cpython/Include/object.h

810 lines
29 KiB
C
Raw Normal View History

#ifndef Py_OBJECT_H
#define Py_OBJECT_H
#ifdef __cplusplus
extern "C" {
#endif
1991-02-19 08:39:46 -04:00
1990-10-14 09:07:46 -03:00
/* Object and type object interface */
/*
Objects are structures allocated on the heap. Special rules apply to
the use of objects to ensure they are properly garbage-collected.
Objects are never allocated statically or on the stack; they must be
accessed through special macros and functions only. (Type objects are
exceptions to the first rule; the standard types are represented by
statically initialized type objects, although work on type/class unification
for Python 2.2 made it possible to have heap-allocated type objects too).
1990-10-14 09:07:46 -03:00
An object has a 'reference count' that is increased or decreased when a
pointer to the object is copied or deleted; when the reference count
reaches zero there are no references to the object left and it can be
removed from the heap.
An object has a 'type' that determines what it represents and what kind
of data it contains. An object's type is fixed when it is created.
Types themselves are represented as objects; an object contains a
pointer to the corresponding type object. The type itself has a type
pointer pointing to the object representing the type 'type', which
contains a pointer to itself!).
Objects do not float around in memory; once allocated an object keeps
the same size and address. Objects that must hold variable-size data
can contain pointers to variable-size parts of the object. Not all
objects of the same type have the same size; but the size cannot change
after allocation. (These restrictions are made so a reference to an
object can be simply a pointer -- moving an object would require
updating all the pointers, and changing an object's size would require
moving it if there was another object right next to it.)
Objects are always accessed through pointers of the type 'PyObject *'.
The type 'PyObject' is a structure that only contains the reference count
1990-10-14 09:07:46 -03:00
and the type pointer. The actual memory allocated for an object
contains other data that can only be accessed after casting the pointer
to a pointer to a longer structure type. This longer type must start
with the reference count and type fields; the macro PyObject_HEAD should be
used for this (to accommodate for future changes). The implementation
1990-10-14 09:07:46 -03:00
of a particular object type can cast the object pointer to the proper
type and back.
A standard interface exists for objects that contain an array of items
whose size is determined when the object is allocated.
*/
/* Py_DEBUG implies Py_TRACE_REFS. */
#if defined(Py_DEBUG) && !defined(Py_TRACE_REFS)
#define Py_TRACE_REFS
#endif
1990-12-20 11:06:42 -04:00
/* Py_TRACE_REFS implies Py_REF_DEBUG. */
#if defined(Py_TRACE_REFS) && !defined(Py_REF_DEBUG)
#define Py_REF_DEBUG
#endif
1990-10-14 09:07:46 -03:00
#ifdef Py_TRACE_REFS
/* Define pointers to support a doubly-linked list of all live heap objects. */
#define _PyObject_HEAD_EXTRA \
struct _object *_ob_next; \
struct _object *_ob_prev;
#define _PyObject_EXTRA_INIT 0, 0,
#else
#define _PyObject_HEAD_EXTRA
#define _PyObject_EXTRA_INIT
#endif
/* PyObject_HEAD defines the initial segment of every PyObject. */
#define PyObject_HEAD \
_PyObject_HEAD_EXTRA \
Py_ssize_t ob_refcnt; \
1990-10-14 09:07:46 -03:00
struct _typeobject *ob_type;
#define PyObject_HEAD_INIT(type) \
_PyObject_EXTRA_INIT \
1, type,
/* PyObject_VAR_HEAD defines the initial segment of all variable-size
* container objects. These end with a declaration of an array with 1
* element, but enough space is malloc'ed so that the array actually
* has room for ob_size elements. Note that ob_size is an element count,
* not necessarily a byte count.
*/
#define PyObject_VAR_HEAD \
PyObject_HEAD \
2006-02-15 13:27:45 -04:00
Py_ssize_t ob_size; /* Number of items in variable part */
#define Py_INVALID_SIZE (Py_ssize_t)-1
/* Nothing is actually declared to be a PyObject, but every pointer to
* a Python object can be cast to a PyObject*. This is inheritance built
* by hand. Similarly every pointer to a variable-size Python object can,
* in addition, be cast to PyVarObject*.
*/
1990-10-14 09:07:46 -03:00
typedef struct _object {
PyObject_HEAD
} PyObject;
1990-10-14 09:07:46 -03:00
typedef struct {
PyObject_VAR_HEAD
} PyVarObject;
1990-10-14 09:07:46 -03:00
/*
Type objects contain a string containing the type name (to help somewhat
in debugging), the allocation parameters (see PyObject_New() and
PyObject_NewVar()),
and methods for accessing objects of the type. Methods are optional, a
1990-10-14 09:07:46 -03:00
nil pointer meaning that particular kind of access is not available for
this type. The Py_DECREF() macro uses the tp_dealloc method without
1990-10-14 09:07:46 -03:00
checking for a nil pointer; it should always be implemented except if
the implementation can guarantee that the reference count will never
reach zero (e.g., for statically allocated type objects).
1990-10-14 09:07:46 -03:00
NB: the methods for certain type groups are now contained in separate
method blocks.
*/
typedef PyObject * (*unaryfunc)(PyObject *);
typedef PyObject * (*binaryfunc)(PyObject *, PyObject *);
typedef PyObject * (*ternaryfunc)(PyObject *, PyObject *, PyObject *);
typedef int (*inquiry)(PyObject *);
2006-02-15 13:27:45 -04:00
typedef Py_ssize_t (*lenfunc)(PyObject *);
typedef int (*coercion)(PyObject **, PyObject **);
2006-02-15 13:27:45 -04:00
typedef PyObject *(*ssizeargfunc)(PyObject *, Py_ssize_t);
typedef PyObject *(*ssizessizeargfunc)(PyObject *, Py_ssize_t, Py_ssize_t);
typedef int(*ssizeobjargproc)(PyObject *, Py_ssize_t, PyObject *);
typedef int(*ssizessizeobjargproc)(PyObject *, Py_ssize_t, Py_ssize_t, PyObject *);
typedef int(*objobjargproc)(PyObject *, PyObject *, PyObject *);
2006-02-15 13:27:45 -04:00
/* ssize_t-based buffer interface */
typedef Py_ssize_t (*readbufferproc)(PyObject *, Py_ssize_t, void **);
typedef Py_ssize_t (*writebufferproc)(PyObject *, Py_ssize_t, void **);
typedef Py_ssize_t (*segcountproc)(PyObject *, Py_ssize_t *);
typedef Py_ssize_t (*charbufferproc)(PyObject *, Py_ssize_t, char **);
2006-02-15 13:27:45 -04:00
typedef int (*objobjproc)(PyObject *, PyObject *);
typedef int (*visitproc)(PyObject *, void *);
typedef int (*traverseproc)(PyObject *, visitproc, void *);
1990-10-14 09:07:46 -03:00
typedef struct {
/* Number implementations must check *both*
arguments for proper type and implement the necessary conversions
in the slot functions themselves. */
binaryfunc nb_add;
binaryfunc nb_subtract;
binaryfunc nb_multiply;
binaryfunc nb_remainder;
binaryfunc nb_divmod;
ternaryfunc nb_power;
unaryfunc nb_negative;
unaryfunc nb_positive;
unaryfunc nb_absolute;
inquiry nb_bool;
unaryfunc nb_invert;
binaryfunc nb_lshift;
binaryfunc nb_rshift;
binaryfunc nb_and;
binaryfunc nb_xor;
binaryfunc nb_or;
coercion nb_coerce;
unaryfunc nb_int;
unaryfunc nb_long;
unaryfunc nb_float;
unaryfunc nb_oct;
unaryfunc nb_hex;
binaryfunc nb_inplace_add;
binaryfunc nb_inplace_subtract;
binaryfunc nb_inplace_multiply;
binaryfunc nb_inplace_remainder;
ternaryfunc nb_inplace_power;
binaryfunc nb_inplace_lshift;
binaryfunc nb_inplace_rshift;
binaryfunc nb_inplace_and;
binaryfunc nb_inplace_xor;
binaryfunc nb_inplace_or;
binaryfunc nb_floor_divide;
binaryfunc nb_true_divide;
binaryfunc nb_inplace_floor_divide;
binaryfunc nb_inplace_true_divide;
