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* gh-111863: Rename `Py_NOGIL` to `Py_GIL_DISABLED` (#111864)Hugo van Kemenade2023-11-201-13/+13
| | | Rename Py_NOGIL to Py_GIL_DISABLED
* gh-112026: Restore removed private C API (#112115)Victor Stinner2023-11-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Restore removed private C API functions, macros and structures which have no simple replacement for now: * _PyDict_GetItem_KnownHash() * _PyDict_NewPresized() * _PyHASH_BITS * _PyHASH_IMAG * _PyHASH_INF * _PyHASH_MODULUS * _PyHASH_MULTIPLIER * _PyLong_Copy() * _PyLong_FromDigits() * _PyLong_New() * _PyLong_Sign() * _PyObject_CallMethodId() * _PyObject_CallMethodNoArgs() * _PyObject_CallMethodOneArg() * _PyObject_CallOneArg() * _PyObject_EXTRA_INIT * _PyObject_FastCallDict() * _PyObject_GetAttrId() * _PyObject_Vectorcall() * _PyObject_VectorcallMethod() * _PyStack_AsDict() * _PyThread_CurrentFrames() * _PyUnicodeWriter structure * _PyUnicodeWriter_Dealloc() * _PyUnicodeWriter_Finish() * _PyUnicodeWriter_Init() * _PyUnicodeWriter_Prepare() * _PyUnicodeWriter_PrepareKind() * _PyUnicodeWriter_WriteASCIIString() * _PyUnicodeWriter_WriteChar() * _PyUnicodeWriter_WriteLatin1String() * _PyUnicodeWriter_WriteStr() * _PyUnicodeWriter_WriteSubstring() * _PyUnicode_AsString() * _PyUnicode_FromId() * _PyVectorcall_Function() * _Py_HashDouble() * _Py_HashPointer() * _Py_IDENTIFIER() * _Py_c_abs() * _Py_c_diff() * _Py_c_neg() * _Py_c_pow() * _Py_c_prod() * _Py_c_quot() * _Py_c_sum() * _Py_static_string() * _Py_static_string_init()
* gh-111569: Implement Python critical section API (gh-111571)Sam Gross2023-11-081-2/+6
| | | | | | | | Critical sections are helpers to replace the global interpreter lock with finer grained locking. They provide similar guarantees to the GIL and avoid the deadlock risk that plain locking involves. Critical sections are implicitly ended whenever the GIL would be released. They are resumed when the GIL would be acquired. Nested critical sections behave as if the sections were interleaved.
* gh-111506: Implement Py_SET_REFCNT() as opaque function in limited C API ↵Victor Stinner2023-11-031-2/+11
| | | | | | | | (#111508) In the limited C API version 3.13, Py_SET_REFCNT() function is now implemented as an opaque function call. Add _Py_SetRefcnt() to the stable ABI.
* gh-110481: Fix _Py_ThreadId for non-free-threaded mode (gh-111503)Donghee Na2023-10-301-3/+1
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* gh-110481: Implement biased reference counting (gh-110764)Sam Gross2023-10-301-3/+188
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* gh-109496: Detect Py_DECREF() after dealloc in debug mode (#109539)Victor Stinner2023-09-181-6/+4
| | | | | | | | | On a Python built in debug mode, Py_DECREF() now calls _Py_NegativeRefcount() if the object is a dangling pointer to deallocated memory: memory filled with 0xDD "dead byte" by the debug hook on memory allocators. The fix is to check the reference count *before* checking for _Py_IsImmortal(). Add test_decref_freed_object() to test_capi.test_misc.
* gh-108511: Add C API functions which do not silently ignore errors (GH-109025)Serhiy Storchaka2023-09-171-0/+4
| | | | | | | | | Add the following functions: * PyObject_HasAttrWithError() * PyObject_HasAttrStringWithError() * PyMapping_HasKeyWithError() * PyMapping_HasKeyStringWithError()
* gh-108765: Move standard includes to Python.h (#108769)Victor Stinner2023-09-011-2/+0
| | | | | | | | | | | | * Move <ctype.h>, <limits.h> and <stdarg.h> standard includes to Python.h. * Move "pystats.h" include from object.h to Python.h. * Remove redundant "pymem.h" include in objimpl.h and "pyport.h" include in pymem.h; Python.h already includes them earlier. * Remove redundant <wchar.h> include in unicodeobject.h; Python.h already includes it. * Move _SGI_MP_SOURCE define from Python.h to pyport.h. * pycore_condvar.h includes explicitly <unistd.h> for the _POSIX_THREADS macro.
