SynchronizationContext.cs :  » 2.6.4-mono-.net-core » System.Threading » System » Threading » C# / CSharp Open Source

// 
// System.Threading.SynchronizationContext.cs
//
// Author:
//   Lluis Sanchez (lluis@novell.com)
//
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;

namespace System.Threading{
  public class SynchronizationContext
  {
    bool notification_required;

    [ThreadStatic]
    static SynchronizationContext currentContext;
    
    public SynchronizationContext ()
    {
    }

    internal SynchronizationContext (SynchronizationContext context)
    {
      currentContext = context;
    }
    
    public static SynchronizationContext Current
    {
      get {
#if NET_2_1
        if (currentContext == null)
          currentContext = new SynchronizationContext ();
#endif
        return currentContext;
      }
    }

    public virtual SynchronizationContext CreateCopy ()
    {
      return new SynchronizationContext (this);
    }

    public bool IsWaitNotificationRequired ()
    {
      return notification_required;
    }

    public virtual void OperationCompleted ()
    {
    }

    public virtual void OperationStarted ()
    {
    }
    
    public virtual void Post (SendOrPostCallback d, object state)
    {
      ThreadPool.QueueUserWorkItem (new WaitCallback (d), state);
    }
    
    public virtual void Send (SendOrPostCallback d, object state)
    {
      d (state);
    }
    
    public static void SetSynchronizationContext (SynchronizationContext syncContext)
    {
      currentContext = syncContext;
    }

#if NET_2_1
    [Obsolete]
    public static void SetThreadStaticContext (SynchronizationContext syncContext)
    {
      currentContext = syncContext;
    }
#endif

    [MonoTODO]
    protected void SetWaitNotificationRequired ()
    {
      notification_required = true;
      throw new NotImplementedException ();
    }

    [CLSCompliant (false)]
    [PrePrepareMethod ()]
    public virtual int Wait (IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
    {
      return WaitHelper (waitHandles, waitAll, millisecondsTimeout);
    }

    [MonoTODO]
    [CLSCompliant (false)]
    [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
    [PrePrepareMethod ()]
    protected static int WaitHelper (IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
    {
      throw new NotImplementedException ();
    }
  }
}