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* s/referrents/referents/g. Gotta love that referrers remains rife with rs.Tim Peters2003-04-081-8/+8
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* Finished implementing gc.get_referrents(): dealt with error and endTim Peters2003-04-081-6/+15
| | | | cases, wrote docs, added a test.
* Comment repair; no semantic changes.Tim Peters2003-04-071-4/+5
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* Reworked has_finalizer() to use the new _PyObject_Lookup() insteadTim Peters2003-04-071-73/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of PyObject_HasAttr(); the former promises never to execute arbitrary Python code. Undid many of the changes recently made to worm around the worst consequences of that PyObject_HasAttr() could execute arbitrary Python code. Compatibility is hard to discuss, because the dangerous cases are so perverse, and much of this appears to rely on implementation accidents. To start with, using hasattr() to check for __del__ wasn't only dangerous, in some cases it was wrong: if an instance of an old- style class didn't have "__del__" in its instance dict or in any base class dict, but a getattr hook said __del__ existed, then hasattr() said "yes, this object has a __del__". But instance_dealloc() ignores the possibility of getattr hooks when looking for a __del__, so while object.__del__ succeeds, no __del__ method is called when the object is deleted. gc was therefore incorrect in believing that the object had a finalizer. The new method doesn't suffer that problem (like instance_dealloc(), _PyObject_Lookup() doesn't believe __del__ exists in that case), but does suffer a somewhat opposite-- and even more obscure --oddity: if an instance of an old-style class doesn't have "__del__" in its instance dict, and a base class does have "__del__" in its dict, and the first base class with a "__del__" associates it with a descriptor (an object with a __get__ method), *and* if that descriptor raises an exception when __get__ is called, then (a) the current method believes the instance does have a __del__, but (b) hasattr() does not believe the instance has a __del__. While these disagree, I believe the new method is "more correct": because the descriptor *will* be called when the object is destructed, it can execute arbitrary Python code at the time the object is destructed, and that's really what gc means by "has a finalizer": not specifically a __del__ method, but more generally the possibility of executing arbitrary Python code at object destruction time. Code in a descriptor's __get__() executed at destruction time can be just as problematic as code in a __del__() executed then. So I believe the new method is better on all counts. Bugfix candidate, but it's unclear to me how all this differs in the 2.2 branch (e.g., new-style and old-style classes already took different gc paths in 2.3 before this last round of patches, but don't in the 2.2 branch).
* initgc(): Rewrote to use the PyModule_AddXYZ API; cuts code size.Tim Peters2003-04-061-17/+14
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* handle_finalizers(): Rewrote to call append_objects() and gc_list_merge()Tim Peters2003-04-061-36/+31
| | | | | | | | | instead of looping. Smaller and clearer. Faster, too, when we're not appending to gc.garbage: gc_list_merge() takes constant time, regardless of the lists' sizes. append_objects(): Moved up to live with the other list manipulation utilities.
* Switched from METH_VARARGS to METH_NOARGS for the 7 module functions thatTim Peters2003-04-061-44/+17
| | | | take no arguments; cuts generated code size.
* Reworked move_finalizer_reachable() to create two distinct lists:Tim Peters2003-04-061-31/+57
| | | | | | | | | externally unreachable objects with finalizers, and externally unreachable objects without finalizers reachable from such objects. This allows us to call has_finalizer() at most once per object, and so limit the pain of nasty getattr hooks. This fixes the failing "boom 2" example Jeremy posted (a non-printing variant of which is now part of test_gc), via never triggering the nasty part of its __getattr__ method.
* move_finalizers(): Rewrote. It's not necessary for this routineTim Peters2003-04-051-29/+20
| | | | | | | | | | | | | | to special-case classic classes, or to worry about refcounts; has_finalizer() deleted the current object iff the first entry in the unreachable list has changed. I don't believe it was correct to check for ob_refcnt == 1, either: the dealloc routine would get called by Py_DECREF then, but there's nothing to stop the dealloc routine from ressurecting the object, and then gc would remain at the head of the unreachable list despite that its refcount temporarily fell to 0 (and that would lead to an infinite loop in move_finalizers()). I'm still worried about has_finalizer() resurrecting other objects in the unreachable list: what's to stop them from getting collected?
* New comments. Rewrote has_finalizer() as a sequence of ifs instead ofTim Peters2003-04-051-6/+21
| | | | | | squashed-together conditional operators; makes it much easier to step thru in the debugger, and to set a breakpoint on the only dangerous path.
* Fixed new seemingly random segfaults, by moving the initialization ofTim Peters2003-04-051-8/+11
| | | | | | | | | | delstr from initgc() into collect(). initgc() isn't called unless the user explicitly imports gc, so can be used only for initialization of user-visible module features; delstr needs to be initialized for proper internal operation, whether or not gc is explicitly imported. Bugfix candidate? I don't know whether the new bug was backported to 2.2 already.
* Fix Tim's boom example.Jeremy Hylton2003-04-041-20/+54
| | | | | move_finalizers() moves every object from unreachable to collectable or finalizers, unless the object is deallocated first.
* Use fcntl() to put the audio device *back* into blocking mode afterGreg Ward2003-04-041-0/+9
| | | | | opening it in non-blocking mode. Both Guido and David Hammerton have reported that this fixes their problems with ossaudiodev -- hooray!
* Add get_referrents() helper function.Jeremy Hylton2003-04-031-1/+1
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* Add get_referrents() helper function.Jeremy Hylton2003-04-031-1/+32
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* Revert Patch #670715: iconv support.Martin v. Löwis2003-04-032-727/+0
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* init_bsddb(): Added a few symbols that Greg forgot.Barry Warsaw2003-03-311-1/+4
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* SF patch #667548, Add some audio constants by Michael PruettNeal Norwitz2003-03-301-3/+25
| | | | Also remove a few unused variables. Built on IRIX 6.5.
