svn+ssh://pythondev@svn.python.org/python/trunk
........
r67898 | benjamin.peterson | 2008-12-21 15:00:53 -0600 (Sun, 21 Dec 2008) | 1 line
compute DISTVERSION with patchlevel.py
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r67904 | benjamin.peterson | 2008-12-22 14:44:58 -0600 (Mon, 22 Dec 2008) | 1 line
less attitude
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r67905 | benjamin.peterson | 2008-12-22 14:51:15 -0600 (Mon, 22 Dec 2008) | 1 line
fix#4720: the format to PyArg_ParseTupleAndKeywords can now start with '|'
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r67906 | benjamin.peterson | 2008-12-22 14:52:53 -0600 (Mon, 22 Dec 2008) | 1 line
add NEWS note
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r67907 | benjamin.peterson | 2008-12-22 16:12:19 -0600 (Mon, 22 Dec 2008) | 1 line
silence compiler warning
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r67912 | georg.brandl | 2008-12-23 06:37:21 -0600 (Tue, 23 Dec 2008) | 2 lines
Fix missing "svn" command.
........
r67918 | georg.brandl | 2008-12-23 09:44:25 -0600 (Tue, 23 Dec 2008) | 2 lines
Markup fix.
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r67920 | benjamin.peterson | 2008-12-23 14:09:28 -0600 (Tue, 23 Dec 2008) | 1 line
use a global variable, so the compiler doesn't optimize the assignment out
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r67921 | benjamin.peterson | 2008-12-23 14:12:33 -0600 (Tue, 23 Dec 2008) | 1 line
make global static
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r67923 | benjamin.peterson | 2008-12-24 09:10:27 -0600 (Wed, 24 Dec 2008) | 1 line
#4736 BufferRWPair.closed shouldn't try to call another property as a function
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r67924 | benjamin.peterson | 2008-12-24 10:10:05 -0600 (Wed, 24 Dec 2008) | 1 line
pretend exceptions don't exist a while longer
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r67927 | benjamin.peterson | 2008-12-26 17:26:30 -0600 (Fri, 26 Dec 2008) | 1 line
python version is included in file name now
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r67930 | hirokazu.yamamoto | 2008-12-26 22:19:48 -0600 (Fri, 26 Dec 2008) | 2 lines
Issue #4740: Use HIGHEST_PROTOCOL in pickle test.
(There is no behavior difference in 2.x because HIGHEST_PROTOCOL == 2)
........
r67932 | alexandre.vassalotti | 2008-12-27 00:36:10 -0600 (Sat, 27 Dec 2008) | 5 lines
Remove unnecessary casts related to unicode_decode_call_errorhandler.
Make the _PyUnicode_Resize macro a static function.
These changes are needed to avoid breaking strict aliasing rules.
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r67943 | alexandre.vassalotti | 2008-12-27 04:02:59 -0600 (Sat, 27 Dec 2008) | 2 lines
Fix bogus unicode tests in pickletester.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67797 | amaury.forgeotdarc | 2008-12-15 22:47:57 +0100 (Mon, 15 Dec 2008) | 4 lines
#3954: Fix error handling code in _hotshot.logreader
Will port to 2.6. hotshot was deleted from python 3.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67750 | nick.coghlan | 2008-12-14 20:54:50 +1000 (Sun, 14 Dec 2008) | 1 line
Fix several issues relating to access to source code inside zipfiles. Initial work by Alexander Belopolsky. See Misc/NEWS in this checkin for details.
........
r67751 | nick.coghlan | 2008-12-14 21:09:40 +1000 (Sun, 14 Dec 2008) | 1 line
Add file that was missed from r67750
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67707 | mark.dickinson | 2008-12-11 19:28:08 +0000 (Thu, 11 Dec 2008) | 5 lines
Issues #3167, #3682: tests for math.log and math.log10 were failing on
Solaris and OpenBSD. Fix this by handling special values and domain
errors directly in mathmodule.c, passing only positive nonspecial floats
to the system log/log10.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67398 | benjamin.peterson | 2008-11-26 18:39:17 +0100 (Wed, 26 Nov 2008) | 1 line
fix typo in sqlite3 docs
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r67423 | jesse.noller | 2008-11-28 19:59:35 +0100 (Fri, 28 Nov 2008) | 2 lines
issue4238: bsd support for cpu_count
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r67424 | christian.heimes | 2008-11-28 20:33:33 +0100 (Fri, 28 Nov 2008) | 1 line
Retain copyright of processing examples. This was requested by a Debian maintainer during packaging of the multiprocessing package for 2.4/2.5
........
