Optimize `asyncio.all_tasks()` for the common case where the event loop is running in the current thread by avoiding stop-the-world pauses and locking.
This optimization is already present for `asyncio.current_task()` so we do the same for `asyncio.all_tasks()`.
* Set stx_mode to None if STATX_TYPE|STATX_MODE is missing from
stx_mask.
* Enhance os.statx() tests.
* statx_result structure: remove atime_sec, btime_sec, ctime_sec and
mtime_sec members. Compute them on demand when stx_atime,
stx_btime, stx_ctime and stx_mtime are read.
* Doc: fix statx members sorting.
* gh-140443:use fma in loghelper to improve accuracy of log for very large integers
Use fused multiply-add in log_helper() for huge ints.
Saving a rounding here is remarkably effective. Across some millions
of randomized test cases with ints up to a billion bits, on Windows
and using log10, the ULP error distribution was dramatically
flattened, and its range was nearly cut in half. In fact, the largest
error Tim saw was under 0.6 ULP.
---------
Co-authored-by: abhi210 <27881020+Abhi210@users.noreply.github.com>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
The `make_gen()` function creates and tracks generator/coro objects, but
doesn't fully initialize all the fields. At a minimum, we need to
initialize all the fields that may be accessed by gen_traverse because
the call to `compute_cr_origin()` can trigger a GC.
While looking at #140028, I found some unrelated test regressions in the
3.14 cycle. These seem to all come from #130317. From what I can tell,
that made Python more correct than it was before. According to [0], HP PA
RISC uses 1 for SNaN and thus a 0 for QNaN.
[0]: https://grouper.ieee.org/groups/1788/email/msg03272.html
Currently, there are a few places where tp_mro could theoretically
become NULL, but do not in practice. This commit adds defensive checks for
NULL values to ensure that any changes do not introduce a crash and that
state invariants are upheld.
The assertions added in this commit are all instances where a NULL value would get passed to something not expecting a NULL, so it is better to catch an assertion failure than crash later on.
There are a few cases where it is OK for the return of lookup_tp_mro to be NULL, such as when passed to is_subtype_with_mro, which handles this explicitly.
Some systems have the definitions of the mask bits without having the
corresponding members in struct statx. Add configure checks for members
added after Linux 4.11 (when statx itself was added).
