120 lines
3.8 KiB
C#
120 lines
3.8 KiB
C#
//
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// System.IO.MonoSyncFileStream.cs: Synchronous FileStream with
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// asynchronous BeginRead/Write methods.
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//
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// Authors:
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// Robert Jordan (robertj@gmx.net)
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//
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// Copyright (C) 2007 Novell, Inc. (http://www.novell.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Runtime.Remoting.Messaging;
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namespace System.IO
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{
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internal class MonoSyncFileStream : FileStream
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{
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public MonoSyncFileStream (IntPtr handle, FileAccess access, bool ownsHandle, int bufferSize)
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: base (handle, access, ownsHandle, bufferSize, false)
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{
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}
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delegate void WriteDelegate (byte [] buffer, int offset, int count);
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public override IAsyncResult BeginWrite (byte [] buffer, int offset, int count,
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AsyncCallback cback, object state)
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{
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if (!CanWrite)
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throw new NotSupportedException ("This stream does not support writing");
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if (buffer == null)
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throw new ArgumentNullException ("buffer");
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if (count < 0)
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throw new ArgumentOutOfRangeException ("count", "Must be >= 0");
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if (offset < 0)
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throw new ArgumentOutOfRangeException ("offset", "Must be >= 0");
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WriteDelegate d = new WriteDelegate (this.Write);
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return d.BeginInvoke (buffer, offset, count, cback, state);
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}
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public override void EndWrite (IAsyncResult asyncResult)
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{
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if (asyncResult == null)
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throw new ArgumentNullException ("asyncResult");
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AsyncResult ar = asyncResult as AsyncResult;
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if (ar == null)
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throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
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WriteDelegate d = ar.AsyncDelegate as WriteDelegate;
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if (d == null)
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throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
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d.EndInvoke (asyncResult);
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}
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delegate int ReadDelegate (byte [] buffer, int offset, int count);
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public override IAsyncResult BeginRead (byte [] buffer, int offset, int count,
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AsyncCallback cback, object state)
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{
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if (!CanRead)
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throw new NotSupportedException ("This stream does not support reading");
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if (buffer == null)
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throw new ArgumentNullException ("buffer");
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if (count < 0)
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throw new ArgumentOutOfRangeException ("count", "Must be >= 0");
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if (offset < 0)
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throw new ArgumentOutOfRangeException ("offset", "Must be >= 0");
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ReadDelegate d = new ReadDelegate (this.Read);
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return d.BeginInvoke (buffer, offset, count, cback, state);
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}
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public override int EndRead (IAsyncResult asyncResult)
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{
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if (asyncResult == null)
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throw new ArgumentNullException ("asyncResult");
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AsyncResult ar = asyncResult as AsyncResult;
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if (ar == null)
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throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
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ReadDelegate d = ar.AsyncDelegate as ReadDelegate;
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if (d == null)
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throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
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return d.EndInvoke (asyncResult);
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}
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}
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}
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