On 10/30/06, Fernando Perez <[EMAIL PROTECTED]> wrote:
> On 10/30/06, Charles R Harris <[EMAIL PROTECTED]> wrote:
>
> > I suspect the real problem is that the refcount keeps going up. Even if it
> > was unsigned it would eventually wrap to zero and with a bit of luck get
> > garbage collected. So probably something isn't decrementing the refcount.
>
> Oops, my bad: I meant *unsigned long long*, so that the refcount is a
> 64-bit object. By the time it wraps around, you'll have run out of
> memory long ago. Having 32 bit ref counters can potentially mean you
> run out of the counter before you run out of RAM on a system with
> sufficient memory.
>
> Cheers,
FYI, this is what is defined in Include/object.h
/* PyObject_HEAD defines the initial segment of every PyObject. */
#define PyObject_HEAD \
_PyObject_HEAD_EXTRA \
Py_ssize_t ob_refcnt; \
struct _typeobject *ob_type;
#define Py_INCREF(op) ( \
_Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
(op)->ob_refcnt++)
#define Py_DECREF(op) \
if (_Py_DEC_REFTOTAL _Py_REF_DEBUG_COMMA \
--(op)->ob_refcnt != 0) \
_Py_CHECK_REFCNT(op) \
else \
_Py_Dealloc((PyObject *)(op))
And '_Py_CHECK_REFCNT' macro will finally call Py_FatalError
'ob_refcnt' is a Py_ssize_t integer, so I think you will not be able
to overflow it, unless in case of C code with refcounting bugs. Am I
right?
--
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
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