r67432 | benjamin.peterson | 2008-11-29 00:18:46 +0100 (Sat, 29 Nov 2008) | 1 line
SVN format 9 is the same it seems
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r67440 | jeremy.hylton | 2008-11-29 00:42:59 +0100 (Sat, 29 Nov 2008) | 4 lines
Move definition int sval into branch of ifdef where it is used.
Otherwise, you get a warning about an undefined variable.
........
r67441 | jeremy.hylton | 2008-11-29 01:09:16 +0100 (Sat, 29 Nov 2008) | 2 lines
Reflow long lines.
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r67444 | amaury.forgeotdarc | 2008-11-29 03:03:32 +0100 (Sat, 29 Nov 2008) | 2 lines
Fix a small typo in docstring
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r67445 | benjamin.peterson | 2008-11-30 04:07:33 +0100 (Sun, 30 Nov 2008) | 1 line
StringIO.close() stops you from using the buffer, too
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r67454 | benjamin.peterson | 2008-11-30 15:43:23 +0100 (Sun, 30 Nov 2008) | 1 line
note the version that works
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r67457 | christian.heimes | 2008-11-30 22:16:28 +0100 (Sun, 30 Nov 2008) | 1 line
w# requires Py_ssize_t
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r67463 | skip.montanaro | 2008-12-01 02:55:22 +0100 (Mon, 01 Dec 2008) | 1 line
typo in comment
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67365 | benjamin.peterson | 2008-11-23 22:09:03 -0600 (Sun, 23 Nov 2008) | 1 line
#4396 make the parser module correctly validate the with syntax
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svn+ssh://pythondev@svn.python.org/python/trunk
................
r66801 | andrew.kuchling | 2008-10-04 23:51:59 +0200 (Sat, 04 Oct 2008) | 1 line
Punctuation fix; expand dict.update docstring to be clearer
................
r66803 | benjamin.peterson | 2008-10-05 00:15:31 +0200 (Sun, 05 Oct 2008) | 1 line
fix typo
................
r66804 | andrew.kuchling | 2008-10-05 02:11:56 +0200 (Sun, 05 Oct 2008) | 1 line
#1415508 from Rocky Bernstein: add docstrings for enable_interspersed_args(), disable_interspersed_args()
................
r66813 | andrew.kuchling | 2008-10-06 14:07:04 +0200 (Mon, 06 Oct 2008) | 3 lines
Per Greg Ward, optparse is no longer being externally maintained.
I'll look at the bugs in the Optik bug tracker and copy them to the Python bug
tracker if they're still relevant.
................
r66854 | georg.brandl | 2008-10-08 19:20:20 +0200 (Wed, 08 Oct 2008) | 2 lines
#4059: patch up some sqlite docs.
................
r66855 | georg.brandl | 2008-10-08 19:30:55 +0200 (Wed, 08 Oct 2008) | 2 lines
#4058: fix some whatsnew markup.
................
r66856 | georg.brandl | 2008-10-08 20:47:17 +0200 (Wed, 08 Oct 2008) | 3 lines
#3935: properly support list subclasses in the C impl. of bisect.
Patch reviewed by Raymond.
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r66866 | benjamin.peterson | 2008-10-09 22:54:43 +0200 (Thu, 09 Oct 2008) | 1 line
update paragraph about __future__ for 2.6
................
r66870 | armin.rigo | 2008-10-10 10:40:44 +0200 (Fri, 10 Oct 2008) | 2 lines
Typo: "ThreadError" is the name in the C source.
