8000 bpo-40077: Convert _queuemodule to use heap types by erlend-aasland · Pull Request #23136 · python/cpython · GitHub
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bpo-40077: Convert _queuemodule to use heap types #23136

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Merged
merged 5 commits into from
Nov 7, 2020
Merged

bpo-40077: Convert _queuemodule to use heap types #23136

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2c605d9
Convert queue to use heap types
Nov 3, 2020
fd4243a
Establish global state and add type & exc to it
Nov 3, 2020
532e7ab
Add NEWS
Nov 3, 2020
5966894
Migrate from global to module state
Nov 3, 2020
b939524
Address review: Add module m_traverse/m_clear/m_free
Nov 5, 2020
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Migrate from global to module state
  • Loading branch information
Erlend E. Aasland committed Nov 3, 2020
commit 5966894d25ff4609985951059f928ebd3141746d
54 changes: 31 additions & 23 deletions Modules/_queuemodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7,13 +7,16 @@ typedef struct {
PyObject *EmptyError;
} simplequeue_state;

static simplequeue_state global_state;

static simplequeue_state *
simplequeue_get_state()
simplequeue_get_state(PyObject *module)
{
return &global_state;
simplequeue_state *state = PyModule_GetState(module);
assert(state);
return state;
}
static struct PyModuleDef queuemodule;
#define simplequeue_get_state_by_type(tp) \
(simplequeue_get_state(_PyType_GetModuleByDef(type, &queuemodule)))

typedef struct {
PyObject_HEAD
Expand All @@ -26,9 +29,9 @@ typedef struct {

/*[clinic input]
module _queue
class _queue.SimpleQueue "simplequeueobject *" "simplequeue_get_state()->SimpleQueueType"
class _queue.SimpleQueue "simplequeueobject *" "simplequeue_get_state_by_type(type)->SimpleQueueType"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=ffce1ca094e64f3a]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=0a4023fe4d198c8d]*/

static void
simplequeue_dealloc(simplequeueobject *self)
Expand Down Expand Up @@ -166,6 +169,9 @@ simplequeue_pop_item(simplequeueobject *self)

/*[clinic input]
_queue.SimpleQueue.get

cls: defining_class
/
block: bool = True
timeout: object = None

Expand All @@ -182,9 +188,9 @@ in that case).
[clinic start generated code]*/

static PyObject *
_queue_SimpleQueue_get_impl(simplequeueobject *self, int block,
PyObject *timeout)
/*[clinic end generated code: output=ec82a7157dcccd1a input=4bf691f9f01fa297]*/
_queue_SimpleQueue_get_impl(simplequeueobject *self, PyTypeObject *cls,
int block, PyObject *timeout)
/*[clinic end generated code: output=1969aefa7db63666 input=5fc4d56b9a54757e]*/
{
_PyTime_t endtime = 0;
_PyTime_t timeout_val;
Expand Down Expand Up @@ -236,8 +242,10 @@ _queue_SimpleQueue_get_impl(simplequeueobject *self, int block,
return NULL;
}
if (r == PY_LOCK_FAILURE) {
PyObject *module = PyType_GetModule(cls);
simplequeue_state *state = simplequeue_get_state(module);
/* Timed out */
PyErr_SetNone(simplequeue_get_state()->EmptyError);
PyErr_SetNone(state->EmptyError);
return NULL;
}
self->locked = 1;
Expand All @@ -262,17 +270,21 @@ _queue_SimpleQueue_get_impl(simplequeueobject *self, int block,
/*[clinic input]
_queue.SimpleQueue.get_nowait

cls: defining_class
/

Remove and return an item from the queue without blocking.

Only get an item if one is immediately available. Otherwise
raise the Empty exception.
[clinic start generated code]*/

static PyObject *
_queue_SimpleQueue_get_nowait_impl(simplequeueobject *self)
/*[clinic end generated code: output=a89731a75dbe4937 input=6fe5102db540a1b9]*/
_queue_SimpleQueue_get_nowait_impl(simplequeueobject *self,
PyTypeObject *cls)
/*[clinic end generated code: output=620c58e2750f8b8a input=842f732bf04216d3]*/
{
return _queue_SimpleQueue_get_impl(self, 0, Py_None);
return _queue_SimpleQueue_get_impl(self, cls, 0, Py_None);
}

/*[clinic input]
Expand Down Expand Up @@ -347,29 +359,25 @@ PyDoc_STRVAR(queue_module_doc,
This module is an implementation detail, please do not use it directly.");

static struct PyModuleDef queuemodule = {
PyModuleDef_HEAD_INIT,
"_queue",
queue_module_doc,
-1,
NULL,
NULL,
NULL,
NULL,
NULL
.m_base = PyModuleDef_HEAD_INIT,
.m_name = "_queue",
.m_doc = queue_module_doc,
.m_size = sizeof(simplequeue_state),
};


PyMODINIT_FUNC
PyInit__queue(void)
{
PyObject *m;
simplequeue_state *state = simplequeue_get_state();
simplequeue_state *state;

/* Create the module */
m = PyModule_Create(&queuemodule);
if (m == NULL)
return NULL;

state = simplequeue_get_state(m);
state->EmptyError = PyErr_NewExceptionWithDoc(
"_queue.Empty",
"Exception raised by Queue.get(block=0)/get_nowait().",
Expand Down
58 changes: 27 additions & 31 deletions Modules/clinic/_queuemodule.c.h
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