33 lines
1.3 KiB
C#
33 lines
1.3 KiB
C#
using System.Net.Sockets;
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using System.Net.WebSockets;
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namespace Fleet.Core;
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/// <summary>
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/// 收尾类的等待（关闭、释放、等任务结束）一律要有上限：对端没了、原生层不回调、某个处理器卡住时，
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/// 没有上限的等待会让状态机永远停在「已连接」，既不重连也不报错。超时就放弃等待并交给调用方记日志；会话结束时的常见异常按正常噪声吞掉。
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/// </summary>
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public static class Bounded
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{
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/// <summary>收尾的一步最多等这么久。</summary>
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public static readonly TimeSpan Teardown = TimeSpan.FromSeconds(5);
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/// <summary>等 <paramref name="work"/> 最多 <paramref name="limit"/>；超时返回 false（任务继续在后台收尾，不再等它），否则返回 true。</summary>
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public static async Task<bool> WaitAsync(Task work, TimeSpan limit, TimeProvider time)
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{
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try
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{
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await work.WaitAsync(limit, time);
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return true;
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}
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catch (TimeoutException)
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{
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return false;
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}
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catch (Exception ex) when (ex is OperationCanceledException or IOException or ObjectDisposedException or InvalidOperationException or SocketException or WebSocketException)
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{
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return true; // 会话结束时的正常噪声：这一步已经结束了
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}
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}
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}
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