source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/Auxiliary/ResourcePoolExtensions.cs @ 13749

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

namespace Microsoft.Research.DynamicDataDisplay.Common.Auxiliary
{
  public static class ResourcePoolExtensions
  {
    /// <summary>
    /// Gets item from the pool, or creates new item if pool doesn't have more items.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="pool">The pool.</param>
    /// <returns></returns>
    public static T GetOrCreate<T>(this ResourcePool<T> pool) where T : new()
    {
      T instance = pool.Get();
      if (instance == null)
      {
        instance = new T();
      }

      return instance;
    }

    /// <summary>
    /// Releases all items of given sequence into the pool.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="pool">Pool, which will contain all released elements from the sequence.</param>
    /// <param name="sequence"></param>
    public static void ReleaseAll<T>(this ResourcePool<T> pool, IEnumerable<T> sequence)
    {
      foreach (var item in sequence)
      {
        pool.Put(item);
      }
    }
  }
}