mirror-processhacker/trunk/ProcessHacker/Components/RestartRecoveryLib/RestartRecoveryInterop.cs

using System.Runtime.InteropServices;
using ProcessHacker.Native.Api;
using System.Security;
using System;

namespace ProcessHackerRestartRecovery
{
    [SuppressUnmanagedCodeSecurity]
    internal static class AppRestartRecoveryNativeMethods
    {
        #region Application Restart and Recovery Definitions

        internal delegate UInt32 InternalRecoveryCallback(IntPtr state); 
        
        internal static InternalRecoveryCallback internalCallback;

        static AppRestartRecoveryNativeMethods()
        {
            internalCallback = new InternalRecoveryCallback(InternalRecoveryHandler);
        }

        private static UInt32 InternalRecoveryHandler(IntPtr parameter)
        {
            bool cancelled = false;
            ApplicationRecoveryInProgress(out cancelled);

            GCHandle handle = GCHandle.FromIntPtr(parameter);
            RecoveryData data = handle.Target as RecoveryData;
            data.Invoke();
            handle.Free();

            return 0;
        }

        [DllImport("kernel32.dll")]
        internal static extern void ApplicationRecoveryFinished(
           [MarshalAs(UnmanagedType.Bool)] 
            bool success
            );

        [DllImport("kernel32.dll")]
        [PreserveSig]
        internal static extern HResult ApplicationRecoveryInProgress(
            [Out, MarshalAs(UnmanagedType.Bool)] 
            out bool canceled
            );

        [DllImport("kernel32.dll")]
        [PreserveSig]
        internal static extern HResult GetApplicationRecoveryCallback(
            IntPtr processHandle,
            out RecoveryCallback recoveryCallback,
            out object state,
            out uint pingInterval,
            out uint flags
            );

        [DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
        [PreserveSig]
        internal static extern HResult RegisterApplicationRecoveryCallback(
            InternalRecoveryCallback callback, IntPtr param,
            uint pingInterval,
            uint flags //Unused
            );


        [DllImport("kernel32.dll")]
        [PreserveSig]
        internal static extern HResult RegisterApplicationRestart(
            [MarshalAs(UnmanagedType.BStr)] 
            string commandLineArgs,
            RestartRestrictions flags
            );

        [DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        [PreserveSig]
        internal static extern HResult GetApplicationRestartSettings(
            IntPtr process,
            IntPtr commandLine,
            ref uint size,
            out RestartRestrictions flags
            );

        [DllImport("kernel32.dll")]
        [PreserveSig]
        internal static extern HResult UnregisterApplicationRecoveryCallback();

        [DllImport("kernel32.dll")]
        [PreserveSig]
        internal static extern HResult UnregisterApplicationRestart();

        #endregion
    }

    /// <summary>
    /// Specifies the conditions when Windows Error Reporting
    /// should not restart an application that has registered
    /// for automatic restart.
    /// </summary>
    [Flags]
    public enum RestartRestrictions
    {
        /// <summary>
        /// Always restart the application.
        /// </summary>
        None = 0,
        /// <summary>
        /// Do not restart when the application has crashed.
        /// </summary>
        NotOnCrash = 1,
        /// <summary>
        /// Do not restart when the application is hung.
        /// </summary>
        NotOnHang = 2,
        /// <summary>
        /// Do not restart when the application is terminated
        /// due to a system update.
        /// </summary>
        NotOnPatch = 4,
        /// <summary>
        /// Do not restart when the application is terminated 
        /// because of a system reboot.
        /// </summary>
        NotOnReboot = 8
    }
}