当我在我的方法SendMessageAgain调用deadline_timer::async_wait ，有时会引发段错误。 它可以通过以下两种方式之一发生： 我在下面包括了回溯。 它似乎是随机的，这使我以某种方式考虑了比赛条件。 我有一个带有io_service对象ioService的类，以及多个线程，每个线程都有与ioService挂钩的ioService 。 在调用async_wait之前是否可能需要锁定ioService ？ 我以为它可以解决这个问题。
也许它与计时器滴答声中被中断的任何代码有关。 当同时执行其他代码时，设置截止期限计时器的正确方法是什么？
我在SendMessageAgain中使用的代码是
void Node::SendMessageAgain(unsigned long seqNum) {
// figure out if and what to send (using object fields)
if (should_send_again) {
Send(...);
timer->expires_from_now(INTERVAL);
timer->async_wait(bind(&Node::SendMessageAgain, this, seqNum));
}
}
#0 0x08060609 in boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime> >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Node, unsigned long>, boost::_bi::list2<boost::_bi::value<Node*>, boost::_bi::value<unsigned long> > > > (this=0x14, impl=..., handler=...)
at /usr/include/boost/asio/detail/deadline_timer_service.hpp:170
#1 0x0805e2e7 in boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Node, unsigned long>, boost::_bi::list2<boost::_bi::value<Node*>, boost::_bi::value<unsigned long> > > > (this=0x0, impl=...,
handler=...) at /usr/include/boost/asio/deadline_timer_service.hpp:135
#2 0x0805bcbb in 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> > >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Node, unsigned long>, boost::_bi::list2<boost::_bi::value<Node*>, boost::_bi::value<unsigned long> > > > (this=0x807fc50, handler=...)
at /usr/include/boost/asio/basic_deadline_timer.hpp:435
#3 0x080555a2 in Node::SendMessageAgain (this=0xbfffefdc, seqNum=8)
at node.cpp:147
#0 __pthread_mutex_lock (mutex=0x2f200c4) at pthread_mutex_lock.c:50
#1 0x08056c79 in boost::asio::detail::posix_mutex::lock (this=0x2f200c4)
at /usr/include/boost/asio/detail/posix_mutex.hpp:52
#2 0x0805a036 in boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>::scoped_lock (this=0xbfffeb04, m=...)
at /usr/include/boost/asio/detail/scoped_lock.hpp:36
#3 0x08061dd0 in boost::asio::detail::epoll_reactor::schedule_timer<boost::asio::time_traits<boost::posix_time::ptime> > (this=0x2f200ac, queue=...,
time=..., timer=..., op=0x807fca0)
at /usr/include/boost/asio/detail/impl/epoll_reactor.hpp:43
#4 0x0806063a in boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime> >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Node, unsigned long>, boost::_bi::list2<boost::_bi::value<Node*>, boost::_bi::value<unsigned long> > > > (this=0xb6b005fc, impl=...,
handler=...)
at /usr/include/boost/asio/detail/deadline_timer_service.hpp:170
#5 0x0805e2fd in boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Node, unsigned long>, boost::_bi::list2<boost::_bi::value<Node*>, boost::_bi::value<unsigned long> > > > (this=0xb6b005e8,
impl=..., handler=...)
at /usr/include/boost/asio/deadline_timer_service.hpp:135
#6 0x0805bcd1 in boost::asio::basic_deadline_timer<boost::posix_time::ptime, bo---Type <return> to continue, or q <return> to quit---
ost::asio::time_traits<boost::posix_time::ptime>, boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> > >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Node, unsigned long>, boost::_bi::list2<boost::_bi::value<Node*>, boost::_bi::value<unsigned long> > > > (this=0xb6b005a0, handler=...)
at /usr/include/boost/asio/basic_deadline_timer.hpp:435
#7 0x080555a7 in Node::SendMessageAgain (this=0xbfffefdc, seqNum=9)
at node.cpp:148