................
r66871 | benjamin.peterson | 2008-10-10 22:38:49 +0200 (Fri, 10 Oct 2008) | 1 line
fix a small typo
................
r66872 | benjamin.peterson | 2008-10-10 22:51:37 +0200 (Fri, 10 Oct 2008) | 1 line
talk about how you can unzip with zip
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r66874 | benjamin.peterson | 2008-10-11 00:23:41 +0200 (Sat, 11 Oct 2008) | 1 line
PyGILState_Acquire -> PyGILState_Ensure
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r66887 | benjamin.peterson | 2008-10-13 23:51:40 +0200 (Mon, 13 Oct 2008) | 1 line
document how to disable fixers
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r66903 | benjamin.peterson | 2008-10-15 22:34:09 +0200 (Wed, 15 Oct 2008) | 1 line
don't recurse into directories that start with '.'
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r66905 | benjamin.peterson | 2008-10-15 23:05:55 +0200 (Wed, 15 Oct 2008) | 1 line
support the optional line argument for idle
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r66911 | benjamin.peterson | 2008-10-16 01:10:28 +0200 (Thu, 16 Oct 2008) | 41 lines
Merged revisions 66805,66841,66860,66884-66886,66893,66907,66910 via svnmerge from
svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3
........
r66805 | benjamin.peterson | 2008-10-04 20:11:02 -0500 (Sat, 04 Oct 2008) | 1 line
mention what the fixes directory is for
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r66841 | benjamin.peterson | 2008-10-07 17:48:12 -0500 (Tue, 07 Oct 2008) | 1 line
use assertFalse and assertTrue
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r66860 | benjamin.peterson | 2008-10-08 16:05:07 -0500 (Wed, 08 Oct 2008) | 1 line
instead of abusing the pattern matcher, use start_tree to find a next binding
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r66884 | benjamin.peterson | 2008-10-13 15:50:30 -0500 (Mon, 13 Oct 2008) | 1 line
don't print tokens to stdout when -v is given
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r66885 | benjamin.peterson | 2008-10-13 16:28:57 -0500 (Mon, 13 Oct 2008) | 1 line
add the -x option to disable fixers
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r66886 | benjamin.peterson | 2008-10-13 16:33:53 -0500 (Mon, 13 Oct 2008) | 1 line
cut down on some crud
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r66893 | benjamin.peterson | 2008-10-14 17:16:54 -0500 (Tue, 14 Oct 2008) | 1 line
add an optional set literal fixer
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r66907 | benjamin.peterson | 2008-10-15 16:59:41 -0500 (Wed, 15 Oct 2008) | 1 line
don't write backup files by default
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r66910 | benjamin.peterson | 2008-10-15 17:43:10 -0500 (Wed, 15 Oct 2008) | 1 line
add the -n option; it stops backupfiles from being written
........
................
r66913 | benjamin.peterson | 2008-10-16 20:52:14 +0200 (Thu, 16 Oct 2008) | 1 line
document that deque indexing is O(n) #4123
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r66927 | andrew.kuchling | 2008-10-16 22:15:47 +0200 (Thu, 16 Oct 2008) | 1 line
Fix wording (2.6.1 backport candidate)
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r66932 | benjamin.peterson | 2008-10-16 23:09:28 +0200 (Thu, 16 Oct 2008) | 1 line
check for error conditions in _json #3623
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r66938 | benjamin.peterson | 2008-10-16 23:27:54 +0200 (Thu, 16 Oct 2008) | 1 line
fix possible ref leak
................
r66942 | benjamin.peterson | 2008-10-16 23:48:06 +0200 (Thu, 16 Oct 2008) | 1 line
fix more possible ref leaks in _json and use Py_CLEAR
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r66962 | benjamin.peterson | 2008-10-17 22:01:01 +0200 (Fri, 17 Oct 2008) | 1 line
clarify CALL_FUNCTION #4141
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r66964 | georg.brandl | 2008-10-17 23:41:49 +0200 (Fri, 17 Oct 2008) | 2 lines
Fix duplicate word.
................
r66973 | armin.ronacher | 2008-10-19 10:27:43 +0200 (Sun, 19 Oct 2008) | 3 lines
Fixed#4067 by implementing _attributes and _fields for the AST root node.
