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mpage 5d21d884b6
gh-111926: Avoid locking in PyType_IsSubtype (#117275) 
Read the MRO in a thread-unsafe way in `PyType_IsSubtype` to avoid locking. Fixing this is tracked in #117306. 

The motivation for this change is in support of making weakrefs thread-safe in free-threaded builds:

`WeakValueDictionary` uses a special dictionary function, `_PyDict_DelItemIf`
to remove dead weakrefs from the dictionary. `_PyDict_DelItemIf` removes a key
if a user supplied predicate evaluates to true for the value associated with
the key. Crucially for the `WeakValueDictionary` use case, the predicate
evaluation + deletion sequence is atomic, provided that the predicate doesn’t
suspend. The predicate used by `WeakValueDictionary` includes a subtype check,
which we must ensure doesn't suspend in free-threaded builds.
 		2024-03-29 13:42:02 -04:00
..
clinic gh-116621: Set manual critical section for list.extend (gh-116657) 2024-03-13 07:28:23 +09:00
mimalloc gh-115103: Delay reuse of mimalloc pages that store PyObjects (#115435) 2024-03-06 09:42:11 -05:00
stringlib gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
README
…
abstract.c gh-116316: Fix typo in `UNARY_FUNC(PyNumber_Positive)` macros (GH-116317) 2024-03-04 17:57:01 +00:00
boolobject.c gh-111999: Add signatures and improve docstrings for builtins (GH-112000) 2023-11-13 09:13:49 +02:00
bytearrayobject.c gh-115323: Add meaningful error message for using bytearray.extend with str (#115332) 2024-02-24 18:34:45 -05:00
bytes_methods.c gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
bytesobject.c gh-87193: Support bytes objects with refcount > 1 in _PyBytes_Resize() (GH-117160) 2024-03-25 16:32:11 +01:00
call.c gh-106320: Remove _PyFunction_Vectorcall() API (#107071) 2023-07-22 21:44:33 +00:00
capsule.c gh-108240: Add pycore_capsule.h internal header file (#108596) 2023-08-29 01:20:02 +00:00
cellobject.c gh-117323: Make `cell` thread-safe in free-threaded builds (#117330) 2024-03-29 13:35:43 -04:00
classobject.c gh-113024: C API: Add PyObject_GenericHash() function (GH-113025) 2024-03-22 20:19:10 +02:00
codeobject.c gh-108716:: Remove _PyStaticCode_Init/Fini (#117141) 2024-03-22 01:27:48 +00:00
complexobject.c gh-109598: make PyComplex_RealAsDouble/ImagAsDouble use __complex__ (GH-109647) 2024-01-15 16:04:17 +01:00
descrobject.c gh-113024: C API: Add PyObject_GenericHash() function (GH-113025) 2024-03-22 20:19:10 +02:00
dictnotes.txt
…
dictobject.c gh-112075: Enable freeing with qsbr and fallback to lock on key changed (GH-116336) 2024-03-05 09:08:18 +00:00
enumobject.c gh-106320: Create pycore_modsupport.h header file (#106355) 2023-07-03 09:39:11 +00:00
exception_handling_notes.txt GH-105848: Simplify the arrangement of CALL's stack (GH-107788) 2023-08-09 18:19:39 +00:00
exceptions.c gh-114570: Add PythonFinalizationError exception (#115352) 2024-02-14 23:35:06 +01:00
fileobject.c gh-87193: Support bytes objects with refcount > 1 in _PyBytes_Resize() (GH-117160) 2024-03-25 16:32:11 +01:00
floatobject.c gh-116714: Handle errors correctly in `PyFloat_GetInfo` (#116715) 2024-03-13 12:38:03 +00:00
frame_layout.md gh-109094: replace frame->prev_instr by frame->instr_ptr (#109095) 2023-10-26 13:43:10 +00:00
frameobject.c gh-115756: make PyCode_GetFirstFree an unstable API (GH-115781) 2024-03-19 09:20:38 +00:00
funcobject.c gh-117045: Add code object to function version cache (#117028) 2024-03-21 12:37:41 -07:00
genericaliasobject.c gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
genobject.c gh-111968: Split _Py_async_gen_asend_freelist out of _Py_async_gen_fr… (gh-115546) 2024-02-17 10:03:10 +09:00
iterobject.c gh-106320: Remove private _PyEval function (#108433) 2023-08-24 20:25:22 +02:00
listobject.c GH-116939: Rewrite binarysort() (#116940) 2024-03-21 22:27:25 -05:00
listsort.txt GH-116939: Rewrite binarysort() (#116940) 2024-03-21 22:27:25 -05:00
lnotab_notes.txt Document the `co_lines` method on code objects (#113682) 2024-01-03 19:29:24 +00:00
locations.md
…
longobject.c gh-110819: Fix ‘kind’ may be used uninitialized warning in `longobject` (#116599) 2024-03-12 13:50:06 +03:00
memoryobject.c gh-111178: Avoid calling functions from incompatible pointer types in memoryobject.c (GH-112863) 2023-12-11 17:43:07 +01:00
methodobject.c gh-113024: C API: Add PyObject_GenericHash() function (GH-113025) 2024-03-22 20:19:10 +02:00
moduleobject.c gh-116437: Use new C API PyDict_Pop() to simplify the code (GH-116438) 2024-03-07 11:21:08 +02:00
namespaceobject.c gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
object.c gh-76785: Drop PyInterpreterID_Type (gh-117101) 2024-03-21 17:15:02 +00:00
object_layout.md gh-106293: Fix typos in Objects/object_layout.md (#106294) 2024-01-16 23:11:15 +00:00
object_layout_312.gv
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object_layout_312.png
…
object_layout_full_312.gv
…
object_layout_full_312.png
…
obmalloc.c gh-112075: Support freeing object memory via QSBR (#116344) 2024-03-08 09:56:36 -08:00
odictobject.c gh-112075: Add critical sections for most dict APIs (#114508) 2024-02-06 14:03:43 -08:00
picklebufobject.c gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
rangeobject.c gh-106320: Remove private _PyEval function (#108433) 2023-08-24 20:25:22 +02:00
setobject.c gh-112069: Make sets thread-safe with the GIL disabled (#113800) 2024-03-08 16:25:34 -05:00
sliceobject.c gh-111968: Rename freelist related struct names to Eric's suggestion (gh-115329) 2024-02-14 00:32:51 +00:00
structseq.c GH-108362: Incremental Cycle GC (GH-116206) 2024-03-20 08:54:42 +00:00
tupleobject.c gh-116381: Remove bad specializations, add fail stats (GH-116464) 2024-03-08 00:21:21 +08:00
typeobject.c gh-111926: Avoid locking in PyType_IsSubtype (#117275) 2024-03-29 13:42:02 -04:00
typeslots.inc
…
typeslots.py
…
typevarobject.c gh-110864: TypeVar constructor: Partially revert gh-110784, `constraints` cannot be `NULL` (#110922) 2023-10-16 15:01:04 +00:00
unicodectype.c
…
unicodeobject.c gh-113964: Don't prevent new threads until all non-daemon threads exit (#116677) 2024-03-19 14:40:20 -04:00
unicodetype_db.h gh-96954: Fix `make regen-unicodedata` in out-of-tree builds (#112118) 2023-11-15 16:42:17 +00:00
unionobject.c gh-108511: Add C API functions which do not silently ignore errors (GH-109025) 2023-09-17 14:23:31 +03:00
weakrefobject.c gh-111926: Simplify proxy creation logic (#116844) 2024-03-15 09:58:40 -04:00

README 

Source files for various builtin objects