RaspberryIO_26/Unosquare.WiringPi/SystemInfo.cs

using System;

using Unosquare.RaspberryIO.Abstractions;

namespace Unosquare.WiringPi {
  /// <summary>
  /// Represents the WiringPi system info.
  /// </summary>
  /// <seealso cref="ISystemInfo" />
  public class SystemInfo : ISystemInfo {
    private static readonly Object Lock = new Object();
    private static Boolean _revGetted;
    private static BoardRevision _boardRevision = BoardRevision.Rev2;

    /// <inheritdoc />
    public BoardRevision BoardRevision => GetBoardRevision();

    /// <inheritdoc />
    public Version LibraryVersion {
      get {
        String[] libParts = Native.WiringPi.WiringPiLibrary.Split('.');
        Int32 major = Int32.Parse(libParts[^2]);
        Int32 minor = Int32.Parse(libParts[^1]);
        return new Version(major, minor);
      }
    }

    internal static BoardRevision GetBoardRevision() {
      lock(Lock) {
        if(_revGetted) {
          return _boardRevision;
        }

        Int32 val = Native.WiringPi.PiBoardRev();
        _boardRevision = val == 1 ? BoardRevision.Rev1 : BoardRevision.Rev2;
        _revGetted = true;
      }

      return _boardRevision;
    }
  }
}