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r66974 | benjamin.peterson | 2008-10-19 15:59:01 +0200 (Sun, 19 Oct 2008) | 1 line
fix compiler warning
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r66977 | benjamin.peterson | 2008-10-19 21:39:16 +0200 (Sun, 19 Oct 2008) | 1 line
mention -n
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r66992 | benjamin.peterson | 2008-10-21 22:51:13 +0200 (Tue, 21 Oct 2008) | 1 line
make sure to call iteritems()
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r66998 | benjamin.peterson | 2008-10-22 22:57:43 +0200 (Wed, 22 Oct 2008) | 1 line
fix a few typos
................
r66999 | benjamin.peterson | 2008-10-22 23:05:30 +0200 (Wed, 22 Oct 2008) | 1 line
and another typo...
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r67002 | hirokazu.yamamoto | 2008-10-23 02:37:33 +0200 (Thu, 23 Oct 2008) | 1 line
Issue #4183: Some tests didn't run with pickle.HIGHEST_PROTOCOL.
................
r67005 | walter.doerwald | 2008-10-23 15:11:39 +0200 (Thu, 23 Oct 2008) | 2 lines
Use the correct names of the stateless codec functions (Fixes issue 4178).
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r67007 | benjamin.peterson | 2008-10-23 23:43:48 +0200 (Thu, 23 Oct 2008) | 1 line
only nonempty __slots__ don't work
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r67028 | benjamin.peterson | 2008-10-26 01:27:07 +0200 (Sun, 26 Oct 2008) | 1 line
don't use a catch-all
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r67040 | armin.rigo | 2008-10-28 18:01:21 +0100 (Tue, 28 Oct 2008) | 5 lines
Fix one of the tests: it relied on being present in an "output test" in
order to actually test what it was supposed to test, i.e. that the code
in the __del__ method did not crash. Use instead the new helper
test_support.captured_output().
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r67041 | benjamin.peterson | 2008-10-29 21:33:00 +0100 (Wed, 29 Oct 2008) | 1 line
mention the version gettempdir() was added
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r67044 | amaury.forgeotdarc | 2008-10-30 00:15:57 +0100 (Thu, 30 Oct 2008) | 3 lines
Correct error message in io.open():
closefd=True is the only accepted value with a file name.
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r67070 | benjamin.peterson | 2008-10-31 21:41:44 +0100 (Fri, 31 Oct 2008) | 1 line
rephrase has_key doc
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r67089 | benjamin.peterson | 2008-11-03 21:43:20 +0100 (Mon, 03 Nov 2008) | 1 line
clarify by splitting into multiple paragraphs
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r67091 | benjamin.peterson | 2008-11-03 23:34:57 +0100 (Mon, 03 Nov 2008) | 1 line
move a FileIO test to test_fileio
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r67101 | georg.brandl | 2008-11-04 21:49:35 +0100 (Tue, 04 Nov 2008) | 2 lines
#4167: fix markup glitches.
................
r67117 | georg.brandl | 2008-11-06 11:17:58 +0100 (Thu, 06 Nov 2008) | 2 lines
#4268: Use correct module for two toplevel functions.
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r67118 | georg.brandl | 2008-11-06 11:19:11 +0100 (Thu, 06 Nov 2008) | 2 lines
#4267: small fixes in sqlite3 docs.
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r67119 | georg.brandl | 2008-11-06 11:20:49 +0100 (Thu, 06 Nov 2008) | 2 lines
#4245: move Thread section to the top.
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r67123 | georg.brandl | 2008-11-06 19:49:15 +0100 (Thu, 06 Nov 2008) | 2 lines
#4247: add "pass" examples to tutorial.
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r67124 | andrew.kuchling | 2008-11-06 20:23:02 +0100 (Thu, 06 Nov 2008) | 1 line
Fix grammar error; reword two paragraphs
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67066 | benjamin.peterson | 2008-10-30 21:16:05 -0500 (Thu, 30 Oct 2008) | 5 lines
make sure the parser flags and passed onto the compiler
This fixes "from __future__ import unicode_literals" in an exec statment
See #4225
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svn+ssh://pythondev@svn.python.org/python/trunk
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r66891 | amaury.forgeotdarc | 2008-10-14 23:47:22 +0200 (mar., 14 oct. 2008) | 5 lines
#4122: On Windows, Py_UNICODE_ISSPACE cannot be used in an extension module:
compilation fails with "undefined reference to _Py_ascii_whitespace"
Will backport to 2.6.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r66809 | hirokazu.yamamoto | 2008-10-06 10:57:03 +0900 | 1 line
Added the test for issue3762.
