title: Is the thread created by ctypes also under GIL in python?
body: <p>All python thread(in CPython) are under GIL.</p>
  
  <p>What if the thread is created by <code>ctypes</code>?</p>
  
  <p>For example, python just calls the below function through <code>C Library</code> and the function create a thread in <code>C</code> area not python.</p>
  
  <pre><code>#include&lt;thread&gt;
  int createUnitTestThread(int sasAddr){  
      sasEngine-&gt;thread = new std::thread(....);
      return 0;
  }
  </code></pre>
  
  <p>Is it the same or not ?</p>