private static void ThrowWhenFailed(NativeMethods.ExecutionStates previousState)
{
if (previousState == 0)
{
throw new Exception("Failed to suppress/restore system power management.");
}
}
/// <summary>
/// Prevents the system to enter any of the sleep states on idle.
/// </summary>
/// <remarks>
/// This includes dimming and deactivation of display device. Does not affect activation of screen saver.
/// </remarks>
public static void Disable()
{
const NativeMethods.ExecutionStates flags = NativeMethods.ExecutionStates.Continuous | NativeMethods.ExecutionStates.SystemRequired |
NativeMethods.ExecutionStates.DisplayRequired;
NativeMethods.ExecutionStates previousState = NativeMethods.SetThreadExecutionState(flags);
ThrowWhenFailed(previousState);
}
/// <summary>
/// Resets system idle timers and enables power management to function as configured in Windows.
/// </summary>
public static void Restore()
{
NativeMethods.ExecutionStates previousState = NativeMethods.SetThreadExecutionState(NativeMethods.ExecutionStates.Continuous);
ThrowWhenFailed(previousState);
}