[m-users.] Too Slow

[Julien Fischer]

On Sat, 2 May 2015, Julien Fischer wrote:

>
> Hi Peter,
>
> On Sat, 2 May 2015, Peter Wang wrote:
>
>> On Fri, 1 May 2015 23:23:49 +1000, Mark Brown <mark at mercurylang.org> wrote:
>>> 
>>> Unfortunately, libtommath falls into this category - it expects
>>> mp_ints to be cleared when they're done with. So the code still leaks
>>> even with the above changes.
>> 
>> It's not very convenient, but libtommath does provide a way to override
>> the allocation functions that it uses: by defining the preprocessor
>> symbols XMALLOC/XREALLOC/XCALLOC/XFREE when building the library, e.g.
>>
>>    CFLAGS='-DXMALLOC=MR_GC_malloc -DXREALLOC=MR_GC_realloc \
>> 	    -DXCALLOC=MR_GC_calloc -DXFREE=GC_free' make
>
> That might cause a few problems given that there is (currently) no such
> function as MR_GC_calloc! ;-)
>
> Also, defining those macros on the command line is going to be a PITA
> for clients of the libtommath binding.  It would be better done inside a
> foreign_decl pragam, just before the inclusion tommath.h (suitably
> protected by checks that the macros are not already defined).

Ignore that bit, I didn't look carefully enough; that's libttomath
itself being built.

Cheers,
Julien.