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

//
// System.Net.WebAsyncResult
//
// Authors:
//  Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003 Ximian, Inc (http://www.ximian.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.IO;
using System.Threading;

namespace System.Net{
  class WebAsyncResult : IAsyncResult
  {
    ManualResetEvent handle;
    bool synch;
    bool isCompleted;
    AsyncCallback cb;
    object state;
    int nbytes;
    IAsyncResult innerAsyncResult;
    bool callbackDone;
    Exception exc;
    HttpWebResponse response;
    Stream writeStream;
    byte [] buffer;
    int offset;
    int size;
    object locker = new object ();
    public bool EndCalled;
    public bool AsyncWriteAll;

    public WebAsyncResult (AsyncCallback cb, object state)
    {
      this.cb = cb;
      this.state = state;
    }

    public WebAsyncResult (HttpWebRequest request, AsyncCallback cb, object state)
    {
      this.cb = cb;
      this.state = state;
    }

    public WebAsyncResult (AsyncCallback cb, object state, byte [] buffer, int offset, int size)
    {
      this.cb = cb;
      this.state = state;
      this.buffer = buffer;
      this.offset = offset;
      this.size = size;
    }

    internal void SetCompleted (bool synch, Exception e)
    {
      this.synch = synch;
      exc = e;
      lock (locker) {
        isCompleted = true;
        if (handle != null)
          handle.Set ();
      }
    }
    
    internal void Reset ()
    {
      callbackDone = false;
      exc = null;
      response = null;
      writeStream = null;
      exc = null;
      lock (locker) {
        isCompleted = false;
        if (handle != null)
          handle.Reset ();
      }
    }

    internal void SetCompleted (bool synch, int nbytes)
    {
      this.synch = synch;
      this.nbytes = nbytes;
      exc = null;
      lock (locker) {
        isCompleted = true;
        if (handle != null)
          handle.Set ();
      }
    }
    
    internal void SetCompleted (bool synch, Stream writeStream)
    {
      this.synch = synch;
      this.writeStream = writeStream;
      exc = null;
      lock (locker) {
        isCompleted = true;
        if (handle != null)
          handle.Set ();
      }
    }
    
    internal void SetCompleted (bool synch, HttpWebResponse response)
    {
      this.synch = synch;
      this.response = response;
      exc = null;
      lock (locker) {
        isCompleted = true;
        if (handle != null)
          handle.Set ();
      }
    }
    
    internal void DoCallback ()
    {
      if (!callbackDone && cb != null) {
        callbackDone = true;
        cb (this);
      }
    }
    
    internal void WaitUntilComplete ()
    {
      if (IsCompleted)
        return;

      AsyncWaitHandle.WaitOne ();
    }

    internal bool WaitUntilComplete (int timeout, bool exitContext)
    {
      if (IsCompleted)
        return true;

      return AsyncWaitHandle.WaitOne (timeout, exitContext);
    }

    public object AsyncState {
      get { return state; }
    }

    public WaitHandle AsyncWaitHandle {
      get {
        lock (locker) {
          if (handle == null)
            handle = new ManualResetEvent (isCompleted);
        }
        
        return handle;
      }
    }

    public bool CompletedSynchronously {
      get { return synch; }
    }

    public bool IsCompleted {
      get {
        lock (locker) {
          return isCompleted;
        }
      }
    }

    internal bool GotException {
      get { return (exc != null); }
    }
    
    internal Exception Exception {
      get { return exc; }
    }
    
    internal int NBytes {
      get { return nbytes; }
      set { nbytes = value; }
    }

    internal IAsyncResult InnerAsyncResult {
      get { return innerAsyncResult; }
      set { innerAsyncResult = value; }
    }

    internal Stream WriteStream {
      get { return writeStream; }
    }

    internal HttpWebResponse Response {
      get { return response; }
    }

    internal byte [] Buffer {
      get { return buffer; }
    }

    internal int Offset {
      get { return offset; }
    }

    internal int Size {
      get { return size; }
    }
  }
}