升壓計時器綁定

Question

我想設置一個使用boost庫的計時器。

基本上，這是我寫的：

class ContactList { 
public: 
    ContactList(); 
    virtual ~ContactList(); 
    int Start(); 
    int readFromFile(); 
    int dumpList(); 
    void checkContacts(const boost::system::error_code& error); 
    void initializeTimer(); 

private: 
    std::list<Contact*> CList; 
    boost::asio::deadline_timer dt; 
    boost::asio::io_service ios; 
}; 

int ContactList::Start(){ 
... 
this->initializeTimer(); 
} 

void ContactList::checkContacts(const boost::system::error_code& error){ 
    std::cout<<"__Here we go!"<<std::endl; 
    ios.reset(); 
    initializeTimer(); 
} 

void ContactList::initializeTimer(){ 
    dt.expires_from_now(boost::posix_time::seconds(4)); 
    dt.async_wait(boost::bind(&ContactList::checkContacts, this, boost::asio::placeholders::error)); 
    ios.run(); 
} 

和編譯器抱怨了很多，他說：

g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"kad/ContactList.d" -MT"kad/ContactList.d" -o"kad/ContactList.o" "../kad/ContactList.cpp" 
../kad/ContactList.cpp: In constructor ‘kad::ContactList::ContactList()’: 
../kad/ContactList.cpp:12: error: no matching function for call to ‘boost::asio::basic_deadline_timer<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> > >::basic_deadline_timer()’ 
/usr/include/boost/asio/basic_deadline_timer.hpp:177: note: candidates are: boost::asio::basic_deadline_timer<Time, TimeTraits, TimerService>::basic_deadline_timer(boost::asio::io_service&, const typename TimeTraits::duration_type&) [with Time = boost::posix_time::ptime, TimeTraits = boost::asio::time_traits<boost::posix_time::ptime>, TimerService = boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >] 
/usr/include/boost/asio/basic_deadline_timer.hpp:158: note:     boost::asio::basic_deadline_timer<Time, TimeTraits, TimerService>::basic_deadline_timer(boost::asio::io_service&, const typename TimeTraits::time_type&) [with Time = boost::posix_time::ptime, TimeTraits = boost::asio::time_traits<boost::posix_time::ptime>, TimerService = boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >] 
/usr/include/boost/asio/basic_deadline_timer.hpp:142: note:     boost::asio::basic_deadline_timer<Time, TimeTraits, TimerService>::basic_deadline_timer(boost::asio::io_service&) [with Time = boost::posix_time::ptime, TimeTraits = boost::asio::time_traits<boost::posix_time::ptime>, TimerService = boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >] 
/usr/include/boost/asio/basic_deadline_timer.hpp:122: note:     boost::asio::basic_deadline_timer<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> > >::basic_deadline_timer(const boost::asio::basic_deadline_timer<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> > >&) 
/usr/include/boost/mem_fn.hpp: In member function ‘R& boost::_mfi::dm<R, T>::operator()(T*) const [with R = void()(const boost::system::error_code&), T = kad::ContactList]’: 
/usr/include/boost/bind.hpp:222: instantiated from ‘R boost::_bi::list1<A1>::operator()(boost::_bi::type<R>, F&, A&, long int) [with R = void (&)(const boost::system::error_code&), F = boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, A = boost::_bi::list1<boost::system::error_code&>, A1 = boost::_bi::value<kad::ContactList*>]’ 
/usr/include/boost/bind/bind_template.hpp:32: instantiated from ‘typename boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F, L>::operator()(A1&) [with A1 = boost::system::error_code, R = void (&)(const boost::system::error_code&), F = boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, L = boost::_bi::list1<boost::_bi::value<kad::ContactList*> >]’ 
/usr/include/boost/asio/detail/bind_handler.hpp:39: instantiated from ‘void boost::asio::detail::binder1<Handler, Arg1>::operator()() [with Handler = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, Arg1 = boost::system::error_code]’ 
/usr/include/boost/asio/handler_invoke_hook.hpp:63: instantiated from ‘void boost::asio::asio_handler_invoke(Function, ...) [with Function = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>]’ 
/usr/include/boost/asio/detail/handler_invoke_helpers.hpp:39: instantiated from ‘void boost_asio_handler_invoke_helpers::invoke(const Function&, Context*) [with Function = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>, Context = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >]’ 
/usr/include/boost/asio/detail/bind_handler.hpp:72: instantiated from ‘void boost::asio::detail::asio_handler_invoke(const Function&, boost::asio::detail::binder1<Handler, Arg1>*) [with Function = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>, Handler = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, Arg1 = boost::system::error_code]’ 
/usr/include/boost/asio/detail/handler_invoke_helpers.hpp:39: instantiated from ‘void boost_asio_handler_invoke_helpers::invoke(const Function&, Context*) [with Function = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>, Context = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>]’ 
/usr/include/boost/asio/detail/handler_queue.hpp:192: instantiated from ‘static void boost::asio::detail::handler_queue::handler_wrapper<Handler>::do_call(boost::asio::detail::handler_queue::handler*) [with Handler = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>]’ 
/usr/include/boost/asio/detail/handler_queue.hpp:172: instantiated from ‘boost::asio::detail::handler_queue::handler_wrapper<Handler>::handler_wrapper(Handler) [with Handler = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>]’ 
