スレッドセキュリティのリストセット(パフォーマンスが悪い..

18066 ワード

MSはListのスレッドセキュリティのセットを提供していないためである.自分で1つ書きましたが、性能は...高くありません.性能に対する要求が高い場合に用いることができる.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace System.Collections.Concurrent
{
///


/// List 
/// 
///  
public class ConcurrentList : IList
{
///


/// List 
/// 
public ConcurrentList()
{
list = new List();
}
///


/// 
/// 
protected List list;
///


/// 
/// 
protected int lockInt;
#region IList
///


/// ， System.Collections.Generic.List 。
/// 
///  
/// 
public int IndexOf(T item)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
return list.IndexOf(item);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
///


/// System.Collections.Generic.List 。
/// 
///  
///  
public void Insert(int index, T item)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
list.Insert(index, item);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
///


/// System.Collections.Generic.List 。
/// 
///  
public void RemoveAt(int index)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
list.RemoveAt(index);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
public T this[int index]
{
get
{
System.Threading.Interlocked.Increment(ref lockInt);
try
{
return list[index];
}
finally
{
System.Threading.Interlocked.Decrement(ref lockInt);
}
}
set
{
System.Threading.Interlocked.Increment(ref lockInt);
try
{
list[index] = value;
}
finally
{
System.Threading.Interlocked.Decrement(ref lockInt);
}
}
}
public void Add(T item)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
list.Add(item);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
public void Clear()
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
list.Clear();
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
public bool Contains(T item)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
return list.Contains(item);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
public void CopyTo(T[] array, int arrayIndex)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
list.CopyTo(array, arrayIndex);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
public int Count
{
get
{
System.Threading.Interlocked.Increment(ref lockInt);
try
{
return list.Count;
}
finally
{
System.Threading.Interlocked.Decrement(ref lockInt);
}
}
}
public bool IsReadOnly
{
get { return false; }
}
///


/// System.Collections.Generic.List 。
/// 
///  
/// 
public bool Remove(T item)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
return list.Remove(item);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
public IEnumerator GetEnumerator()
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
return list.GetEnumerator();
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
#endregion
/// 
/// 
/// 
System.Threading.SpinLock splock = new System.Threading.SpinLock();
/// 
/// System.Collections.Generic.List 。
/// 
///  
///  
/// 
public List GetRange(int index, int count)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
return list.GetRange(index, count);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
/// 
/// System.Collections.Generic.List 。
/// 
///  。
///  
public void RemoveRange(int index, int count)
{
bool gotLock = false;
try
{
splock.Enter(ref gotLock);
list.RemoveRange(index, count);
}
finally
{
if (gotLock)
{
splock.Exit();
}
}
}
}
}

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