* gh-108634: Py_TRACE_REFS uses a hash table (#108663)Victor Stinner2023-08-311-21/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Python built with "configure --with-trace-refs" (tracing references) is now ABI compatible with Python release build and debug build. Moreover, it now also supports the Limited API. Change Py_TRACE_REFS build: * Remove _PyObject_EXTRA_INIT macro. * The PyObject structure no longer has two extra members (_ob_prev and _ob_next). * Use a hash table (_Py_hashtable_t) to trace references (all objects): PyInterpreterState.object_state.refchain. * Py_TRACE_REFS build is now ABI compatible with release build and debug build. * Limited C API extensions can now be built with Py_TRACE_REFS: xxlimited, xxlimited_35, _testclinic_limited. * No longer rename PyModule_Create2() and PyModule_FromDefAndSpec2() functions to PyModule_Create2TraceRefs() and PyModule_FromDefAndSpec2TraceRefs(). * _Py_PrintReferenceAddresses() is now called before finalize_interp_delete() which deletes the refchain hash table. * test_tracemalloc find_trace() now also filters by size to ignore the memory allocated by _PyRefchain_Trace(). Test changes for Py_TRACE_REFS: * Add test.support.Py_TRACE_REFS constant. * Add test_sys.test_getobjects() to test sys.getobjects() function. * test_exceptions skips test_recursion_normalizing_with_no_memory() and test_memory_error_in_PyErr_PrintEx() if Python is built with Py_TRACE_REFS. * test_repl skips test_no_memory(). * test_capi skisp test_set_nomemory().
* gh-106320: Remove private _PyObject_GetState() (#108606)Victor Stinner2023-08-291-6/+0
| | | | Move the private _PyObject_GetState() function to the internal C API (pycore_object.h).
* gh-107955 Remove old comment about increasing the reference count in usage ↵brandonardenwalli2023-08-161-2/+0
| | | | of Py_None (#107993)
* gh-105059: Fix MSCV compiler warning on PyObject union (#107239)Victor Stinner2023-07-251-0/+11
| | | | Use pragma to ignore the MSCV compiler warning on the PyObject nameless union.
* gh-105059: Use GCC/clang extension for PyObject union (#107232)Victor Stinner2023-07-251-0/+5
| | | | | Anonymous union is new in C11. To prevent compiler warning when using -pedantic compiler option, use Clang and GCC extension on C99 and older.
* gh-102304: Rename _Py_IncRefTotal_DO_NOT_USE_THIS() (#107193)Victor Stinner2023-07-241-9/+4
| | | | | * Rename _Py_IncRefTotal_DO_NOT_USE_THIS() to _Py_INCREF_IncRefTotal() * Rename _Py_DecRefTotal_DO_NOT_USE_THIS() to _Py_DECREF_DecRefTotal() * Remove temporary _Py_INC_REFTOTAL() and _Py_DEC_REFTOTAL() macros
* gh-106521: Add PyObject_GetOptionalAttr() function (GH-106522)Serhiy Storchaka2023-07-111-0/+4
| | | | | | It is a new name of former _PyObject_LookupAttr(). Add also PyObject_GetOptionalAttrString().
* gh-106572: Convert PyObject_DelAttr() to a function (#106611)Victor Stinner2023-07-111-0/+2
| | | | | | | | * Convert PyObject_DelAttr() and PyObject_DelAttrString() macros to functions. * Add PyObject_DelAttr() and PyObject_DelAttrString() functions to the stable ABI. * Replace PyObject_SetAttr(obj, name, NULL) with PyObject_DelAttr(obj, name).
* gh-105387: Limited C API implements Py_INCREF() as func (#105388)Victor Stinner2023-06-141-8/+10
| | | | | In the limited C API version 3.12, Py_INCREF() and Py_DECREF() functions are now implemented as opaque function calls to hide implementation details.
