boost-signals

I have application that may benefit from using one of boost's signals libraries over a homegrown solution. The application is multithreaded but the part that does the signal processing is single threaded. Is there any reason to prefer Boost.Signals2 over Boost.Signal if multithreading is not an issue? Boost.Signals is now deprecated, and Boost.Signals2 should be used instead (see v1.54 docs ) Originally, if all the signals and slots were in the same thread, boost.signals was just fine. However, it is no longer being maintained -- the documentation suggests using signals2 in all new code. 来源：

I am using the boost library and my question is about boost::signals. I have a signal that might call many different slots but only one slot will match the call so I want this particular slot to return true and that the calling will stop. Is it possible? Is it efficient? Can you guys suggest me a better way to do it if it's not efficient? After some research I've found that in boost documentation they write about Slots that return values . They suggest to use a different combiner like this: struct breakIfTrue { template<typename InputIterator> bool operator()(InputIterator first, InputIterator

I have the following situation, (better in code) class Foo { private: typedef boost::signal<void ()> Signal; Signal signal; public: void Register_SignalFunction(const Signal::slot_type& slot); void Unregister_SignalFunction(const Signal::slog_type& slot); } class OtherFoo { Foo foo; public: OtherFoo() { foo.Register_SignalFunction(&OnSignal) //I know I can't do this that is precisely my question. } void OnSignal(); //what to do when signal fires } So the question is, how i pass a 'member-function' pointer to the Register method. Also, is this ok? What I want/need, is some sort of delegate

Consider this: #include <boost/signals2.hpp> #include <iostream> struct object_with_slot { void operator()() { std::cout << "Slot called!" << std::endl; member = 50500; } int member; }; int main() { boost::signals2::signal<void ()> sig; object_with_slot * ptr = new object_with_slot; sig.connect(*ptr); delete ptr; sig(); } Output is "Slot called!" and no crash or anything. That's why I have a few questions: 1) Why there is no crash? 2) Why there is no crash even if the slot function assigns something to object which doesn't exist? 3) How can I make the signal automatically track the lifetime of

My system is having trouble building the boost libraries. I understand that most boost libraries are (fortunately) just headers that do not need to be build (with some exceptions). Does the boost :: signals2 library need to be built? Also is the boost.signals2 library dependant on the boost.signals library? Signals is not header-only, signals2 is. But however, signals2 is explicitly developed for thread-safety and if you use boost.thread, this has to be compiled. As far as I know signals2 is not dependent on signals headers. No, signals2 is header only. See here . 来源： https://stackoverflow.com

I'm trying to complete the boost::signal tutorial at http://www.boost.org/doc/libs/1_47_0/doc/html/signals/tutorial.html#id2850736 However Eclipse CDT shows parsing errors with whichever syntax I use I have #include <boost/signals.hpp> Preferred syntax boost::signal<void (float, float)> sig; sig.connect(&print_sum); Invalid template arguments at signal Method 'connect' could not be resolved Portable syntax boost::signal2<float, float, float> sig; sig.connect(&print_sum); Method 'connect' could not be resolved Symbol 'signal2' could not be resolved I use eclipse 3.7 It seems to be a CDT issue.