/LogicSetData. How about GetData and SetData?
    Thread.GetData/SetData, ThreadStatic, ThreadLocal all of these has same problem, when Thread finish, these value will not clean, and if these Thread reuse(or maybe Thread Id reuse), the LocalValue is already exists.



    class Program
    {
    [ThreadStatic]
    private static string Static;
    private static ThreadLocal<string> Local = new ThreadLocal<string>(false);
    private static LocalDataStoreSlot Slot = Thread.AllocateDataSlot();

    static void Main(string args)
    {
    var threadIds = new List<int>();
    for (var i = 0; i < 100; i++)
    {
    Task.Run(() =>
    {
    if (threadIds.Contains(Thread.CurrentThread.ManagedThreadId))
    {
    if(Static == null || Local.Value == null || Thread.GetData(Slot) == null)
    {
    // never get in
    }
    else
    {
    // same thread id always already exists value
    }
    }
    else
    {
    threadIds.Add(Thread.CurrentThread.ManagedThreadId);
    if (Static == null && Local.Value == null && Thread.GetData(Slot) == null)
    {
    var threadId = Thread.CurrentThread.ManagedThreadId.ToString();
    Static = threadId;
    Local.Value = threadId;
    Thread.SetData(Slot, threadId);
    }
    else
    {
    //never get in
    }
    }
    }).Wait();
    }

    Console.WriteLine("Press any key to continue...");
    Console.ReadKey();
    }
    }


    I know how CallContext do, it just copy LogicalCallContext values to child thread and do not copy IllogicalCallContext. But .NET Core only IAsyncLocalValueMap in ExecutionContext, and it always copy to child thread(except SuppressFlow). So, is there any implement of GetData/SetData? or any way to clean ThreadLocal when its finished.










    share|improve this question

























      3












      3








      3







      AsyncLocal<> in .NET Core like CallContext.LogicGetData/LogicSetData. How about GetData and SetData?
      Thread.GetData/SetData, ThreadStatic, ThreadLocal all of these has same problem, when Thread finish, these value will not clean, and if these Thread reuse(or maybe Thread Id reuse), the LocalValue is already exists.



      class Program
      {
      [ThreadStatic]
      private static string Static;
      private static ThreadLocal<string> Local = new ThreadLocal<string>(false);
      private static LocalDataStoreSlot Slot = Thread.AllocateDataSlot();

      static void Main(string args)
      {
      var threadIds = new List<int>();
      for (var i = 0; i < 100; i++)
      {
      Task.Run(() =>
      {
      if (threadIds.Contains(Thread.CurrentThread.ManagedThreadId))
      {
      if(Static == null || Local.Value == null || Thread.GetData(Slot) == null)
      {
      // never get in
      }
      else
      {
      // same thread id always already exists value
      }
      }
      else
      {
      threadIds.Add(Thread.CurrentThread.ManagedThreadId);
      if (Static == null && Local.Value == null && Thread.GetData(Slot) == null)
      {
      var threadId = Thread.CurrentThread.ManagedThreadId.ToString();
      Static = threadId;
      Local.Value = threadId;
      Thread.SetData(Slot, threadId);
      }
      else
      {
      //never get in
      }
      }
      }).Wait();
      }

      Console.WriteLine("Press any key to continue...");
      Console.ReadKey();
      }
      }


      I know how CallContext do, it just copy LogicalCallContext values to child thread and do not copy IllogicalCallContext. But .NET Core only IAsyncLocalValueMap in ExecutionContext, and it always copy to child thread(except SuppressFlow). So, is there any implement of GetData/SetData? or any way to clean ThreadLocal when its finished.










      share|improve this question













      AsyncLocal<> in .NET Core like CallContext.LogicGetData/LogicSetData. How about GetData and SetData?
      Thread.GetData/SetData, ThreadStatic, ThreadLocal all of these has same problem, when Thread finish, these value will not clean, and if these Thread reuse(or maybe Thread Id reuse), the LocalValue is already exists.



