Re: [pygccxml-development] gil_guard_t example ?

[Damien F. <dam...@mo...>]

Looking at the result that was what it looked it does
but in one use of it in pyopensg there is those comments that miss lead 
me ...

def unlocked_native():
   '''
   Returns a function transform creator for native functions and methods 
that
   do not hold the GIL while they execute.
   '''

this use a derived class from FT.transformer_t
with :
   def required_headers(self):
      return [ pyplusplus.code_repository.gil_guard.file_name ]

   def __configureSealed(self, controller):
      # Create a guard for the GIL before the actual fucntion call is made.
      # This is an exception-safe approach to managing the GIL.
      controller.add_pre_call_code(
         'pyplusplus::threading::gil_guard_t guard(true);'
      )
.....

so could I use the transformer to write a little wrapper that would do 
what I need ?

static boost::python::object applyTo_0fec81cf95d5ecaac2dd1187f0efac01( 
... .... )
{
    ::Muggins::MugginPtr result;
    {
        /// a object that wrapper the GIL unlocking
        scoped_releaseGIL();
       /// my functiontion call
        result = inst.applyTo(target);
    }
    return bp::object( result );
}

or some things like that ?

Thanks

Damien

> On Tue, Aug 19, 2008 at 2:04 PM, Damien Fagnou
> <dam...@mo...> wrote:
>   
>> Hi ,
>>
>> some of the member function that we bind can potentially take some time
>> , and we are looking to a way to
>> release the GIL during there execution .
>>
>> looking on the web I see that py++ as some things in place for that :
>> gil_guard_t
>> and I found couple of project using that , but I am still a little
>> confuse on how to use it .
>>     
>
> gil_guard_t is used for completely other purposes.
>
> If you have algorithm, written in C++, which invokes code written in
> Python, than you have to lock GIL. This is exactly what gil_guard_t
> does.
>
> Not the opposite.
>
>   
>> is there an example somewhere on how to best use it ?
>>     
>
> No
>
>