123 lines
4.5 KiB
C#
123 lines
4.5 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="L4.Predict"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. 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.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.HighPerformance.Memory
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{
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public interface IPrefetchPredict
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{
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/// <summary>
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/// Writes predicted cache line descriptors into <paramref name="node" />.
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/// </summary>
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/// <param name="node">
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/// Prediction output buffer.
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/// </param>
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/// <param name="count">
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/// When this method returns, contains the number of valid entries written to <paramref
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/// name="node" />. The value must not exceed <paramref name="node" />.Length.
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/// </param>
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/// <returns>
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/// <see langword="true" /> if any prediction data was produced; otherwise, <see langword="false"
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/// />.
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/// </returns>
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bool Predict(Span<CacheLinePrediction> node, out int count);
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/// <summary>
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/// Materializes the cache line identified by <paramref name="origin" /> into <paramref
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/// name="cache" />.
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/// </summary>
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/// <param name="origin">
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/// Source address associated with the cache line.
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/// </param>
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/// <param name="policy">
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/// Mapping policy associated with the cache line.
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/// </param>
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/// <param name="cache">
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/// Destination cache line buffer.
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/// </param>
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void Prefetch(nuint origin, ulong policy, Span<byte> cache);
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/// <summary>
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/// Writes the cache line in <paramref name="cache" /> back to <paramref name="origin" />.
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/// </summary>
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/// <param name="origin">
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/// Source address associated with the cache line.
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/// </param>
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/// <param name="policy">
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/// Mapping policy associated with the cache line.
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/// </param>
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/// <param name="cache">
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/// Source cache line buffer.
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/// </param>
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void WriteBack(nuint origin, ulong policy, ReadOnlySpan<byte> cache);
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}
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public struct CacheLinePrediction : IEquatable<CacheLinePrediction>
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{
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public override readonly bool Equals(object? obj)
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{
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return obj is CacheLinePrediction prediction &&
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Address.Equals(prediction.Address) &&
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MapPolicy == prediction.MapPolicy;
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}
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public readonly bool Equals(CacheLinePrediction other)
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{
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return
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Address == other.Address && MapPolicy == other.MapPolicy;
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}
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public override readonly int GetHashCode()
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{
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return HashCode.Combine(Address, MapPolicy);
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}
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public static bool operator !=(CacheLinePrediction left, CacheLinePrediction right)
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{
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return !(left == right);
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}
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public static bool operator ==(CacheLinePrediction left, CacheLinePrediction right)
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{
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return left.Equals(right);
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}
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#pragma warning disable CA1051
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public nuint Address;
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public ulong MapPolicy;
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#pragma warning restore CA1051
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}
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}
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