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//
// System.Threading.Overlapped.cs
//
// Authors:
// Dick Porter (dick@ximian.com)
// Gonzalo Paniagua Javier (gonzalo@ximian.com);
//
// (C) Ximian, Inc. http://www.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.Runtime.InteropServices;
using System.Security.Permissions;
namespace System.Threading
{
public class Overlapped
{
IAsyncResult ares;
int offsetL;
int offsetH;
int evt;
public Overlapped ()
{
}
public Overlapped(int offsetLo, int offsetHi, int hEvent, IAsyncResult ar)
{
offsetL = offsetLo;
offsetH = offsetHi;
evt = hEvent;
ares = ar;
}
[CLSCompliant(false)]
unsafe public static void Free (NativeOverlapped *nativeOverlappedPtr)
{
if ((IntPtr) nativeOverlappedPtr == IntPtr.Zero)
throw new ArgumentNullException ("nativeOverlappedPtr");
Marshal.FreeHGlobal ((IntPtr) nativeOverlappedPtr);
}
[CLSCompliant(false)]
unsafe public static Overlapped Unpack (NativeOverlapped *nativeOverlappedPtr)
{
if ((IntPtr) nativeOverlappedPtr == IntPtr.Zero)
throw new ArgumentNullException ("nativeOverlappedPtr");
Overlapped result = new Overlapped ();
result.offsetL = nativeOverlappedPtr->OffsetLow;
result.offsetH = nativeOverlappedPtr->OffsetHigh;
result.evt = nativeOverlappedPtr->EventHandle;
return result;
}
[CLSCompliant(false)]
[MonoTODO ("Security - we need to propagate the call stack")]
unsafe public NativeOverlapped *Pack (IOCompletionCallback iocb)
{
NativeOverlapped *result = (NativeOverlapped *) Marshal.AllocHGlobal (Marshal.SizeOf (typeof (NativeOverlapped)));
result->OffsetLow = offsetL;
result->OffsetHigh = offsetH;
result->EventHandle = evt;
return result;
}
[CLSCompliant(false)]
[SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
unsafe public NativeOverlapped *UnsafePack (IOCompletionCallback iocb)
{
// no need to propagate the call stack in the unsafe version
return Pack (iocb);
}
public IAsyncResult AsyncResult {
get { return ares; }
set { ares = value; }
}
public int EventHandle {
get { return evt; }
set { evt = value; }
}
public int OffsetHigh {
get { return offsetH; }
set { offsetH = value; }
}
public int OffsetLow {
get { return offsetL; }
set { offsetL = value; }
}
}
}
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