[m-users.] Too Slow

Julien Fischer jfischer at opturion.com
Sat May 2 01:16:55 AEST 2015

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.


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