title: where the body of function uv_prepare_invoke, only find define in libuv
body: <p>I read the <code>libuv</code> sourcecode and found these function declarations:</p>
  
  <pre><code>void uv_prepare_invoke(uv_loop_t* loop);
  void uv_check_invoke(uv_loop_t* loop);
  void uv_idle_invoke(uv_loop_t* loop);
  </code></pre>
  
  <p>Defined in <a href="https://github.com/libuv/libuv/blob/v1.x/src/win/internal.h#L258-L260" rel="nofollow"><code>internal.h</code></a>.</p>
  
  <p>But I can't find the function bodies, why?</p>