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//
// System.IO.MonoSyncFileStream.cs: Synchronous FileStream with
// asynchronous BeginRead/Write methods.
//
// Authors:
// Robert Jordan (robertj@gmx.net)
//
// Copyright (C) 2007 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;
using System.Runtime.Remoting.Messaging;
namespace System.IO
{
internal class MonoSyncFileStream : FileStream
{
public MonoSyncFileStream (IntPtr handle, FileAccess access, bool ownsHandle, int bufferSize)
: base (handle, access, ownsHandle, bufferSize, false)
{
}
delegate void WriteDelegate (byte [] buffer, int offset, int count);
public override IAsyncResult BeginWrite (byte [] buffer, int offset, int count,
AsyncCallback cback, object state)
{
if (!CanWrite)
throw new NotSupportedException ("This stream does not support writing");
if (buffer == null)
throw new ArgumentNullException ("buffer");
if (count < 0)
throw new ArgumentOutOfRangeException ("count", "Must be >= 0");
if (offset < 0)
throw new ArgumentOutOfRangeException ("offset", "Must be >= 0");
WriteDelegate d = new WriteDelegate (this.Write);
return d.BeginInvoke (buffer, offset, count, cback, state);
}
public override void EndWrite (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
AsyncResult ar = asyncResult as AsyncResult;
if (ar == null)
throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
WriteDelegate d = ar.AsyncDelegate as WriteDelegate;
if (d == null)
throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
d.EndInvoke (asyncResult);
}
delegate int ReadDelegate (byte [] buffer, int offset, int count);
public override IAsyncResult BeginRead (byte [] buffer, int offset, int count,
AsyncCallback cback, object state)
{
if (!CanRead)
throw new NotSupportedException ("This stream does not support reading");
if (buffer == null)
throw new ArgumentNullException ("buffer");
if (count < 0)
throw new ArgumentOutOfRangeException ("count", "Must be >= 0");
if (offset < 0)
throw new ArgumentOutOfRangeException ("offset", "Must be >= 0");
ReadDelegate d = new ReadDelegate (this.Read);
return d.BeginInvoke (buffer, offset, count, cback, state);
}
public override int EndRead (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
AsyncResult ar = asyncResult as AsyncResult;
if (ar == null)
throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
ReadDelegate d = ar.AsyncDelegate as ReadDelegate;
if (d == null)
throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
return d.EndInvoke (asyncResult);
}
}
}
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