54 lines
1.9 KiB
C#
54 lines
1.9 KiB
C#
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
|
|
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
// Copyright (C) LibreHardwareMonitor and Contributors.
|
|
// All Rights Reserved.
|
|
|
|
using System.Runtime.InteropServices;
|
|
|
|
// ReSharper disable InconsistentNaming
|
|
|
|
namespace LibreHardwareMonitor.Interop;
|
|
|
|
internal class NtDll
|
|
{
|
|
private const string DllName = "ntdll.dll";
|
|
|
|
[StructLayout(LayoutKind.Sequential)]
|
|
internal struct SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION
|
|
{
|
|
public long IdleTime;
|
|
public long KernelTime;
|
|
public long UserTime;
|
|
public long DpcTime;
|
|
public long InterruptTime;
|
|
public uint InterruptCount;
|
|
}
|
|
|
|
[StructLayout(LayoutKind.Sequential)]
|
|
internal struct SYSTEM_PROCESSOR_IDLE_INFORMATION
|
|
{
|
|
public long IdleTime;
|
|
public long C1Time;
|
|
public long C2Time;
|
|
public long C3Time;
|
|
public uint C1Transitions;
|
|
public uint C2Transitions;
|
|
public uint C3Transitions;
|
|
public uint Padding;
|
|
}
|
|
|
|
internal enum SYSTEM_INFORMATION_CLASS
|
|
{
|
|
SystemProcessorPerformanceInformation = 8,
|
|
SystemProcessorIdleInformation = 42
|
|
}
|
|
|
|
[DllImport(DllName)]
|
|
[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
|
|
internal static extern int NtQuerySystemInformation(SYSTEM_INFORMATION_CLASS SystemInformationClass, [Out] SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION[] SystemInformation, int SystemInformationLength, out int ReturnLength);
|
|
|
|
[DllImport(DllName)]
|
|
[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
|
|
internal static extern int NtQuerySystemInformation(SYSTEM_INFORMATION_CLASS SystemInformationClass, [Out] SYSTEM_PROCESSOR_IDLE_INFORMATION[] SystemInformation, int SystemInformationLength, out int ReturnLength);
|
|
}
|