_Py_hashtable_get_entry_ptr() avoids comparing the entry hash:
compare directly keys.
Move _Py_hashtable_get_entry_ptr() just after
_Py_hashtable_get_entry_generic().
_Py_hashtable_t values become regular "void *" pointers.
* Add _Py_hashtable_entry_t.data member
* Remove _Py_hashtable_t.data_size member
* Remove _Py_hashtable_t.get_func member. It is no longer needed
to specialize _Py_hashtable_get() for a specific value size, since
all entries now have the same size (void*).
* Remove the following macros:
* _Py_HASHTABLE_GET()
* _Py_HASHTABLE_SET()
* _Py_HASHTABLE_SET_NODATA()
* _Py_HASHTABLE_POP()
* Rename _Py_hashtable_pop() to _Py_hashtable_steal()
* _Py_hashtable_foreach() callback now gets key and value rather than
entry.
* Remove _Py_hashtable_value_destroy_func type. value_destroy_func
callback now only has a single parameter: data (void*).
Rewrite _tracemalloc to store "trace_t*" rather than directly
"trace_t" in traces hash tables. Traces are now allocated on the heap
memory, outside the hash table.
Add tracemalloc_copy_traces() and tracemalloc_copy_domains() helper
functions.
Remove _Py_hashtable_copy() function since there is no API to copy a
key or a value.
Remove also _Py_hashtable_delete() function which was commented.
Rewrite _Py_hashtable_t type to always store the key as
a "const void *" pointer. Add an explicit "key" member to
_Py_hashtable_entry_t.
Remove _Py_hashtable_t.key_size member.
hash and compare functions drop their hash table parameter, and their
'key' parameter type becomes "const void *".
Rewrite how the _tracemalloc module stores traces of other domains.
Rather than storing the domain inside the key, it now uses a new hash
table with the domain as the key, and the data is a per-domain traces
hash table.
* Add tracemalloc_domain hash table.
* Remove _Py_tracemalloc_config.use_domain.
* Remove pointer_t and related functions.
Add a new _Py_HashPointerRaw() function which avoids replacing -1
with -2 to micro-optimize hash table using pointer keys: using
_Py_hashtable_hash_ptr() hash function.
Optimize _Py_hashtable_get() and _Py_hashtable_get_entry() for
pointer keys:
* key_size == sizeof(void*)
* hash_func == _Py_hashtable_hash_ptr
* compare_func == _Py_hashtable_compare_direct
Changes:
* Add get_func and get_entry_func members to _Py_hashtable_t
* Convert _Py_hashtable_get() and _Py_hashtable_get_entry() functions
to static nline functions.
* Add specialized get and get entry for pointer keys.
In translate(), generate unique group names across calls.
The restores the undocumented ability to get a valid regexp
by joining multiple translate() results via `|`.
_Py_hashtable_new() now uses PyMem_Malloc/PyMem_Free allocator by
default, rather than PyMem_RawMalloc/PyMem_RawFree.
PyMem_Malloc is faster than PyMem_RawMalloc for memory blocks smaller
than or equal to 512 bytes.
* Move Modules/hashtable.h to Include/internal/pycore_hashtable.h
* Move Modules/hashtable.c to Python/hashtable.c
* Python is now linked to hashtable.c. _tracemalloc is no longer
linked to hashtable.c. Previously, marshal.c got hashtable.c via
_tracemalloc.c which is built as a builtin module.
Avoid unnecessary overhead in _PyDict_GetItemIdWithError() by calling
_PyDict_GetItem_KnownHash() instead of the more generic PyDict_GetItemWithError(),
since we already know the hash of interned strings.
With the new parser, the error message contains always the trailing
newlines, causing the comparison of the repr of the error messages
in codeop to fail. This commit makes the new parser mirror the old parser's
behaviour regarding trailing newlines.
* bpo-37986: Improve perfomance of PyLong_FromDouble()
* Use strict bound check for safety and symmetry
* Remove possibly outdated performance claims
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
Convert posixmodule.c ("posix" or "nt" module) to the multiphase
initialization (PEP 489).
* Create the module using PyModuleDef_Init().
* Create ScandirIteratorType and DirEntryType with the new
PyType_FromModuleAndSpec() (PEP 573)
* Get the module state from ScandirIteratorType and DirEntryType with
the new PyType_GetModule() (PEP 573)
* Pass module to functions which access the module state.
* convert_sched_param() gets a new module parameter. It is now called
directly since Argument Clinic doesn't support passing the module
to an argument converter callback.
* Remove _posixstate_global macro.
This is for the C generator:
- Disallow rule and variable names starting with `_`
- Rename most local variable names generated by the parser to start with `_`
Exceptions:
- Renaming `p` to `_p` will be a separate PR
- There are still some names that might clash, e.g.
- anything starting with `Py`
- C reserved words (`if` etc.)
- Macros like `EXTRA` and `CHECK`
* bpo-39791: Update importlib.resources to support files() API (importlib_resources 1.5).
* 📜🤖 Added by blurb_it.
* Add some documentation about the new objects added.
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Always run GitHub action jobs, even on documentation-only pull
requests. So it will be possible to make a GitHub action job, like
the Windows (64-bit) job, mandatory.
(Note: PEP 554 is not accepted and the implementation in the code base is a private one for use in the test suite.)
If code running in a subinterpreter raises an uncaught exception then the "run" call in the calling interpreter fails. A RunFailedError is raised there that summarizes the original exception as a string. The actual exception type, __cause__, __context__, state, etc. are all discarded. This turned out to be functionally insufficient in practice. There is a more helpful solution (and PEP 554 has been updated appropriately).
This change adds the exception propagation behavior described in PEP 554 to the _xxsubinterpreters module. With this change a copy of the original exception is set to __cause__ on the RunFailedError. For now we are using "pickle", which preserves the exception's state. We also preserve the original __cause__, __context__, and __traceback__ (since "pickle" does not preserve those).
https://bugs.python.org/issue32604
Declare _PyErr_GetTopmostException() with PyAPI_FUNC() to properly
export the function in the C API. The function remains private
("_Py") prefix.
Co-Authored-By: Julien Danjou <julien@danjou.info>
jack1142
Dong-hee Na
Tzanetos Balitsaris
Victor Stinner
Allen Guo
Steve Dower
scoder
Serhiy Storchaka
Batuhan Taskaya
Tim Peters
Raymond Hettinger
Shantanu
Hai Shi
Brad Solomon
Inada Naoki
Pablo Galindo
Sergey Fedoseev
Andre Delfino
Jason R. Coombs
Joannah Nanjekye
Ned Batchelder
Chris Jerdonek
Zackery Spytz
Eric Snow