[Boost-users] [boost.signals2] queries

Hi: I am looking in to using boost.signals2 for a project I'm involved in, but have a few queries: Firstly, if I create a global signall: boost::signals2::signal<void ()> sig; and then a structure: struct DoWork { void operator()() const { //work. } If I then create a private member of a class: DoWork work; And then do: Sig.connect(Work); Will the connection happen on the thread in which the work member variable was defined or will a second thread be utilized? Also given that sig will be a global and hence accessed from multiple threads, do I need a mutex? Cheers Sean.