* gh-102304: Fix Py_INCREF() for limited C API 3.9 (#105550)Victor Stinner2023-06-091-2/+14
| | | | | | When Python is built in debug mode (Py_REF_DEBUG macro), Py_INCREF() and Py_DECREF() of the limited C API 3.9 (and older) now call Py_IncRef() and Py_DecRef(), since _Py_IncRef() and _Py_DecRef() were added to Python 3.10.
* gh-102304: Fix Py_INCREF() stable ABI in debug mode (#104763)Victor Stinner2023-06-061-14/+8
| | | | | | | | | | | When Python is built in debug mode (if the Py_REF_DEBUG macro is defined), the Py_INCREF() and Py_DECREF() function are now always implemented as opaque functions to avoid leaking implementation details like the "_Py_RefTotal" variable or the _Py_DecRefTotal_DO_NOT_USE_THIS() function. * Remove _Py_IncRefTotal_DO_NOT_USE_THIS() and _Py_DecRefTotal_DO_NOT_USE_THIS() from the stable ABI. * Remove _Py_NegativeRefcount() from limited C API.
* gh-102304: Fix 2 New Stable ABI Functions (gh-104762)Eric Snow2023-05-301-1/+1
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* gh-102304: Temporarily Bump Py_LIMITED_API for 2 New Functions (#104766)Eric Snow2023-05-221-1/+1
| | | Quick and dirty.
* gh-103509: PEP 697 -- Limited C API for Extending Opaque Types (GH-103511)Petr Viktorin2023-05-041-0/+5
| | | | Co-authored-by: Oleg Iarygin <oleg@arhadthedev.net> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
* gh-84436: Implement Immortal Objects (gh-19474)Eddie Elizondo2023-04-221-14/+119
| | | | | | | | | This is the implementation of PEP683 Motivation: The PR introduces the ability to immortalize instances in CPython which bypasses reference counting. Tagging objects as immortal allows up to skip certain operations when we know that the object will be around for the entire execution of the runtime. Note that this by itself will bring a performance regression to the runtime due to the extra reference count checks. However, this brings the ability of having truly immutable objects that are useful in other contexts such as immutable data sharing between sub-interpreters.
* GH-101291: Rearrange the size bits in PyLongObject (GH-102464)Mark Shannon2023-03-221-1/+7
| | | | | | | | | | * Eliminate all remaining uses of Py_SIZE and Py_SET_SIZE on PyLongObject, adding asserts. * Change layout of size/sign bits in longobject to support future addition of immortal ints and tagged medium ints. * Add functions to hide some internals of long object, and for setting sign and digit count. * Replace uses of IS_MEDIUM_VALUE macro with _PyLong_IsCompact().
* gh-102304: Move _Py_RefTotal to _PyRuntimeState (gh-102543)Eric Snow2023-03-201-7/+2
| | | | | | | The essentially eliminates the global variable, with the associated benefits. This is also a precursor to isolating this bit of state to PyInterpreterState. Folks that currently read _Py_RefTotal directly would have to start using _Py_GetGlobalRefTotal() instead. https://github.com/python/cpython/issues/102304
* gh-102304: Consolidate Direct Usage of _Py_RefTotal (gh-102514)Eric Snow2023-03-081-4/+21
| | | | | This simplifies further changes to _Py_RefTotal (e.g. make it atomic or move it to PyInterpreterState). https://github.com/python/cpython/issues/102304
* gh-98724: Fix Py_CLEAR() macro side effects (#99100) (#100070)Victor Stinner2022-12-071-7/+36
| | | | | | | | | | | | | | The Py_CLEAR(), Py_SETREF() and Py_XSETREF() macros now only evaluate their arguments once. If an argument has side effects, these side effects are no longer duplicated. Use temporary variables to avoid duplicating side effects of macro arguments. If available, use _Py_TYPEOF() to avoid type punning. Otherwise, use memcpy() for the assignment to prevent a miscompilation with strict aliasing caused by type punning. Add _Py_TYPEOF() macro: __typeof__() on GCC and clang. Add test_py_clear() and test_py_setref() unit tests to _testcapi.
