268 lines
9.2 KiB
C#
268 lines
9.2 KiB
C#
#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;
|
|
using System.Diagnostics;
|
|
using System.Reflection;
|
|
|
|
namespace OpenTK
|
|
{
|
|
#region BlittableValueType<T>
|
|
|
|
/// <summary>
|
|
/// Checks whether the specified type parameter is a blittable value type.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// A blittable value type is a struct that only references other value types recursively,
|
|
/// which allows it to be passed to unmanaged code directly.
|
|
/// </remarks>
|
|
public static class BlittableValueType<T> where T : struct
|
|
{
|
|
#region Fields
|
|
|
|
static readonly Type Type;
|
|
|
|
#endregion
|
|
|
|
#region Constructors
|
|
|
|
static BlittableValueType()
|
|
{
|
|
Type = typeof(T);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Public Members
|
|
|
|
/// <summary>
|
|
/// Gets the size of the type in bytes.
|
|
/// </summary>
|
|
public static readonly int Stride = Marshal.SizeOf(typeof(T));
|
|
|
|
#region Check
|
|
|
|
/// <summary>
|
|
/// Checks whether the current typename T is blittable.
|
|
/// </summary>
|
|
public static bool Check()
|
|
{
|
|
return Check(Type);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks whether type is a blittable value type.
|
|
/// </summary>
|
|
/// <param name="type">A System.Type to check.</param>
|
|
public static bool Check(Type type)
|
|
{
|
|
if (!CheckStructLayoutAttribute(type))
|
|
Debug.Print("Warning: type {0} does not specify a StructLayoutAttribute with Pack=1. The memory layout of the struct may change between platforms.", type.Name);
|
|
|
|
return CheckType(type);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#endregion
|
|
|
|
#region Private Members
|
|
|
|
// Checks whether the parameter is a primitive type or consists of primitive types recursively.
|
|
// Throws a NotSupportedException if it is not.
|
|
static bool CheckType(Type type)
|
|
{
|
|
//Debug.Print("Checking type {0} (size: {1} bytes).", type.Name, Marshal.SizeOf(type));
|
|
if (type.IsPrimitive)
|
|
return true;
|
|
|
|
FieldInfo[] fields = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
|
|
Debug.Indent();
|
|
foreach (FieldInfo field in fields)
|
|
{
|
|
if (!CheckType(field.FieldType))
|
|
return false;
|
|
}
|
|
Debug.Unindent();
|
|
|
|
return true;
|
|
}
|
|
|
|
// Checks whether the specified struct defines [StructLayout(LayoutKind.Sequential, Pack=1)]
|
|
// or [StructLayout(LayoutKind.Explicit)]
|
|
static bool CheckStructLayoutAttribute(Type type)
|
|
{
|
|
StructLayoutAttribute[] attr = (StructLayoutAttribute[])
|
|
type.GetCustomAttributes(typeof(StructLayoutAttribute), true);
|
|
|
|
if ((attr == null) ||
|
|
(attr != null && attr.Length > 0 && attr[0].Value != LayoutKind.Explicit && attr[0].Pack != 1))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region BlittableValueType
|
|
|
|
/// <summary>
|
|
/// Checks whether the specified type parameter is a blittable value type.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// A blittable value type is a struct that only references other value types recursively,
|
|
/// which allows it to be passed to unmanaged code directly.
|
|
/// </remarks>
|
|
public static class BlittableValueType
|
|
{
|
|
#region Check
|
|
|
|
/// <summary>
|
|
/// Checks whether type is a blittable value type.
|
|
/// </summary>
|
|
/// <param name="type">An instance of the type to check.</param>
|
|
public static bool Check<T>(T type) where T : struct
|
|
{
|
|
return BlittableValueType<T>.Check();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks whether type is a blittable value type.
|
|
/// </summary>
|
|
/// <param name="type">An instance of the type to check.</param>
|
|
public static bool Check<T>(T[] type) where T : struct
|
|
{
|
|
return BlittableValueType<T>.Check();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks whether type is a blittable value type.
|
|
/// </summary>
|
|
/// <param name="type">An instance of the type to check.</param>
|
|
public static bool Check<T>(T[,] type) where T : struct
|
|
{
|
|
return BlittableValueType<T>.Check();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks whether type is a blittable value type.
|
|
/// </summary>
|
|
/// <param name="type">An instance of the type to check.</param>
|
|
public static bool Check<T>(T[, ,] type) where T : struct
|
|
{
|
|
return BlittableValueType<T>.Check();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks whether type is a blittable value type.
|
|
/// </summary>
|
|
/// <param name="type">An instance of the type to check.</param>
|
|
[CLSCompliant(false)]
|
|
public static bool Check<T>(T[][] type) where T : struct
|
|
{
|
|
return BlittableValueType<T>.Check();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region From
|
|
|
|
/// <summary>
|
|
/// Returns the size of the specified value type in bytes.
|
|
/// </summary>
|
|
/// <typeparam name="T">The value type. Must be blittable.</typeparam>
|
|
/// <param name="type">An instance of the value type.</param>
|
|
/// <returns>An integer, specifying the size of the type in bytes.</returns>
|
|
/// <exception cref="System.ArgumentException">Occurs when type is not blittable.</exception>
|
|
public static int StrideOf<T>(T type)
|
|
where T : struct
|
|
{
|
|
if (!Check(type))
|
|
throw new ArgumentException("type");
|
|
|
|
return BlittableValueType<T>.Stride;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns the size of a single array element in bytes.
|
|
/// </summary>
|
|
/// <typeparam name="T">The value type.</typeparam>
|
|
/// <param name="type">An instance of the value type.</param>
|
|
/// <returns>An integer, specifying the size of the type in bytes.</returns>
|
|
/// <exception cref="System.ArgumentException">Occurs when type is not blittable.</exception>
|
|
public static int StrideOf<T>(T[] type)
|
|
where T : struct
|
|
{
|
|
if (!Check(type))
|
|
throw new ArgumentException("type");
|
|
|
|
return BlittableValueType<T>.Stride;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns the size of a single array element in bytes.
|
|
/// </summary>
|
|
/// <typeparam name="T">The value type.</typeparam>
|
|
/// <param name="type">An instance of the value type.</param>
|
|
/// <returns>An integer, specifying the size of the type in bytes.</returns>
|
|
/// <exception cref="System.ArgumentException">Occurs when type is not blittable.</exception>
|
|
public static int StrideOf<T>(T[,] type)
|
|
where T : struct
|
|
{
|
|
if (!Check(type))
|
|
throw new ArgumentException("type");
|
|
|
|
return BlittableValueType<T>.Stride;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns the size of a single array element in bytes.
|
|
/// </summary>
|
|
/// <typeparam name="T">The value type.</typeparam>
|
|
/// <param name="type">An instance of the value type.</param>
|
|
/// <returns>An integer, specifying the size of the type in bytes.</returns>
|
|
/// <exception cref="System.ArgumentException">Occurs when type is not blittable.</exception>
|
|
public static int StrideOf<T>(T[, ,] type)
|
|
where T : struct
|
|
{
|
|
if (!Check(type))
|
|
throw new ArgumentException("type");
|
|
|
|
return BlittableValueType<T>.Stride;
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
|
|
#endregion
|
|
}
|