id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
13392,"deadline_timer  -> endless handler recursion, if it should have been cancelled.",HeinrichBoost <heinrich_nbongo@…>,chris_kohlhoff,"Following http://www.boost.org/doc/libs/1_65_0/doc/html/boost_asio/reference/deadline_timer.html example, I made a modification to do a cyclic timer:

{{{
void MyClass::on_timeout()
{

// Here I rely on the documentation, which states that:
// basic_deadline_timer::expires_at (2 of 3 overloads) :
//
// **Any pending  asynchronous wait operations will be cancelled.**
//
// that is no need for
//
// if (error)
// {
//    return;
// }
   mTimer.expires_at(mTimer.expires_at() + boost::posix_time::seconds(2));
   mTimer.async_wait(on_timeout); 
   mIoService.post(boost::bind(&MyClass::mDoWorkCallback, this));
}
}}}


Further I have

{{{
void MyClass::Restart()
{
// Here I rely on the documentation, which states that:
// basic_deadline_timer::expires_from_now (2 of 3 overloads) :
//
// **Any pending  asynchronous wait operations will be cancelled.**
//

   mTimer.expires_from_now(boost::posix_time::seconds(2));
   mTimer.async_wait(on_timeout); 
}
}}}


What happens is not what I expect. If I don't call ''Restart()'' everything works fine, i.e.'' asyn_wait(handlers)'' are interrupted. But If I call once ''Restart()'', and after the call ''expires_from_now'' is executed inside, the ''on_timeout'' handler is called in an endless recursion regardless the time value of the timer. For example, value is 5 seconds, but the handler is called many times in a millisecond (with ''operation aborted(995)'' as an error argument, i.e. its been continuously cancelled).

I also get **once** an error message when calling ''expires_from_now'' :

{{{
operation aborted(995) The I/O operation has been aborted because of 
either a thread exit or an application request
}}}

which would mean OK to me : the handler was canceled. But nevertheless it continues to be executed.

The above behavior doesn't occur if I uncomment following code in the handler

if (error)
{
   return;
}

The above seems to me buggy. And to you ?",Bugs,new,To Be Determined,asio,Boost 1.65.0,Problem,,"deadline_timer, hanlder cancelling",heinrich_nbongo@…