Re: [Boost-users] [Newbie] How to create a class member thread

24 Feb 2009

      ----- Original Message ----- 
From: "Daniele Barzotti" 
To: 
Sent: Tuesday, February 24, 2009 6:35 PM
Subject: [Boost-users] [Newbie] How to create a class member thread
...
Hi,
I'm sure the question is very banal...
I have a thread object stored in a class:
class MyClass {
private:
   void Init();
   boost::thread _thread;
}
How can I create it in the implementation code?
MyClass::Init()
{
 // start thread here...
}
Hi,

You can not. Thread is default constructible but not copy constructible.

You can do 

MyClass() : _thread(fct) {}

If you want to start the thread later on you need a pointer to a thread

class MyClass {

private:
    void Init();
    scoped_ptrboost::thread _thread;
}

MyClass() : _thread(0) {}
MyClass::Init() {
    _thread.reset(new boost::thread(fct));
    ....
}

If you can not have a pointer, you can use a volatile boolean as follows:

voif fct(volatile bool& started) {
    while(!started) ;
    // start here the real function
}

MyClass() : _started(false), _thread(bind(fct, _started)) {}
MyClass::Init() {
    _started=true;
    ....
}

BTW, why do you want to start the thread on the Init function and not on the constructor?

HTH,

Vicente

Re: [Boost-users] [Newbie] How to create a class member thread

vicente.botet