Re: [Boost-users] Member function as a thread function

From: Cory Nelson (phrosty_at_[hidden])
Date: 2006-02-14 17:07:37

You need to correctly specify the member function pointer, and pass in
the 'this' pointer.  Try boost::bind(&MyClass::ChildThreadFunc, this,
ii)

On 2/14/06, Steven Wooding <steve.apo_at_[hidden]> wrote:
> Hi,
>
> I've had a good search on the mailing list and while some posts have
> got close to my problem and given me a few glues, my code does't quite
> work the way I want it to.
>
> My goal is to have a (non-static) class member function run in a child
> thread + passing a parameter to it. The code I've got at the moment
> goes something like this:
>
> void MyClass::spawn_threads()
> {
>   for ( int ii = 0; ii < num_threads; ++ii)
>   {
>      threadGroup.create_thread( boost::bind( ChildThreadFunc, _1, ii));
>   }
> }
>
> void MyClass::ChildThreadFunc( int &threadNumber)
> {
>   // Does some work
> }
>
> I get the following error on the create_thread line:
>
> error: no matching function call to bind(<unknown type>, boost::arg<1>&, int&)
> cadiates are: .... boost:bind(F, A1, A2)[ with F= void
> (MyClass::*)(int&), A1=boost:arg<1>, A2=int]
>
> I'm confused by the <unknown type> business. How do I tell it the correct type?
>
> Maybe someone could point out where I've erred.
>
> Cheers,
>
> Steve.
>
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>

--
Cory Nelson
http://www.int64.org