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* gh-121040: Use __attribute__((fallthrough)) (#121044)Victor Stinner2024-06-271-10/+35
| | | | | | | | | | | | | Fix warnings when using -Wimplicit-fallthrough compiler flag. Annotate explicitly "fall through" switch cases with a new _Py_FALLTHROUGH macro which uses __attribute__((fallthrough)) if available. Replace "fall through" comments with _Py_FALLTHROUGH. Add _Py__has_attribute() macro. No longer define __has_attribute() macro if it's not defined. Move also _Py__has_builtin() at the top of pyport.h. Co-Authored-By: Nikita Sobolev <mail@sobolevn.me>
* gh-119613: Soft deprecate the Py_MEMCPY() macro (#120020)Victor Stinner2024-06-041-0/+1
| | | Use directly memcpy() instead.
* gh-112536: Define `_Py_THREAD_SANITIZER` on GCC when TSan is enabled (#117702)Sam Gross2024-04-101-0/+3
| | | | | The `__has_feature(thread_sanitizer)` is a Clang-ism. Although new versions of GCC implement `__has_feature`, the `defined(__has_feature)` check still fails on GCC so we don't use that code path.
* gh-112536: Add support for thread sanitizer (TSAN) (gh-112648)Samet YASLAN2023-12-301-0/+5
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* gh-65210: Add const qualifiers in PyArg_VaParseTupleAndKeywords() (GH-105958)Serhiy Storchaka2023-12-041-0/+8
| | | | | | | | | | | Change the declaration of the keywords parameter in functions PyArg_ParseTupleAndKeywords() and PyArg_VaParseTupleAndKeywords() from `char **` to `char * const *` in C and `const char * const *` in C++. It makes these functions compatible with argument of type `const char * const *`, `const char **` or `char * const *` in C++ and `char * const *` in C without explicit type cast. Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>
* gh-111569: Fix critical sections test on WebAssembly (GH-111897)Sam Gross2023-11-091-0/+8
| | | | | | | | This adds a macro `Py_CAN_START_THREADS` that corresponds to the Python function `test.support.threading_helper.can_start_thread()`. WASI and some Emscripten builds do not have a working pthread implementation. This macro is used to guard the critical sections C API tests that require a working threads implementation.
* gh-85283: If Py_LIMITED_API is defined, undefine Py_BUILD_CORE (#110725)Victor Stinner2023-10-111-4/+9
| | | | | | | | | | | If the Py_LIMITED_API macro is defined, Py_BUILD_CORE, Py_BUILD_CORE_BUILTIN and Py_BUILD_CORE_MODULE macros are now undefined by Python.h. Only undefine these 3 macros after including "exports.h" which uses them to define PyAPI_FUNC(), PyAPI_DATA() and PyMODINIT_FUNC macros. Remove hacks (undefine manually the 3 Py_BUILD_CORE macros) in Modules/_testcapi/parts.h and Modules/_testclinic_limited.c.
* gh-104469: Disallow using Py_LIMITED_API with Py_BUILD_CORE (#109690)Victor Stinner2023-09-211-0/+4
| | | | Fix make check-c-globals: complete USE_LIMITED_C_API list of the c-analyzer.
* gh-108765: Move export code from pyport.h to exports.h (#108855)Victor Stinner2023-09-031-71/+0
| | | There is no API change, since pyport.h includes exports.h.
* gh-108765: Move stat() fiddling from pyport.h to fileutils.h (#108854)Victor Stinner2023-09-031-37/+0
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* gh-108765: Python.h no longer includes <ctype.h> (#108831)Victor Stinner2023-09-031-38/+0
| | | | | | | | | | | | | | | | | | | | | | | Remove <ctype.h> in C files which don't use it; only sre.c and _decimal.c still use it. Remove _PY_PORT_CTYPE_UTF8_ISSUE code from pyport.h: * Code added by commit b5047fd01948ab108edcc1b3c2c901d915814cfd in 2004 for MacOSX and FreeBSD. * Test removed by commit 52ddaefb6bab1a74ecffe8519c02735794ebfbe1 in 2007, since Python str type now uses locale independent functions like Py_ISALPHA() and Py_TOLOWER() and the Unicode database. Modules/_sre/sre.c replaces _PY_PORT_CTYPE_UTF8_ISSUE with new functions: sre_isalnum(), sre_tolower(), sre_toupper(). Remove unused includes: * _localemodule.c: remove <stdio.h>. * getargs.c: remove <float.h>. * dynload_win.c: remove <direct.h>, it no longer calls _getcwd() since commit fb1f68ed7cc1536482d1debd70a53c5442135fe2 (in 2001).
