-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Matt Davies Sent: Tuesday, October 24, 2006 4:33 PM To: boost-users@lists.boost.org Subject: [Boost-users] Deferred Function calls
I am implementing a signal & slots implementation with a twist. Normally when a signal is fired the connected slots are called immediately. I will need to defer the actual calls to be invoked later. Basically I need to store the function reference (via pointer or functor) and the accompanying parameter values to a 'composite' object. This composite object will be stored on a buffer. Later another processor will pick this object of the buffer and then invoke the actual function call.
[Nat] Let me try to paraphrase the question to see if I understand. You aren't directly using Boost.Signals because when you call a signal it immediately passes control to each of its slots. Your slots have non-empty parameter signatures. The code that triggers the deferred call has matching argument values. If an immediate call were acceptable, you'd simply use a boost::signal and call it with those argument values. So... as Delfin Rojas suggested, you could use boost::bind to bind your boost::signal object with the argument values you later want passed to each connected slot. (I haven't tried this myself.) In the absence of bind placeholders (e.g. _1), bind will produce a nullary functor that you can store in a boost::function<void (void)>. When you later call that functor with no arguments, it should call each connected slot with the bound arguments. If this doesn't answer your question, please explain what we're missing.