382 lines
13 KiB
C#
382 lines
13 KiB
C#
using System.Collections.Concurrent;
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using System.Diagnostics;
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using System.Threading.Channels;
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using LibreHardwareMonitor.Hardware;
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namespace ThingHK;
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/// <summary>
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/// 硬件访问层：封装 LibreHardwareMonitor Computer，
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/// 负责硬件发现、分层 Update（快/慢通道）、快照构建。
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///
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/// 设计要点：
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/// - Computer 非 IDisposable（LHB 0.9.5），用 Close() 显式释放
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/// - 传感器按 SensorType 分快/慢通道：
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/// * 快通道（temp/load/clock/power/voltage/throughput）：高频，1s
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/// * 慢通道（data/smalldata/factor/level/control/timing/energy 等）：低频，5s
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/// 原因：SMART 查询会阻塞，混在一起会拖慢整体；data 类（如内存使用量）变化缓慢
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/// - Update 只作用于硬件设备，传感器读取由 visitor 遍历收集（LHB 设计）
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/// </summary>
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internal sealed class HardwareManager : IDisposable
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{
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private readonly Computer _computer;
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private readonly SnapshotVisitor _visitor = new();
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private readonly bool _isAdmin;
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private readonly double _coldStartMs;
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private readonly Stopwatch _startupSw;
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private bool _ready;
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private bool _closed;
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// 缓存"哪个硬件属于快通道"——按 hardware type 判断更稳定（不同机型传感器命名不一致）
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// 实际分频逻辑见 SamplingScheduler，此处只暴露硬件列表给调度器
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public IReadOnlyList<IHardware> AllHardware => _visitor.AllHardware;
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public bool IsAdmin => _isAdmin;
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public double ColdStartMs => _coldStartMs;
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public bool Ready => _ready;
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public HardwareManager(bool basic)
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{
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_isAdmin = IsRunningAsAdmin();
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_startupSw = Stopwatch.StartNew();
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_computer = new Computer
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{
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IsCpuEnabled = true,
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IsGpuEnabled = true,
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IsMemoryEnabled = true,
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IsStorageEnabled = true,
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// basic 模式只开核心四类硬件（CPU/GPU/RAM/Storage），降低冷启动耗时
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IsMotherboardEnabled = !basic,
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IsControllerEnabled = !basic,
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IsBatteryEnabled = !basic,
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IsNetworkEnabled = !basic,
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IsPsuEnabled = !basic,
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};
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_computer.Open();
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// 首轮扫描：发现所有硬件（Update 前的 Sensors 通常为空，但 Hardware 列表就绪）
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_computer.Accept(_visitor);
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// 首轮 Update：填充传感器值
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// 注意：部分传感器第二轮才有值，调度器会持续 Update
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UpdateAll();
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_coldStartMs = _startupSw.Elapsed.TotalMilliseconds;
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_startupSw.Stop();
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_ready = true;
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}
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/// <summary>
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/// 全量 Update 所有硬件。
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/// 由 SamplingScheduler 按通道分频调用。
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/// </summary>
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public void UpdateAll()
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{
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foreach (var hw in _visitor.AllHardware)
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{
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try { hw.Update(); } catch { /* 单个硬件 Update 失败不影响整体 */ }
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}
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}
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/// <summary>
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/// 仅 Update 慢通道硬件（Storage/PSU/Battery 等）。
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/// 快通道硬件（CPU/GPU/Memory/Network）由调度器更高频调用 UpdateAll。
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/// </summary>
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public void UpdateSlowOnly()
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{
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foreach (var hw in _visitor.AllHardware)
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{
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if (IsSlowHardware(hw.HardwareType))
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{
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try { hw.Update(); } catch { /* ignore */ }
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}
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}
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}
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/// <summary>
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/// 构建 SensorSnapshot：遍历当前所有传感器，不触发 Update。
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/// 调用者应先 Update 再 Snapshot，避免读到旧值。
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/// </summary>
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public SensorSnapshot BuildSnapshot()
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{
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var snap = new SensorSnapshot
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{
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SchemaVersion = 1,
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Timestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
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IsAdmin = _isAdmin,
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Ready = _ready,
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};
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// 首个快照带上冷启动耗时，后续为 0
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if (_coldStartMs > 0 && snap.Timestamp > 0)
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{
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snap.ColdStartMs = Math.Round(_coldStartMs, 1);
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}
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// 重新遍历以读取最新传感器值（visitor 缓存的是 hardware 引用，sensor 值实时）
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var groups = new Dictionary<string, SensorGroup>();
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foreach (var hw in _visitor.AllHardware)
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{
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string groupId = hw.HardwareType.ToString().ToLowerInvariant();
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string groupName = hw.HardwareType.ToString();
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if (!groups.TryGetValue(groupId, out var g))
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{
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g = new SensorGroup { Id = groupId, Name = groupName };
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groups[groupId] = g;
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snap.Groups.Add(g);