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r66810 | hirokazu.yamamoto | 2008-10-06 11:41:59 +0900 | 1 line
More strict test. Consider the case sys.executable itself is symlink.
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r66835 | hirokazu.yamamoto | 2008-10-08 03:10:47 +0900 | 1 line
more intensive test on dbm.
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r66862 | hirokazu.yamamoto | 2008-10-09 19:00:30 +0900 | 3 lines
On windows, os.chdir given unicode was not working if GetCurrentDirectoryW
returned a path longer than MAX_PATH. (But It's doubtful this code path is
really executed because I cannot move to such directory on win2k)
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r66863 | hirokazu.yamamoto | 2008-10-09 19:11:21 +0900 | 1 line
r66862 contained memory leak.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r66748 | christian.heimes | 2008-10-02 21:47:50 +0200 (Thu, 02 Oct 2008) | 1 line
Fixed a couple more C99 comments and one occurence of inline.
........
timer that did not return a float and a timer was still running when the
Profiler object was garbage collected.
Fixes issue 3895.
Code review by Benjamin Peterson.
PyString_FromFormat which has an independent implementation, and uses "%zd".
This makes a difference on win64, where printf needs "%Id" to display
64bit values. For example, queue.__repr__ was incorrect.
Reviewed by Martin von Loewis.
* crashes on memory allocation failure found with failmalloc
* memory leaks found with valgrind
* compiler warnings in opt mode which would lead to invalid memory reads
* problem using wrong name in decimal module reported by pychecker
Update the valgrind suppressions file with new leaks that are small/one-time
leaks we don't care about (ie, they are too hard to fix).
TBR=barry
TESTED=./python -E -tt ./Lib/test/regrtest.py -uall (both debug and opt modes)
in opt mode:
valgrind -q --leak-check=yes --suppressions=Misc/valgrind-python.supp \
./python -E -tt ./Lib/test/regrtest.py -uall,-bsddb,-compiler \
-x test_logging test_ssl test_multiprocessing
valgrind -q --leak-check=yes --suppressions=Misc/valgrind-python.supp \
./python -E -tt ./Lib/test/regrtest.py test_multiprocessing
for i in `seq 1 4000` ; do
LD_PRELOAD=~/local/lib/libfailmalloc.so FAILMALLOC_INTERVAL=$i \
./python -c pass
done
At least some of these fixes should probably be backported to 2.5.
This is a verifier for the binary code used by the _sre module (this
is often called bytecode, though to distinguish it from Python bytecode
I put it in quotes).
I wrote this for Google App Engine, and am making the patch available as
open source under the Apache 2 license. Below are the copyright
statement and license, for completeness.
# Copyright 2008 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
It's not necessary to include these copyrights and bytecode in the
source file. Google has signed a contributor's agreement with the PSF
already.
This patch publishes the work done until now
for Python 3.0 compatibility. Still a lot
to be done.
When possible, we use 3.0 features in Python 2.6,
easing development and testing, and exposing internal
changes to a wider audience, for better test coverage.
Some mode details:
http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.2
was not always being done properly in some python types and extension
modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have
all been updated to perform better checks and places in the code that
would previously leak memory on the error path when such an allocation
failed have been fixed.
process rather than both parent and child.
Does anyone actually use fork1()? It appears to be a Solaris thing
but if Python is built with pthreads on Solaris, fork1() and fork()
should be the same.
When a thread touches such an object for the first time, a new thread-local __dict__ is created,
and the __init__ method is run.
But a thread switch can occur here; if the other thread touches the same object, it installs another
__dict__; when the first thread resumes, it updates the dictionary of the second...
This is the deep cause of the failures in test_multiprocessing involving "managers" objects.
Also a 2.5 backport candidate.
behaviours. I left the original test commented out (note
that that test came from #2702, which seems to have a
problem in FreeBSD and Windows, but not in Linux).
I included a new test, to watch over the now-broken
behaviour, I took it from #3179.
