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ComArray.cs
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// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
//
// 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;
using System.Collections;
using System.Collections.Generic;
namespace SharpDX
{
/// <summary>
/// A fast method to pass array of <see cref="ComObject"/> to SharpDX methods.
/// </summary>
public class ComArray : DisposeBase, IEnumerable
{
protected ComObject[] values;
private IntPtr nativeBuffer;
/// <summary>
/// Initializes a new instance of the <see cref="ComArray"/> class.
/// </summary>
/// <param name="array">The array.</param>
public ComArray(params ComObject[] array)
{
values = array;
nativeBuffer = IntPtr.Zero;
if (values != null)
{
int length = array.Length;
values = new ComObject[length];
nativeBuffer = Utilities.AllocateMemory(length * Utilities.SizeOf<IntPtr>());
for(int i = 0; i < length; i++)
Set(i, array[i]);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ComArray"/> class.
/// </summary>
/// <param name="size">The size.</param>
public ComArray(int size)
{
values = new ComObject[size];
nativeBuffer = Utilities.AllocateMemory(size * Utilities.SizeOf<IntPtr>());
}
/// <summary>
/// Gets the pointer to the native array associated to this instance.
/// </summary>
public IntPtr NativePointer
{
get
{
return nativeBuffer;
}
}
/// <summary>
/// Gets the length.
/// </summary>
public int Length
{
get
{
return values == null ? 0 : values.Length;
}
}
/// <summary>
/// Gets an object at the specified index.
/// </summary>
/// <param name="index">The index.</param>
/// <returns>A <see cref="ComObject"/></returns>
public ComObject Get(int index)
{
return values[index];
}
internal void SetFromNative(int index, ComObject value)
{
values[index] = value;
unsafe
{
value.NativePointer = ((IntPtr*)nativeBuffer)[index];
}
}
/// <summary>
/// Sets an object at the specified index.
/// </summary>
/// <param name="index">The index.</param>
/// <param name="value">The value.</param>
public void Set(int index, ComObject value)
{
values[index] = value;
unsafe
{
((IntPtr*)nativeBuffer)[index] = value.NativePointer;
}
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
values = null;
}
Utilities.FreeMemory(nativeBuffer);
nativeBuffer = IntPtr.Zero;
}
/// <inheritdoc/>
public IEnumerator GetEnumerator()
{
return values.GetEnumerator();
}
}
/// <summary>
/// A typed version of <see cref="ComArray"/>
/// </summary>
/// <typeparam name="T">Type of the <see cref="ComObject"/></typeparam>
public class ComArray<T> : ComArray, IEnumerable<T> where T : ComObject
{
/// <summary>
/// Initializes a new instance of the <see cref="ComArray<T>"/> class.
/// </summary>
/// <param name="array">The array.</param>
public ComArray(params T[] array) : base(array)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ComArray<T>"/> class.
/// </summary>
/// <param name="size">The size.</param>
public ComArray(int size) : base(size)
{
}
/// <summary>
/// Gets or sets the <see cref="T"/> with the specified i.
/// </summary>
public T this[int i]
{
get
{
return (T)Get(i);
}
set
{
Set(i, value);
}
}
public new IEnumerator<T> GetEnumerator()
{
return new ArrayEnumerator<T>(values.GetEnumerator());
}
private struct ArrayEnumerator<T1> : IEnumerator<T1> where T1 : ComObject
{
private readonly IEnumerator enumerator;
public ArrayEnumerator(IEnumerator enumerator)
{
this.enumerator = enumerator;
}
public void Dispose()
{
}
public bool MoveNext()
{
return enumerator.MoveNext();
}
public void Reset()
{
enumerator.Reset();
}
public T1 Current
{
get
{
return (T1)enumerator.Current;
}
}
object IEnumerator.Current
{
get
{
return Current;
}
}
}
}
}