      class Program
      {
      [ThreadStatic]
      private static string Static;
      private static ThreadLocal<string> Local = new ThreadLocal<string>(false);
      private static LocalDataStoreSlot Slot = Thread.AllocateDataSlot();

      static void Main(string args)
      {
      var threadIds = new List<int>();
      for (var i = 0; i < 100; i++)
      {
      Task.Run(() =>
      {
      if (threadIds.Contains(Thread.CurrentThread.ManagedThreadId))
      {
      if(Static == null || Local.Value == null || Thread.GetData(Slot) == null)
      {
      // never get in
      }
      else
      {
      // same thread id always already exists value
      }
      }
      else
      {
      threadIds.Add(Thread.CurrentThread.ManagedThreadId);
      if (Static == null && Local.Value == null && Thread.GetData(Slot) == null)
      {
      var threadId = Thread.CurrentThread.ManagedThreadId.ToString();
      Static = threadId;
      Local.Value = threadId;
      Thread.SetData(Slot, threadId);
      }
      else
      {
      //never get in
      }
      }
      }).Wait();
      }

      Console.WriteLine("Press any key to continue...");
      Console.ReadKey();
      }
      }


      I know how CallContext do, it just copy LogicalCallContext values to child thread and do not copy IllogicalCallContext. But .NET Core only IAsyncLocalValueMap in ExecutionContext, and it always copy to child thread(except SuppressFlow). So, is there any implement of GetData/SetData? or any way to clean ThreadLocal when its finished.







      c# .net multithreading .net-core






      share|improve this question













      share|improve this question











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      share|improve this question










      asked Nov 21 '18 at 7:14









      Hourglass

      325




      325
























          1 Answer
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          2














          Use a change handler for the AsyncLocal to clear the value when the thread changes?



          private static AsyncLocal<string> AsyncLocal
          = new AsyncLocal<string>(ThreadContextChanged);

          private static void ThreadContextChanged(AsyncLocalValueChangedArgs<string> changedArgs)
          {
          if (changedArgs.ThreadContextChanged &&
          changedArgs.CurrentValue != null)
          {
          AsyncLocal.Value = null;
          }
          }





          share|improve this answer





















          • thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
            – Hourglass
            Nov 23 '18 at 7:26











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          1 Answer
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          active

          oldest

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          active

          oldest

          votes









          2














          Use a change handler for the AsyncLocal to clear the value when the thread changes?



          private static AsyncLocal<string> AsyncLocal
          = new AsyncLocal<string>(ThreadContextChanged);

          private static void ThreadContextChanged(AsyncLocalValueChangedArgs<string> changedArgs)
          {
          if (changedArgs.ThreadContextChanged &&
          changedArgs.CurrentValue != null)
          {
          AsyncLocal.Value = null;
          }
          }





          share|improve this answer





















          • thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
            – Hourglass
            Nov 23 '18 at 7:26
















          2














          Use a change handler for the AsyncLocal to clear the value when the thread changes?



          private static AsyncLocal<string> AsyncLocal
          = new AsyncLocal<string>(ThreadContextChanged);

          private static void ThreadContextChanged(AsyncLocalValueChangedArgs<string> changedArgs)
          {
          if (changedArgs.ThreadContextChanged &&
          changedArgs.CurrentValue != null)
          {
          AsyncLocal.Value = null;
          }
          }





          share|improve this answer





















          • thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
            – Hourglass
            Nov 23 '18 at 7:26














          2












          2








          2






          Use a change handler for the AsyncLocal to clear the value when the thread changes?



          private static AsyncLocal<string> AsyncLocal
          = new AsyncLocal<string>(ThreadContextChanged);

          private static void ThreadContextChanged(AsyncLocalValueChangedArgs<string> changedArgs)
          {
          if (changedArgs.ThreadContextChanged &&
          changedArgs.CurrentValue != null)
          {
          AsyncLocal.Value = null;
          }
          }





          share|improve this answer












          Use a change handler for the AsyncLocal to clear the value when the thread changes?



          private static AsyncLocal<string> AsyncLocal
          = new AsyncLocal<string>(ThreadContextChanged);

          private static void ThreadContextChanged(AsyncLocalValueChangedArgs<string> changedArgs)
          {
          if (changedArgs.ThreadContextChanged &&
          changedArgs.CurrentValue != null)
          {
          AsyncLocal.Value = null;
          }
          }






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 23 '18 at 5:58









          Ben Adams

          2,2101720




          2,2101720












          • thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
            – Hourglass
            Nov 23 '18 at 7:26


















          • thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
            – Hourglass
            Nov 23 '18 at 7:26
















          thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
          – Hourglass
          Nov 23 '18 at 7:26




          thank you so much, its useful. I have seen this parameter before, but the name let me feel its only trigger when value changed.
          – Hourglass
          Nov 23 '18 at 7:26


















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