Some functions in the msvcrt module are skipped,
and socket.ioctl is enabled only when using a more recent Platform SDK.
(and yes, there are still companies that use a 10-years old compiler)
Added checks for integer overflows, contributed by Google. Some are
only available if asserts are left in the code, in cases where they
can't be triggered from Python code.
occurances of PyBytes_ in the code to their original PyString_ names. The
bytesobject.c file will be renamed back to stringobject.c in a future checkin.
ctypes maintains thread-local storage that has space for two error
numbers: private copies of the system 'errno' value and, on Windows,
the system error code accessed by the GetLastError() and
SetLastError() api functions.
Foreign functions created with CDLL(..., use_errno=True), when called,
swap the system 'errno' value with the private copy just before the
actual function call, and swapped again immediately afterwards. The
'use_errno' parameter defaults to False, in this case 'ctypes_errno'
is not touched.
On Windows, foreign functions created with CDLL(...,
use_last_error=True) or WinDLL(..., use_last_error=True) swap the
system LastError value with the ctypes private copy.
The values are also swapped immeditately before and after ctypes
callback functions are called, if the callbacks are constructed using
the new optional use_errno parameter set to True: CFUNCTYPE(...,
use_errno=TRUE) or WINFUNCTYPE(..., use_errno=True).
New ctypes functions are provided to access the ctypes private copies
from Python:
- ctypes.set_errno(value) and ctypes.set_last_error(value) store
'value' in the private copy and returns the previous value.
- ctypes.get_errno() and ctypes.get_last_error() returns the current
ctypes private copies value.
This patch adds a new configure argument on OSX:
--with-universal-archs=[32-bit|64-bit|all]
When used with the --enable-universalsdk option this controls which
CPU architectures are includes in the framework. The default is 32-bit,
meaning i386 and ppc. The most useful alternative is 'all', which includes
all 4 CPU architectures supported by MacOS X (i386, ppc, x86_64 and ppc64).
This includes limited support for the Carbon bindings in 64-bit mode as well,
limited because (a) I haven't done extensive testing and (b) a large portion
of the Carbon API's aren't available in 64-bit mode anyway.
I've also duplicated a feature of Apple's build of python: setting the
environment variable 'ARCHFLAGS' controls the '-arch' flags used for building
extensions using distutils.
convention that allows safe access to errno)
This code does not yet work on OS X (__thread storage specifier not
available), so i needs a configure check plus a more portable
solution.
errno (and LastError, on Windows).
ctypes maintains a module-global, but thread-local, variable that
contains an error number; called 'ctypes_errno' for this discussion.
This variable is a private copy of the systems 'errno' value; the copy
is swapped with the 'errno' variable on several occasions.
Foreign functions created with CDLL(..., use_errno=True), when called,
swap the values just before the actual function call, and swapped
again immediately afterwards. The 'use_errno' parameter defaults to
False, in this case 'ctypes_errno' is not touched.
The values are also swapped immeditately before and after ctypes
callback functions are called, if the callbacks are constructed using
the new optional use_errno parameter set to True: CFUNCTYPE(..., use_errno=TRUE)
or WINFUNCTYPE(..., use_errno=True).
Two new ctypes functions are provided to access the 'ctypes_errno'
value from Python:
- ctypes.set_errno(value) sets ctypes_errno to 'value', the previous
ctypes_errno value is returned.
- ctypes.get_errno() returns the current ctypes_errno value.
---
On Windows, the same scheme is implemented for the error value which
is managed by the GetLastError() and SetLastError() windows api calls.
The ctypes functions are 'ctypes.set_last_error(value)' and
'ctypes.get_last_error()', the CDLL and WinDLL optional parameter is
named 'use_last_error', defaults to False.
---
On Windows, TlsSetValue and TlsGetValue calls are used to provide
thread local storage for the variables; ctypes compiled with __GNUC__
uses __thread variables.
* Expand comments.
* Swap variable names in the sum_exact code so that x and y
are consistently chosen as the larger and smaller magnitude
values respectively.
Renamed copy_reg to copyreg in the standard library, to avoid
spurious warnings and ease later merging to py3k branch. Public
documentation remains intact.