/// <devdoc>
/// Make sure we are watching for a process exit.
/// </devdoc>
/// <internalonly/>
private void EnsureWatchingForExit()
{
if (!_watchingForExit)
{
lock (this)
{
if (!_watchingForExit)
{
Debug.Assert(_haveProcessHandle, "Process.EnsureWatchingForExit called with no process handle");
Debug.Assert(Associated, "Process.EnsureWatchingForExit called with no associated process");
_watchingForExit = true;
try
{
_waitHandle = new ProcessWaitHandle(GetWaitState());
_registeredWaitHandle = ThreadPool.RegisterWaitForSingleObject(_waitHandle,
new WaitOrTimerCallback(CompletionCallback), _waitHandle, -1, true);
}
catch
{
_waitHandle?.Dispose();
_waitHandle = null;
_watchingForExit = false;
throw;
}
}
}
}
}
