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