* gh-108765: Python.h no longer includes <sys/time.h> (#108775)Victor Stinner2023-09-021-19/+0
| | | | | | | | | Python.h no longer includes <time.h>, <sys/select.h> and <sys/time.h> standard header files. * Add <time.h> include to xxsubtype.c. * Add <sys/time.h> include to posixmodule.c and semaphore.c. * readline.c includes <sys/select.h> instead of <sys/time.h>. * resource.c no longer includes <time.h> and <sys/time.h>.
* gh-108765: Python.h no longer includes <ieeefp.h> (#108781)Victor Stinner2023-09-021-6/+0
| | | | Remove also the HAVE_IEEEFP_H macro: remove ieeefp.h from the AC_CHECK_HEADERS() check of configure.ac.
* gh-108765: Remove old prototypes from pyport.h (#108782)Victor Stinner2023-09-021-26/+0
| | | | | | | Move prototypes of gethostname(), _getpty() and struct termios from pyport.h to the C code using them: posixmodule.c, socketmodule.c and termios.c. Replace "#ifdef SOLARIS" with "#ifdef __sun".
* gh-108765: Move standard includes to Python.h (#108769)Victor Stinner2023-09-011-6/+5
| | | | | | | | | | | | * 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 Stinner2023-08-311-6/+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().
* Define _Py_NULL as nullptr on C23 and newer (#108244)Victor Stinner2023-08-221-3/+4
| | | | C23 standard added nullptr constant: https://en.wikipedia.org/wiki/C23_(C_standard_revision)
* gh-103509: PEP 697 -- Limited C API for Extending Opaque Types (GH-103511)Petr Viktorin2023-05-041-0/+11
| | | | Co-authored-by: Oleg Iarygin <oleg@arhadthedev.net> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
* gh-103323: Get the "Current" Thread State from a Thread-Local Variable ↵Eric Snow2023-04-241-0/+21
| | | | | | | | | | | (gh-103324) We replace _PyRuntime.tstate_current with a thread-local variable. As part of this change, we add a _Py_thread_local macro in pyport.h (only for the core runtime) to smooth out the compiler differences. The main motivation here is in support of a per-interpreter GIL, but this change also provides some performance improvement opportunities. Note that we do not provide a fallback to the thread-local, either falling back to the old tstate_current or to thread-specific storage (PyThread_tss_*()). If that proves problematic then we can circle back. I consider it unlikely, but will run the buildbots to double-check. Also note that this does not change any of the code related to the GILState API, where it uses a thread state stored in thread-specific storage. I suspect we can combine that with _Py_tss_tstate (from here). However, that can be addressed separately and is not urgent (nor critical). (While this change was mostly done independently, I did take some inspiration from earlier (~2020) work by @markshannon (main...markshannon:threadstate_in_tls) and @vstinner (#23976).)
* gh-84436: Implement Immortal Objects (gh-19474)Eddie Elizondo2023-04-221-1/+0
| | | | | | | | | 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-101101: Unstable C API tier (PEP 689) (GH-101102)Petr Viktorin2023-02-281-0/+9
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* gh-101196: Make isdir/isfile/exists faster on Windows (GH-101324)Michael Droettboom2023-02-081-0/+4
| | | Co-authored-by: Eryk Sun <eryksun@gmail.com>
* gh-98705: Fix AIX build by undefining `__bool__` in C (#98768)Ayappan Perumal2023-02-021-0/+6
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* gh-98724: Fix Py_CLEAR() macro side effects (#99100) (#100070)Victor Stinner2022-12-071-0/+9
| | | | | | | | | | | | | | 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.
