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GH-91052: Add C API for watching dictionaries (GH-31787)

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Carl Meyer 2022-10-06 17:08:00 -07:00 • committed by GitHub
parent 683ab85955
commit a4b7794887
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10 changed files with 487 additions and 17 deletions
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27
Include/internal/pycore_dict.h
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@ -154,7 +154,32 @@ struct _dictvalues {
extern uint64_t _pydict_global_version;
#define DICT_NEXT_VERSION() (++_pydict_global_version)
#define DICT_MAX_WATCHERS 8
#define DICT_VERSION_INCREMENT (1 << DICT_MAX_WATCHERS)
#define DICT_VERSION_MASK (DICT_VERSION_INCREMENT - 1)
#define DICT_NEXT_VERSION() (_pydict_global_version += DICT_VERSION_INCREMENT)
void
_PyDict_SendEvent(int watcher_bits,
PyDict_WatchEvent event,
PyDictObject *mp,
PyObject *key,
PyObject *value);
static inline uint64_t
_PyDict_NotifyEvent(PyDict_WatchEvent event,
PyDictObject *mp,
PyObject *key,
PyObject *value)
{
int watcher_bits = mp->ma_version_tag & DICT_VERSION_MASK;
if (watcher_bits) {
_PyDict_SendEvent(watcher_bits, event, mp, key, value);
return DICT_NEXT_VERSION() | watcher_bits;
}
return DICT_NEXT_VERSION();
}
extern PyObject *_PyObject_MakeDictFromInstanceAttributes(PyObject *obj, PyDictValues *values);
extern PyObject *_PyDict_FromItems(

2
Include/internal/pycore_interp.h
View file

@ -144,6 +144,8 @@ struct _is {
// Initialized to _PyEval_EvalFrameDefault().
_PyFrameEvalFunction eval_frame;
PyDict_WatchCallback dict_watchers[DICT_MAX_WATCHERS];
Py_ssize_t co_extra_user_count;
freefunc co_extra_freefuncs[MAX_CO_EXTRA_USERS];