private T GetStructure <T>(PowerInformationLevel informationLevel)
{
IntPtr lpInBuffer = IntPtr.Zero;
int inputBufSize = 0;
int outputPtrSize = _marshal.SizeOf <T>();
IntPtr outputPtr = _marshal.AllocateMemory(size: outputPtrSize);
PointerResult result = _powerManagementInterop.CallNtPowerInformation(
informationLevel: informationLevel,
inputBuffer: lpInBuffer,
inputBufSize: inputBufSize,
outputBuffer: outputPtr,
outputBufferSize: outputPtrSize);
_marshal.ReleasePointer(lpInBuffer);
if (result.IsSuccessful)
{
T properties = _marshal.ToProperties <T>(outputPtr);
_marshal.ReleasePointer(outputPtr);
return(properties);
}
else
{
_marshal.ReleasePointer(outputPtr);
throw new Win32Exception();
}
}
private PointerResult HibernateFileAction(HibernateFileAction fileAction)
{
int intSize = _marshal.SizeOf <bool>();
IntPtr pointer = _marshal.AllocateMemory(intSize);
_marshal.WriteBytes(pointer, fileAction);
const int outputBufferSize = 0;
PointerResult result = _powerManagementInterop.CallNtPowerInformation(
informationLevel: PowerInformationLevel.SystemReserveHiberFile,
inputBuffer: pointer,
inputBufSize: intSize,
outputBuffer: IntPtr.Zero,
outputBufferSize: outputBufferSize);
_marshal.ReleasePointer(pointer);
return(result);
}