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gh-101819: Port _io.PyBytesIOBuffer_Type to heap type #104264

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May 7, 2023
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gh-101819: Port _io.PyBytesIOBuffer_Type to heap type #104264

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7e628db
gh-101819: Port _io.PyBytesIOBuffer_Type to heap type
erlend-aasland Feb 15, 2023
d5d4f09
Fixup
erlend-aasland May 7, 2023
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5 changes: 1 addition & 4 deletions Modules/_io/_iomodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -671,9 +671,6 @@ static PyTypeObject* static_types[] = {
&PyBufferedIOBase_Type,
&PyRawIOBase_Type,
&PyTextIOBase_Type,

// PyRawIOBase_Type(PyIOBase_Type) subclasses
&_PyBytesIOBuffer_Type,
};


Expand Down Expand Up @@ -753,6 +750,7 @@ PyInit__io(void)

// Base classes
ADD_TYPE(m, state->PyIncrementalNewlineDecoder_Type, &nldecoder_spec, NULL);
ADD_TYPE(m, state->PyBytesIOBuffer_Type, &bytesiobuf_spec, NULL);

// PyIOBase_Type subclasses
state->PyRawIOBase_Type = (PyTypeObject *)Py_NewRef(&PyRawIOBase_Type);
Expand All @@ -771,7 +769,6 @@ PyInit__io(void)
state->PyBufferedIOBase_Type);

// PyRawIOBase_Type(PyIOBase_Type) subclasses
state->PyBytesIOBuffer_Type = (PyTypeObject *)Py_NewRef(&_PyBytesIOBuffer_Type);
ADD_TYPE(m, state->PyFileIO_Type, &fileio_spec, state->PyRawIOBase_Type);
#ifdef MS_WINDOWS
ADD_TYPE(m, state->PyWindowsConsoleIO_Type, &winconsoleio_spec,
Expand Down
3 changes: 1 addition & 2 deletions Modules/_io/_iomodule.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ extern PyType_Spec bufferedreader_spec;
extern PyType_Spec bufferedrwpair_spec;
extern PyType_Spec bufferedwriter_spec;
extern PyType_Spec bytesio_spec;
extern PyType_Spec bytesiobuf_spec;
extern PyType_Spec fileio_spec;
extern PyType_Spec nldecoder_spec;
extern PyType_Spec stringio_spec;
Expand Down Expand Up @@ -194,5 +195,3 @@ extern _PyIO_State *_PyIO_get_module_state(void);
#ifdef HAVE_WINDOWS_CONSOLE_IO
extern char _PyIO_get_console_type(PyObject *);
#endif

extern Py_EXPORTED_SYMBOL PyTypeObject _PyBytesIOBuffer_Type;
71 changes: 27 additions & 44 deletions Modules/_io/bytesio.c
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Expand Up @@ -1090,64 +1090,47 @@ bytesiobuf_releasebuffer(bytesiobuf *obj, Py_buffer *view)
b->exports--;
}

static int
bytesiobuf_clear(bytesiobuf *self)
{
Py_CLEAR(self->source);
return 0;
}

static int
bytesiobuf_traverse(bytesiobuf *self, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(self));
Py_VISIT(self->source);
return 0;
}

static void
bytesiobuf_dealloc(bytesiobuf *self)
{
PyTypeObject *tp = Py_TYPE(self);
/* bpo-31095: UnTrack is needed before calling any callbacks */
PyObject_GC_UnTrack(self);
Py_CLEAR(self->source);
Py_TYPE(self)->tp_free(self);
(void)bytesiobuf_clear(self);
tp->tp_free(self);
Py_DECREF(tp);
}

static PyBufferProcs bytesiobuf_as_buffer = {
(getbufferproc) bytesiobuf_getbuffer,
(releasebufferproc) bytesiobuf_releasebuffer,
static PyType_Slot bytesiobuf_slots[] = {
{Py_tp_dealloc, bytesiobuf_dealloc},
{Py_tp_traverse, bytesiobuf_traverse},
{Py_tp_clear, bytesiobuf_clear},

// Buffer protocol
{Py_bf_getbuffer, bytesiobuf_getbuffer},
{Py_bf_releasebuffer, bytesiobuf_releasebuffer},
{0, NULL},
};

Py_EXPORTED_SYMBOL PyTypeObject _PyBytesIOBuffer_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"_io._BytesIOBuffer", /*tp_name*/
sizeof(bytesiobuf), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)bytesiobuf_dealloc, /*tp_dealloc*/
0, /*tp_vectorcall_offset*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_as_async*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
&bytesiobuf_as_buffer, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
0, /*tp_doc*/
(traverseproc)bytesiobuf_traverse, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
0, /*tp_methods*/
0, /*tp_members*/
0, /*tp_getset*/
0, /*tp_base*/
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
0, /*tp_dictoffset*/
0, /*tp_init*/
0, /*tp_alloc*/
0, /*tp_new*/
PyType_Spec bytesiobuf_spec = {
.name = "_io._BytesIOBuffer",
.basicsize = sizeof(bytesiobuf),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_IMMUTABLETYPE | Py_TPFLAGS_DISALLOW_INSTANTIATION),
.slots = bytesiobuf_slots,
};
1 change: 0 additions & 1 deletion Tools/c-analyzer/cpython/globals-to-fix.tsv
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Expand Up @@ -318,7 +318,6 @@ Python/instrumentation.c - _PyInstrumentation_MISSING -
## static types

Modules/_io/bufferedio.c - PyBufferedIOBase_Type -
Modules/_io/bytesio.c - _PyBytesIOBuffer_Type -
Modules/_io/iobase.c - PyIOBase_Type -
Modules/_io/iobase.c - PyRawIOBase_Type -
Modules/_io/textio.c - PyTextIOBase_Type -
Expand Down