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[3.10] bpo-42972: Fully support GC for mmap heap types (GH-26373) by miss-islington · Pull Request #26407 · python/cpython · GitHub

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[3.10] bpo-42972: Fully support GC for mmap heap types (GH-26373) #26407

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Merged
miss-islington merged 1 commit into from
May 27, 2021
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[3.10] bpo-42972: Fully support GC for mmap heap types (GH-26373) #26407

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13 changes: 10 additions & 3 deletions Modules/mmapmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -126,10 +126,18 @@ get_mmap_state(PyObject *module)
return state;
}

static int
mmap_object_traverse(mmap_object *m_obj, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(m_obj));
return 0;
}

static void
mmap_object_dealloc(mmap_object *m_obj)
{
PyTypeObject *tp = Py_TYPE(m_obj);
PyObject_GC_UnTrack(m_obj);

#ifdef MS_WINDOWS
Py_BEGIN_ALLOW_THREADS
Expand Down Expand Up @@ -1085,15 +1093,14 @@ To map anonymous memory, pass -1 as the fileno (both versions).");

static PyType_Slot mmap_object_slots[] = {
{Py_tp_new, new_mmap_object},
{Py_tp_alloc, PyType_GenericAlloc},
{Py_tp_dealloc, mmap_object_dealloc},
{Py_tp_free, PyObject_Del},
{Py_tp_repr, mmap__repr__method},
{Py_tp_doc, (void *)mmap_doc},
{Py_tp_methods, mmap_object_methods},
{Py_tp_members, mmap_object_members},
{Py_tp_getset, mmap_object_getset},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_traverse, mmap_object_traverse},

/* as sequence */
{Py_sq_length, mmap_length},
Expand All @@ -1114,7 +1121,7 @@ static PyType_Slot mmap_object_slots[] = {
static PyType_Spec mmap_object_spec = {
.name = "mmap.mmap",
.basicsize = sizeof(mmap_object),
.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC),
.slots = mmap_object_slots,
};

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