On Apr 10, 2008, at 11:10 AM, Michael.Abshoff wrote:
>
> Brian Granger wrote:
>
> Hi Brian,
>
>>> Sure and it is certainly good to be discussed. I didn't want to be
>>> dismissive about the idea, it is just that I have been in the
>>> "debugging
>>> memory leaks in Cython extension" trenches
Brian Granger wrote:
Hi Brian,
>> Sure and it is certainly good to be discussed. I didn't want to be
>> dismissive about the idea, it is just that I have been in the "debugging
>> memory leaks in Cython extension" trenches for the last eight months and
>> hence I do not trust python or its m
On Apr 10, 2008, at 9:51 AM, Brian Granger wrote:
>
> Hi,
>
> (dual posted to sage and cython)
>
> A few of us (ipython and mpi4py devs) are wondering what the
> best/safest way of allocating dynamic memory in a local scope
> (method/function) is when using cython. An example would be if you
> ne
> Sure and it is certainly good to be discussed. I didn't want to be
> dismissive about the idea, it is just that I have been in the "debugging
> memory leaks in Cython extension" trenches for the last eight months and
> hence I do not trust python or its memory management at all any more.
>
> Just for the record, I think Brian isn't suggesting we do anything
> differently with Sage. He's writing lots of _new_ code using
> Cython for his distributed matrix arrays project, and ran into this problem,
> and thought -- surely the Sage folks have solved this. Then he looked
> at our
> It's I think a general problem not only in Python but in programming
> in general. The authors of http://www.flintlib.org/ -- a pure C library --
> spent a lot of time worrying about this, just to I think decide that it's
> a really hard problem.
Very true.
> That said, there is definite
On Thu, Apr 10, 2008 at 10:04 AM, Brian Granger <[EMAIL PROTECTED]> wrote:
>
> > > Lisandro Dalcin (author of mpi4py) came up with the following trick
> > > that, while more complicated, prevents memory leaks:
> > >
> > > cdef extern from "Python.h":
> > > object PyString_FromStri
> > Lisandro Dalcin (author of mpi4py) came up with the following trick
> > that, while more complicated, prevents memory leaks:
> >
> > cdef extern from "Python.h":
> > object PyString_FromStringAndSize(char*,Py_ssize_t)
> > char* PyString_AS_STRING(object)
> >
> > cdef inline
On Thu, Apr 10, 2008 at 9:51 AM, Brian Granger <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> (dual posted to sage and cython)
>
> A few of us (ipython and mpi4py devs) are wondering what the
> best/safest way of allocating dynamic memory in a local scope
> (method/function) is when using cython. An