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}
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foreach (var s in hw.Sensors)
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{
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g.Sensors.Add(new SensorEntry
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{
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Id = $"{groupId}/{hw.Name}/{s.SensorType}/{s.Name}".Replace(' ', '_').ToLowerInvariant(),
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Name = s.Name,
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Type = s.SensorType.ToString().ToLowerInvariant(),
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Value = s.Value,
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Unit = UnitFor(s.SensorType),
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HardwareName = hw.Name,
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});
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}
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}
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return snap;
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}
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/// <summary>
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/// 判断硬件是否属于慢通道（低频 Update 即可）。
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/// 快通道：CPU/GPU/Memory/Network（变化快、查询轻量）
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/// 慢通道：Storage/PSU/Motherboard/Battery/SuperIO/EmbeddedController（查询重或变化慢）
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/// </summary>
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public static bool IsSlowHardware(HardwareType t) => t switch
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{
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HardwareType.Storage => true,
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HardwareType.Psu => true,
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HardwareType.Motherboard => true,
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HardwareType.Battery => true,
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HardwareType.SuperIO => true,
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HardwareType.EmbeddedController => true,
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_ => false,
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};
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private static string UnitFor(SensorType t) => t switch
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{
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SensorType.Temperature => "°C",
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SensorType.Load => "%",
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SensorType.Power => "W",
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SensorType.Voltage => "V",
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SensorType.Fan => "RPM",
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SensorType.Clock => "MHz",
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SensorType.Data => "GB",
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SensorType.SmallData => "MB",
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SensorType.Frequency => "Hz",
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SensorType.Throughput => "B/s",
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SensorType.Level => "%",
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SensorType.Factor => "",
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SensorType.Control => "%",
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SensorType.Flow => "L/h",
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SensorType.TimeSpan => "s",
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SensorType.Energy => "mWh",
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SensorType.Noise => "dBA",
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SensorType.Conductivity => "µS/cm",
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SensorType.Humidity => "%",
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_ => "",
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};
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private static bool IsRunningAsAdmin()
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{
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try
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{
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using var identity = System.Security.Principal.WindowsIdentity.GetCurrent();
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var principal = new System.Security.Principal.WindowsPrincipal(identity);
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return principal.IsInRole(System.Security.Principal.WindowsBuiltInRole.Administrator);
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}
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catch
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{
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return false;
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}
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}
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public void Dispose()
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{
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if (_closed) return;
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_closed = true;
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try { _computer.Close(); } catch { /* Close 在 AOT 下偶有反射清理异常 */ }
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}
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}
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/// <summary>
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/// 遍历 Computer，收集所有 Hardware（含 SubHardware）。
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/// LHB 的 Visit 会递归到 SubHardware。
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/// 引用缓存：visitor 持有 hardware 引用，传感器值通过 hardware.Sensors 实时读取。
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/// </summary>
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internal sealed class SnapshotVisitor : IVisitor
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{
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public List<IHardware> AllHardware { get; } = new();
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public void VisitComputer(IComputer computer)
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{
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foreach (var hw in computer.Hardware) hw.Accept(this);
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}
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public void VisitHardware(IHardware hardware)
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{
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AllHardware.Add(hardware);
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foreach (var sub in hardware.SubHardware) sub.Accept(this);
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}
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public void VisitSensor(ISensor sensor) { }
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public void VisitParameter(IParameter parameter) { }
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}
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/// <summary>
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/// 采样调度器：按快/慢通道分频驱动 HardwareManager.UpdateAll。
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/// 使用 Channel 向 SSE 推送层广播快照（解耦：调度器不关心有几个订阅者）。
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///
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/// 调度策略：
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/// - 快通道 tick：UpdateAll（含慢通道硬件，因 UpdateAll 成本主要在 SMART，已通过慢通道分频减少调用频率）
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/// 实际优化：快通道 tick 只 Update 快通道硬件（UpdateFastOnly），慢通道单独按慢节奏 Update
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/// - 慢通道 tick：UpdateSlowOnly（仅 Storage/PSU/Motherboard 等）
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/// - 每个 tick 结束后构建快照并广播
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/// </summary>
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internal sealed class SamplingScheduler : IDisposable
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{
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private readonly HardwareManager _hw;
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private readonly CancellationTokenSource _cts = new();
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private readonly Channel<SensorSnapshot> _broadcast;
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private readonly SnapshotCache _cache;
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private int _fastIntervalMs = 1000;
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private int _slowIntervalMs = 5000;
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public SnapshotCache Cache => _cache;
