// Copyright © 2019 The CefSharp Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
using System;
using System.Diagnostics;
using System.Threading.Tasks;
namespace CefSharp.Internals
{
///
/// Monitor the parent process and exit if the parent process closes
/// before the subprocess. This class is used by the CefSharp.BrowserSubprocess to
/// self terminate if the parent dies without notifying it to exit.
/// See https://github.com/cefsharp/CefSharp/issues/2359 for more information.
///
public static class ParentProcessMonitor
{
///
/// Starts a long running task (spawns new thread) used to monitor the parent process
/// and calls if the parent exits unexpectedly (usually result of a crash).
///
/// process Id of the parent application
public static void StartMonitorTask(int parentProcessId)
{
Task.Factory.StartNew(() => AwaitParentProcessExit(parentProcessId), TaskCreationOptions.LongRunning);
}
private static async void AwaitParentProcessExit(int parentProcessId)
{
try
{
var parentProcess = Process.GetProcessById(parentProcessId);
parentProcess.WaitForExit();
}
catch (Exception e)
{
//main process probably died already
Debug.WriteLine(e);
}
await Task.Delay(1000); //wait a bit before exiting
Debug.WriteLine("BrowserSubprocess shutting down forcibly.");
Process.GetCurrentProcess().Kill();
}
}
}