* Revert "gh-98724: Fix Py_CLEAR() macro side effects" (#99737)Victor Stinner2022-11-241-12/+7
| | | | | Revert "gh-98724: Fix Py_CLEAR() macro side effects (#99100)" This reverts commit c03e05c2e72f3ea5e797389e7d1042eef85ad37a.
* gh-98724: Fix Py_CLEAR() macro side effects (#99100)Victor Stinner2022-11-091-7/+12
| | | | | | | The Py_CLEAR(), Py_SETREF() and Py_XSETREF() macros now only evaluate their argument once. If an argument has side effects, these side effects are no longer duplicated. Add test_py_clear() and test_py_setref() unit tests to _testcapi.
* Fix Py_INCREF() statistics in limited C API 3.10 (#96120)Victor Stinner2022-08-291-1/+1
| | | | | In the limited C API with a debug build, Py_INCREF() is implemented by calling _Py_IncRef() which calls Py_INCREF(). Only call _Py_INCREF_STAT_INC() once.
* GH-95245: Move weakreflist into the pre-header. (GH-95996)Mark Shannon2022-08-161-2/+8
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* gh-93274: Expose receiving vectorcall in the Limited API (GH-95717)Petr Viktorin2022-08-081-1/+8
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* gh-94673: Add _PyStaticType_InitBuiltin() (#95152)Eric Snow2022-07-251-0/+3
| | | | | | | | | | | | This is the first of several precursors to storing tp_subclasses (and tp_weaklist) on the interpreter state for static builtin types. We do the following: * add `_PyStaticType_InitBuiltin()` * add `_Py_TPFLAGS_STATIC_BUILTIN` * set it on all static builtin types in `_PyStaticType_InitBuiltin()` * shuffle some code around to be able to use _PyStaticType_InitBuiltin() * rename `_PyStructSequence_InitType()` to `_PyStructSequence_InitBuiltinWithFlags()` * add `_PyStructSequence_InitBuiltin()`.
* gh-87347: Add parenthesis around macro arguments (#93915)Victor Stinner2022-06-201-7/+7
| | | Add unit test on Py_MEMBER_SIZE() and some other macros.
* gh-60074: add new stable API function PyType_FromMetaclass (GH-93012)Wenzel Jakob2022-05-271-0/+3
| | | | | | | | Added a new stable API function ``PyType_FromMetaclass``, which mirrors the behavior of ``PyType_FromModuleAndSpec`` except that it takes an additional metaclass argument. This is, e.g., useful for language binding tools that need to store additional information in the type object.
* Improve object stats (#92845)Mark Shannon2022-05-161-1/+5
| | | | | * Add incref/decref stats * Show ratios for allocation in summary
* gh-89653: PEP 670: Use PyObject* type for parameters (#92694)Victor Stinner2022-05-111-3/+4
| | | | | | | | | Use the PyObject* type for parameters of static inline functions: * Py_SIZE(): same parameter type than PyObject_Size() * PyList_GET_SIZE(), PyList_SET_ITEM(): same parameter type than PyList_Size() and PyList_SetItem() * PyTuple_GET_SIZE(), PyTuple_SET_ITEM(): same parameter type than PyTuple_Size() and PyTuple_SetItem().
* gh-91321: Fix _PyObject_EXTRA_INIT for C++ (#92396)Victor Stinner2022-05-061-1/+1
| | | | | | | | In C++, the _PyObject_EXTRA_INIT macro now uses nullptr, rather than 0, to initialize the _ob_next and _ob_prev members of the PyObject structure. Fix test_cppext failure when Python is built with ./configure --with-trace-refs.
* gh-91321: Add _Py_NULL macro (#92253)Victor Stinner2022-05-031-2/+2
| | | | | | | | Fix C++ compiler warnings: "zero as null pointer constant" (clang -Wzero-as-null-pointer-constant). * Add the _Py_NULL macro used by static inline functions to use nullptr in C++. * Replace NULL with nullptr in _testcppext.cpp.
* gh-92135: Rename _Py_reinterpret_cast() to _Py_CAST() (#92230)Victor Stinner2022-05-031-3/+3
| | | Rename also _Py_static_cast() to _Py_STATIC_CAST().