Merge current trunk into p3yk. This includes the PyNumber_Index API change, which unfortunately means the errors from the bytes type change somewhat: bytes([300]) still raises a ValueError, but bytes([10**100]) now raises a TypeError (either that, or bytes(1.0) also raises a ValueError -- PyNumber_AsSsize_t() can only raise one type of exception.) Merged revisions 51188-51433 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r51189 | kurt.kaiser | 2006-08-10 19:11:09 +0200 (Thu, 10 Aug 2006) | 4 lines Retrieval of previous shell command was not always preserving indentation since 1.2a1) Patch 1528468 Tal Einat. ........ r51190 | guido.van.rossum | 2006-08-10 19:41:07 +0200 (Thu, 10 Aug 2006) | 3 lines Chris McDonough's patch to defend against certain DoS attacks on FieldStorage. SF bug #1112549. ........ r51191 | guido.van.rossum | 2006-08-10 19:42:50 +0200 (Thu, 10 Aug 2006) | 2 lines News item for SF bug 1112549. ........ r51192 | guido.van.rossum | 2006-08-10 20:09:25 +0200 (Thu, 10 Aug 2006) | 2 lines Fix title -- it's rc1, not beta3. ........ r51194 | martin.v.loewis | 2006-08-10 21:04:00 +0200 (Thu, 10 Aug 2006) | 3 lines Update dangling references to the 3.2 database to mention that this is UCD 4.1 now. ........ r51195 | tim.peters | 2006-08-11 00:45:34 +0200 (Fri, 11 Aug 2006) | 6 lines Followup to bug #1069160. PyThreadState_SetAsyncExc(): internal correctness changes wrt refcount safety and deadlock avoidance. Also added a basic test case (relying on ctypes) and repaired the docs. ........ r51196 | tim.peters | 2006-08-11 00:48:45 +0200 (Fri, 11 Aug 2006) | 2 lines Whitespace normalization. ........ r51197 | tim.peters | 2006-08-11 01:22:13 +0200 (Fri, 11 Aug 2006) | 5 lines Whitespace normalization broke test_cgi, because a line of quoted test data relied on preserving a single trailing blank. Changed the string from raw to regular, and forced in the trailing blank via an explicit \x20 escape. ........ r51198 | tim.peters | 2006-08-11 02:49:01 +0200 (Fri, 11 Aug 2006) | 10 lines test_PyThreadState_SetAsyncExc(): This is failing on some 64-bit boxes. I have no idea what the ctypes docs mean by "integers", and blind-guessing here that it intended to mean the signed C "int" type, in which case perhaps I can repair this by feeding the thread id argument to type ctypes.c_long(). Also made the worker thread daemonic, so it doesn't hang Python shutdown if the test continues to fail. ........ r51199 | tim.peters | 2006-08-11 05:49:10 +0200 (Fri, 11 Aug 2006) | 6 lines force_test_exit(): This has been completely ineffective at stopping test_signal from hanging forever on the Tru64 buildbot. That could be because there's no such thing as signal.SIGALARM. Changed to the idiotic (but standard) signal.SIGALRM instead, and added some more debug output. ........ r51202 | neal.norwitz | 2006-08-11 08:09:41 +0200 (Fri, 11 Aug 2006) | 6 lines Fix the failures on cygwin (2006-08-10 fixed the actual locking issue). The first hunk changes the colon to an ! like other Windows variants. We need to always wait on the child so the lock gets released and no other tests fail. This is the try/finally in the second hunk. ........ r51205 | georg.brandl | 2006-08-11 09:15:38 +0200 (Fri, 11 Aug 2006) | 3 lines Add Chris McDonough (latest cgi.py patch) ........ r51206 | georg.brandl | 2006-08-11 09:26:10 +0200 (Fri, 11 Aug 2006) | 3 lines logging's atexit hook now runs even if the rest of the module has already been cleaned up. ........ r51212 | thomas.wouters | 2006-08-11 17:02:39 +0200 (Fri, 11 Aug 2006) | 4 lines Add ignore of *.pyc and *.pyo to Lib/xml/etree/. ........ r51215 | thomas.heller | 2006-08-11 21:55:35 +0200 (Fri, 11 Aug 2006) | 7 lines When a ctypes C callback function is called, zero out the result storage before converting the result to C data. See the comment in the code for details. Provide a better context for errors when the conversion of a callback function's result cannot be converted. ........ r51218 | neal.norwitz | 2006-08-12 03:43:40 +0200 (Sat, 12 Aug 2006) | 6 lines Klocwork made another run and found a bunch more problems. This is the first batch of fixes that should be easy to verify based on context. This fixes problem numbers: 220 (ast), 323-324 (symtable), 321-322 (structseq), 215 (array), 210 (hotshot), 182 (codecs), 209 (etree). ........ r51219 | neal.norwitz | 2006-08-12 03:45:47 +0200 (Sat, 12 Aug 2006) | 9 lines Even though _Py_Mangle() isn't truly public anyone can call it and there was no verification that privateobj was a PyString. If it wasn't a string, this could have allowed a NULL pointer to creep in below and crash. I wonder if this should be PyString_CheckExact? Must identifiers be strings or can they be subclasses? Klocwork #275 ........ r51220 | neal.norwitz | 2006-08-12 03:46:42 +0200 (Sat, 12 Aug 2006) | 5 lines It's highly unlikely, though possible for PyEval_Get*() to return NULLs. So be safe and do an XINCREF. Klocwork # 221-222. ........ r51221 | neal.norwitz | 2006-08-12 03:47:59 +0200 (Sat, 12 Aug 2006) | 7 lines This code is actually not used unless WITHOUT_COMPLEX is defined. However, there was no error checking that PyFloat_FromDouble returned a valid pointer. I believe this change is correct as it seemed to follow other code in the area. Klocwork # 292. ........ r51222 | neal.norwitz | 2006-08-12 03:49:12 +0200 (Sat, 12 Aug 2006) | 5 lines Handle NULL nodes while parsing. I'm not entirely sure this is correct. There might be something else that needs to be done to setup the error. Klocwork #295. ........ r51223 | neal.norwitz | 2006-08-12 03:50:38 +0200 (Sat, 12 Aug 2006) | 6 lines If _stat_float_times is false, we will try to INCREF ival which could be NULL. Return early in that case. The caller checks for PyErr_Occurred so this should be ok. Klocwork #297 ........ r51224 | neal.norwitz | 2006-08-12 03:51:12 +0200 (Sat, 12 Aug 2006) | 3 lines Move the assert which checks for a NULL pointer first. Klocwork #274. ........ r51225 | neal.norwitz | 2006-08-12 03:53:28 +0200 (Sat, 12 Aug 2006) | 5 lines Try to handle a malloc failure. I'm not entirely sure this is correct. There might be something else we need to do to handle the exception. Klocwork # 212-213 ........ r51226 | neal.norwitz | 2006-08-12 03:57:47 +0200 (Sat, 12 Aug 2006) | 6 lines I'm not sure why this code allocates this string for the error message. I think it would be better to always use snprintf and have the format limit the size of the name appropriately (like %.200s). Klocwork #340 ........ r51227 | neal.norwitz | 2006-08-12 04:06:34 +0200 (Sat, 12 Aug 2006) | 3 lines Check returned pointer is valid. Klocwork #233 ........ r51228 | neal.norwitz | 2006-08-12 04:12:30 +0200 (Sat, 12 Aug 2006) | 1 line Whoops, how did that get in there. :-) Revert all the parts of 51227 that were not supposed to go it. Only Modules/_ctypes/cfields.c was supposed to be changed ........ r51229 | neal.norwitz | 2006-08-12 04:33:36 +0200 (Sat, 12 Aug 2006) | 4 lines Don't deref v if it's NULL. Klocwork #214 ........ r51230 | neal.norwitz | 2006-08-12 05:16:54 +0200 (Sat, 12 Aug 2006) | 5 lines Check return of PyMem_MALLOC (garbage) is non-NULL. Check seq in both portions of if/else. Klocwork #289-290. ........ r51231 | neal.norwitz | 2006-08-12 05:17:41 +0200 (Sat, 12 Aug 2006) | 4 lines PyModule_GetDict() can fail, produce fatal errors if this happens on startup. Klocwork #298-299. ........ r51232 | neal.norwitz | 2006-08-12 05:18:50 +0200 (Sat, 12 Aug 2006) | 5 lines Verify verdat which is returned from malloc is not NULL. Ensure we don't pass NULL to free. Klocwork #306 (at least the first part, checking malloc) ........ r51233 | tim.peters | 2006-08-12 06:42:47 +0200 (Sat, 12 Aug 2006) | 35 lines test_signal: Signal handling on the Tru64 buildbot appears to be utterly insane. Plug some theoretical insecurities in the test script: - Verify that the SIGALRM handler was actually installed. - Don't call alarm() before the handler is installed. - Move everything that can fail inside the try/finally, so the test cleans up after itself more often. - Try sending all the expected signals in force_test_exit(), not just SIGALRM. Since that was fixed to actually send SIGALRM (instead of invisibly dying with an AttributeError), we've seen that sending SIGALRM alone does not stop this from hanging. - Move the "kill the child" business into the finally clause, so the child doesn't survive test failure to send SIGALRM to other tests later (there are also baffling SIGALRM-related failures in test_socket). - Cancel the alarm in the finally clause -- if the test dies early, we again don't want SIGALRM showing up to confuse a later test. Alas, this still relies on timing luck wrt the spawned script that sends the test signals, but it's hard to see how waiting for seconds can so often be so unlucky. test_threadedsignals: curiously, this test never fails on Tru64, but doesn't normally signal SIGALRM. Anyway, fixed an obvious (but probably inconsequential) logic error. ........ r51234 | tim.peters | 2006-08-12 07:17:41 +0200 (Sat, 12 Aug 2006) | 8 lines Ah, fudge. One of the prints here actually "shouldn't be" protected by "if verbose:", which caused the test to fail on all non-Windows boxes. Note that I deliberately didn't convert this to unittest yet, because I expect it would be even harder to debug this on Tru64 after conversion. ........ r51235 | georg.brandl | 2006-08-12 10:32:02 +0200 (Sat, 12 Aug 2006) | 3 lines Repair logging test spew caused by rev. 51206. ........ r51236 | neal.norwitz | 2006-08-12 19:03:09 +0200 (Sat, 12 Aug 2006) | 8 lines Patch #1538606, Patch to fix __index__() clipping. I modified this patch some by fixing style, some error checking, and adding XXX comments. This patch requires review and some changes are to be expected. I'm checking in now to get the greatest possible review and establish a baseline for moving forward. I don't want this to hold up release if possible. ........ r51238 | neal.norwitz | 2006-08-12 20:44:06 +0200 (Sat, 12 Aug 2006) | 10 lines Fix a couple of bugs exposed by the new __index__ code. The 64-bit buildbots were failing due to inappropriate clipping of numbers larger than 2**31 with new-style classes. (typeobject.c) In reviewing the code for classic classes, there were 2 problems. Any negative value return could be returned. Always return -1 if there was an error. Also make the checks similar with the new-style classes. I believe this is correct for 32 and 64 bit boxes, including Windows64. Add a test of classic classes too. ........ r51240 | neal.norwitz | 2006-08-13 02:20:49 +0200 (Sun, 13 Aug 2006) | 1 line SF bug #1539336, distutils example code missing ........ r51245 | neal.norwitz | 2006-08-13 20:10:10 +0200 (Sun, 13 Aug 2006) | 6 lines Move/copy assert for tstate != NULL before first use. Verify that PyEval_Get{Globals,Locals} returned valid pointers. Klocwork 231-232 ........ r51246 | neal.norwitz | 2006-08-13 20:10:28 +0200 (Sun, 13 Aug 2006) | 5 lines Handle a whole lot of failures from PyString_FromInternedString(). Should fix most of Klocwork 234-272. ........ r51247 | neal.norwitz | 2006-08-13 20:10:47 +0200 (Sun, 13 Aug 2006) | 8 lines cpathname could be NULL if it was longer than MAXPATHLEN. Don't try to write the .pyc to NULL. Check results of PyList_GetItem() and PyModule_GetDict() are not NULL. Klocwork 282, 283, 285 ........ r51248 | neal.norwitz | 2006-08-13 20:11:08 +0200 (Sun, 13 Aug 2006) | 6 lines Fix segfault when doing string formatting on subclasses of long if __oct__, __hex__ don't return a string. Klocwork 308 ........ r51250 | neal.norwitz | 2006-08-13 20:11:27 +0200 (Sun, 13 Aug 2006) | 5 lines Check return result of PyModule_GetDict(). Fix a bunch of refleaks in the init of the module. This would only be found when running python -v. ........ r51251 | neal.norwitz | 2006-08-13 20:11:43 +0200 (Sun, 13 Aug 2006) | 5 lines Handle malloc and fopen failures more gracefully. Klocwork 180-181 ........ r51252 | neal.norwitz | 2006-08-13 20:12:03 +0200 (Sun, 13 Aug 2006) | 7 lines It's very unlikely, though possible that source is not a string. Verify that PyString_AsString() returns a valid pointer. (The problem can arise when zlib.decompress doesn't return a string.) Klocwork 346 ........ r51253 | neal.norwitz | 2006-08-13 20:12:26 +0200 (Sun, 13 Aug 2006) | 5 lines Handle failures from lookup. Klocwork 341-342 ........ r51254 | neal.norwitz | 2006-08-13 20:12:45 +0200 (Sun, 13 Aug 2006) | 6 lines Handle failure from PyModule_GetDict() (Klocwork 208). Fix a bunch of refleaks in the init of the module. This would only be found when running python -v. ........ r51255 | neal.norwitz | 2006-08-13 20:13:02 +0200 (Sun, 13 Aug 2006) | 4 lines Really address the issue of where to place the assert for leftblock. (Followup of Klocwork 274) ........ r51256 | neal.norwitz | 2006-08-13 20:13:36 +0200 (Sun, 13 Aug 2006) | 4 lines Handle malloc failure. Klocwork 281 ........ r51258 | neal.norwitz | 2006-08-13 20:40:39 +0200 (Sun, 13 Aug 2006) | 4 lines Handle alloca failures. Klocwork 225-228 ........ r51259 | neal.norwitz | 2006-08-13 20:41:15 +0200 (Sun, 13 Aug 2006) | 1 line Get rid of compiler warning ........ r51261 | neal.norwitz | 2006-08-14 02:51:15 +0200 (Mon, 14 Aug 2006) | 1 line Ignore pgen.exe and kill_python.exe for cygwin ........ r51262 | neal.norwitz | 2006-08-14 02:59:03 +0200 (Mon, 14 Aug 2006) | 4 lines Can't return NULL from a void function. If there is a memory error, about the best we can do is call PyErr_WriteUnraisable and go on. We won't be able to do the call below either, so verify delstr is valid. ........ r51263 | neal.norwitz | 2006-08-14 03:49:54 +0200 (Mon, 14 Aug 2006) | 1 line Update purify doc some. ........ r51264 | thomas.heller | 2006-08-14 09:13:05 +0200 (Mon, 14 Aug 2006) | 2 lines Remove unused, buggy test function. Fixes klockwork issue #207. ........ r51265 | thomas.heller | 2006-08-14 09:14:09 +0200 (Mon, 14 Aug 2006) | 2 lines Check for NULL return value from new_CArgObject(). Fixes klockwork issues #183, #184, #185. ........ r51266 | thomas.heller | 2006-08-14 09:50:14 +0200 (Mon, 14 Aug 2006) | 2 lines Check for NULL return value of GenericCData_new(). Fixes klockwork issues #188, #189. ........ r51274 | thomas.heller | 2006-08-14 12:02:24 +0200 (Mon, 14 Aug 2006) | 2 lines Revert the change that tries to zero out a closure's result storage area because the size if unknown in source/callproc.c. ........ r51276 | marc-andre.lemburg | 2006-08-14 12:55:19 +0200 (Mon, 14 Aug 2006) | 11 lines Slightly revised version of patch #1538956: Replace UnicodeDecodeErrors raised during == and != compares of Unicode and other objects with a new UnicodeWarning. All other comparisons continue to raise exceptions. Exceptions other than UnicodeDecodeErrors are also left untouched. ........ r51277 | thomas.heller | 2006-08-14 13:17:48 +0200 (Mon, 14 Aug 2006) | 13 lines Apply the patch #1532975 plus ideas from the patch #1533481. ctypes instances no longer have the internal and undocumented '_as_parameter_' attribute which was used to adapt them to foreign function calls; this mechanism is replaced by a function pointer in the type's stgdict. In the 'from_param' class methods, try the _as_parameter_ attribute if other conversions are not possible. This makes the documented _as_parameter_ mechanism work as intended. Change the ctypes version number to 1.0.1. ........ r51278 | marc-andre.lemburg | 2006-08-14 13:44:34 +0200 (Mon, 14 Aug 2006) | 3 lines Readd NEWS items that were accidentally removed by r51276. ........ r51279 | georg.brandl | 2006-08-14 14:36:06 +0200 (Mon, 14 Aug 2006) | 3 lines Improve markup in PyUnicode_RichCompare. ........ r51280 | marc-andre.lemburg | 2006-08-14 14:57:27 +0200 (Mon, 14 Aug 2006) | 3 lines Correct an accidentally removed previous patch. ........ r51281 | thomas.heller | 2006-08-14 18:17:41 +0200 (Mon, 14 Aug 2006) | 3 lines Patch #1536908: Add support for AMD64 / OpenBSD. Remove the -no-stack-protector compiler flag for OpenBSD as it has been reported to be unneeded. ........ r51282 | thomas.heller | 2006-08-14 18:20:04 +0200 (Mon, 14 Aug 2006) | 1 line News item for rev 51281. ........ r51283 | georg.brandl | 2006-08-14 22:25:39 +0200 (Mon, 14 Aug 2006) | 3 lines Fix refleak introduced in rev. 51248. ........ r51284 | georg.brandl | 2006-08-14 23:34:08 +0200 (Mon, 14 Aug 2006) | 5 lines Make tabnanny recognize IndentationErrors raised by tokenize. Add a test to test_inspect to make sure indented source is recognized correctly. (fixes #1224621) ........ r51285 | georg.brandl | 2006-08-14 23:42:55 +0200 (Mon, 14 Aug 2006) | 3 lines Patch #1535500: fix segfault in BZ2File.writelines and make sure it raises the correct exceptions. ........ r51287 | georg.brandl | 2006-08-14 23:45:32 +0200 (Mon, 14 Aug 2006) | 3 lines Add an additional test: BZ2File write methods should raise IOError when file is read-only. ........ r51289 | georg.brandl | 2006-08-14 23:55:28 +0200 (Mon, 14 Aug 2006) | 3 lines Patch #1536071: trace.py should now find the full module name of a file correctly even on Windows. ........ r51290 | georg.brandl | 2006-08-15 00:01:24 +0200 (Tue, 15 Aug 2006) | 3 lines Cookie.py shouldn't "bogusly" use string._idmap. ........ r51291 | georg.brandl | 2006-08-15 00:10:24 +0200 (Tue, 15 Aug 2006) | 3 lines Patch #1511317: don't crash on invalid hostname info ........ r51292 | tim.peters | 2006-08-15 02:25:04 +0200 (Tue, 15 Aug 2006) | 2 lines Whitespace normalization. ........ r51293 | neal.norwitz | 2006-08-15 06:14:57 +0200 (Tue, 15 Aug 2006) | 3 lines Georg fixed one of my bugs, so I'll repay him with 2 NEWS entries. Now we're even. :-) ........ r51295 | neal.norwitz | 2006-08-15 06:58:28 +0200 (Tue, 15 Aug 2006) | 8 lines Fix the test for SocketServer so it should pass on cygwin and not fail sporadically on other platforms. This is really a band-aid that doesn't fix the underlying issue in SocketServer. It's not clear if it's worth it to fix SocketServer, however, I opened a bug to track it: http://python.org/sf/1540386 ........ r51296 | neal.norwitz | 2006-08-15 06:59:30 +0200 (Tue, 15 Aug 2006) | 3 lines Update the docstring to use a version a little newer than 1999. This was taken from a Debian patch. Should we update the version for each release? ........ r51298 | neal.norwitz | 2006-08-15 08:29:03 +0200 (Tue, 15 Aug 2006) | 2 lines Subclasses of int/long are allowed to define an __index__. ........ r51300 | thomas.heller | 2006-08-15 15:07:21 +0200 (Tue, 15 Aug 2006) | 1 line Check for NULL return value from new_CArgObject calls. ........ r51303 | kurt.kaiser | 2006-08-16 05:15:26 +0200 (Wed, 16 Aug 2006) | 2 lines The 'with' statement is now a Code Context block opener ........ r51304 | anthony.baxter | 2006-08-16 05:42:26 +0200 (Wed, 16 Aug 2006) | 1 line preparing for 2.5c1 ........ r51305 | anthony.baxter | 2006-08-16 05:58:37 +0200 (Wed, 16 Aug 2006) | 1 line preparing for 2.5c1 - no, really this time ........ r51306 | kurt.kaiser | 2006-08-16 07:01:42 +0200 (Wed, 16 Aug 2006) | 9 lines Patch #1540892: site.py Quitter() class attempts to close sys.stdin before raising SystemExit, allowing IDLE to honor quit() and exit(). M Lib/site.py M Lib/idlelib/PyShell.py M Lib/idlelib/CREDITS.txt M Lib/idlelib/NEWS.txt M Misc/NEWS ........ r51307 | ka-ping.yee | 2006-08-16 09:02:50 +0200 (Wed, 16 Aug 2006) | 6 lines Update code and tests to support the 'bytes_le' attribute (for little-endian byte order on Windows), and to work around clocks with low resolution yielding duplicate UUIDs. Anthony Baxter has approved this change. ........ r51308 | kurt.kaiser | 2006-08-16 09:04:17 +0200 (Wed, 16 Aug 2006) | 2 lines Get quit() and exit() to work cleanly when not using subprocess. ........ r51309 | marc-andre.lemburg | 2006-08-16 10:13:26 +0200 (Wed, 16 Aug 2006) | 2 lines Revert to having static version numbers again. ........ r51310 | martin.v.loewis | 2006-08-16 14:55:10 +0200 (Wed, 16 Aug 2006) | 2 lines Build _hashlib on Windows. Build OpenSSL with masm assembler code. Fixes #1535502. ........ r51311 | thomas.heller | 2006-08-16 15:03:11 +0200 (Wed, 16 Aug 2006) | 6 lines Add commented assert statements to check that the result of PyObject_stgdict() and PyType_stgdict() calls are non-NULL before dereferencing the result. Hopefully this fixes what klocwork is complaining about. Fix a few other nits as well. ........ r51312 | anthony.baxter | 2006-08-16 15:08:25 +0200 (Wed, 16 Aug 2006) | 1 line news entry for 51307 ........ r51313 | andrew.kuchling | 2006-08-16 15:22:20 +0200 (Wed, 16 Aug 2006) | 1 line Add UnicodeWarning ........ r51314 | andrew.kuchling | 2006-08-16 15:41:52 +0200 (Wed, 16 Aug 2006) | 1 line Bump document version to 1.0; remove pystone paragraph ........ r51315 | andrew.kuchling | 2006-08-16 15:51:32 +0200 (Wed, 16 Aug 2006) | 1 line Link to docs; remove an XXX comment ........ r51316 | martin.v.loewis | 2006-08-16 15:58:51 +0200 (Wed, 16 Aug 2006) | 1 line Make cl build step compile-only (/c). Remove libs from source list. ........ r51317 | thomas.heller | 2006-08-16 16:07:44 +0200 (Wed, 16 Aug 2006) | 5 lines The __repr__ method of a NULL py_object does no longer raise an exception. Remove a stray '?' character from the exception text when the value is retrieved of such an object. Includes tests. ........ r51318 | andrew.kuchling | 2006-08-16 16:18:23 +0200 (Wed, 16 Aug 2006) | 1 line Update bug/patch counts ........ r51319 | andrew.kuchling | 2006-08-16 16:21:14 +0200 (Wed, 16 Aug 2006) | 1 line Wording/typo fixes ........ r51320 | thomas.heller | 2006-08-16 17:10:12 +0200 (Wed, 16 Aug 2006) | 9 lines Remove the special casing of Py_None when converting the return value of the Python part of a callback function to C. If it cannot be converted, call PyErr_WriteUnraisable with the exception we got. Before, arbitrary data has been passed to the calling C code in this case. (I'm not really sure the NEWS entry is understandable, but I cannot find better words) ........ r51321 | marc-andre.lemburg | 2006-08-16 18:11:01 +0200 (Wed, 16 Aug 2006) | 2 lines Add NEWS item mentioning the reverted distutils version number patch. ........ r51322 | fredrik.lundh | 2006-08-16 18:47:07 +0200 (Wed, 16 Aug 2006) | 5 lines SF#1534630 ignore data that arrives before the opening start tag ........ r51324 | andrew.kuchling | 2006-08-16 19:11:18 +0200 (Wed, 16 Aug 2006) | 1 line Grammar fix ........ r51328 | thomas.heller | 2006-08-16 20:02:11 +0200 (Wed, 16 Aug 2006) | 12 lines Tutorial: Clarify somewhat how parameters are passed to functions (especially explain what integer means). Correct the table - Python integers and longs can both be used. Further clarification to the table comparing ctypes types, Python types, and C types. Reference: Replace integer by C ``int`` where it makes sense. ........ r51329 | kurt.kaiser | 2006-08-16 23:45:59 +0200 (Wed, 16 Aug 2006) | 8 lines File menu hotkeys: there were three 'p' assignments. Reassign the 'Save Copy As' and 'Print' hotkeys to 'y' and 't'. Change the Shell menu hotkey from 's' to 'l'. M Bindings.py M PyShell.py M NEWS.txt ........ r51330 | neil.schemenauer | 2006-08-17 01:38:05 +0200 (Thu, 17 Aug 2006) | 3 lines Fix a bug in the ``compiler`` package that caused invalid code to be generated for generator expressions. ........ r51342 | martin.v.loewis | 2006-08-17 21:19:32 +0200 (Thu, 17 Aug 2006) | 3 lines Merge 51340 and 51341 from 2.5 branch: Leave tk build directory to restore original path. Invoke debug mk1mf.pl after running Configure. ........ r51354 | martin.v.loewis | 2006-08-18 05:47:18 +0200 (Fri, 18 Aug 2006) | 3 lines Bug #1541863: uuid.uuid1 failed to generate unique identifiers on systems with low clock resolution. ........ r51355 | neal.norwitz | 2006-08-18 05:57:54 +0200 (Fri, 18 Aug 2006) | 1 line Add template for 2.6 on HEAD ........ r51356 | neal.norwitz | 2006-08-18 06:01:38 +0200 (Fri, 18 Aug 2006) | 1 line More post-release wibble ........ r51357 | neal.norwitz | 2006-08-18 06:58:33 +0200 (Fri, 18 Aug 2006) | 1 line Try to get Windows bots working again ........ r51358 | neal.norwitz | 2006-08-18 07:10:00 +0200 (Fri, 18 Aug 2006) | 1 line Try to get Windows bots working again. Take 2 ........ r51359 | neal.norwitz | 2006-08-18 07:39:20 +0200 (Fri, 18 Aug 2006) | 1 line Try to get Unix bots install working again. ........ r51360 | neal.norwitz | 2006-08-18 07:41:46 +0200 (Fri, 18 Aug 2006) | 1 line Set version to 2.6a0, seems more consistent. ........ r51362 | neal.norwitz | 2006-08-18 08:14:52 +0200 (Fri, 18 Aug 2006) | 1 line More version wibble ........ r51364 | georg.brandl | 2006-08-18 09:27:59 +0200 (Fri, 18 Aug 2006) | 4 lines Bug #1541682: Fix example in the "Refcount details" API docs. Additionally, remove a faulty example showing PySequence_SetItem applied to a newly created list object and add notes that this isn't a good idea. ........ r51366 | anthony.baxter | 2006-08-18 09:29:02 +0200 (Fri, 18 Aug 2006) | 3 lines Updating IDLE's version number to match Python's (as per python-dev discussion). ........ r51367 | anthony.baxter | 2006-08-18 09:30:07 +0200 (Fri, 18 Aug 2006) | 1 line RPM specfile updates ........ r51368 | georg.brandl | 2006-08-18 09:35:47 +0200 (Fri, 18 Aug 2006) | 2 lines Typo in tp_clear docs. ........ r51378 | andrew.kuchling | 2006-08-18 15:57:13 +0200 (Fri, 18 Aug 2006) | 1 line Minor edits ........ r51379 | thomas.heller | 2006-08-18 16:38:46 +0200 (Fri, 18 Aug 2006) | 6 lines Add asserts to check for 'impossible' NULL values, with comments. In one place where I'n not 1000% sure about the non-NULL, raise a RuntimeError for safety. This should fix the klocwork issues that Neal sent me. If so, it should be applied to the release25-maint branch also. ........ r51400 | neal.norwitz | 2006-08-19 06:22:33 +0200 (Sat, 19 Aug 2006) | 5 lines Move initialization of interned strings to before allocating the object so we don't leak op. (Fixes an earlier patch to this code) Klockwork #350 ........ r51401 | neal.norwitz | 2006-08-19 06:23:04 +0200 (Sat, 19 Aug 2006) | 4 lines Move assert to after NULL check, otherwise we deref NULL in the assert. Klocwork #307 ........ r51402 | neal.norwitz | 2006-08-19 06:25:29 +0200 (Sat, 19 Aug 2006) | 2 lines SF #1542693: Remove semi-colon at end of PyImport_ImportModuleEx macro ........ r51403 | neal.norwitz | 2006-08-19 06:28:55 +0200 (Sat, 19 Aug 2006) | 6 lines Move initialization to after the asserts for non-NULL values. Klocwork 286-287. (I'm not backporting this, but if someone wants to, feel free.) ........ r51404 | neal.norwitz | 2006-08-19 06:52:03 +0200 (Sat, 19 Aug 2006) | 6 lines Handle PyString_FromInternedString() failing (unlikely, but possible). Klocwork #325 (I'm not backporting this, but if someone wants to, feel free.) ........ r51416 | georg.brandl | 2006-08-20 15:15:39 +0200 (Sun, 20 Aug 2006) | 2 lines Patch #1542948: fix urllib2 header casing issue. With new test. ........ r51428 | jeremy.hylton | 2006-08-21 18:19:37 +0200 (Mon, 21 Aug 2006) | 3 lines Move peephole optimizer to separate file. ........ r51429 | jeremy.hylton | 2006-08-21 18:20:29 +0200 (Mon, 21 Aug 2006) | 2 lines Move peephole optimizer to separate file. (Forgot .h in previous checkin.) ........ r51432 | neal.norwitz | 2006-08-21 19:59:46 +0200 (Mon, 21 Aug 2006) | 5 lines Fix bug #1543303, tarfile adds padding that breaks gunzip. Patch # 1543897. Will backport to 2.5 ........ r51433 | neal.norwitz | 2006-08-21 20:01:30 +0200 (Mon, 21 Aug 2006) | 2 lines Add assert to make Klocwork happy (#276) ........
