sizeof() segfault and mutex initialization?

[Stefan Olsson]

Phil Edwards wrote:

>>Is it possible/ok to call __gthread_objc_mutex_allocate?
>>    
>>
>
>No/no.  They aren't available to C++.  But we can define one ourselves,
>or maybe (doubtful) add one to the gthr-*.h files.
>
I have lots to learn about the inner workings of libstdc++ and it might 
be a dumb question but what would the downside of adding this function be?

>  
>
>>How can this be done?
>>    
>>
>
>You can do a malloc followed by __GTHREAD_MUTEX_INIT_FUNCTION.  Look at
>the messy code I just committed to config/cpu/generic/atomicity.h and the
>bottom of src/misc-inst.cc for how some of that works.
>  
>
Sorry, don't understand. As specified in gthr.h:
     __GTHREAD_MUTEX_INIT_FUNCTION
                some systems can't initialize a mutex without a
                function call.  On such systems, define this to a
                function which looks like this:
                  void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *)
                Don't define __GTHREAD_MUTEX_INIT in this case

Since gthr-posix.h defines __GTHREAD_MUTEX_INIT the 
__GTHREAD_MUTEX_INIT_FUNCTION is not available.

What am I missing here?

Brgds

/Stefan

-- 
Experience is what you get when you were expecting something else.