Skip to content

GH-132983: remove empty_bytes from _zstd module state #133785

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
May 9, 2025
Merged

GH-132983: remove empty_bytes from _zstd module state #133785

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
58275c4
zstd: remove empty_bytes from module state
AA-Turner May 9, 2025
e7a4d34
delete redundant comment
AA-Turner May 9, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 0 additions & 9 deletions Modules/_zstd/_zstdmodule.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -587,11 +587,6 @@ do { \
_zstd_state* const mod_state = get_zstd_state(m);

/* Reusable objects & variables */
mod_state->empty_bytes = PyBytes_FromStringAndSize(NULL, 0);
if (mod_state->empty_bytes == NULL) {
return -1;
}

mod_state->CParameter_type = NULL;
mod_state->DParameter_type = NULL;

Expand Down Expand Up @@ -694,8 +689,6 @@ _zstd_traverse(PyObject *module, visitproc visit, void *arg)
{
_zstd_state* const mod_state = get_zstd_state(module);

Py_VISIT(mod_state->empty_bytes);

Py_VISIT(mod_state->ZstdDict_type);
Py_VISIT(mod_state->ZstdCompressor_type);

Expand All @@ -713,8 +706,6 @@ _zstd_clear(PyObject *module)
{
_zstd_state* const mod_state = get_zstd_state(module);

Py_CLEAR(mod_state->empty_bytes);

Py_CLEAR(mod_state->ZstdDict_type);
Py_CLEAR(mod_state->ZstdCompressor_type);

Expand Down
2 changes: 0 additions & 2 deletions Modules/_zstd/_zstdmodule.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -35,8 +35,6 @@ extern PyType_Spec zstd_compressor_type_spec;
extern PyType_Spec zstd_decompressor_type_spec;

struct _zstd_state {
PyObject *empty_bytes;

PyTypeObject *ZstdDict_type;
PyTypeObject *ZstdCompressor_type;
PyTypeObject *ZstdDecompressor_type;
Expand Down
20 changes: 2 additions & 18 deletions Modules/_zstd/decompressor.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -290,13 +290,7 @@ decompress_impl(ZstdDecompressor *self, ZSTD_inBuffer *in,
/* The first AFE check for setting .at_frame_edge flag */
if (type == TYPE_ENDLESS_DECOMPRESSOR) {
if (self->at_frame_edge && in->pos == in->size) {
_zstd_state* const mod_state = PyType_GetModuleState(Py_TYPE(self));
if (mod_state == NULL) {
return NULL;
}
ret = mod_state->empty_bytes;
Py_INCREF(ret);
return ret;
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
}
}

Expand Down Expand Up @@ -747,16 +741,8 @@ _zstd_ZstdDecompressor_unused_data_get_impl(ZstdDecompressor *self)
{
PyObject *ret;

/* Thread-safe code */
Py_BEGIN_CRITICAL_SECTION(self);

if (!self->eof) {
_zstd_state* const mod_state = PyType_GetModuleState(Py_TYPE(self));
if (mod_state == NULL) {
return NULL;
}
ret = mod_state->empty_bytes;
Py_INCREF(ret);
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
}
else {
if (self->unused_data == NULL) {
Expand All @@ -772,8 +758,6 @@ _zstd_ZstdDecompressor_unused_data_get_impl(ZstdDecompressor *self)
}
}

Py_END_CRITICAL_SECTION();

return ret;
}

Expand Down
Loading