//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="MatrixParallelPool"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// 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 StgSharp.Collections;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp.Mathematics.Numeric
{
    public class MatrixParallelPool
    {

        private MatrixParallelPool()
        {
            throw new NotSupportedException();
        }

        internal MatrixParallelPool(int threadCount, ReadOnlySpan<MatrixParallelWrap> wrapSpan)
        {
            SpareWrap = CapacityFixedStackBuilder.Create(wrapSpan);
            SingleThreadAllocation = new CapacityFixedBag<MatrixParallelWrap>(wrapSpan.Length);
            SpareThreads = threadCount;
        }

        internal MatrixParallelPool(int threadCount, CapacityFixedStack<MatrixParallelWrap> wrapSpan)
        {
            SpareWrap = wrapSpan;
            SingleThreadAllocation = new CapacityFixedBag<MatrixParallelWrap>(wrapSpan.Count);
            SpareThreads = threadCount;
        }

        public int SpareThreads { get; set; }

        internal CapacityFixedBag<MatrixParallelWrap> SingleThreadAllocation { get; set; }

        internal CapacityFixedStack<MatrixParallelWrap> SpareWrap { get; set; }

        public bool TryRequestLeaderHandle(out MatrixParallelWrap.Handle handle) { }

        public bool TryRequestWrap(out MatrixParallelWrap? wrap)
        {
            if (SpareWrap.TryPop(out wrap))
            {
                SpareThreads -= wrap.WrapTaskCapacity;
                return true;
            } else
            {
                return false;
            }
        }

    }
}