Re: [boost] C function adaptor.

From: Steven Watanabe (steven_at_[hidden])
Date: 2007-04-20 19:00:27

AMDG

Rene Rivera <grafikrobot <at> gmail.com> writes:

> 
> Steven Watanabe wrote:
> > Rene Rivera <grafikrobot <at> gmail.com> writes:
> >> Steven Watanabe wrote:
> >>> Unfortunatly, it is necessary to retain the lock
> >>> until you are done with f.
> >> Define "done with f".
> >>
> > 
> > Reach a point where you will not call it again.
> > (I'm refering the the value returned by make_c_function
> > not the variable f)
> 
> How do you determine that you won't call it again? What do you want to 
> happen at that time? What do you want to happen after that time? Sorry 
> if I keep asking, but it's hard to answer questions with essentially no 
> information as to what you want to do.
> 

struct tag {};

void f(int (&array)[100][3], unsigned key_index) {
  assert(key_index < 3);
  std::qsort(array,100,sizeof(int[3]),
    make_c_function<tag,void(const void*,const void*)>(
      ll::static_cast_<const int*>(_1)[key_index] <
      ll::static_cast_<const int*>(_1)[key_index]));
}

In Christ,
Steven Watanabe