ParallelQuery.cs :  » 2.6.4-mono-.net-core » System.Linq » System » Linq » C# / CSharp Open Source

//
// ParallelQuery.cs
//
// Author:
//       Jrmie "Garuma" Laval <jeremie.laval@gmail.com>
//
// Copyright (c) 2010 Jrmie "Garuma" Laval
//
// 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.Threading;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Concurrent;

#if NET_4_0

namespace System.Linq{
  public class ParallelQuery : IEnumerable
  {
    ParallelExecutionMode execMode = ParallelExecutionMode.Default;
    ParallelMergeOptions mergeOptions = ParallelMergeOptions.Default;

    internal ParallelQuery ()
    {

    }

    internal ParallelMergeOptions MergeOptions {
      get {
        return mergeOptions;
      }
      set {
        mergeOptions = value;
      }
    }

    internal ParallelExecutionMode ExecMode {
      get {
        return execMode;
      }
      set {
        execMode = value;
      }
    }

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

    // Trick to get the correct IEnumerator from ParallelQuery<TSource>
    internal virtual IEnumerator GetEnumeratorTrick ()
    {
      return null;
    }
    
    internal virtual ParallelQuery<object> TypedQuery {
      get {
        return null;
      }
    }
  }

  public class ParallelQuery<TSource> : ParallelQuery, IEnumerable<TSource>, IEnumerable
  {
    QueryBaseNode<TSource> node;

    internal ParallelQuery (QueryBaseNode<TSource> node)
    {
      this.node = node;
    }

    internal QueryBaseNode<TSource> Node {
      get {
        return node;
      }
    }

    public virtual IEnumerator<TSource> GetEnumerator ()
    {
      return GetEnumeratorInternal ();
    }

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

    IEnumerator<TSource> GetEnumeratorInternal ()
    {
      return new ParallelQueryEnumerator<TSource> (node);
    }

    internal override IEnumerator GetEnumeratorTrick ()
    {
      return (IEnumerator)GetEnumeratorInternal ();
    }
    
    internal override ParallelQuery<object> TypedQuery {
      get {
        return new ParallelQuery<object> (new QueryCastNode<TSource> (node));
      }
    }
  }
}
#endif