2 // NativeBuffer.cs: class for handling native pointers.
5 // Brian Ritchie (brianlritchie@hotmail.com)
6 // Sureshkumar T <tsureshkumar@novell.com> 2004.
8 // Copyright (C) Brian Ritchie, 2002
12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
37 using System.Data.Common;
39 using System.Runtime.InteropServices;
41 namespace System.Data.Odbc
43 sealed class NativeBuffer : IDisposable
47 private bool disposed;
49 public NativeBuffer ()
61 get { return _length; }
64 public void AllocBuffer (int length)
67 _ptr = Marshal.AllocCoTaskMem (length);
71 public void FreeBuffer ()
73 if (_ptr == IntPtr.Zero)
76 Marshal.FreeCoTaskMem (_ptr);
81 public void EnsureAlloc (int length)
83 if (Size == length && _ptr != IntPtr.Zero)
89 public void Dispose (bool disposing)
98 public void Dispose ()
101 GC.SuppressFinalize (this);
109 public static implicit operator IntPtr (NativeBuffer buf)