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#if NET_4_0 || BOOTSTRAP_NET_4_0
//
// CancellationToken.cs
//
// Author:
// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
//
// Copyright (c) 2009 Jérémie "Garuma" Laval
//
// 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;
using System.Threading;
using System.Collections.Generic;
namespace System.Threading
{
public struct CancellationToken
{
public CancellationToken (bool canceled)
{
// dummy, this is actually set by CancellationTokenSource when the token is created
Source = null;
}
public CancellationTokenRegistration Register (Action callback)
{
return Register (callback, false);
}
public CancellationTokenRegistration Register (ICancelableOperation cancelable)
{
return Register (cancelable, false);
}
public CancellationTokenRegistration Register (Action callback, bool useSynchronizationContext)
{
if (callback == null)
throw new ArgumentNullException ("callback");
return Source.Register (callback, useSynchronizationContext);
}
public CancellationTokenRegistration Register (Action<object> callback, object state)
{
return Register (callback, state, false);
}
public CancellationTokenRegistration Register (ICancelableOperation cancelable, bool useSynchronizationContext)
{
if (cancelable == null)
throw new ArgumentNullException ("cancelable");
return Register (() => cancelable.Cancel (), useSynchronizationContext);
}
public CancellationTokenRegistration Register (Action<object> callback, object state, bool useSynchronizationContext)
{
if (callback == null)
throw new ArgumentNullException ("callback");
return Register (() => callback (state), useSynchronizationContext);
}
public bool Equals (CancellationToken other)
{
return this.Source == other.Source;
}
public override bool Equals (object obj)
{
return (obj is CancellationToken) ? Equals ((CancellationToken)obj) : false;
}
public override int GetHashCode ()
{
return Source.GetHashCode ();
}
public static bool operator == (CancellationToken lhs, CancellationToken rhs)
{
return lhs.Equals (rhs);
}
public static bool operator != (CancellationToken lhs, CancellationToken rhs)
{
return !lhs.Equals (rhs);
}
public bool CanBeCanceled {
get {
return true;
}
}
public bool IsCancellationRequested {
get {
return Source.IsCancellationRequested;
}
}
public WaitHandle WaitHandle {
get {
return Source.WaitHandle;
}
}
internal CancellationTokenSource Source {
get;
set;
}
}
}
#endif
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