MemoryMappedViewAccessorExtensions.cs

// This file is part of iRacingSDK.
//
// Copyright 2014 Dean Netherton
// https://github.com/vipoo/iRacingSDK.Net
//
// iRacingSDK is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// iRacingSDK is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with iRacingSDK.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.IO.MemoryMappedFiles;

namespace iRacingSDK
{
	public static class MemoryMappedViewAccessorExtensions
	{
		public unsafe delegate T MyFn<T>(byte* ptr);

		public unsafe static T AcquirePointer<T>(this MemoryMappedViewAccessor self, MyFn<T> fn)
		{
			byte* ptr = null;
			self.SafeMemoryMappedViewHandle.AcquirePointer(ref ptr);
			try
			{
				return fn(ptr);
			}
			finally
			{
				self.SafeMemoryMappedViewHandle.ReleasePointer();
			}
		}
	}
	
}