Re: [Boost-users] boost thread with class

30 Dec 2012


      Am 30.12.2012 um 19:31 schrieb Vicente J. Botet Escriba:
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Le 30/12/12 19:20, Philipp Kraus a écrit :
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Am 30.12.2012 um 12:53 schrieb Szymon Gatner:
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Hi Philip,
2012/12/30 Philipp Kraus :
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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