internal static PowerManagementNativeMethods.SystemBatteryState GetSystemBatteryState()
{
IntPtr status = IntPtr.Zero;
PowerManagementNativeMethods.SystemBatteryState batt_status;
try
{
status = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemBatteryState)));
uint retval = PowerManagementNativeMethods.CallNtPowerInformation(
5, // SystemBatteryState
(IntPtr)null,
0,
status,
(UInt32)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemBatteryState))
);
if (retval == CoreNativeMethods.STATUS_ACCESS_DENIED)
{
throw new UnauthorizedAccessException("The caller had insufficient access rights to get the system battery state.");
}
batt_status = (PowerManagementNativeMethods.SystemBatteryState)Marshal.PtrToStructure(status, typeof(PowerManagementNativeMethods.SystemBatteryState));
}
finally
{
Marshal.FreeCoTaskMem(status);
}
return(batt_status);
}
GetSystemPowerCapabilities()
{
IntPtr status = IntPtr.Zero;
PowerManagementNativeMethods.SystemPowerCapabilities powerCap;
try
{
status = Marshal.AllocCoTaskMem(
Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemPowerCapabilities)));
uint retval = PowerManagementNativeMethods.CallNtPowerInformation(
4, // SystemPowerCapabilities
(IntPtr)null,
0,
status,
(UInt32)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemPowerCapabilities))
);
if (retval == CoreNativeMethods.STATUS_ACCESS_DENIED)
{
throw new UnauthorizedAccessException("The caller had insufficient access rights to get the system power capabilities.");
}
powerCap = (PowerManagementNativeMethods.SystemPowerCapabilities)Marshal.PtrToStructure(status, typeof(PowerManagementNativeMethods.SystemPowerCapabilities));
}
finally
{
Marshal.FreeCoTaskMem(status);
}
return(powerCap);
}
/// <summary>Registers the application to receive power setting notifications for the specific power setting event.</summary>
/// <param name="handle">Handle indicating where the power setting notifications are to be sent.</param>
/// <param name="powerSetting">The GUID of the power setting for which notifications are to be sent.</param>
/// <returns>Returns a notification handle for unregistering power notifications.</returns>
internal static int RegisterPowerSettingNotification(IntPtr handle, Guid powerSetting)
{
var outHandle = PowerManagementNativeMethods.RegisterPowerSettingNotification(
handle,
ref powerSetting,
0);
return(outHandle);
}
/// <summary>
/// Allows an application to inform the system that it
/// is in use, thereby preventing the system from entering
/// the sleeping power state or turning off the display
/// while the application is running.
/// </summary>
/// <param name="executionStateOptions">The thread's execution requirements.</param>
/// <exception cref="Win32Exception">Thrown if the SetThreadExecutionState call fails.</exception>
public static void SetThreadExecutionState(ExecutionStates executionStateOptions)
{
ExecutionStates ret = PowerManagementNativeMethods.SetThreadExecutionState(executionStateOptions);
if (ret == ExecutionStates.None)
{
throw new Win32Exception(LocalizedMessages.PowerExecutionStateFailed);
}
}
/// <summary>
/// Allows an application to inform the system that it
/// is in use, thereby preventing the system from entering
/// the sleeping power state or turning off the display
/// while the application is running.
/// </summary>
/// <param name="flags">The thread's execution requirements.</param>
/// <exception cref="Win32Exception">Thrown if the SetThreadExecutionState call fails.</exception>
internal static void SetThreadExecutionState(ExecutionState flags)
{
ExecutionState?ret = PowerManagementNativeMethods.SetThreadExecutionState(flags);
if (ret == null)
{
throw new Win32Exception("SetThreadExecutionState call failed.");
}
}
internal static PowerManagementNativeMethods.SystemBatteryState GetSystemBatteryState()
{
if (PowerManagementNativeMethods.CallNtPowerInformation(
PowerManagementNativeMethods.PowerInformationLevel.SystemBatteryState,
IntPtr.Zero, 0, out PowerManagementNativeMethods.SystemBatteryState batteryState,
(uint)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemBatteryState))
) == NativeAPI.Consts.Common.StatusAccessDenied)
{
throw new UnauthorizedAccessException(LocalizedMessages.PowerInsufficientAccessBatteryState);
}
return(batteryState);
}
GetSystemPowerCapabilities()
{
if (PowerManagementNativeMethods.CallNtPowerInformation(
PowerManagementNativeMethods.PowerInformationLevel.SystemPowerCapabilities,
IntPtr.Zero, 0, out PowerManagementNativeMethods.SystemPowerCapabilities powerCap,
(uint)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemPowerCapabilities))
) == NativeAPI.Consts.Common.StatusAccessDenied)
{
throw new UnauthorizedAccessException(LocalizedMessages.PowerInsufficientAccessCapabilities);
}
return(powerCap);
}
internal static PowerManagementNativeMethods.SystemPowerCapabilities GetSystemPowerCapabilities()
{
var retval = PowerManagementNativeMethods.CallNtPowerInformation(
PowerManagementNativeMethods.PowerInformationLevel.SystemPowerCapabilities,
IntPtr.Zero, 0, out PowerManagementNativeMethods.SystemPowerCapabilities powerCap,
(uint)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemPowerCapabilities))
);
if (retval == CoreNativeMethods.StatusAccessDenied)
{
throw new UnauthorizedAccessException(LocalizedMessages.PowerInsufficientAccessCapabilities);
}
return(powerCap);
}
internal static PowerManagementNativeMethods.SystemBatteryState GetSystemBatteryState()
{
PowerManagementNativeMethods.SystemBatteryState batteryState;
uint retval = PowerManagementNativeMethods.CallNtPowerInformation(
PowerManagementNativeMethods.PowerInformationLevel.SystemBatteryState,
IntPtr.Zero, 0, out batteryState,
(UInt32)Marshal.SizeOf(typeof(PowerManagementNativeMethods.SystemBatteryState))
);
if (retval == CoreNativeMethods.StatusAccessDenied)
{
throw new UnauthorizedAccessException(LocalizedMessages.PowerInsufficientAccessBatteryState);
}
return(batteryState);
}
/// <summary> /// Registers the application to receive power setting notifications /// for the specific power setting event. /// </summary> /// <param name="handle">Handle indicating where the power setting /// notifications are to be sent.</param> /// <param name="powerSetting">The GUID of the power setting for /// which notifications are to be sent.</param> /// <returns>Returns a notification handle for unregistering /// power notifications.</returns> internal static int RegisterPowerSettingNotification(IntPtr handle, Guid powerSetting) => PowerManagementNativeMethods.RegisterPowerSettingNotification(handle, ref powerSetting, 0);
