using System; using System.Threading; namespace Renci.SshNet { internal class ForwardedPortStatus { private readonly int _value; private readonly string _name; public static readonly ForwardedPortStatus Stopped = new ForwardedPortStatus(1, "Stopped"); public static readonly ForwardedPortStatus Stopping = new ForwardedPortStatus(2, "Stopping"); public static readonly ForwardedPortStatus Started = new ForwardedPortStatus(3, "Started"); public static readonly ForwardedPortStatus Starting = new ForwardedPortStatus(4, "Starting"); private ForwardedPortStatus(int value, string name) { _value = value; _name = name; } public override bool Equals(object other) { if (other == null) return false; if (this == other) return true; ForwardedPortStatus forwardedPortStatus = other as ForwardedPortStatus; if (forwardedPortStatus == (ForwardedPortStatus)null) return false; return forwardedPortStatus._value == _value; } public static bool operator ==(ForwardedPortStatus left, ForwardedPortStatus right) { return left?.Equals(right) ?? ((object)right == null); } public static bool operator !=(ForwardedPortStatus left, ForwardedPortStatus right) { return !(left == right); } public override int GetHashCode() { return _value; } public override string ToString() { return _name; } public static bool ToStopping(ref ForwardedPortStatus status) { ForwardedPortStatus left = Interlocked.CompareExchange(ref status, Stopping, Started); if (left == Stopping || left == Stopped) return false; if (status == Stopping) return true; left = Interlocked.CompareExchange(ref status, Stopping, Starting); if (left == Stopping || left == Stopped) return false; if (status == Stopping) return true; throw new InvalidOperationException($"""{left}""{Stopping}"""); } public static bool ToStarting(ref ForwardedPortStatus status) { ForwardedPortStatus forwardedPortStatus = Interlocked.CompareExchange(ref status, Starting, Stopped); if (forwardedPortStatus == Starting || forwardedPortStatus == Started) return false; if (status == Starting) return true; throw new InvalidOperationException($"""{forwardedPortStatus}""{Starting}"""); } } }