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//
// System.Net.DnsAsyncResult
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo.mono@gmail.com)
//
// Copyright (c) 2011 Gonzalo Paniagua Javier
//
//
// 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;
using Mono.Net.Dns;
namespace System.Net
{
class DnsAsyncResult : IAsyncResult
{
static WaitCallback internal_cb = new WaitCallback (CB);
ManualResetEvent handle;
bool synch;
bool is_completed;
AsyncCallback callback;
object state;
IPHostEntry entry;
Exception exc;
public DnsAsyncResult (AsyncCallback cb, object state)
{
this.callback = cb;
this.state = state;
}
public void SetCompleted (bool synch, IPHostEntry entry, Exception e)
{
this.synch = synch;
this.entry = entry;
exc = e;
lock (this) {
if (is_completed)
return;
is_completed = true;
if (handle != null)
handle.Set ();
}
if (callback != null)
ThreadPool.QueueUserWorkItem (internal_cb, this);
}
public void SetCompleted (bool synch, Exception e)
{
SetCompleted (synch, null, e);
}
public void SetCompleted (bool synch, IPHostEntry entry)
{
SetCompleted (synch, entry, null);
}
static void CB (object _this)
{
DnsAsyncResult ares = (DnsAsyncResult) _this;
ares.callback (ares);
}
public object AsyncState {
get { return state; }
}
public WaitHandle AsyncWaitHandle {
get {
lock (this) {
if (handle == null)
handle = new ManualResetEvent (is_completed);
}
return handle;
}
}
public Exception Exception {
get { return exc; }
}
public IPHostEntry HostEntry {
get { return entry; }
}
public bool CompletedSynchronously {
get { return synch; }
}
public bool IsCompleted {
get {
lock (this) {
return is_completed;
}
}
}
}
}
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