using System; using System.Runtime.CompilerServices; namespace DotNext.Runtime { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public class SoftReferenceOptions { private readonly int collectionCount; private readonly long memoryLimit = 9223372036854775807; public static SoftReferenceOptions Default { get; } = new SoftReferenceOptions(); public int CollectionCount { get { return collectionCount; } set { if (value <= 0) throw new ArgumentOutOfRangeException("value"); collectionCount = value; } } public long MemoryLimit { get { return memoryLimit; } set { if (value <= 0) throw new ArgumentOutOfRangeException("value"); memoryLimit = value; } } internal bool KeepTracking(object target) { int generation = GC.GetGeneration(target); if (generation >= GC.MaxGeneration) { if (GC.CollectionCount(generation) <= collectionCount) { if (memoryLimit != 9223372036854775807) return CheckMemoryLimit(generation); return true; } return false; } return true; } private bool CheckMemoryLimit(int generation) { GCMemoryInfo gCMemoryInfo = GC.GetGCMemoryInfo(); if (gCMemoryInfo.Index != 0) { ReadOnlySpan<GCGenerationInfo> generationInfo; ReadOnlySpan<GCGenerationInfo> readOnlySpan = generationInfo = gCMemoryInfo.GenerationInfo; if (readOnlySpan.Length > generation) return generationInfo[generation].SizeAfterBytes < memoryLimit; } return true; } } }