Boost logo

Boost Users :

Subject: Re: [Boost-users] [Threads] How to keep number of running thread constant, performing different operations
From: Alessandro Candini (candini_at_[hidden])
Date: 2011-09-01 08:13:43

I've tryed implementing your suggestions with the following code:

#include <iostream>
#include </usr/local/include/boost/asio.hpp>
#include </usr/local/include/boost/thread/thread.hpp>
#include </usr/local/include/boost/bind.hpp>
#include </usr/local/include/boost/date_time/posix_time/posix_time.hpp>
#include </usr/local/include/boost/scoped_ptr.hpp>

void handler1()
     unsigned short int i;

     std::cout << "O--> Handler 1 <--O" << std::endl;
     for(i=0; i<65000; i++);
     std::cout << "X--> Handler 1 <--X" << std::endl;

void handler2()
     unsigned short int i;

     std::cout << "O--> Handler 2 <--O" << std::endl;
     for(i=0; i<1000; i++);
     std::cout << "X--> Handler 2 <--X" << std::endl;
int main()
     unsigned short nProc,
     boost::asio::io_service io;
     boost::scoped_ptr<boost::asio::io_service::work> work(new

     boost::thread_group tg;
     nProc = boost::thread::hardware_concurrency();

     for(i=0; i<nProc; ++i)


     return 0;

It seems to work, but it is correct, in your opinion?
The only problem is that it seems to never stop if I increase the value
of i in handler1 up to 70000.
Have you any other suggestions?

Alessandro Candini
MEEO S.r.l.
Via Saragat 9
I-44122 Ferrara, Italy
Tel: +39 0532 1861501
Fax: +39 0532 1861637
"ATTENZIONE:le informazioni contenute in questo messaggio sono
da considerarsi confidenziali ed il loro utilizzo è riservato unicamente
al destinatario sopra indicato. Chi dovesse ricevere questo messaggio
per errore è tenuto ad informare il mittente ed a rimuoverlo
definitivamente da ogni supporto elettronico o cartaceo."
"WARNING:This message contains confidential and/or proprietary
information which may be subject to privilege or immunity and which
is intended for use of its addressee only. Should you receive this
message in error, you are kindly requested to inform the sender and
to definitively remove it from any paper or electronic format."

Boost-users list run by williamkempf at, kalb at, bjorn.karlsson at, gregod at, wekempf at