justme
ad5efc62ff
Replace Probe with Agent across node runtime, Fleet contracts, backend state, API and storage. Report incoming sessions and outgoing link health through each Agent uplink, and retain directed link controls and retry. Update protocol fixtures and end-to-end coverage for the unified model; accept requested cancellation during the Fleet timeout test cleanup.
27 lines
1.1 KiB
C#
27 lines
1.1 KiB
C#
namespace MoShiro.Measurement;
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/// <summary>节点的单调时钟（微秒）：t1…t4、t_send、t_recv 都用它；每个节点各一个，块头里的时钟锚点把它对应到 UTC。</summary>
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public sealed class MonoClock
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{
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private readonly TimeProvider _time;
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public MonoClock(TimeProvider time)
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{
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_time = time;
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}
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public TimeProvider Time => _time;
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public long NowUs()
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{
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long ticks = _time.GetTimestamp();
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// 先除后乘会丢精度，先乘再除在 64 位内不会溢出（频率通常是 1e9 或 1e7）
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return (ticks / _time.TimestampFrequency * 1_000_000) + (ticks % _time.TimestampFrequency * 1_000_000 / _time.TimestampFrequency);
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}
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public ClockAnchor Anchor() => new(NowUs(), _time.GetUtcNow().ToUnixTimeMilliseconds());
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/// <summary>单调时钟读数 <paramref name="thenUs"/> 对应的 UTC 毫秒（只用于块的粗略起点，精确时间由块头的时钟锚点换算）。</summary>
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public long UtcMsAt(long thenUs) => _time.GetUtcNow().ToUnixTimeMilliseconds() - (Math.Max(0, NowUs() - thenUs) / 1000);
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}
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