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From: C Facchini <c.facch...@gmail.com>
Date: Wed, 16 Sep 2009 10:05:41 -0700 (PDT)
Local: Wed, Sep 16 2009 1:05 pm
Subject: Re: On callbacks
> I'm waiting for a bunch of tests to finish so I have some time to go into
The greatest gift ever :)
> this now, so you get a bunch of words for free :-) > Hope this is all starting to make sense.
Actually, yes. The mechanisms behind all this are clearer now.
> > What I would like to achieve is to have all the ascii traces dumped
If I got it correctly, I should do something like:
> > into a unique file. > > So, by looking at how EnableAscii is implemented, I thought what I > > need was 'MakeBoundCallback'. However it is not clear to me how to > > build the callback (in particular, different files show different > > implementations, e.g. CsmaHelper::AsciiRxEvent in src/helper/csma- > > helper.cc and TxCallback in stats/wifi-example-sim.cc). > Can you see a way to get this done now?
// 1) defining the specialized callback
}
int
main (int argc, char *argv[]) { // 2) making such a bound callback std::ofstream ascii; ascii.open ("adhoc-transfer.tr"); Config::ConnectWithoutContext ("/NodeList/0/$ns3::TcpL4Protocol/ SocketList/0/CongestionWindow", MakeBoundCallback (&CwndChangeAscii, ascii)); }
Still, it doesn't compile. There are some errors regarding the type
passed. And there are also errors regarding the callback: /usr/include/c++/4.3/bits/ios_base.h: In copy constructor ‘std::basic_ios<char, std::char_traits<char> >::basic_ios(const std::basic_ios<char, std::char_traits<char> >&)’: /usr/include/c++/4.3/bits/ios_base.h:782: error: ‘std::ios_base::ios_base(const std::ios_base&)’ is private /usr/include/c++/4.3/iosfwd:52: error: within this context /usr/include/c++/4.3/iosfwd: In copy constructor ‘std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream (const std::basic_ofstream<char, std::char_traits<char> >&)’: /usr/include/c++/4.3/iosfwd:89: note: synthesized method ‘std::basic_ios<char, std::char_traits<char> >::basic_ios(const std::basic_ios<char, std::char_traits<char> >&)’ first required here /usr/include/c++/4.3/streambuf: In copy constructor ‘std::basic_filebuf<char, std::char_traits<char> >::basic_filebuf (const std::basic_filebuf<char, std::char_traits<char> >&)’: /usr/include/c++/4.3/streambuf:775: error: ‘std::basic_streambuf<_CharT, _Traits>::basic_streambuf(const std::basic_streambuf<_CharT, _Traits>&) [with _CharT = char, _Traits = std::char_traits<char>]’ is private /usr/include/c++/4.3/iosfwd:83: error: within this context /usr/include/c++/4.3/iosfwd: In copy constructor ‘std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream (const std::basic_ofstream<char, std::char_traits<char> >&)’: /usr/include/c++/4.3/iosfwd:89: note: synthesized method ‘std::basic_filebuf<char, std::char_traits<char> >::basic_filebuf (const std::basic_filebuf<char, std::char_traits<char> >&)’ first required here ../scratch/adhoc_multihop_app.cc: In function ‘int main(int, char**)’: ../scratch/adhoc_multihop_app.cc:239: note: synthesized method ‘std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream (const std::basic_ofstream<char, std::char_traits<char> >&)’ first required here ../scratch/adhoc_multihop_app.cc:239: error: initializing argument 2 of ‘ns3::Callback<R, T1, T2, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty> ns3::MakeBoundCallback (R (*)(TX, T1, T2), ARG) [with R = void, TX = uint32_t, ARG = std::basic_ofstream<char, std::char_traits<char> >, T1 = uint32_t, T2 = std::ofstream&]’ debug/ns3/callback.h: In constructor ‘ns3::BoundFunctorCallbackImpl<T, R, TX, T1, T2, T3, T4, T5, T6, T7, T8>::BoundFunctorCallbackImpl (FUNCTOR, ARG) [with FUNCTOR = void (*)(unsigned int, unsigned int, std::ofstream&), ARG = std::basic_ofstream<char, std::char_traits<char> >, T = void (*)(unsigned int, unsigned int, std::ofstream&), R = void, TX = unsigned int, T1 = unsigned int, T2 = std::ofstream&, T3 = ns3::empty, T4 = ns3::empty, T5 = ns3::empty, T6 = ns3::empty, T7 = ns3::empty, T8 = ns3::empty]’: debug/ns3/ptr.h:243: instantiated from ‘ns3::Ptr<T> ns3::Create(T1, T2) [with T = ns3::BoundFunctorCallbackImpl<void (*)(unsigned int, unsigned int, std::ofstream&), void, unsigned int, unsigned int, std::ofstream&, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty>, T1 = void (*)(unsigned int, unsigned int, std::ofstream&), T2 = std::basic_ofstream<char, std::char_traits<char> >]’
debug/ns3/callback.h:925: instantiated from ‘ns3::Callback<R, T1,
T2, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty> ns3::MakeBoundCallback(R (*)(TX, T1, T2), ARG) [with R = void, TX = uint32_t, ARG = std::basic_ofstream<char, std::char_traits<char> >, T1 = uint32_t, T2 = std::ofstream&]’ ../scratch/adhoc_multihop_app.cc:239: instantiated from here debug/ns3/callback.h:287: error: invalid conversion from ‘void*’ to ‘unsigned int’ The same happens if I pass, say, a class instance.
The complete source can be found here: http://pastebin.com/m2c6f2be6
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