2006-08-21 16:07:27 -03:00
unaryfunc nb_index;
} PyNumberMethods;
1990-10-14 09:07:46 -03:00
typedef struct {
2006-02-15 13:27:45 -04:00
lenfunc sq_length;
binaryfunc sq_concat;
2006-02-15 13:27:45 -04:00
ssizeargfunc sq_repeat;
ssizeargfunc sq_item;
ssizessizeargfunc sq_slice;
ssizeobjargproc sq_ass_item;
ssizessizeobjargproc sq_ass_slice;
objobjproc sq_contains;
binaryfunc sq_inplace_concat;
2006-02-15 13:27:45 -04:00
ssizeargfunc sq_inplace_repeat;
} PySequenceMethods;
1990-10-14 09:07:46 -03:00
typedef struct {
2006-02-15 13:27:45 -04:00
lenfunc mp_length;
binaryfunc mp_subscript;
objobjargproc mp_ass_subscript;
} PyMappingMethods;
1990-10-14 09:07:46 -03:00
typedef struct {
2006-02-15 13:27:45 -04:00
readbufferproc bf_getreadbuffer;
writebufferproc bf_getwritebuffer;
segcountproc bf_getsegcount;
charbufferproc bf_getcharbuffer;
} PyBufferProcs;
typedef void (*freefunc)(void *);
typedef void (*destructor)(PyObject *);
typedef int (*printfunc)(PyObject *, FILE *, int);
typedef PyObject *(*getattrfunc)(PyObject *, char *);
typedef PyObject *(*getattrofunc)(PyObject *, PyObject *);
typedef int (*setattrfunc)(PyObject *, char *, PyObject *);
typedef int (*setattrofunc)(PyObject *, PyObject *, PyObject *);
typedef int (*cmpfunc)(PyObject *, PyObject *);
typedef PyObject *(*reprfunc)(PyObject *);
typedef long (*hashfunc)(PyObject *);
typedef PyObject *(*richcmpfunc) (PyObject *, PyObject *, int);
typedef PyObject *(*getiterfunc) (PyObject *);
typedef PyObject *(*iternextfunc) (PyObject *);
2001-08-02 01:15:00 -03:00
typedef PyObject *(*descrgetfunc) (PyObject *, PyObject *, PyObject *);
typedef int (*descrsetfunc) (PyObject *, PyObject *, PyObject *);
typedef int (*initproc)(PyObject *, PyObject *, PyObject *);
typedef PyObject *(*newfunc)(struct _typeobject *, PyObject *, PyObject *);
2006-02-15 13:27:45 -04:00
typedef PyObject *(*allocfunc)(struct _typeobject *, Py_ssize_t);
1990-10-14 09:07:46 -03:00
typedef struct _typeobject {
PyObject_VAR_HEAD
const char *tp_name; /* For printing, in format "<module>.<name>" */
Py_ssize_t tp_basicsize, tp_itemsize; /* For allocation */
1990-10-14 09:07:46 -03:00
/* Methods to implement standard operations */
destructor tp_dealloc;
printfunc tp_print;
getattrfunc tp_getattr;
setattrfunc tp_setattr;
cmpfunc tp_compare;
reprfunc tp_repr;
1990-10-14 09:07:46 -03:00
/* Method suites for standard classes */
PyNumberMethods *tp_as_number;
PySequenceMethods *tp_as_sequence;
PyMappingMethods *tp_as_mapping;
/* More standard operations (here for binary compatibility) */
hashfunc tp_hash;
ternaryfunc tp_call;
reprfunc tp_str;
getattrofunc tp_getattro;
setattrofunc tp_setattro;
/* Functions to access object as input/output buffer */
PyBufferProcs *tp_as_buffer;
/* Flags to define presence of optional/expanded features */
long tp_flags;
const char *tp_doc; /* Documentation string */
/* Assigned meaning in release 2.0 */
/* call function for all accessible objects */
traverseproc tp_traverse;
/* delete references to contained objects */
inquiry tp_clear;
/* Assigned meaning in release 2.1 */
/* rich comparisons */
richcmpfunc tp_richcompare;
/* weak reference enabler */
Py_ssize_t tp_weaklistoffset;
/* Iterators */
getiterfunc tp_iter;
iternextfunc tp_iternext;
2001-08-02 01:15:00 -03:00
/* Attribute descriptor and subclassing stuff */
struct PyMethodDef *tp_methods;
struct PyMemberDef *tp_members;
struct PyGetSetDef *tp_getset;
2001-08-02 01:15:00 -03:00
struct _typeobject *tp_base;
PyObject *tp_dict;
descrgetfunc tp_descr_get;
descrsetfunc tp_descr_set;
Py_ssize_t tp_dictoffset;
2001-08-02 01:15:00 -03:00
initproc tp_init;
allocfunc tp_alloc;
newfunc tp_new;
freefunc tp_free; /* Low-level free-memory routine */
inquiry tp_is_gc; /* For PyObject_IS_GC */
2001-08-02 01:15:00 -03:00
PyObject *tp_bases;
PyObject *tp_mro; /* method resolution order */
PyObject *tp_cache;
PyObject *tp_subclasses;
PyObject *tp_weaklist;
destructor tp_del;
2001-08-02 01:15:00 -03:00
#ifdef COUNT_ALLOCS
/* these must be last and never explicitly initialized */
Py_ssize_t tp_allocs;
Py_ssize_t tp_frees;
Py_ssize_t tp_maxalloc;
struct _typeobject *tp_prev;
struct _typeobject *tp_next;
#endif
} PyTypeObject;
1990-10-14 09:07:46 -03:00
/* The *real* layout of a type object when allocated on the heap */
typedef struct _heaptypeobject {
/* Note: there's a dependency on the order of these members
in slotptr() in typeobject.c . */
PyTypeObject ht_type;
PyNumberMethods as_number;
PyMappingMethods as_mapping;
PySequenceMethods as_sequence; /* as_sequence comes after as_mapping,
so that the mapping wins when both
the mapping and the sequence define
a given operator (e.g. __getitem__).
see add_operators() in typeobject.c . */
PyBufferProcs as_buffer;
PyObject *ht_name, *ht_slots;
/* here are optional user slots, followed by the members. */
} PyHeapTypeObject;
/* access macro to the members which are floating "behind" the object */
#define PyHeapType_GET_MEMBERS(etype) \
((PyMemberDef *)(((char *)etype) + (etype)->ht_type.ob_type->tp_basicsize))
2001-08-02 01:15:00 -03:00
/* Generic type check */
PyAPI_FUNC(int) PyType_IsSubtype(PyTypeObject *, PyTypeObject *);
2001-08-02 01:15:00 -03:00
#define PyObject_TypeCheck(ob, tp) \
((ob)->ob_type == (tp) || PyType_IsSubtype((ob)->ob_type, (tp)))
PyAPI_DATA(PyTypeObject) PyType_Type; /* built-in 'type' */
PyAPI_DATA(PyTypeObject) PyBaseObject_Type; /* built-in 'object' */
PyAPI_DATA(PyTypeObject) PySuper_Type; /* built-in 'super' */
2001-08-02 01:15:00 -03:00
Merged revisions 53875-53911 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r53899 | neal.norwitz | 2007-02-25 16:52:27 +0100 (Sun, 25 Feb 2007) | 1 line Add more details when releasing interned strings ........ r53900 | neal.norwitz | 2007-02-25 16:53:36 +0100 (Sun, 25 Feb 2007) | 1 line Whitespace only changes ........ r53901 | jeremy.hylton | 2007-02-25 16:57:45 +0100 (Sun, 25 Feb 2007) | 8 lines Fix crash in exec when unicode filename can't be decoded. I can't think of an easy way to test this behavior. It only occurs when the file system default encoding and the interpreter default encoding are different, such that you can open the file but not decode its name. ........ r53902 | jeremy.hylton | 2007-02-25 17:01:58 +0100 (Sun, 25 Feb 2007) | 2 lines Put declarations before code. ........ r53910 | fred.drake | 2007-02-25 18:56:27 +0100 (Sun, 25 Feb 2007) | 3 lines - SF patch #1657613: add documentation for the Element interface - clean up bogus use of the {datadescni} environment everywhere ........ r53911 | neal.norwitz | 2007-02-25 20:44:48 +0100 (Sun, 25 Feb 2007) | 17 lines Variation of patch # 1624059 to speed up checking if an object is a subclass of some of the common builtin types. Use a bit in tp_flags for each common builtin type. Check the bit to determine if any instance is a subclass of these common types. The check avoids a function call and O(n) search of the base classes. The check is done in the various Py*_Check macros rather than calling PyType_IsSubtype(). All the bits are set in tp_flags when the type is declared in the Objects/*object.c files because PyType_Ready() is not called for all the types. Should PyType_Ready() be called for all types? If so and the change is made, the changes to the Objects/*object.c files can be reverted (remove setting the tp_flags). Objects/typeobject.c would also have to be modified to add conditions for Py*_CheckExact() in addition to each the PyType_IsSubtype check. ........