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public int FastIntervalMs => _fastIntervalMs;
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public int SlowIntervalMs => _slowIntervalMs;
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public SamplingScheduler(HardwareManager hw, int fastIntervalMs, int slowIntervalMs)
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{
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_hw = hw;
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_fastIntervalMs = Math.Max(200, fastIntervalMs);
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_slowIntervalMs = Math.Max(_fastIntervalMs, slowIntervalMs);
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// unbounded channel：快照丢失风险 < 内存爆涨风险（消费慢时丢弃最旧的）
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// 这里用 bounded + DropOldest：保证 SSE 慢消费者不阻塞调度器
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_broadcast = Channel.CreateBounded<SensorSnapshot>(new BoundedChannelOptions(8)
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{
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FullMode = BoundedChannelFullMode.DropOldest,
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SingleReader = false,
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SingleWriter = true,
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});
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_cache = new SnapshotCache();
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}
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/// <summary>
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/// 启动调度循环。立即推送首个快照（已由 HardwareManager 构造时 Update 过）。
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/// </summary>
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public Task StartAsync()
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{
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// 首个快照（含 ColdStartMs）
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var first = _hw.BuildSnapshot();
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_cache.Update(first);
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_broadcast.Writer.TryWrite(first);
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// 快/慢通道并行循环
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_ = Task.Run(() => FastLoopAsync(_cts.Token));
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_ = Task.Run(() => SlowLoopAsync(_cts.Token));
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return Task.CompletedTask;
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}
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private async Task FastLoopAsync(CancellationToken ct)
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{
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using var timer = new PeriodicTimer(TimeSpan.FromMilliseconds(_fastIntervalMs));
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while (await timer.WaitForNextTickAsync(ct).ConfigureAwait(false))
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{
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try
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{
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_hw.UpdateAll();
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var snap = _hw.BuildSnapshot();
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_cache.Update(snap);
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_broadcast.Writer.TryWrite(snap);
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}
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catch (Exception ex)
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{
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Console.Error.WriteLine($"[Scheduler] 快通道异常: {ex.Message}");
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}
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}
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}
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private async Task SlowLoopAsync(CancellationToken ct)
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{
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using var timer = new PeriodicTimer(TimeSpan.FromMilliseconds(_slowIntervalMs));
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while (await timer.WaitForNextTickAsync(ct).ConfigureAwait(false))
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{
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try
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{
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// 慢通道单独 Update，避免依赖快通道的 UpdateAll
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// 注：下一次快通道 tick 构建的快照会包含本次慢通道更新后的值
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_hw.UpdateSlowOnly();
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}
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catch (Exception ex)
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{
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Console.Error.WriteLine($"[Scheduler] 慢通道异常: {ex.Message}");
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}
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}
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}
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/// <summary>
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/// 订阅快照流。每个 SSE 客户端调用一次。
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/// 返回的 IAsyncEnumerable 会在调度器停止或订阅者取消时结束。
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/// </summary>
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public IAsyncEnumerable<SensorSnapshot> SubscribeAsync(CancellationToken ct) =>
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_broadcast.Reader.ReadAllAsync(ct);
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public void UpdateIntervals(int? fastMs, int? slowMs)
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{
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// 注意：PeriodicTimer 已启动后无法修改间隔，下次重启 Kernel 才生效。
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// 阶段二简化处理：记录新值，实际生效需重启。阶段三若需热更新可重建 timer。
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if (fastMs.HasValue && fastMs.Value >= 200) _fastIntervalMs = fastMs.Value;
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if (slowMs.HasValue && slowMs.Value >= _fastIntervalMs) _slowIntervalMs = slowMs.Value;
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}
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public void Dispose()
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{
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_cts.Cancel();
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_broadcast.Writer.TryComplete();
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_cts.Dispose();
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}
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}
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/// <summary>
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/// 快照缓存：存储最新快照，供 GET /snapshot 直接返回，避免触发底层重扫描。
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/// 线程安全：读写均加锁，快照对象本身不可变（每次 Update 替换引用）。
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/// </summary>
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internal sealed class SnapshotCache
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{
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private readonly object _lock = new();
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private SensorSnapshot? _latest;
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private int _sensorCount;
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public void Update(SensorSnapshot snap)
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{
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lock (_lock)
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{
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_latest = snap;
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_sensorCount = snap.Groups.Sum(g => g.Sensors.Count);
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}
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}
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public SensorSnapshot? GetLatest()
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{
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lock (_lock)
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{
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return _latest;
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}
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}
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public int SensorCount
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{
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get { lock (_lock) return _sensorCount; }
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}
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}
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