/usr/include/boost/asio/detail/handler_alloc_helpers.hpp:138: instantiated from ‘boost::asio::detail::handler_ptr<Alloc_Traits>::handler_ptr(boost::asio::detail::raw_handler_ptr<Alloc_Traits>&, Arg1&) [with Arg1 = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>, Alloc_Traits = boost::asio::detail::handler_alloc_traits<boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>, boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code> > >]’ 
/usr/include/boost/asio/detail/handler_queue.hpp:117: instantiated from ‘static boost::asio::detail::handler_queue::handler* boost::asio::detail::handler_queue::wrap(Handler) [with Handler = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>]’ 
/usr/include/boost/asio/detail/task_io_service.hpp:190: instantiated from ‘void boost::asio::detail::task_io_service<Task>::post(Handler) [with Handler = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>, Task = boost::asio::detail::epoll_reactor<false>]’ 
/usr/include/boost/asio/impl/io_service.ipp:126: instantiated from ‘void boost::asio::io_service::post(Handler) [with CompletionHandler = boost::asio::detail::binder1<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, boost::system::error_code>]’ 
/usr/include/boost/asio/detail/deadline_timer_service.hpp:172: instantiated from ‘void boost::asio::detail::deadline_timer_service<Time_Traits, Timer_Scheduler>::wait_handler<Handler>::operator()(const boost::system::error_code&) [with Handler = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, Time_Traits = boost::asio::time_traits<boost::posix_time::ptime>, Timer_Scheduler = boost::asio::detail::epoll_reactor<false>]’ 
/usr/include/boost/asio/detail/timer_queue.hpp:299: instantiated from ‘static void boost::asio::detail::timer_queue<Time_Traits>::timer<Handler>::complete_handler(boost::asio::detail::timer_queue<Time_Traits>::timer_base*, const boost::system::error_code&) [with Handler = boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > > >, Time_Traits = boost::asio::time_traits<boost::posix_time::ptime>]’ 
/usr/include/boost/asio/detail/timer_queue.hpp:276: instantiated from ‘boost::asio::detail::timer_queue<Time_Traits>::timer<Handler>::timer(const typename Time_Traits::time_type&, Handler, void*) [with Handler = boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > > >, Time_Traits = boost::asio::time_traits<boost::posix_time::ptime>]’ 
/usr/include/boost/asio/detail/timer_queue.hpp:71: instantiated from ‘bool boost::asio::detail::timer_queue<Time_Traits>::enqueue_timer(const typename Time_Traits::time_type&, Handler, void*) [with Handler = boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > > >, Time_Traits = boost::asio::time_traits<boost::posix_time::ptime>]’ 
/usr/include/boost/asio/detail/epoll_reactor.hpp:414: instantiated from ‘void boost::asio::detail::epoll_reactor<Own_Thread>::schedule_timer(boost::asio::detail::timer_queue<Time_Traits>&, const typename Time_Traits::time_type&, Handler, void*) [with Time_Traits = boost::asio::time_traits<boost::posix_time::ptime>, Handler = boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > > >, bool Own_Thread = false]’ 
/usr/include/boost/asio/detail/deadline_timer_service.hpp:185: instantiated from ‘void boost::asio::detail::deadline_timer_service<Time_Traits, Timer_Scheduler>::async_wait(boost::asio::detail::deadline_timer_service<Time_Traits, Timer_Scheduler>::implementation_type&, Handler) [with Handler = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, Time_Traits = boost::asio::time_traits<boost::posix_time::ptime>, Timer_Scheduler = boost::asio::detail::epoll_reactor<false>]’ 
/usr/include/boost/asio/deadline_timer_service.hpp:157: instantiated from ‘void boost::asio::deadline_timer_service<TimeType, TimeTraits>::async_wait(typename boost::asio::detail::deadline_timer_service<TimeTraits, boost::asio::detail::epoll_reactor<false> >::implementation_type&, WaitHandler) [with WaitHandler = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, TimeType = boost::posix_time::ptime, TimeTraits = boost::asio::time_traits<boost::posix_time::ptime>]’ 
/usr/include/boost/asio/basic_deadline_timer.hpp:374: instantiated from ‘void boost::asio::basic_deadline_timer<Time, TimeTraits, TimerService>::async_wait(WaitHandler) [with WaitHandler = boost::_bi::bind_t<void (&)(const boost::system::error_code&), boost::_mfi::dm<void()(const boost::system::error_code&), kad::ContactList>, boost::_bi::list1<boost::_bi::value<kad::ContactList*> > >, Time = boost::posix_time::ptime, TimeTraits = boost::asio::time_traits<boost::posix_time::ptime>, TimerService = boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >]’ 
../kad/ContactList.cpp:96: instantiated from here 
/usr/include/boost/mem_fn.hpp:342: error: invalid use of non-static member function 
make: *** [kad/ContactList.o] Error 1 

我真的很感激任何幫助或建議。 在此先感謝

Answer 1

我懷疑編譯器正在嘗試（和失敗）告訴你問題與您的構造函數。你沒有包括它的代碼，但我猜你不會初始化deadline_timer會員dt。也許你做這樣的事情：

ContactList::ContactList() 
{ 
} 

的問題是，該deadline_timer類沒有定義默認構造函數 - 你必須選擇defined constructors之一。似乎有三個可供選擇：

basic_deadline_timer(
    boost::asio::io_service & io_service); 

basic_deadline_timer(
    boost::asio::io_service & io_service, 
    const time_type & expiry_time); 

basic_deadline_timer(
    boost::asio::io_service & io_service, 
    const duration_type & expiry_time); 

顯然模板錯誤是難以閱讀和包括無用的大量信息 - 它們解析一直是藝術形式的東西。您可能希望考慮安裝stlfilt - 這是一組perl腳本，它們可以在某種程度上簡化錯誤消息。