2007-02-25 16:39:11 -04:00
#define PyType_Check(op) \
PyType_FastSubclass((op)->ob_type, Py_TPFLAGS_TYPE_SUBCLASS)
#define PyType_CheckExact(op) ((op)->ob_type == &PyType_Type)
2001-08-02 01:15:00 -03:00
PyAPI_FUNC(int) PyType_Ready(PyTypeObject *);
2006-02-15 13:27:45 -04:00
PyAPI_FUNC(PyObject *) PyType_GenericAlloc(PyTypeObject *, Py_ssize_t);
PyAPI_FUNC(PyObject *) PyType_GenericNew(PyTypeObject *,
2001-08-02 01:15:00 -03:00
PyObject *, PyObject *);
PyAPI_FUNC(PyObject *) _PyType_Lookup(PyTypeObject *, PyObject *);
1990-10-14 09:07:46 -03:00
1990-12-20 11:06:42 -04:00
/* Generic operations on objects */
PyAPI_FUNC(int) PyObject_Print(PyObject *, FILE *, int);
Merged revisions 53451-53537 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r53454 | brett.cannon | 2007-01-15 20:12:08 +0100 (Mon, 15 Jan 2007) | 3 lines Add a note for strptime that just because strftime supports some extra directive that is not documented that strptime will as well. ........ r53458 | vinay.sajip | 2007-01-16 10:50:07 +0100 (Tue, 16 Jan 2007) | 1 line Updated rotating file handlers to use _open(). ........ r53459 | marc-andre.lemburg | 2007-01-16 14:03:06 +0100 (Tue, 16 Jan 2007) | 2 lines Add news items for the recent pybench and platform changes. ........ r53460 | sjoerd.mullender | 2007-01-16 17:42:38 +0100 (Tue, 16 Jan 2007) | 4 lines Fixed ntpath.expandvars to not replace references to non-existing variables with nothing. Also added tests. This fixes bug #494589. ........ r53464 | neal.norwitz | 2007-01-17 07:23:51 +0100 (Wed, 17 Jan 2007) | 1 line Give Calvin Spealman access for python-dev summaries. ........ r53465 | neal.norwitz | 2007-01-17 09:37:26 +0100 (Wed, 17 Jan 2007) | 1 line Remove Calvin since he only has access to the website currently. ........ r53466 | thomas.heller | 2007-01-17 10:40:34 +0100 (Wed, 17 Jan 2007) | 2 lines Replace C++ comments with C comments. ........ r53472 | andrew.kuchling | 2007-01-17 20:55:06 +0100 (Wed, 17 Jan 2007) | 1 line [Part of bug #1599254] Add suggestion to Mailbox docs to use Maildir, and warn user to lock/unlock mailboxes when modifying them ........ r53475 | georg.brandl | 2007-01-17 22:09:04 +0100 (Wed, 17 Jan 2007) | 2 lines Bug #1637967: missing //= operator in list. ........ r53477 | georg.brandl | 2007-01-17 22:19:58 +0100 (Wed, 17 Jan 2007) | 2 lines Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next docs. ........ r53481 | neal.norwitz | 2007-01-18 06:40:58 +0100 (Thu, 18 Jan 2007) | 1 line Try reverting part of r53145 that seems to cause the Windows buildbots to fail in test_uu.UUFileTest.test_encode ........ r53482 | fred.drake | 2007-01-18 06:42:30 +0100 (Thu, 18 Jan 2007) | 1 line add missing version entry ........ r53483 | neal.norwitz | 2007-01-18 07:20:55 +0100 (Thu, 18 Jan 2007) | 7 lines This test doesn't pass on Windows. The cause seems to be that chmod doesn't support the same funcationality as on Unix. I'm not sure if this fix is the best (or if it will even work)--it's a test to see if the buildbots start passing again. It might be better to not even run this test if it's windows (or non-posix). ........ r53488 | neal.norwitz | 2007-01-19 06:53:33 +0100 (Fri, 19 Jan 2007) | 1 line SF #1635217, Fix unbalanced paren ........ r53489 | martin.v.loewis | 2007-01-19 07:42:22 +0100 (Fri, 19 Jan 2007) | 3 lines Prefix AST symbols with _Py_. Fixes #1637022. Will backport. ........ r53497 | martin.v.loewis | 2007-01-19 19:01:38 +0100 (Fri, 19 Jan 2007) | 2 lines Add UUIDs for 2.5.1 and 2.5.2 ........ r53499 | raymond.hettinger | 2007-01-19 19:07:18 +0100 (Fri, 19 Jan 2007) | 1 line SF# 1635892: Fix docs for betavariate's input parameters . ........ r53503 | martin.v.loewis | 2007-01-20 15:05:39 +0100 (Sat, 20 Jan 2007) | 2 lines Merge 53501 and 53502 from 25 branch: Add /GS- for AMD64 and Itanium builds where missing. ........ r53504 | walter.doerwald | 2007-01-20 18:28:31 +0100 (Sat, 20 Jan 2007) | 2 lines Port test_resource.py to unittest. ........ r53505 | walter.doerwald | 2007-01-20 19:19:33 +0100 (Sat, 20 Jan 2007) | 2 lines Add argument tests an calls of resource.getrusage(). ........ r53506 | walter.doerwald | 2007-01-20 20:03:17 +0100 (Sat, 20 Jan 2007) | 2 lines resource.RUSAGE_BOTH might not exist. ........ r53507 | walter.doerwald | 2007-01-21 00:07:28 +0100 (Sun, 21 Jan 2007) | 2 lines Port test_new.py to unittest. ........ r53508 | martin.v.loewis | 2007-01-21 10:33:07 +0100 (Sun, 21 Jan 2007) | 2 lines Patch #1610575: Add support for _Bool to struct. ........ r53509 | georg.brandl | 2007-01-21 11:28:43 +0100 (Sun, 21 Jan 2007) | 3 lines Bug #1486663: don't reject keyword arguments for subclasses of builtin types. ........ r53511 | georg.brandl | 2007-01-21 11:35:10 +0100 (Sun, 21 Jan 2007) | 2 lines Patch #1627441: close sockets properly in urllib2. ........ r53517 | georg.brandl | 2007-01-22 20:40:21 +0100 (Mon, 22 Jan 2007) | 3 lines Use new email module names (#1637162, #1637159, #1637157). ........ r53518 | andrew.kuchling | 2007-01-22 21:26:40 +0100 (Mon, 22 Jan 2007) | 1 line Improve pattern used for mbox 'From' lines; add a simple test ........ r53519 | andrew.kuchling | 2007-01-22 21:27:50 +0100 (Mon, 22 Jan 2007) | 1 line Make comment match the code ........ r53522 | georg.brandl | 2007-01-22 22:10:33 +0100 (Mon, 22 Jan 2007) | 2 lines Bug #1249573: fix rfc822.parsedate not accepting a certain date format ........ r53524 | georg.brandl | 2007-01-22 22:23:41 +0100 (Mon, 22 Jan 2007) | 2 lines Bug #1627316: handle error in condition/ignore pdb commands more gracefully. ........ r53526 | lars.gustaebel | 2007-01-23 12:17:33 +0100 (Tue, 23 Jan 2007) | 4 lines Patch #1507247: tarfile.py: use current umask for intermediate directories. ........ r53527 | thomas.wouters | 2007-01-23 14:42:00 +0100 (Tue, 23 Jan 2007) | 13 lines SF patch #1630975: Fix crash when replacing sys.stdout in sitecustomize When running the interpreter in an environment that would cause it to set stdout/stderr/stdin's encoding, having a sitecustomize that would replace them with something other than PyFile objects would crash the interpreter. Fix it by simply ignoring the encoding-setting for non-files. This could do with a test, but I can think of no maintainable and portable way to test this bug, short of adding a sitecustomize.py to the buildsystem and have it always run with it (hmmm....) ........ r53528 | thomas.wouters | 2007-01-23 14:50:49 +0100 (Tue, 23 Jan 2007) | 4 lines Add news entry about last checkin (oops.) ........ r53531 | martin.v.loewis | 2007-01-23 22:11:47 +0100 (Tue, 23 Jan 2007) | 4 lines Make PyTraceBack_Here use the current thread, not the frame's thread state. Fixes #1579370. Will backport. ........ r53535 | brett.cannon | 2007-01-24 00:21:22 +0100 (Wed, 24 Jan 2007) | 5 lines Fix crasher for when an object's __del__ creates a new weakref to itself. Patch only fixes new-style classes; classic classes still buggy. Closes bug #1377858. Already backported. ........ r53536 | walter.doerwald | 2007-01-24 01:42:19 +0100 (Wed, 24 Jan 2007) | 2 lines Port test_popen.py to unittest. ........
2007-02-01 14:02:27 -04:00
PyAPI_FUNC(void) _Py_BreakPoint(void);
PyAPI_FUNC(void) _PyObject_Dump(PyObject *);
PyAPI_FUNC(PyObject *) PyObject_Repr(PyObject *);
PyAPI_FUNC(PyObject *) PyObject_ReprStr8(PyObject *);
PyAPI_FUNC(PyObject *) _PyObject_Str(PyObject *);
PyAPI_FUNC(PyObject *) PyObject_Str(PyObject *);
PyAPI_FUNC(PyObject *) PyObject_Unicode(PyObject *);
PyAPI_FUNC(int) PyObject_Compare(PyObject *, PyObject *);
PyAPI_FUNC(PyObject *) PyObject_RichCompare(PyObject *, PyObject *, int);
PyAPI_FUNC(int) PyObject_RichCompareBool(PyObject *, PyObject *, int);
Restructure comparison dramatically. There is no longer a default *ordering* between objects; there is only a default equality test (defined by an object being equal to itself only). Read the comment in object.c. The current implementation never uses a three-way comparison to compute a rich comparison, but it does use a rich comparison to compute a three-way comparison. I'm not quite done ripping out all the calls to PyObject_Compare/Cmp, or replacing tp_compare implementations with tp_richcompare implementations; but much of that has happened (to make most unit tests pass). The following tests still fail, because I need help deciding or understanding: test_codeop -- depends on comparing code objects test_datetime -- need Tim Peters' opinion test_marshal -- depends on comparing code objects test_mutants -- need help understanding it The problem with test_codeop and test_marshal is this: these tests compare two different code objects and expect them to be equal. Is that still a feature we'd like to support? I've temporarily removed the comparison and hash code from code objects, so they use the default (equality by pointer only) comparison. For the other two tests, run them to see for yourself. (There may be more failing test with "-u all".) A general problem with getting lots of these tests to pass is the reality that for object types that have a natural total ordering, implementing __cmp__ is much more convenient than implementing __eq__, __ne__, __lt__, and so on. Should we go back to allowing __cmp__ to provide a total ordering? Should we provide some other way to implement rich comparison with a single method override? Alex proposed a __key__() method; I've considered a __richcmp__() method. Or perhaps __cmp__() just shouldn't be killed off...
2006-08-23 21:41:19 -03:00
PyAPI_FUNC(PyObject *) Py_CmpToRich(int op, int cmp);
PyAPI_FUNC(PyObject *) PyObject_GetAttrString(PyObject *, const char *);
PyAPI_FUNC(int) PyObject_SetAttrString(PyObject *, const char *, PyObject *);
PyAPI_FUNC(int) PyObject_HasAttrString(PyObject *, const char *);
PyAPI_FUNC(PyObject *) PyObject_GetAttr(PyObject *, PyObject *);
PyAPI_FUNC(int) PyObject_SetAttr(PyObject *, PyObject *, PyObject *);
PyAPI_FUNC(int) PyObject_HasAttr(PyObject *, PyObject *);
PyAPI_FUNC(PyObject **) _PyObject_GetDictPtr(PyObject *);
PyAPI_FUNC(PyObject *) PyObject_SelfIter(PyObject *);
PyAPI_FUNC(PyObject *) PyObject_GenericGetAttr(PyObject *, PyObject *);
PyAPI_FUNC(int) PyObject_GenericSetAttr(PyObject *,
2001-08-02 01:15:00 -03:00
PyObject *, PyObject *);
PyAPI_FUNC(long) PyObject_Hash(PyObject *);
PyAPI_FUNC(int) PyObject_IsTrue(PyObject *);
PyAPI_FUNC(int) PyObject_Not(PyObject *);
PyAPI_FUNC(int) PyCallable_Check(PyObject *);
1990-10-14 09:07:46 -03:00
PyAPI_FUNC(void) PyObject_ClearWeakRefs(PyObject *);
/* A slot function whose address we need to compare */
extern int _PyObject_SlotCompare(PyObject *, PyObject *);
/* PyObject_Dir(obj) acts like Python __builtin__.dir(obj), returning a
list of strings. PyObject_Dir(NULL) is like __builtin__.dir(),
returning the names of the current locals. In this case, if there are
no current locals, NULL is returned, and PyErr_Occurred() is false.
