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namespace System.Web.Mvc.Async {
using System;
using System.Threading;
internal sealed class SimpleAsyncResult : IAsyncResult {
private readonly object _asyncState;
private bool _completedSynchronously;
private volatile bool _isCompleted;
public SimpleAsyncResult(object asyncState) {
_asyncState = asyncState;
}
public object AsyncState {
get {
return _asyncState;
}
}
// ASP.NET IAsyncResult objects should never expose a WaitHandle due to potential deadlocking
public WaitHandle AsyncWaitHandle {
get {
return null;
}
}
public bool CompletedSynchronously {
get {
return _completedSynchronously;
}
}
public bool IsCompleted {
get {
return _isCompleted;
}
}
// Proper order of execution:
// 1. Set the CompletedSynchronously property to the correct value
// 2. Set the IsCompleted flag
// 3. Execute the callback
// 4. Signal the WaitHandle (which we don't have)
public void MarkCompleted(bool completedSynchronously, AsyncCallback callback) {
_completedSynchronously = completedSynchronously;
_isCompleted = true;
if (callback != null) {
callback(this);
}
}
}
}
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