Subject: [Boost-bugs] [Boost C++ Libraries] #4749: Problem with deadline_timer on MacOSX
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-10-18 08:10:42
#4749: Problem with deadline_timer on MacOSX
-------------------------------------+--------------------------------------
Reporter: jc_monnin@⦠| Owner: chris_kohlhoff
Type: Bugs | Status: new
Milestone: To Be Determined | Component: asio
Version: Boost 1.44.0 | Severity: Problem
Keywords: |
-------------------------------------+--------------------------------------
When multiple threads call io_service::run() and there is one active
deadline_timer, deadline_timer takes much more time to invoke the handler
that specified.[[BR]]
This has been observed on MacOSX 10.6, XCode 3.2.2 using the test
application posted below. The time between the 1st and 2nd invoke of
"print1" is almost 5 minutes instead of 1 second.[[BR]]
It runs fine on Windows and Linux and when defining
BOOST_ASIO_DISABLE_KQUEUE, the problem disappears on MacOSX.
{{{
#include <iostream>
#include <boost/asio.hpp>
#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
class printer
{
public:
printer(boost::asio::io_service& io)
: strand_(io),
timer1_(io, boost::posix_time::seconds(1)),
count_(0)
{
timer1_.async_wait(strand_.wrap(boost::bind(&printer::print1, this)));
}
~printer()
{
std::cout << "Final count is " << count_ << "\n";
}
void print1()
{
if (count_ < 10)
{
std::cout << "Timer 1: " << count_ << "\n";
++count_;
timer1_.expires_at(timer1_.expires_at() +
boost::posix_time::seconds(1));
timer1_.async_wait(strand_.wrap(boost::bind(&printer::print1, this)));
}
}
private:
boost::asio::strand strand_;
boost::asio::deadline_timer timer1_;
int count_;
};
int main()
{
boost::asio::io_service io;
printer p(io);
boost::thread t(boost::bind(&boost::asio::io_service::run, &io));
io.run();
t.join();
return 0;
}
}}}
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/4749> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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