*/
PyAPI_FUNC(PyObject *) PyObject_Dir(PyObject *);
/* Helpers for printing recursive container types */
PyAPI_FUNC(int) Py_ReprEnter(PyObject *);
PyAPI_FUNC(void) Py_ReprLeave(PyObject *);
/* Helpers for hash functions */
PyAPI_FUNC(long) _Py_HashDouble(double);
PyAPI_FUNC(long) _Py_HashPointer(void*);
/* Helper for passing objects to printf and the like */
#define PyObject_REPR(obj) PyString_AS_STRING(PyObject_ReprStr8(obj))
1990-10-14 09:07:46 -03:00
/* Flag bits for printing: */
#define Py_PRINT_RAW 1 /* No string quotes etc. */
1990-10-14 09:07:46 -03:00
/*
`Type flags (tp_flags)
These flags are used to extend the type structure in a backwards-compatible
fashion. Extensions can use the flags to indicate (and test) when a given
type structure contains a new feature. The Python core will use these when
introducing new functionality between major revisions (to avoid mid-version
changes in the PYTHON_API_VERSION).
Arbitration of the flag bit positions will need to be coordinated among
all extension writers who publically release their extensions (this will
be fewer than you might expect!)..
Most flags were removed as of Python 3.0 to make room for new flags. (Some
flags are not for backwards compatibility but to indicate the presence of an
optional feature; these flags remain of course.)
Type definitions should use Py_TPFLAGS_DEFAULT for their tp_flags value.
Code can use PyType_HasFeature(type_ob, flag_value) to test whether the
given type object has a specified feature.
*/
2001-08-02 01:15:00 -03:00
/* Set if the type object is dynamically allocated */
#define Py_TPFLAGS_HEAPTYPE (1L<<9)
/* Set if the type allows subclassing */
#define Py_TPFLAGS_BASETYPE (1L<<10)
/* Set if the type is 'ready' -- fully initialized */
#define Py_TPFLAGS_READY (1L<<12)
/* Set while the type is being 'readied', to prevent recursive ready calls */
#define Py_TPFLAGS_READYING (1L<<13)
/* Objects support garbage collection (see objimp.h) */
#define Py_TPFLAGS_HAVE_GC (1L<<14)
/* These two bits are preserved for Stackless Python, next after this is 17 */
#ifdef STACKLESS
#define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION (3L<<15)
#else
#define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION 0
#endif
Merged revisions 53875-53911 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r53899 | neal.norwitz | 2007-02-25 16:52:27 +0100 (Sun, 25 Feb 2007) | 1 line Add more details when releasing interned strings ........ r53900 | neal.norwitz | 2007-02-25 16:53:36 +0100 (Sun, 25 Feb 2007) | 1 line Whitespace only changes ........ r53901 | jeremy.hylton | 2007-02-25 16:57:45 +0100 (Sun, 25 Feb 2007) | 8 lines Fix crash in exec when unicode filename can't be decoded. I can't think of an easy way to test this behavior. It only occurs when the file system default encoding and the interpreter default encoding are different, such that you can open the file but not decode its name. ........ r53902 | jeremy.hylton | 2007-02-25 17:01:58 +0100 (Sun, 25 Feb 2007) | 2 lines Put declarations before code. ........ r53910 | fred.drake | 2007-02-25 18:56:27 +0100 (Sun, 25 Feb 2007) | 3 lines - SF patch #1657613: add documentation for the Element interface - clean up bogus use of the {datadescni} environment everywhere ........ r53911 | neal.norwitz | 2007-02-25 20:44:48 +0100 (Sun, 25 Feb 2007) | 17 lines Variation of patch # 1624059 to speed up checking if an object is a subclass of some of the common builtin types. Use a bit in tp_flags for each common builtin type. Check the bit to determine if any instance is a subclass of these common types. The check avoids a function call and O(n) search of the base classes. The check is done in the various Py*_Check macros rather than calling PyType_IsSubtype(). All the bits are set in tp_flags when the type is declared in the Objects/*object.c files because PyType_Ready() is not called for all the types. Should PyType_Ready() be called for all types? If so and the change is made, the changes to the Objects/*object.c files can be reverted (remove setting the tp_flags). Objects/typeobject.c would also have to be modified to add conditions for Py*_CheckExact() in addition to each the PyType_IsSubtype check. ........
2007-02-25 16:39:11 -04:00
/* These flags are used to determine if a type is a subclass. */
#define Py_TPFLAGS_INT_SUBCLASS (1L<<23)
#define Py_TPFLAGS_LONG_SUBCLASS (1L<<24)
#define Py_TPFLAGS_LIST_SUBCLASS (1L<<25)
#define Py_TPFLAGS_TUPLE_SUBCLASS (1L<<26)
#define Py_TPFLAGS_STRING_SUBCLASS (1L<<27)
#define Py_TPFLAGS_UNICODE_SUBCLASS (1L<<28)
#define Py_TPFLAGS_DICT_SUBCLASS (1L<<29)
#define Py_TPFLAGS_BASE_EXC_SUBCLASS (1L<<30)
#define Py_TPFLAGS_TYPE_SUBCLASS (1L<<31)
#define Py_TPFLAGS_DEFAULT ( \
Py_TPFLAGS_HAVE_STACKLESS_EXTENSION | \
0)
#define PyType_HasFeature(t,f) (((t)->tp_flags & (f)) != 0)
Merged revisions 53875-53911 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r53899 | neal.norwitz | 2007-02-25 16:52:27 +0100 (Sun, 25 Feb 2007) | 1 line Add more details when releasing interned strings ........ r53900 | neal.norwitz | 2007-02-25 16:53:36 +0100 (Sun, 25 Feb 2007) | 1 line Whitespace only changes ........ r53901 | jeremy.hylton | 2007-02-25 16:57:45 +0100 (Sun, 25 Feb 2007) | 8 lines Fix crash in exec when unicode filename can't be decoded. I can't think of an easy way to test this behavior. It only occurs when the file system default encoding and the interpreter default encoding are different, such that you can open the file but not decode its name. ........ r53902 | jeremy.hylton | 2007-02-25 17:01:58 +0100 (Sun, 25 Feb 2007) | 2 lines Put declarations before code. ........ r53910 | fred.drake | 2007-02-25 18:56:27 +0100 (Sun, 25 Feb 2007) | 3 lines - SF patch #1657613: add documentation for the Element interface - clean up bogus use of the {datadescni} environment everywhere ........ r53911 | neal.norwitz | 2007-02-25 20:44:48 +0100 (Sun, 25 Feb 2007) | 17 lines Variation of patch # 1624059 to speed up checking if an object is a subclass of some of the common builtin types. Use a bit in tp_flags for each common builtin type. Check the bit to determine if any instance is a subclass of these common types. The check avoids a function call and O(n) search of the base classes. The check is done in the various Py*_Check macros rather than calling PyType_IsSubtype(). All the bits are set in tp_flags when the type is declared in the Objects/*object.c files because PyType_Ready() is not called for all the types. Should PyType_Ready() be called for all types? If so and the change is made, the changes to the Objects/*object.c files can be reverted (remove setting the tp_flags). Objects/typeobject.c would also have to be modified to add conditions for Py*_CheckExact() in addition to each the PyType_IsSubtype check. ........
2007-02-25 16:39:11 -04:00
#define PyType_FastSubclass(t,f) PyType_HasFeature(t,f)
1990-10-14 09:07:46 -03:00
/*
The macros Py_INCREF(op) and Py_DECREF(op) are used to increment or decrement
reference counts. Py_DECREF calls the object's deallocator function when
the refcount falls to 0; for
1990-10-14 09:07:46 -03:00
objects that don't contain references to other objects or heap memory
this can be the standard function free(). Both macros can be used
wherever a void expression is allowed. The argument must not be a
NIL pointer. If it may be NIL, use Py_XINCREF/Py_XDECREF instead.
The macro _Py_NewReference(op) initialize reference counts to 1, and
in special builds (Py_REF_DEBUG, Py_TRACE_REFS) performs additional
bookkeeping appropriate to the special build.
1990-10-14 09:07:46 -03:00
We assume that the reference count field can never overflow; this can
be proven when the size of the field is the same as the pointer size, so
we ignore the possibility. Provided a C int is at least 32 bits (which
is implicitly assumed in many parts of this code), that's enough for
about 2**31 references to an object.
XXX The following became out of date in Python 2.2, but I'm not sure
XXX what the full truth is now. Certainly, heap-allocated type objects
XXX can and should be deallocated.
1990-10-14 09:07:46 -03:00
Type objects should never be deallocated; the type pointer in an object
is not considered to be a reference to the type object, to save
complications in the deallocation function. (This is actually a
decision that's up to the implementer of each new type so if you want,
you can count such references to the type object.)
*** WARNING*** The Py_DECREF macro must have a side-effect-free argument
1990-10-14 09:07:46 -03:00
since it may evaluate its argument multiple times. (The alternative
would be to mace it a proper function or assign it to a global temporary
variable first, both of which are slower; and in a multi-threaded
environment the global variable trick is not safe.)
*/
/* First define a pile of simple helper macros, one set per special
* build symbol. These either expand to the obvious things, or to
* nothing at all when the special mode isn't in effect. The main
* macros can later be defined just once then, yet expand to different
* things depending on which special build options are and aren't in effect.
* Trust me <wink>: while painful, this is 20x easier to understand than,
* e.g, defining _Py_NewReference five different times in a maze of nested
* #ifdefs (we used to do that -- it was impenetrable).
*/
#ifdef Py_REF_DEBUG
PyAPI_DATA(Py_ssize_t) _Py_RefTotal;
PyAPI_FUNC(void) _Py_NegativeRefcount(const char *fname,
int lineno, PyObject *op);
PyAPI_FUNC(PyObject *) _PyDict_Dummy(void);
PyAPI_FUNC(PyObject *) _PySet_Dummy(void);
PyAPI_FUNC(Py_ssize_t) _Py_GetRefTotal(void);
#define _Py_INC_REFTOTAL _Py_RefTotal++
#define _Py_DEC_REFTOTAL _Py_RefTotal--
#define _Py_REF_DEBUG_COMMA ,
#define _Py_CHECK_REFCNT(OP) \
{ if ((OP)->ob_refcnt < 0) \
_Py_NegativeRefcount(__FILE__, __LINE__, \
(PyObject *)(OP)); \
}
#else
#define _Py_INC_REFTOTAL
#define _Py_DEC_REFTOTAL
#define _Py_REF_DEBUG_COMMA
#define _Py_CHECK_REFCNT(OP) /* a semicolon */;
#endif /* Py_REF_DEBUG */
#ifdef COUNT_ALLOCS
PyAPI_FUNC(void) inc_count(PyTypeObject *);
PyAPI_FUNC(void) dec_count(PyTypeObject *);
#define _Py_INC_TPALLOCS(OP) inc_count((OP)->ob_type)
#define _Py_INC_TPFREES(OP) dec_count((OP)->ob_type)
#define _Py_DEC_TPFREES(OP) (OP)->ob_type->tp_frees--
#define _Py_COUNT_ALLOCS_COMMA ,
#else
#define _Py_INC_TPALLOCS(OP)
#define _Py_INC_TPFREES(OP)
#define _Py_DEC_TPFREES(OP)
#define _Py_COUNT_ALLOCS_COMMA
#endif /* COUNT_ALLOCS */
1990-10-14 09:07:46 -03:00
#ifdef Py_TRACE_REFS
/* Py_TRACE_REFS is such major surgery that we call external routines. */
PyAPI_FUNC(void) _Py_NewReference(PyObject *);
PyAPI_FUNC(void) _Py_ForgetReference(PyObject *);
PyAPI_FUNC(void) _Py_Dealloc(PyObject *);
PyAPI_FUNC(void) _Py_PrintReferences(FILE *);
PyAPI_FUNC(void) _Py_PrintReferenceAddresses(FILE *);
PyAPI_FUNC(void) _Py_AddToAllObjects(PyObject *, int force);
1990-10-14 09:07:46 -03:00
#else
/* Without Py_TRACE_REFS, there's little enough to do that we expand code
* inline.
