FDK17プロジェクト/コード/00.共通/CPowerPlan.cs

   1 using System;\r
   2 using System.Collections.Generic;\r
   3 using System.Linq;\r
   4 using System.Text;\r
   5 using System.Threading.Tasks;\r
   6 using System.Runtime.InteropServices;\r
   7 using System.Diagnostics;\r
   8 \r
   9 namespace FDK\r
  10 {\r
  11         /// <summary>\r
  12         /// 電源プランの制御を行う\r
  13         /// </summary>\r
  14         public static class CPowerPlan\r
  15         {\r
  16                 // 参考: 電源プラン制御: http://www.fsmpi.uni-bayreuth.de/~dun3/archives/programmatically-change-power-options-using-cshar/519.html\r
  17                 // 参考: ConnectedStandby判別: https://social.msdn.microsoft.com/Forums/en-US/eeb164a3-8ceb-4eb2-8768-4faaa7218c59/how-to-experimentally-confirm-that-connected-standby-mode-is-enabled-on-a-computer-system?forum=tailoringappsfordevices\r
  18                 //                             http://stackoverflow.com/questions/20407094/c-sharp-how-to-use-callntpowerinformation-with-interop-to-get-system-power-infor\r
  19 \r
  20                 readonly private static Guid GuidHighPerformance = new Guid( "8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c" );          // Vista以降は全部これのはず\r
  21                 private static Guid GuidBackup = Guid.Empty;\r
  22                 private static bool bConnectedStandbySupported = false;\r
  23 \r
  24 \r
  25                 public static void BackupCurrentPowerPlan()\r
  26                 {\r
  27                         bConnectedStandbySupported = IsConnetedStandbySupported();\r
  28                         \r
  29                         if ( bConnectedStandbySupported )\r
  30                         {\r
  31                                 // 何もしない\r
  32                         }\r
  33                         else\r
  34                         {\r
  35                                 GuidBackup = GetActivePowerPlan();\r
  36                                 Trace.TraceInformation( "現在の電源プラン「{0}」をバックアップしました。", GetFriendlyName( GuidBackup ) );\r
  37                         }\r
  38                 }\r
  39 \r
  40                 /// <summary>\r
  41                 /// Connected Standbyサポート機種かどうかの判定\r
  42                 /// (Connected Standby機種に対しては、電源プラン操作を行わない)\r
  43                 /// </summary>\r
  44                 private static bool IsConnetedStandbySupported()\r
  45                 {\r
  46                         if ( !COS.bIsWin8OrLater )\r
  47                         {\r
  48                                 // Win8以前であれば、ConnectedStandby非サポートが確定\r
  49                                 return false;\r
  50                         }\r
  51 \r
  52                         CWin32.SYSTEM_POWER_CAPABILITIES cap;\r
  53                         uint retval = CWin32.CallNtPowerInformation(\r
  54                                 (int) CWin32.POWER_INFORMATION_LEVEL.SystemPowerCapabilities,\r
  55                                 IntPtr.Zero,\r
  56                                 0,\r
  57                                 out cap,\r
  58                                 Marshal.SizeOf( typeof( CWin32.SYSTEM_POWER_CAPABILITIES ) )\r
  59                         );\r
  60                         if ( retval == 0 )\r
  61                         {\r
  62                                 Debug.WriteLine( "SYSTEM_POWER_CAPABILITIES.AOAC: " + cap.AoAc );\r
  63                                 if ( cap.AoAc )\r
  64                                 {\r
  65                                         Debug.WriteLine( "Connected Standby is enabled." );\r
  66                                         return true;\r
  67                                 }\r
  68                                 else\r
  69                                 {\r
  70                                         Debug.WriteLine( "Connected Standby is NOT enabled." );\r
  71                                         return false;\r
  72                                 }\r
  73                         }\r
  74                         else\r
  75                         {\r
  76                                 Debug.WriteLine( "CallNtPowerInformation returned: " + retval );\r
