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.
* 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().
Fix potential race condition in code patterns:
* Replace "Py_DECREF(var); var = new;" with "Py_SETREF(var, new);"
* Replace "Py_XDECREF(var); var = new;" with "Py_XSETREF(var, new);"
* Replace "Py_CLEAR(var); var = new;" with "Py_XSETREF(var, new);"
Other changes:
* Replace "old = var; var = new; Py_DECREF(var)"
with "Py_SETREF(var, new);"
* Replace "old = var; var = new; Py_XDECREF(var)"
with "Py_XSETREF(var, new);"
* And remove the "old" variable.
Python 3.11 now uses C11 standard which adds static_assert()
to <assert.h>.
* In pytime.c, replace Py_BUILD_ASSERT() with preprocessor checks on
SIZEOF_TIME_T with #error.
* On macOS, py_mach_timebase_info() now accepts timebase members with
the same size than _PyTime_t.
* py_get_monotonic_clock() now saturates GetTickCount64() to
_PyTime_MAX: GetTickCount64() is unsigned, whereas _PyTime_t is
signed.
Pass the current interpreter (interp) rather than the current Python
thread state (tstate) to internal functions which only use the
interpreter.
Modified functions:
* _PyXXX_Fini() and _PyXXX_ClearFreeList() functions
* _PyEval_SignalAsyncExc(), make_pending_calls()
* _PySys_GetObject(), sys_set_object(), sys_set_object_id(), sys_set_object_str()
* should_audit(), set_flags_from_config(), make_flags()
* _PyAtExit_Call()
* init_stdio_encoding()
* etc.
Add _PyIndex_Check() function to the internal C API: fast inlined
verson of PyIndex_Check().
Add Include/internal/pycore_abstract.h header file.
Replace PyIndex_Check() with _PyIndex_Check() in C files of Objects
and Python subdirectories.
Fix a crash in slice_richcompare(): use strong references rather than
stolen references for the two temporary internal tuples.
The crash (or assertion error) occurred if a garbage collection
occurred during slice_richcompare(), especially while calling
PyObject_RichCompare(t1, t2, op).
METH_NOARGS functions need only a single argument but they are cast
into a PyCFunction, which takes two arguments. This triggers an
invalid function cast warning in gcc8 due to the argument mismatch.
Fix this by adding a dummy unused argument.
* group the (stateful) runtime globals into various topical structs
* consolidate the topical structs under a single top-level _PyRuntimeState struct
* add a check-c-globals.py script that helps identify runtime globals
Other globals are excluded (see globals.txt and check-c-globals.py).
Error messages when pass keyword arguments to some builtins that
don't support keyword arguments contained double parenthesis: "()()".
The regression was introduced by bpo-30534.
a macro if Py_LIMITED_API is not set or set to the value between 0x03050400
and 0x03060000 (not including) or 0x03060100 or higher. Added functions
PySlice_Unpack() and PySlice_AdjustIndices().
This commit rewrites the docstring for int() to incorporate the documentation
changes made in issue #16036. It also switches the docstrings for int(),
str(), range(), and slice() to use multi-line signatures.
svn+ssh://pythondev@svn.python.org/python/trunk
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r64365 | raymond.hettinger | 2008-06-17 19:56:57 -0500 (Tue, 17 Jun 2008) | 1 line
Fix double decref.
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r64370 | mark.dickinson | 2008-06-18 04:20:17 -0500 (Wed, 18 Jun 2008) | 2 lines
Typo fix
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r64406 | andrew.kuchling | 2008-06-19 09:02:30 -0500 (Thu, 19 Jun 2008) | 1 line
Only include update_lines_cols() function when it's actually going to be used
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r64408 | amaury.forgeotdarc | 2008-06-19 14:57:39 -0500 (Thu, 19 Jun 2008) | 2 lines
test_macos can be skipped on non-mac platforms.
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r64409 | andrew.kuchling | 2008-06-19 15:33:31 -0500 (Thu, 19 Jun 2008) | 1 line
Put threading in front of thread
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r64412 | amaury.forgeotdarc | 2008-06-19 16:17:12 -0500 (Thu, 19 Jun 2008) | 3 lines
In test_site, correctly escape backslashes in path names.
This allows the test to pass when the username begins with a lowercase 't'...
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r64416 | vinay.sajip | 2008-06-19 17:40:17 -0500 (Thu, 19 Jun 2008) | 2 lines
Bug #3136: fileConfig()'s disabling of old loggers is now conditional via an optional disable_existing_loggers parameter, but the default value is such that the old behaviour is preserved.
Thanks to Leandro Lucarella for the patch.
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r64417 | vinay.sajip | 2008-06-19 17:41:08 -0500 (Thu, 19 Jun 2008) | 1 line
Updated with fix for #3136.
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r64420 | andrew.kuchling | 2008-06-19 21:05:57 -0500 (Thu, 19 Jun 2008) | 1 line
Various items
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r64421 | andrew.kuchling | 2008-06-19 21:11:42 -0500 (Thu, 19 Jun 2008) | 1 line
Fix comment typos
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r64425 | andrew.kuchling | 2008-06-20 06:39:54 -0500 (Fri, 20 Jun 2008) | 1 line
Various items
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r64426 | mark.dickinson | 2008-06-20 09:53:43 -0500 (Fri, 20 Jun 2008) | 4 lines
Issue #3004: Minor fix to slice.indices(). slice(-10).indices(9) now
returns (0, 0, 1) instead of (0, -1, 1), and slice(None, 10, -1).indices(10)
returns (9, 9, -1) instead of (9, 10, -1).
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r64427 | mark.dickinson | 2008-06-20 10:17:41 -0500 (Fri, 20 Jun 2008) | 2 lines
Fix outdated count of the number of new math module functions.
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r64428 | mark.dickinson | 2008-06-20 10:26:19 -0500 (Fri, 20 Jun 2008) | 2 lines
Fix another typo in math_sum comment
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Eddie Elizondo
Mark Shannon
Furkan Onder
Victor Stinner
Victor Stinner
Jeroen Demeyer
Siddhesh Poyarekar
Eric Snow
Serhiy Storchaka
Xiang Zhang
Benjamin Peterson
Alexandre Vassalotti
Mark Dickinson
Chris Jerdonek
Antoine Pitrou
Brian Curtin
Martin v. Löwis
Mark Dickinson
Christian Heimes