[plt-scheme] PLT Scheme v370

Of course I'm trying to estimate the impact of m3 on my mzgtk2 Gtk+ 
bindings.
I have some real C code in there. that is compiled with a C compiler. Is it
possible to compile this code through mzc? Or was this not what you meant
with compiling with mzc?

Eli Barzilay schreef:
> On May 25, Hans Oesterholt-Dijkema wrote:
>   
>>> In general, you should be careful with any C code that may keep a
>>> reference to something.  For example -- say that you allocate pull a C
>>> string out of a Scheme bytes object, and pass the pointer to a C
>>> function.  As long as the call is active, no GC will happen and things
>>> are fine -- but if the C code will keep a reference to that string and
>>> then return, then at some point in the future, the string may have
>>> been moved.
>>>   
>>>       
>> Do you mean something like this?:
>>
>>
>> static char *global_pointer[10];
>>
>> void f(Scheme_Object *o)
>> {
>>   char *s=SCHEME_STR_VAL(o);
>>   global_pointer[0]=s;
>>   ...
>> }
>>     
>
> Not when it's *your* code, since mzc will add the annotations that
> will treat your globals as pointers to move too.
>
>
>   
>> void g(Scheme_Object *o)
>> {
>>   char *s=SCHEME_STR_VAL(o);
>>   global_pointer[0]=s*+10*;
>>   ...
>> }
>>     
>
> BTW, I don't know what `s*+10*' is trying to achieve, but also note
> that 3m does not like pointers into the middle of allocated objects.
>
>