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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="Win32.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// Win32 API calls
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrake.ApplicationServices.Utilities
{
using System;
using System.Runtime.InteropServices;
using System.Windows.Threading;
/// <summary>
/// Win32 API calls
/// </summary>
public class Win32
{
/// <summary>
/// Used to force UI Thread.
/// </summary>
private static Action<Action> executor = action => action();
/// <summary>
/// Set the Forground Window
/// </summary>
/// <param name="hWnd">
/// The h wnd.
/// </param>
/// <returns>
/// A Boolean true when complete.
/// </returns>
[DllImport("user32.dll")]
public static extern bool SetForegroundWindow(int hWnd);
/// <summary>
/// Lock the workstation
/// </summary>
[DllImport("user32.dll")]
public static extern void LockWorkStation();
/// <summary>
/// Exit Windows
/// </summary>
/// <param name="uFlags">
/// The u flags.
/// </param>
/// <param name="dwReason">
/// The dw reason.
/// </param>
/// <returns>
/// an integer
/// </returns>
[DllImport("user32.dll")]
public static extern int ExitWindowsEx(int uFlags, int dwReason);
/// <summary>
/// Memory Status EX Struct
/// </summary>
public struct MEMORYSTATUSEX
{
public int dwLength;
public int dwMemoryLoad;
public ulong ullTotalPhys;
public ulong ullAvailPhys;
public ulong ullTotalPageFile;
public ulong ullAvailPageFile;
public ulong ullTotalVirtual;
public ulong ullAvailVirtual;
public ulong ullAvailExtendedVirtual;
}
/// <summary>
/// Get the System Memory information
/// </summary>
/// <param name="lpBuffer">
/// The lp buffer.
/// </param>
/// <returns>
/// A boolean.
/// </returns>
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool GlobalMemoryStatusEx(ref MEMORYSTATUSEX lpBuffer);
/// <summary>
/// Generate a Console Ctrl Event
/// </summary>
/// <param name="sigevent">
/// The sigevent.
/// </param>
/// <param name="dwProcessGroupId">
/// The dw process group id.
/// </param>
/// <returns>
/// Bool true is sucess
/// </returns>
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool GenerateConsoleCtrlEvent(ConsoleCtrlEvent sigevent, int dwProcessGroupId);
/// <summary>
/// Console Ctrl Event
/// </summary>
public enum ConsoleCtrlEvent
{
/// <summary>
/// Ctrl - C
/// </summary>
CTRL_C = 0,
/// <summary>
/// Ctrl - Break
/// </summary>
CTRL_BREAK = 1,
/// <summary>
/// Ctrl - Close
/// </summary>
CTRL_CLOSE = 2,
}
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);
/// <summary>
/// Execution State
/// </summary>
[Flags]
public enum EXECUTION_STATE : uint
{
ES_SYSTEM_REQUIRED = 0x00000001,
ES_CONTINUOUS = 0x80000000,
ES_AWAYMODE_REQUIRED = 0x00000040
}
/// <summary>
/// Initializes static members of the <see cref="Win32"/> class.
/// </summary>
static Win32()
{
InitializeWithDispatcher();
}
/// <summary>
/// Prevent the system from sleeping
/// </summary>
public static void PreventSleep()
{
executor(
() => SetThreadExecutionState(
EXECUTION_STATE.ES_CONTINUOUS | EXECUTION_STATE.ES_SYSTEM_REQUIRED
| EXECUTION_STATE.ES_AWAYMODE_REQUIRED));
}
/// <summary>
/// Allow the system to sleep.
/// </summary>
public static void AllowSleep()
{
executor(
() => SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS));
}
/// <summary>
/// Initializes the framework using the current dispatcher.
/// </summary>
public static void InitializeWithDispatcher()
{
var dispatcher = Dispatcher.CurrentDispatcher;
SetUIThreadMarshaller(action =>
{
if (dispatcher.CheckAccess())
action();
else dispatcher.Invoke(action);
});
}
/// <summary>
/// Sets a custom UI thread marshaller.
/// </summary>
/// <param name="marshaller">The marshaller.</param>
public static void SetUIThreadMarshaller(Action<Action> marshaller)
{
executor = marshaller;
}
}
}
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