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gh-112075: Enable freeing with qsbr and fallback to lock on key changed by DinoV · Pull Request #116336 · python/cpython · GitHub

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gh-112075: Enable freeing with qsbr and fallback to lock on key changed #116336

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Merged
markshannon merged 1 commit into from
Mar 5, 2024
Conversation 2 Commits 1 Checks 0 Files changed
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gh-112075: Enable freeing with qsbr and fallback to lock on key changed #116336

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9 changes: 3 additions & 6 deletions Objects/dictobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -183,9 +183,6 @@ set_values(PyDictObject *mp, PyDictValues *values)
_Py_atomic_store_ptr_release(&mp->ma_values, values);
}

// Defined until we get QSBR
#define _PyMem_FreeQsbr PyMem_Free

#define LOCK_KEYS(keys) PyMutex_LockFlags(&keys->dk_mutex, _Py_LOCK_DONT_DETACH)
#define UNLOCK_KEYS(keys) PyMutex_Unlock(&keys->dk_mutex)

Expand Down Expand Up @@ -806,7 +803,7 @@ free_keys_object(PyDictKeysObject *keys, bool use_qsbr)
{
#ifdef Py_GIL_DISABLED
if (use_qsbr) {
_PyMem_FreeQsbr(keys);
_PyMem_FreeDelayed(keys);
return;
}
#endif
Expand Down Expand Up @@ -846,7 +843,7 @@ free_values(PyDictValues *values, bool use_qsbr)
int prefix_size = DICT_VALUES_SIZE(values);
#ifdef Py_GIL_DISABLED
if (use_qsbr) {
_PyMem_FreeQsbr(((char *)values)-prefix_size);
_PyMem_FreeDelayed(((char *)values)-prefix_size);
return;
}
#endif
Expand Down Expand Up @@ -6694,7 +6691,7 @@ _PyObject_StoreInstanceAttribute(PyObject *obj, PyDictValues *values,
#ifdef Py_GIL_DISABLED
// Try a thread-safe lookup to see if the index is already allocated
ix = unicodekeys_lookup_unicode_threadsafe(keys, name, hash);
if (ix == DKIX_EMPTY) {
if (ix == DKIX_EMPTY || ix == DKIX_KEY_CHANGED) {
// Lock keys and do insert
LOCK_KEYS(keys);
ix = insert_into_splitdictkeys(keys, name, hash);
Expand Down
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