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

//
// System.IO/StreamAsyncResult.cs
//
// Authors:
//   Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (c) 2004 Novell, Inc. (http://www.novell.com)
//

//
// Copyright (C) 2004 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.Threading;

namespace System.IO{
  class StreamAsyncResult : IAsyncResult {
    object state;
    bool completed;
    bool done;
    Exception exc;
    int nbytes = -1;
    ManualResetEvent wh;

    public StreamAsyncResult (object state)
    {
      this.state = state;
    }

    public void SetComplete (Exception e)
    {
      exc = e;
      completed = true;
      lock (this) {
        if (wh != null)
          wh.Set ();
      }
    }
    
    public void SetComplete (Exception e, int nbytes)
    {
      this.nbytes = nbytes;
      SetComplete (e);
    }

    public object AsyncState {
      get { return state; }
    }

    public WaitHandle AsyncWaitHandle {
      get {
        lock (this) {
          if (wh == null)
            wh = new ManualResetEvent (completed);

          return wh;
        }
      }
    }

    public virtual bool CompletedSynchronously {
      get { return true; }
    }

    public bool IsCompleted {
      get { return completed; }
    }

    public Exception Exception {
      get { return exc; }
    }

    public int NBytes {
      get { return nbytes; }
    }

    public bool Done {
      get { return done; }
      set { done = value; }
    }
  }
}