  77                                 //Debug.WriteLine( "Call to CallNTPowerInformation failed. GetLastError: %d\n", GetLastError() );\r
  78                                 return false;\r
  79                         }\r
  80                 }\r
  81 \r
  82                 public static void RestoreCurrentPowerPlan()\r
  83                 {\r
  84                         if ( bConnectedStandbySupported )\r
  85                         {\r
  86                                 // 何もしない\r
  87                         }\r
  88                         else\r
  89                         {\r
  90                                 if ( GuidBackup != System.Guid.Empty )\r
  91                                 {\r
  92                                         SetActivePowerPlan( GuidBackup );\r
  93                                         Trace.TraceInformation( "電源プランを、「{0}」に戻しました。", GetFriendlyName( GuidBackup ) );\r
  94                                         GuidBackup = System.Guid.Empty;\r
  95                                 }\r
  96                         }\r
  97                 }\r
  98                 public static void ChangeHighPerformance()\r
  99                 {\r
 100                         if ( bConnectedStandbySupported )\r
 101                         {\r
 102                                 Trace.TraceInformation( "ConnectedStandby対応機種のため、電源プランの変更を行いません。" );\r
 103                         }\r
 104                         else\r
 105                         {\r
 106                                 SetActivePowerPlan( GuidHighPerformance );\r
 107                                 Trace.TraceInformation( "電源プランを、「{0}」に変更しました。", GetFriendlyName( GuidHighPerformance ) );\r
 108                         }\r
 109                 }\r
 110 \r
 111 \r
 112 \r
 113                 private static void SetActivePowerPlan( Guid powerSchemeId )\r
 114                 {\r
 115                         var schemeGuid = powerSchemeId;\r
 116                         CWin32.PowerSetActiveScheme( IntPtr.Zero, ref schemeGuid );\r
 117                 }\r
 118 \r
 119                 private static Guid GetActivePowerPlan()\r
 120                 {\r
 121                         IntPtr pCurrentSchemeGuid = IntPtr.Zero;\r
 122                         CWin32.PowerGetActiveScheme( IntPtr.Zero, ref pCurrentSchemeGuid );\r
 123                         var currentSchemeGuid = (Guid) Marshal.PtrToStructure( pCurrentSchemeGuid, typeof( Guid ) );\r
 124                         return currentSchemeGuid;\r
 125                 }\r
 126 \r
 127 \r
 128                 private static IEnumerable<Guid> FindAll()\r
 129                 {\r
 130                         var schemeGuid = Guid.Empty;\r
 131                         uint sizeSchemeGuid = (uint) Marshal.SizeOf( typeof( Guid ) );\r
 132                         uint schemeIndex = 0;\r
 133                         while ( CWin32.PowerEnumerate( IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint) CWin32.AccessFlags.ACCESS_SCHEME,\r
 134                                 schemeIndex, ref schemeGuid, ref sizeSchemeGuid ) == 0 )\r
 135                         {\r
 136                                 yield return schemeGuid;\r
 137                                 schemeIndex++;\r
 138                         }\r
 139                 }\r
 140 \r
 141                 private static string GetFriendlyName( Guid schemeGuid )\r
 142                 {\r
 143                         uint sizeName = 1024;\r
 144                         IntPtr pSizeName = Marshal.AllocHGlobal( (int) sizeName );\r
 145                         string friendlyName;\r
 146 \r
 147                         try\r
 148                         {\r
 149                                 CWin32.PowerReadFriendlyName( IntPtr.Zero, ref schemeGuid, IntPtr.Zero, IntPtr.Zero, pSizeName, ref sizeName );\r
 150                                 friendlyName = Marshal.PtrToStringUni( pSizeName );\r
 151                         }\r
 152                         finally\r
 153                         {\r
 154                                 Marshal.FreeHGlobal( pSizeName );\r
 155                         }\r
 156                         return friendlyName;\r
 157                 }\r
 158         }\r
 159 }\r