*/
#define _Py_NewReference(op) ( \
_Py_INC_TPALLOCS(op) _Py_COUNT_ALLOCS_COMMA \
_Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
(op)->ob_refcnt = 1)
#define _Py_ForgetReference(op) _Py_INC_TPFREES(op)
#define _Py_Dealloc(op) ( \
_Py_INC_TPFREES(op) _Py_COUNT_ALLOCS_COMMA \
(*(op)->ob_type->tp_dealloc)((PyObject *)(op)))
#endif /* !Py_TRACE_REFS */
#define Py_INCREF(op) ( \
_Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
(op)->ob_refcnt++)
#define Py_DECREF(op) \
if (_Py_DEC_REFTOTAL _Py_REF_DEBUG_COMMA \
--(op)->ob_refcnt != 0) \
_Py_CHECK_REFCNT(op) \
else \
_Py_Dealloc((PyObject *)(op))
1990-10-14 09:07:46 -03:00
/* Safely decref `op` and set `op` to NULL, especially useful in tp_clear
* and tp_dealloc implementatons.
*
* Note that "the obvious" code can be deadly:
*
* Py_XDECREF(op);
* op = NULL;
*
* Typically, `op` is something like self->containee, and `self` is done
* using its `containee` member. In the code sequence above, suppose
* `containee` is non-NULL with a refcount of 1. Its refcount falls to
* 0 on the first line, which can trigger an arbitrary amount of code,
* possibly including finalizers (like __del__ methods or weakref callbacks)
* coded in Python, which in turn can release the GIL and allow other threads
* to run, etc. Such code may even invoke methods of `self` again, or cause
* cyclic gc to trigger, but-- oops! --self->containee still points to the
* object being torn down, and it may be in an insane state while being torn
* down. This has in fact been a rich historic source of miserable (rare &
* hard-to-diagnose) segfaulting (and other) bugs.
*
* The safe way is:
*
* Py_CLEAR(op);
*
* That arranges to set `op` to NULL _before_ decref'ing, so that any code
* triggered as a side-effect of `op` getting torn down no longer believes
* `op` points to a valid object.
*
* There are cases where it's safe to use the naive code, but they're brittle.
* For example, if `op` points to a Python integer, you know that destroying
* one of those can't cause problems -- but in part that relies on that
* Python integers aren't currently weakly referencable. Best practice is
* to use Py_CLEAR() even if you can't think of a reason for why you need to.
*/
#define Py_CLEAR(op) \
do { \
if (op) { \
PyObject *tmp = (PyObject *)(op); \
(op) = NULL; \
Py_DECREF(tmp); \
} \
} while (0)
1990-12-20 11:06:42 -04:00
/* Macros to use in case the object pointer may be NULL: */
#define Py_XINCREF(op) if ((op) == NULL) ; else Py_INCREF(op)
#define Py_XDECREF(op) if ((op) == NULL) ; else Py_DECREF(op)
1990-10-14 09:07:46 -03:00
/*
These are provided as conveniences to Python runtime embedders, so that
they can have object code that is not dependent on Python compilation flags.
*/
PyAPI_FUNC(void) Py_IncRef(PyObject *);
PyAPI_FUNC(void) Py_DecRef(PyObject *);
1990-10-14 09:07:46 -03:00
/*
_Py_NoneStruct is an object of undefined type which can be used in contexts
1990-10-14 09:07:46 -03:00
where NULL (nil) is not suitable (since NULL often means 'error').
Don't forget to apply Py_INCREF() when returning this value!!!
1990-10-14 09:07:46 -03:00
*/
PyAPI_DATA(PyObject) _Py_NoneStruct; /* Don't use this directly */
#define Py_None (&_Py_NoneStruct)
1990-10-14 09:07:46 -03:00
/* Macro for returning Py_None from a function */
#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
/*
Py_NotImplemented is a singleton used to signal that an operation is
not implemented for a given type combination.
*/
PyAPI_DATA(PyObject) _Py_NotImplementedStruct; /* Don't use this directly */
#define Py_NotImplemented (&_Py_NotImplementedStruct)
1990-10-14 09:07:46 -03:00
/* Rich comparison opcodes */
#define Py_LT 0
#define Py_LE 1
#define Py_EQ 2
#define Py_NE 3
#define Py_GT 4
#define Py_GE 5
/* Maps Py_LT to Py_GT, ..., Py_GE to Py_LE.
* Defined in object.c.
*/
PyAPI_DATA(int) _Py_SwappedOp[];
1990-10-14 09:07:46 -03:00
/*
More conventions
================
Argument Checking
-----------------
Functions that take objects as arguments normally don't check for nil
arguments, but they do check the type of the argument, and return an
error if the function doesn't apply to the type.
Failure Modes
-------------
Functions may fail for a variety of reasons, including running out of
1990-12-20 11:06:42 -04:00
memory. This is communicated to the caller in two ways: an error string
is set (see errors.h), and the function result differs: functions that
normally return a pointer return NULL for failure, functions returning
an integer return -1 (which could be a legal return value too!), and
other functions return 0 for success and -1 for failure.
Callers should always check for errors before using the result. If
an error was set, the caller must either explicitly clear it, or pass
the error on to its caller.
1990-10-14 09:07:46 -03:00
Reference Counts
----------------
It takes a while to get used to the proper usage of reference counts.
Functions that create an object set the reference count to 1; such new
objects must be stored somewhere or destroyed again with Py_DECREF().
Some functions that 'store' objects, such as PyTuple_SetItem() and
PyList_SetItem(),
1990-10-14 09:07:46 -03:00
don't increment the reference count of the object, since the most
frequent use is to store a fresh object. Functions that 'retrieve'
objects, such as PyTuple_GetItem() and PyDict_GetItemString(), also
don't increment
1990-10-14 09:07:46 -03:00
the reference count, since most frequently the object is only looked at
quickly. Thus, to retrieve an object and store it again, the caller
must call Py_INCREF() explicitly.
1990-10-14 09:07:46 -03:00
NOTE: functions that 'consume' a reference count, like
PyList_SetItem(), consume the reference even if the object wasn't
successfully stored, to simplify error handling.
1990-10-14 09:07:46 -03:00
It seems attractive to make other functions that take an object as
argument consume a reference count; however, this may quickly get
1990-10-14 09:07:46 -03:00
confusing (even the current practice is already confusing). Consider
it carefully, it may save lots of calls to Py_INCREF() and Py_DECREF() at
1990-10-14 09:07:46 -03:00
times.
*/
/* Trashcan mechanism, thanks to Christian Tismer.
When deallocating a container object, it's possible to trigger an unbounded
chain of deallocations, as each Py_DECREF in turn drops the refcount on "the
next" object in the chain to 0. This can easily lead to stack faults, and
especially in threads (which typically have less stack space to work with).
A container object that participates in cyclic gc can avoid this by
bracketing the body of its tp_dealloc function with a pair of macros:
static void
mytype_dealloc(mytype *p)
{
... declarations go here ...
PyObject_GC_UnTrack(p); // must untrack first
Py_TRASHCAN_SAFE_BEGIN(p)
... The body of the deallocator goes here, including all calls ...
... to Py_DECREF on contained objects. ...
Py_TRASHCAN_SAFE_END(p)
}
CAUTION: Never return from the middle of the body! If the body needs to
"get out early", put a label immediately before the Py_TRASHCAN_SAFE_END
call, and goto it. Else the call-depth counter (see below) will stay
above 0 forever, and the trashcan will never get emptied.
How it works: The BEGIN macro increments a call-depth counter. So long
as this counter is small, the body of the deallocator is run directly without
further ado. But if the counter gets large, it instead adds p to a list of
objects to be deallocated later, skips the body of the deallocator, and
resumes execution after the END macro. The tp_dealloc routine then returns
without deallocating anything (and so unbounded call-stack depth is avoided).
When the call stack finishes unwinding again, code generated by the END macro
notices this, and calls another routine to deallocate all the objects that
may have been added to the list of deferred deallocations. In effect, a
chain of N deallocations is broken into N / PyTrash_UNWIND_LEVEL pieces,
with the call stack never exceeding a depth of PyTrash_UNWIND_LEVEL.
*/
PyAPI_FUNC(void) _PyTrash_deposit_object(PyObject*);
PyAPI_FUNC(void) _PyTrash_destroy_chain(void);
PyAPI_DATA(int) _PyTrash_delete_nesting;
PyAPI_DATA(PyObject *) _PyTrash_delete_later;
#define PyTrash_UNWIND_LEVEL 50
#define Py_TRASHCAN_SAFE_BEGIN(op) \
if (_PyTrash_delete_nesting < PyTrash_UNWIND_LEVEL) { \
++_PyTrash_delete_nesting;
/* The body of the deallocator is here. */
#define Py_TRASHCAN_SAFE_END(op) \
--_PyTrash_delete_nesting; \
if (_PyTrash_delete_later && _PyTrash_delete_nesting <= 0) \
_PyTrash_destroy_chain(); \
} \
else \
_PyTrash_deposit_object((PyObject*)op);
#ifdef __cplusplus
}
#endif
#endif /* !Py_OBJECT_H */