mono/mcs/class/corlib/System.IO/HGlobalUnmanagedMemoryStream.cs

//
// HGlobalUnmanagedMemoryStream.cs
//
// Authors:
//	Marek Safar  <[email protected]>
//
// Copyright (C) 2015 Xamarin Inc (http://www.xamarin.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;

namespace System.IO
{
	unsafe class HGlobalUnmanagedMemoryStream : UnmanagedMemoryStream
	{
		IntPtr ptr;

		public HGlobalUnmanagedMemoryStream (byte* pointer, long length, IntPtr ptr)
			: base (pointer, length, length, FileAccess.ReadWrite)
		{
			this.ptr = ptr;
		}

		protected override void Dispose (bool disposing)
		{
			if (_isOpen) {
				Marshal.FreeHGlobal (ptr);
			}

			base.Dispose (disposing);
		}
	}	
}