private void SetPowerInformationBooleanValue(PowerInformationLevel level, bool value)
{
var inputBuffer = AllocateCoTaskBuffer <bool>(out var inputBufferSize);
var byteValue = value ? (byte)1 : (byte)0;
Marshal.WriteByte(inputBuffer, ofs: 0, val: byteValue);
try
{
var returnCode = PowrprofDllImport
.CallNtPowerInformation(
level,
inputBuffer,
(ulong)inputBufferSize,
IntPtr.Zero,
0);
EnsureWin32CallSucceeded(returnCode);
}
finally
{
Marshal.FreeCoTaskMem(inputBuffer);
}
}
public void PutMachineSleep()
{
PowrprofDllImport.SetSuspendState(
bHibernate: false,
bForce: false,
bWakeupEventsDisabled: false);
}
private T GetPowerInformationStructure <T>(PowerInformationLevel level)
where T : struct
{
var outputBuffer = AllocateCoTaskBuffer <T>(out var outputBufferSize);
try
{
var returnCode = PowrprofDllImport.CallNtPowerInformation(
level,
(IntPtr)null,
0,
outputBuffer,
(ulong)outputBufferSize);
EnsureWin32CallSucceeded(returnCode);
return(Marshal.PtrToStructure <T>(outputBuffer));
}
finally
{
Marshal.FreeCoTaskMem(outputBuffer);
}
}
private long GetPowerInformationInt64Value(PowerInformationLevel level)
{
var outputBuffer = AllocateCoTaskBuffer <long>(out var outputBufferSize);
try
{
// Result returned in count of 100 nanoseconds
var returnCode = PowrprofDllImport.CallNtPowerInformation(
level,
(IntPtr)null,
0,
outputBuffer,
(ulong)outputBufferSize);
EnsureWin32CallSucceeded(returnCode);
return(Marshal.ReadInt64(outputBuffer, 0));
}
finally
{
Marshal.FreeCoTaskMem(outputBuffer);
}
}