* gh-94731: Revert to C-style casts for _Py_CAST (GH-94782)Petr Viktorin2022-07-141-51/+3
| | | Co-authored-by: da-woods <dw-git@d-woods.co.uk>
* gh-91321: Fix compatibility with C++ older than C++11 (#93784)Victor Stinner2022-06-141-2/+5
| | | | | Fix the compatibility of the Python C API with C++ older than C++11. _Py_NULL is only defined as nullptr on C++11 and newer.
* gh-93442: Make C++ version of _Py_CAST work with 0/NULL. (#93500)Neil Schemenauer2022-06-051-0/+14
| | | | | | | | | | | | Add C++ overloads for _Py_CAST_impl() to handle 0/NULL. This will allow C++ extensions that pass 0 or NULL to macros using _Py_CAST() to continue to compile. Without this, you get an error like: invalid ‘static_cast’ from type ‘int’ to type ‘_object*’ The modern way to use a NULL value in C++ is to use nullptr. However, we want to not break extensions that do things the old way. Co-authored-by: serge-sans-paille
* gh-92898: Enhance _testcppext test on cast to PyObject* (#93111)Victor Stinner2022-05-261-25/+23
| | | | * Add StrongRef class. * Rename and reformat functions of the _Py_CAST() implementation.
* gh-93202: Always use %zd printf formatter (#93201)Victor Stinner2022-05-251-25/+3
| | | | | | | | | | | | | | | | Python now always use the ``%zu`` and ``%zd`` printf formats to format a size_t or Py_ssize_t number. Building Python 3.12 requires a C11 compiler, so these printf formats are now always supported. * PyObject_Print() and _PyObject_Dump() now use the printf %zd format to display an object reference count. * Update PY_FORMAT_SIZE_T comment. * Remove outdated notes about the %zd format in PyBytes_FromFormat() and PyUnicode_FromFormat() documentations. * configure no longer checks for the %zd format and no longer defines PY_FORMAT_SIZE_T macro in pyconfig.h. * pymacconfig.h no longer undefines PY_FORMAT_SIZE_T: macOS 10.4 is no longer supported. Python 3.12 now requires macOS 10.6 (Snow Leopard) or newer.
* GH-92898: Make _Py_Cast C++ version compatible with cast operator (gh-92951)serge-sans-paille2022-05-211-2/+26
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* gh-91321: Add _Py_NULL macro (#92253)Victor Stinner2022-05-031-0/+8
| | | | | | | | 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 Stinner2022-05-031-10/+10
| | | Rename also _Py_static_cast() to _Py_STATIC_CAST().
* gh-92135: Fix _Py_reinterpret_cast() for const (#92138)Victor Stinner2022-05-021-5/+15
| | | | | | | | | | Fix C++ compiler warnings on cast macros, like _PyObject_CAST(), when casting a constant expression to a non constant type: use const_cast<> in C++. * In C++, Py_SAFE_DOWNCAST() now uses static_cast<> rather than reinterpret_cast<>. * Add tests to the _testcppext C++ extension. * test_cppext no longer captures stdout in verbose mode.
* gh-90822: Make `PY_SSIZE_T_MAX` and `PY_SSIZE_T_MIN` constant expression ↵Ganesh Kathiresan2022-05-021-5/+6
| | | | (GH-92071)
* gh-91320: Add _Py_reinterpret_cast() macro (#91959)Victor Stinner2022-04-271-3/+14
| | | | | | | | | | | | | | 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.
* bpo-43166: Disable ceval.c optimizations for Windows debug builds (GH-32023)neonene2022-03-231-11/+0
| | | Also increases the stack allocation when run with `python_d.exe` to account for the extra stack checks that are added.
* bpo-45412: Add _PY_SHORT_FLOAT_REPR macro (GH-31171)Victor Stinner2022-02-231-55/+0
| | | | | | | | | | Remove the HAVE_PY_SET_53BIT_PRECISION macro (moved to the internal C API). * Move HAVE_PY_SET_53BIT_PRECISION macro to pycore_pymath.h. * Replace PY_NO_SHORT_FLOAT_REPR macro with _PY_SHORT_FLOAT_REPR macro which is always defined. gcc -Wundef emits a warning when using _PY_SHORT_FLOAT_REPR but the macro is not defined, if pycore_pymath.h include was forgotten.
