Source/OpenTK/Compute/Structs.cs

#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2009 the Open Toolkit library.
//
// 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.
//
#endregion

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace OpenTK.Compute
{
    #region struct Handle<T>

    struct Handle<T> : IEquatable<Handle<T>>, IComparable<Handle<T>>
    {
        #region Fields

        IntPtr handle;

        public IntPtr Value { get { return handle; } }

        public static readonly Handle<T> Zero = new Handle<T>(IntPtr.Zero);

        #endregion

        #region Constructors

        public Handle(IntPtr h) { handle = h; }

        #endregion

        #region Public Members

        #region ToString

        public override string ToString()
        {
            return Value.ToString();
        }

        #endregion

        #region Equals

        public override bool Equals(object obj)
        {
            if (obj is Handle<T>)
                return this.Equals((Handle<T>)obj);
            return false;
        }

        #endregion

        #region GetHashCode

        public override int GetHashCode()
        {
            return Value.GetHashCode();
        }

        #endregion

        #region public static explicit operator IntPtr(Handle<T> c)

        public static explicit operator IntPtr(Handle<T> c)
        {
            return c != Handle<T>.Zero ? c.Value : IntPtr.Zero;
        }

        #endregion

        #region public static explicit operator Handle<T>(IntPtr p)

        public static explicit operator Handle<T>(IntPtr p)
        {
            return new Handle<T>(p);
        }

        #endregion

        public static bool operator ==(Handle<T> left, Handle<T> right)
        {
            return left.Equals(right);
        }

        public static bool operator !=(Handle<T> left, Handle<T> right)
        {
            return !left.Equals(right);
        }

        #endregion

        #region IComparable<Handle<T>> Members

        public int CompareTo(Handle<T> other)
        {
            unsafe
            {
                return Value.ToInt64().CompareTo(other.Value.ToInt64());
            }
        }

        #endregion

        #region IEquatable<Handle<T>> Members

        public bool Equals(Handle<T> other)
        {
            return Value == other.Value;
        }

        #endregion
    }

    #endregion

}

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