Commit Graph

28 Commits

Author SHA1 Message Date
Victor Stinner 6a43cce32b
gh-107249: Implement Py_UNUSED() for MSVC (#107250)
Fix warnings C4100 in Py_UNUSED() when Python is built with "cl /W4".

Example with this function included by Python.h:

    static inline unsigned int
    PyUnicode_IS_READY(PyObject* Py_UNUSED(op))
    { return 1; }

Without this change, building a C program with "cl /W4" which just
includes Python.h emits the warning:

    Include\cpython/unicodeobject.h(199):
    warning C4100: '_unused_op': unreferenced formal parameter

This change fix this warning.
2023-07-25 19:28:16 +02:00
Joshua Root 96e1901a59
gh-99069: Consolidate checks for static_assert (#94766)
Several platforms don't define the static_assert macro despite having
compiler support for the _Static_assert keyword. The macro needs to be
defined since it is used unconditionally in the Python code. So it
should always be safe to define it if undefined and not in C++11 (or
later) mode.

Hence, remove the checks for particular platforms or libc versions,
and just define static_assert anytime it needs to be defined but isn't.
That way, all platforms that need the fix will get it, regardless of
whether someone specifically thought of them.

Also document that certain macOS versions are among the platforms that
need this.

The C2x draft (currently expected to become C23) makes static_assert
a keyword to match C++. So only define the macro for up to C17.

Co-authored-by: Victor Stinner <vstinner@python.org>
2023-04-05 17:09:19 +02:00
Pablo Galindo Salgado 65ff27c7d3
gh-91731: Don't define 'static_assert' in C++11 where is a keyword to avoid UB (GH-93700) 2022-06-13 15:49:08 +01:00
Victor Stinner 22b75d9bef
gh-82616: Add Py_IS_TYPE_SIGNED() macro (#93178)
_posixsubprocess: add a static assertion to ensure that the pid_t
type is signed.

Replace _Py_IntegralTypeSigned() with _Py_IS_TYPE_SIGNED().
2022-05-27 15:05:35 +02:00
Pablo Galindo Salgado 4e6da502f4
gh-91731: Fix typo in pymacro.h (#92618)
* Fix typo in pymacro.h

* Update Include/pymacro.h

Co-authored-by: Victor Stinner <vstinner@python.org>

Co-authored-by: Victor Stinner <vstinner@python.org>
2022-05-10 13:47:22 +01:00
Pablo Galindo Salgado f0614ca980
gh-91731: Add macro compatibility for static_assert for old libcs (GH-92559) 2022-05-09 18:38:38 +01:00
Victor Stinner 1b184c8408
gh-91782: Define static_assert() macro on FreeBSD (#91787)
On FreeBSD, if the static_assert() macro is not defined, define it in
Python until <sys/cdefs.h> supports C11:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255290
2022-04-21 16:40:34 +02:00
Victor Stinner c19c3a0961
bpo-45476: Add _Py_RVALUE() macro (GH-29860)
Add a new _Py_RVALUE() macro to prevent using an expression as an
l-value.

Replace a "(void)" cast with the _Py_RVALUE() macro in the following
macros:

* PyCell_SET()
* PyList_SET_ITEM()
* PyTuple_SET_ITEM()
* _PyGCHead_SET_FINALIZED()
* _PyGCHead_SET_NEXT()
* asdl_seq_SET()
* asdl_seq_SET_UNTYPED()

Add also parentheses around macro arguments in PyCell_SET() and
PyTuple_SET_ITEM() macros.
2021-11-30 12:14:45 +01:00
Dong-hee Na 24ba3b0df5
bpo-41875: Use __builtin_unreachable when possible (GH-22433) 2020-09-29 05:41:23 +09:00
Serhiy Storchaka eebaa9bfc5
bpo-38249: Expand Py_UNREACHABLE() to __builtin_unreachable() in the release mode. (GH-16329)
Co-authored-by: Victor Stinner <vstinner@python.org>
2020-03-09 20:49:52 +02:00
Victor Stinner b1542583be
bpo-38205: Py_UNREACHABLE() calls Py_FatalError() (GH-16290) 2019-09-20 23:10:16 +02:00
Zachary Ware 3ab61473ba Enhance Py_UNREACHABLE macro (GH-16032) 2019-09-12 13:35:48 +01:00
Victor Stinner b3a9843cd1
Support Py_UNUSED() on clang (GH-13544) 2019-05-24 15:16:08 +02:00
Inada Naoki 926b0cb5f6
bpo-36641: Add "const" to PyDoc_VAR macro (GH-12854)
It reduces "data" segment in python about 200KB.
2019-04-17 08:39:46 +09:00
Barry Warsaw b2e5794870 bpo-31338 (#3374)
* Add Py_UNREACHABLE() as an alias to abort().
* Use Py_UNREACHABLE() instead of assert(0)
* Convert more unreachable code to use Py_UNREACHABLE()
* Document Py_UNREACHABLE() and a few other macros.
2017-09-14 18:13:16 -07:00
Niklas Fiekas 83371f4f7f bpo-29936: fix typo __GNU*C*_MINOR__ (#878) 2017-03-28 21:58:01 -07:00
Victor Stinner 98ee9d5b73 Add Py_MEMBER_SIZE macro
Issue #27350: use Py_MEMBER_SIZE() macro to get the size of
PyDictKeyEntry.dk_indices, rather than hardcoding 8.
2016-09-08 09:33:56 -07:00
Benjamin Peterson ca47063998 replace Py_(u)intptr_t with the c99 standard types 2016-09-06 13:47:26 -07:00
Serhiy Storchaka fad85aadb0 Issue #25558: Use compile-time asserts. 2015-11-07 15:42:38 +02:00
Victor Stinner 45e8e2f218 Issue #21490: Add new C macros: Py_ABS() and Py_STRINGIFY()
Keep _Py_STRINGIZE() in PC/pyconfig.h to not introduce a dependency between
pyconfig.h and pymacros.h.
2014-05-14 17:24:35 +02:00
Larry Hastings 3cceb38486 Issue #19976: Argument Clinic METH_NOARGS functions now always
take two parameters.
2014-01-04 11:09:09 -08:00
Christian Heimes e0a2d12ee5 Fix test for GCC 3.1+ but not strict ANSI C 2013-06-24 15:39:41 +02:00
Christian Heimes 61dbb00869 Issue #16881: Fix Py_ARRAY_LENGTH macro for GCC < 3.1. 2013-01-06 16:41:56 +01:00
Christian Heimes fd0ddab97b GCC doesn't support typeof in strict ansi mode (e.g. -ansi or -std=c89) 2012-09-23 16:15:01 +02:00
Antoine Pitrou ca8aa4acf6 Issue #15144: Fix possible integer overflow when handling pointers as integer values, by using Py_uintptr_t instead of size_t.
Patch by Serhiy Storchaka.
2012-09-20 20:56:47 +02:00
Victor Stinner f0ddadcf2e Rename Py_BUILD_ASSERT to Py_BUILD_ASSERT_EXPR
To make it clearer that Py_BUILD_ASSERT_EXPR(cond) cannot be used as
assert(cond).
2011-09-29 12:43:18 +02:00
Victor Stinner 573696a9ca pymacro.h: Inline _Py_ARRAY_LENGTH_CHECK() and add http://ccodearchive.net/ 2011-09-29 12:12:39 +02:00
Victor Stinner dfb866d127 Enhance Py_ARRAY_LENGTH(): fail at build time if the argument is not an array
Move other various macros to pymcacro.h

Thanks Rusty Russell for having written these amazing C macros!
2011-09-29 01:12:24 +02:00