* bpo-45569: Change PYLONG_BITS_IN_DIGIT default to 30 (GH-30497)Mark Dickinson2022-01-141-12/+4
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* bpo-40280: Optimize ints and and startup on wasm (GH-29887)Christian Heimes2021-12-021-4/+8
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* bpo-45723: Prepare support for autoconf 2.71 (GH-29441)Christian Heimes2021-11-081-8/+1
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* bpo-45434: Only exclude <stdlib.h> in Python 3.11 limited C API (GH-29027)Victor Stinner2021-10-191-3/+4
| | | | | | | The Python 3.11 limited C API no longer includes stdlib.h, stdio.h, string.h and errno.h. * Exclude Py_MEMCPY() from Python 3.11 limited C API. * xxlimited C extension is now built with Python 3.11 limited C API.
* bpo-45434: pyport.h no longer includes <stdlib.h> (GH-28914)Victor Stinner2021-10-131-2/+0
| | | | | Include <stdlib.h> explicitly in C files. Python.h includes <wchar.h>.
* bpo-45434: Move _Py_BEGIN_SUPPRESS_IPH to pycore_fileutils.h (GH-28922)Victor Stinner2021-10-131-20/+0
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* bpo-45412: Move _Py_SET_53BIT_PRECISION_START to pycore_pymath.h (GH-28882)Victor Stinner2021-10-111-73/+12
| | | | | | | | | | | | | | | Move the following macros , to pycore_pymath.h (internal C API): * _Py_SET_53BIT_PRECISION_HEADER * _Py_SET_53BIT_PRECISION_START * _Py_SET_53BIT_PRECISION_END PEP 7: add braces to if and "do { ... } while (0)" in these macros. Move also _Py_get_387controlword() and _Py_set_387controlword() definitions to pycore_pymath.h. These functions are no longer exported. pystrtod.c now includes pycore_pymath.h.
* bpo-45434: Cleanup Python.h header file (GH-28883)Victor Stinner2021-10-111-0/+26
| | | | | | * Move limits.h include and UCHAR_MAX checks to pyport.h. * Move sanitizers macros to pyport.h. * Remove comment about <assert.h>: C extensions are built with NDEBUG automatically by Python.
* bpo-45412: Remove Py_SET_ERRNO_ON_MATH_ERROR() macro (GH-28820)Victor Stinner2021-10-111-63/+0
| | | | | | | | | | | | | | | | | | | | | | Remove the following math macros using the errno variable: * Py_ADJUST_ERANGE1() * Py_ADJUST_ERANGE2() * Py_OVERFLOWED() * Py_SET_ERANGE_IF_OVERFLOW() * Py_SET_ERRNO_ON_MATH_ERROR() Create pycore_pymath.h internal header file. Rename Py_ADJUST_ERANGE1() and Py_ADJUST_ERANGE2() to _Py_ADJUST_ERANGE1() and _Py_ADJUST_ERANGE2(), and convert these macros to static inline functions. Move the following macros to pycore_pymath.h: * _Py_IntegralTypeSigned() * _Py_IntegralTypeMax() * _Py_IntegralTypeMin() * _Py_InIntegralTypeRange()
* bpo-45116: Py_DEBUG ignores Py_ALWAYS_INLINE (GH-28419)Victor Stinner2021-09-171-1/+10
| | | | If the Py_DEBUG macro is defined, the Py_ALWAYS_INLINE macro does nothing.
* bpo-45116: Add the Py_ALWAYS_INLINE macro (GH-28390)Victor Stinner2021-09-171-0/+22
| | | | | Add the Py_ALWAYS_INLINE macro to ask the compiler to always inline a static inline function. The compiler can ignore it and decides to not inline the function.
* bpo-45094: Add Py_NO_INLINE macro (GH-28140)Victor Stinner2021-09-031-12/+13
| | | | | * Rename _Py_NO_INLINE macro to Py_NO_INLINE: make it public and document it. * Sort macros in the C API documentation.
* Do not use Py_ssize_clean_t (GH-25940)Inada Naoki2021-05-081-5/+1
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