Re: [Boost-users] boost thread with class

Subject: Re: [Boost-users] boost thread with class
From: Philipp Kraus (philipp.kraus_at_[hidden])
Date: 2012-12-30 14:12:26

Am 30.12.2012 um 19:31 schrieb Vicente J. Botet Escriba:

> Le 30/12/12 19:20, Philipp Kraus a écrit :
>> Am 30.12.2012 um 12:53 schrieb Szymon Gatner:
>> 
>>> Hi Philip,
>>> 
>>> 2012/12/30 Philipp Kraus <philipp.kraus_at_[hidden]>:
>>> 
>>>> Which structure must be implementated for the class myThread and from which class must be derived?
>>>> 
>>> no need for derivation. Just implement operator() for your class like so:
>>> 
>>> class myThread {
>>>    public
>>>          some methods
>>> 
>>>  void operator()()
>>>  {
>>>    // this will run in new thread
>>>  }
>>> 
>>>     private
>>>         some properties
>>> }
>> I get with this use compiler errors, this code
>> 
>>  boost::thread_group l_group;
>> for(std::size_t i=0; i < 5; ++i)
>> 
>> l_group.join_all();
>> 
>> shows: error: no match for call to '(boost::thread_group) (myThread)'
>> 
>> on the loop line I have tested
>> 
>> l_group( boost::thread(myThread) );
>> 
>> and creates the error: 
>> 
>> error: no match for call to '(boost::thread_group) (boost::thread)
>> 
>> In my class "myThread" I have a overloaded public method: void operator() (void);
>> 
>> How can I fix the error?
>> 
>> 
> To create and add a new thread to a thread_group you should use 
> Member function create_thread()
> 
> template<typename F>
> thread* create_thread(F threadfunc);
> Effects:
> Create a new boost::thread object as-if by new thread(threadfunc) and add it to the group.
> 
> Postcondition:
> this->size() is increased by one, the new thread is running.
> 
> Returns:
> A pointer to the new boost::thread object.
> 
> 
>        l_group.create_thread( myThread() );

Thanks for this hint, I don't find this passage on the documentation at the moment, but with create_thread it works

Phil