* gh-91320: Add _Py_reinterpret_cast() macro (#91959)Victor Stinner2022-04-271-3/+4
| | | | | | | | | | | | | | Fix C++ compiler warnings about "old-style cast" (g++ -Wold-style-cast) in the Python C API. Use C++ reinterpret_cast<> and static_cast<> casts when the Python C API is used in C++. Example of fixed warning: Include/object.h:107:43: error: use of old-style cast to ‘PyObject*’ {aka ‘struct _object*’} [-Werror=old-style-cast] #define _PyObject_CAST(op) ((PyObject*)(op)) Add _Py_reinterpret_cast() and _Py_static_cast() macros.
* gh-89653: PEP 670: Functions don't cast pointers (#91697)Victor Stinner2022-04-251-35/+66
| | | | | | | | | | | | | | | | | | | | | In the limited C API version 3.11 and newer, the following functions no longer cast their object pointer argument with _PyObject_CAST() or _PyObject_CAST_CONST(): * Py_REFCNT(), Py_TYPE(), Py_SIZE() * Py_SET_REFCNT(), Py_SET_TYPE(), Py_SET_SIZE() * Py_IS_TYPE() * Py_INCREF(), Py_DECREF() * Py_XINCREF(), Py_XDECREF() * Py_NewRef(), Py_XNewRef() * PyObject_TypeCheck() * PyType_Check() * PyType_CheckExact() Split Py_DECREF() implementation in 3 versions to make the code more readable. Update the xxlimited.c extension, which uses the limited C API version 3.11, to pass PyObject* to these functions.
* gh-91768: C API no longer use "const PyObject*" type (#91769)Victor Stinner2022-04-211-13/+9
| | | | | | | | | | | | | Py_REFCNT(), Py_TYPE(), Py_SIZE() and Py_IS_TYPE() functions argument type is now "PyObject*", rather than "const PyObject*". * Replace also "const PyObject*" with "PyObject*" in functions: * _Py_strhex_impl() * _Py_strhex_with_sep() * _Py_strhex_bytes_with_sep() * Remove _PyObject_CAST_CONST() and _PyVarObject_CAST_CONST() macros. * Py_IS_TYPE() can now use Py_TYPE() in its implementation.
* bpo-26579: Add object.__getstate__(). (GH-2821)Serhiy Storchaka2022-04-061-0/+5
| | | | | | | Copying and pickling instances of subclasses of builtin types bytearray, set, frozenset, collections.OrderedDict, collections.deque, weakref.WeakSet, and datetime.tzinfo now copies and pickles instance attributes implemented as slots.
* bpo-45459: C API uses type names rather than structure names (GH-31528)Victor Stinner2022-02-241-4/+4
| | | | Thanks to the new pytypedefs.h, it becomes to use type names like PyObject rather like structure names like "struct _object".
* bpo-45459: Add pytypedefs.h header file (GH-31527)Victor Stinner2022-02-241-8/+3
| | | | | | | | | | | | | | | | | | Move forward declarations of Python C API types to a new pytypedefs.h header file to solve interdependency issues between header files. pytypedefs.h contains forward declarations of the following types: * PyCodeObject * PyFrameObject * PyGetSetDef * PyInterpreterState * PyLongObject * PyMemberDef * PyMethodDef * PyModuleDef * PyObject * PyThreadState * PyTypeObject
* bpo-45490: Rename static inline functions (GH-31217)Victor Stinner2022-02-111-29/+29
| | | | | | | | | | | | When a static inline function is wrapped by a macro which casts its arguments to the expected type, there is no need that the function has a different name than the macro. Use the same name for the macro and the function to avoid confusion. Rename _PyUnicode_get_wstr_length() to PyUnicode_WSTR_LENGTH(). Don't rename static inline _Py_NewRef() and _Py_XNewRef() functions, since the C API exports Py_NewRef() and Py_XNewRef() functions as regular functions. The name cannot be reused in this case.
* bpo-46417: Add _PyType_CAST() macro (GH-30760)Victor Stinner2022-01-211-0/+2
| | | | In debug mode, the macro makes sure that its argument is a type using an assertion.
* Revert "bpo-46131: add fastpath for PyFloat_Check() (GH-30200)" (GH-30208)Raymond Hettinger2021-12-191-1/+0
| | | This reverts commit 2ef06d412531d1163dbc72877c88aedf3ed82a25.
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