Re: [Boost-users] boost::thread no parameter?

From: Beman Dawes (bdawes_at_[hidden])
Date: 2004-03-10 21:04:36

At 07:49 PM 3/10/2004, Howard Hinnant wrote:

 >On Mar 10, 2004, at 6:27 PM, GoochRules! wrote:
 >> I'm wondering why there is no option to pass a parameter to a thread
 >> function with boost's threads.  With pthreads and Windows CreateThread
 >> I'm used to casting an object to a void*, and retrieving the object
 >> within the thread function.  The only thing similar with boost::thread
 >> seems to be to create a struct with an operator()() and a constructor
 >> that takes a void*.  operator()() then calls an external function with
 >> the passed void*.
 >>
 >> Just curious about this design decision.
 >
 >I would guess because it is so easy (at least with the right tools!) to
 >create function objects that adapt a function from one that takes
 >parameters to one that doesn't.
 >
 >void foo(int, double);
 >void bar(A*);
 >
 >struct A{};
 >
 >int main()
 >{
 >     thread t1(bind(foo, 1, 2.5));
 >     thread t2(bind(bar, new A));
 >}

Seems like thread/doc/thread.html should give an example similar to the 
above. Maybe modified with a join() and changed so it doesn't leak:-)

--Beman