147 lines
5.3 KiB
C#
147 lines
5.3 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="MatrixParallel.Await"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Mathematics.Numeric
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{
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public static partial class MatrixParallel
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{
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private static AwaitingQueue _awaitingLeaderHandle;
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private static volatile int _createGeneration = 0;
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private static int _sortState;
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public static MatrixParallelThread[] LeadParallel(int recommendCount)
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{
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int min = int.Min(recommendCount, _threads.Capacity);
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min /= 2;
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MatrixParallelThread[] ret;
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if (_threads.Count < min)
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{
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WaitHandle handle = new WaitHandle
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(
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_createGeneration,
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min,
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recommendCount
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);
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do
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{
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if (Interlocked.Exchange(ref _sortState, 1) == 0)
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{
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_awaitingLeaderHandle.Enqueue(handle);
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_ = Interlocked.Exchange(ref _sortState, 0);
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Interlocked.Increment(ref _createGeneration);
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break;
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}
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} while (true);
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int cycleGeneration = _createGeneration;
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do
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{
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Thread.Sleep(0);
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if (_createGeneration != cycleGeneration)
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{
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if (Interlocked.Exchange(ref _sortState, 1) == 0)
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{
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if (_awaitingLeaderHandle.TryPopIfRefEqual(cycleGeneration, in handle))
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{
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// Sort is implemented in TryPopIfRefEqual
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ret = _threads.PopRange(handle.BestCount);
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_createGeneration++;
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_ = Interlocked.Exchange(ref _sortState, 0);
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return ret;
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}
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_ = Interlocked.Exchange(ref _sortState, 0);
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} else
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{
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cycleGeneration = _createGeneration;
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}
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}
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} while (true);
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} else
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{
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// directly get the leader
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while (true)
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{
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if (Interlocked.Exchange(ref _sortState, 1) == 0)
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{
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ret = _threads.PopRange(recommendCount);
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_createGeneration++;
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_ = Interlocked.Exchange(ref _sortState, 0);
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return ret;
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}
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}
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}
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// return ret;
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}
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public static void ReturnParallelResources(ref MatrixParallelThread[] pool)
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{
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while (true)
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{
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if (Interlocked.Exchange(ref _sortState, 1) == 0)
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{
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_threads.PushRange(pool);
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Interlocked.Exchange(ref _sortState, 0);
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break;
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}
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}
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pool = null!;
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}
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private record class WaitHandle(int generation, int least, int best)
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{
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public int CreateGeneration { get; init; } = generation;
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public int LeastCount { get; init; } = least;
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public int BestCount { get; init; } = best;
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public int Priority { get; private set; }
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void UpdatePriority(int currentGeneration)
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{
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Priority = (currentGeneration - CreateGeneration) * (MatrixParallel._threads.Capacity - LeastCount);
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}
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}
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}
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}
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