SynchronizedCollection.cs :  » 2.6.4-mono-.net-core » System.Collections » System » Collections » Generic » C# / CSharp Open Source

//
// SynchronizedCollection.cs
//
// Author:
//  Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2005 Novell, Inc.  http://www.novell.com
//
// 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;
using System.Collections.ObjectModel;
using System.Runtime.InteropServices;

namespace System.Collections.Generic{
  [ComVisibleAttribute (false)] 
  public class SynchronizedCollection<T> : IList<T>, ICollection<T>, 
    IEnumerable<T>, IList, ICollection, IEnumerable
  {
    object root;
    List<T> list;

    public SynchronizedCollection ()
      : this (new object (), null, false)
    {
    }

    public SynchronizedCollection (object syncRoot)
      : this (syncRoot, null, false)
    {
    }

    public SynchronizedCollection (object syncRoot,
      IEnumerable<T> list)
      : this (syncRoot, new List<T> (list), false)
    {
    }

    public SynchronizedCollection (object syncRoot,
      params T [] list)
      : this (syncRoot, new List<T> (list), false)
    {
    }

    public SynchronizedCollection (object syncRoot,
      List<T> list, bool makeCopy)
    {
      if (syncRoot == null)
        syncRoot = new object ();
      root = syncRoot;
      if (list == null)
        this.list = new List<T> ();
      else if (makeCopy)
        this.list = new List<T> (list);
      else
        this.list = list;
    }

    public int Count {
      get {
        lock (root) {
          return list.Count;
        }
      }
    }

    public T this [int index] {
      get {
        lock (root) {
          return list [index];
        }
      }
      set {
        SetItem (index, value);
      }
    }

    public object SyncRoot {
      get { return root; }
    }

    protected List<T> Items {
      get { return list; }
    }

    public void Add (T item)
    {
      InsertItem (list.Count, item);
    }

    public void Clear ()
    {
      ClearItems ();
    }

    public bool Contains (T item)
    {
      lock (root) {
        return list.Contains (item);
      }
    }

    public void CopyTo (T [] array, int index)
    {
      lock (root) {
        list.CopyTo (array, index);
      }
    }

    [MonoTODO ("Should be synchronized enumerator?")]
    public IEnumerator<T> GetEnumerator ()
    {
      lock (root) {
        return list.GetEnumerator ();
      }
    }

    public int IndexOf (T item)
    {
      lock (root) {
        return list.IndexOf (item);
      }
    }

    public void Insert (int index, T item)
    {
      InsertItem (index, item);
    }

    [MonoTODO ("should we lock and remove item without invoking RemoveItem() instead?")]
    public bool Remove (T item)
    {
      int index = IndexOf (item);
      if (index < 0)
        return false;
      RemoveAt (index);
      return true;
    }

    public void RemoveAt (int index)
    {
      RemoveItem (index);
    }

    protected virtual void ClearItems ()
    {
      lock (root) {
        list.Clear ();
      }
    }

    protected virtual void InsertItem (int index, T item)
    {
      lock (root) {
        list.Insert (index, item);
      }
    }

    protected virtual void RemoveItem (int index)
    {
      lock (root) {
        list.RemoveAt (index);
      }
    }

    protected virtual void SetItem (int index, T item)
    {
      lock (root) {
        list [index] = item;
      }
    }

    #region Explicit interface implementations

    void ICollection.CopyTo (Array array, int index)
    {
      CopyTo ((T []) array, index);
    }

    IEnumerator IEnumerable.GetEnumerator ()
    {
      return GetEnumerator ();
    }

    int IList.Add (object value)
    {
      lock (root) {
        Add ((T) value);
        return list.Count - 1;
      }
    }

    bool IList.Contains (object value)
    {
      return Contains ((T) value);
    }

    int IList.IndexOf (object value)
    {
      return IndexOf ((T) value);
    }

    void IList.Insert (int index, object value)
    {
      Insert (index, (T) value);
    }

    void IList.Remove (object value)
    {
      Remove ((T) value);
    }

    bool ICollection<T>.IsReadOnly {
      get { return false; }
    }

    bool ICollection.IsSynchronized {
      get { return true; }
    }

    object ICollection.SyncRoot {
      get { return root; }
    }

    bool IList.IsFixedSize {
      get { return false; }
    }

    bool IList.IsReadOnly {
      get { return false; }
    }

    object IList.this [int index] {
      get { return this [index]; }
      set { this [index] = (T) value; }
    }

    #endregion
  }
}