Re: [Boost-users] How to terminate a specific thread among other threads

Subject: Re: [Boost-users] How to terminate a specific thread among other threads
From: Master (master.huricane_at_[hidden])
Date: 2012-04-15 09:17:56

none worked :(
neither the boost::this_thread::get_id() is useable in a switch statement ,
nor the suggested use of boost::thread* or boost::container::vector<thread>
.

before i give the faulty source code of mine , i need to answer what
exactly im after .
see some of my friends are trying to learn boost , specially to work with
its threading capabilities to use it in a project of theirs . they have no
idea what boost is , or how these stuff work , so its on me , because
unlike them i had a little experience with boost in a long past .
so one of them asked me a question on a scenario where there is a function
, which is reapeately creating new threads , and each thread execute a
function with a unique request message ,
in the aforementioned function ( dispatcher lets say ) , he wants to see if
he as a ability to distinguish between the coming threads , and altering
them at any given moment , be it terminating them , or simply getting its
Id for further management , again by management i mean , in other functions
( or objects methods ) the thread can be specified by its ID , for being
recognized for being surveyed , or again being terminated or moved .

and i also have another question , how do i send an argument to afunction
with is goingto be used as packaged_task? it seems , i can only make
packaged_task objects out of strucs! or classes! seems i cant even use
functions at all! is it right ? i would appreciate an explanation on this
matter too please .

and now here is the source :
i am on windows 7 sp1 - 32bit - Visual studio 2010 .

> #include <boost/signal.hpp>
> #include <iostream>
> #include <boost/thread.hpp>
> using namespace std;
>
> boost::thread* threadarray[3];
>
> int t(int x)
> {
>     switch(boost::this_thread::get_id())
>     {
>     case threadarray[0].get_id():
>         cout<<"thread 1";
>         break;
>         case threadarray[1].get_id():
>         //DISPOSE THIS THREAD or CHANGE OWNERSHITP, OR  GET ANOTHER JOB TO
> IT , OR CHECK IF IT WAS SUCCESSFUL OR NOT
>         cout<<"thread 2";
>             break;
>         case threadarray[3].get_id():
>         cout<<"thread 3";
>         break;
>         default:
>             cout<<"default";
>     }
>     return 0;
> }
>
> int main()
> {
>     boost::thread t1(t,5), t2(t,6),t3(t,7);
>
>     threadarray[0] = t1.move();
>     threadarray[1] = t2.move();
>     threadarray[2] = t3.move();
>
>     for(int i = 0; i <3;i++)
>     {
>         threadarray[i].join();
>     }
>     system("pause");
> }

and these are the errors:

> Error    1    error C2450: switch expression of type 'boost::thread::id'
> is illegal    c:\users\master\documents\visual studio 2010\projects\boost
> example\boost example\mb.cpp    61    1    Boost Example
> Error    2    error C2228: left of '.get_id' must have
> class/struct/union    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    63    1    Boost Example
> Error    3    error C2046: illegal case
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    63    1    Boost Example
> Error    4    error C2228: left of '.get_id' must have
> class/struct/union    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    66    1    Boost Example
> Error    5    error C2046: illegal case
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    66    1    Boost Example
> Error    6    error C2228: left of '.get_id' must have
> class/struct/union    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    70    1    Boost Example
> Error    7    error C2046: illegal case
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    70    1    Boost Example
> Warning    8    warning C4065: switch statement contains 'default' but no
> 'case' labels    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    75    1    Boost Example
> Error    9    error C2440: '=' : cannot convert from 'boost::thread' to
> 'boost::thread *'    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    83    1    Boost Example
> Error    10    error C2440: '=' : cannot convert from 'boost::thread' to
> 'boost::thread *'    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    84    1    Boost Example
> Error    11    error C2440: '=' : cannot convert from 'boost::thread' to
> 'boost::thread *'    c:\users\master\documents\visual studio
> 2010\projects\boost example\boost example\mb.cpp    85    1    Boost Example
> Error    12    error C2228: left of '.join' must have class/struct/union
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    89    1    Boost Example
>     13    IntelliSense: expression must have integral or enum type
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    11    9    Boost Example
>     14    IntelliSense: expression must have class type
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    13    7    Boost Example
>     15    IntelliSense: expression must have class type
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    16    8    Boost Example
>     16    IntelliSense: expression must have class type
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    20    8    Boost Example
>     17    IntelliSense: no suitable conversion function from
> "boost::thread" to "boost::thread *" exists
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    33    19    Boost Example
>     18    IntelliSense: no suitable conversion function from
> "boost::thread" to "boost::thread *" exists
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    34    19    Boost Example
>     19    IntelliSense: no suitable conversion function from
> "boost::thread" to "boost::thread *" exists
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    35    19    Boost Example
>     20    IntelliSense: expression must have class type
>  c:\users\master\documents\visual studio 2010\projects\boost example\boost
> example\mb.cpp    39    3    Boost Example
>
>