* Get build working with pre-C99 compilersNeal Norwitz2003-03-301-1/+1
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* Patch #650412: Check whether the address of flock and getpagesizeMartin v. Löwis2003-03-301-1/+13
| | | | can be taken, and use _SC_PAGE_SIZE if getpagesize is not available.
* Patch #672053: Return a result from Py_Main, instead of exiting.Martin v. Löwis2003-03-301-9/+9
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* Patch #695250: Suppress COPYRIGHT if site.py is not read. Fixes #672614.Martin v. Löwis2003-03-301-3/+6
| | | | Will backport to 2.2.
* Wrap thread stuff in WITH_THREAD. Fixes #704641.Martin v. Löwis2003-03-301-3/+23
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* Fake bool API for Python 2.2.Martin v. Löwis2003-03-301-0/+5
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* Rename LONG_LONG to PY_LONG_LONG. Fixes #710285.Martin v. Löwis2003-03-297-42/+42
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* 4.1.5Gregory P. Smith2003-03-271-1/+1
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* Adds support for the DBEnv->set_timeout() method.Gregory P. Smith2003-03-271-0/+26
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* add comment about 2.2 compatibilitySkip Montanaro2003-03-231-1/+13
| | | | dump empty TODO comment
* Make private function and data static.Neal Norwitz2003-03-231-2/+3
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* Get rid of warning on IRIXNeal Norwitz2003-03-211-1/+2
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* Add support for os.openpty() on AIX which uses /dev/ptc instead of /dev/ptmx.Neal Norwitz2003-03-211-3/+11
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* Squash compiler wng about signed-vs-unsigned mismatch.Tim Peters2003-03-211-1/+1
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* add _csv build lineSkip Montanaro2003-03-201-0/+3
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* new CSV file processing module - see PEP 305Skip Montanaro2003-03-201-0/+1465
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* New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is aTim Peters2003-03-202-446/+27
| | | | | refactoring to get all the duplicates of this delicate code out of the cPickle and struct modules.
* SF bug 705836: struct.pack of floats in non-native endian orderTim Peters2003-03-202-18/+61
| | | | | | | | | | | | | | pack_float, pack_double, save_float: All the routines for creating IEEE-format packed representations of floats and doubles simply ignored that rounding can (in rare cases) propagate out of a long string of 1 bits. At worst, the end-off carry can (by mistake) interfere with the exponent value, and then unpacking yields a result wrong by a factor of 2. In less severe cases, it can end up losing more low-order bits than intended, or fail to catch overflow *caused* by rounding. Bugfix candidate, but I already backported this to 2.2. In 2.3, this code remains in severe need of refactoring.
* Renamed PyObject_GenericGetIter to PyObject_SelfIterRaymond Hettinger2003-03-174-15/+15
| | | | | | to more accurately describe what the function does. Suggested by Thomas Wouters.
* Added a define EXTRAMACHDEPPATH which can be used to add sys.path itemsJack Jansen2003-03-171-1/+2
| | | | | | | | for specific platforms. Use this to add plat-mac and plat-mac/lib-scriptpackages on MacOSX. Also tested for not having adverse effects on Linux, and I think this code isn't used on Windows anyway. Fixes #661521.
* binascii_a2b_base64: Properly return an empty string if the input was allThomas Wouters2003-03-171-1/+8
| | | | | | | invalid, rather than returning a string of random garbage of the estimated result length. Closes SF patch #703471 by Hye-Shik Chang. Will backport to 2.2-maint (consider it done.)
* Created PyObject_GenericGetIter().Raymond Hettinger2003-03-173-24/+3
| | | | Factors out the common case of returning self.
* Created PyObject_GenericGetIter().Raymond Hettinger2003-03-171-96/+12
| | | | Factors out the common case of returning self.
* - New function time.tzset() provides access to the C library tzet()Guido van Rossum2003-03-141-74/+144
| | | | function, if supported. (SF patch #675422, by Stuart Bishop.)
* Take out my (long since disabled) POSIX signal mask handling code.Michael W. Hudson2003-03-131-171/+0
| | | | | I'm not going to have the time or energy to get this working x-platform -- anyone who does is welcome to the code!
* Open with O_NONBLOCK to avoid hanging on open().Greg Ward2003-03-111-1/+5
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* <sys/soundcard.h> seems to exist on both Linux and FreeBSD, so includeGreg Ward2003-03-101-22/+10
| | | | | | | | | it instead of the OS-specific <linux/soundcard.h> or <machine/soundcard.h>. Mixers devices have an ioctl-only interface, no read/write -- so the flags passed to open() don't really matter. Thus, drop the 'mode' parameter to openmixer() (ie. second arg to newossmixerobject()) and always open mixers with O_RDWR.
* An #endif was missing in Just's patch. Added.Jack Jansen2003-03-051-0/+1
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* removing one Mac hack and add another:Just van Rossum2003-03-051-26/+16
| | | | | | | - The applet logic has been replaced to bundlebuilder's bootstrap script - Due to Apple being extremely string about argv[0], we need a way to specify the actual executable name for use with sys.executable. See the comment embedded in the code.
* Always initialize Py_FileSystemDefaultEncoding on Unix in Py_Initialize,Martin v. Löwis2003-03-051-20/+0
| | | | | and not as a side effect of setlocale. Expose it as sys.getfilesystemencoding. Adjust test case.
* Patch #696645: Remove VMS code with uncertain authorship.Martin v. Löwis2003-03-053-301/+60
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* os.listdir(): Fall back to the original byte string if conversion to unicodeJust van Rossum2003-03-041-6/+8
| | | | fails, as discussed in patch #683592.
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