imes of all
  objects involved.</p>
<p>When signals are connected to multiple slots, there is a
  question regarding the relationship between the return values of the
  slots and the return value of the signals. Boost.Signals2 allows the
  user to specify the manner in which multiple return values are
  combined.</p>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="idp161457968"></a>Signals2</h3></div></div></div>
<p>This documentation describes a thread-safe variant of the