Gevent

====================


Features
--------

- Update autoconf files for Apple Silicon Macs. Note that while there
are reports of compiling gevent on Apple Silicon Macs now, this is
*not* a tested configuration. There may be some remaining issues with
CFFI on some systems as well.
See :issue:`1721`.
- Build and upload CPython 3.10 binary manylinux wheels.

Unfortunately, this required us to stop building and uploading CPython
2.7 binary manylinux wheels. Binary wheels for 2.7 continue to be
available for Windows and macOS.
See :issue:`1822`.
- Test and distribute musllinux_1_1 wheels.
See :issue:`1837`.
- Update the tested versions of PyPy2 and PyPy3. For PyPy2, there should
be no user visible changes, but for PyPy3, support has moved from
Python 3.6 to Python 3.7.
See :issue:`1843`.


Bugfixes
--------

- Try to avoid linking to two different Python runtime DLLs on Windows.
See :issue:`1814`.
- Stop compiling manylinux wheels with ``-ffast-math.`` This was
implicit in ``-Ofast``, but could alter the global state of the
process. Analysis and fix thanks to Ilya Konstantinov.
See :issue:`1820`.
- Fix hanging the interpreter on shutdown if gevent monkey patching
occurred on a non-main thread in Python 3.9.8 and above. (Note that
this is not a recommended practice.)
See :issue:`1839`.


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===================


Features
--------

- Update the embedded c-ares from 1.16.1 to 1.17.1.
See :issue:`1758`.
- Add support for Python 3.10rc1 and newer.

As part of this, the minimum required greenlet version was increased
to 1.1.0 (on CPython), and the minimum version of Cython needed to
build gevent from a source checkout is 3.0a9.

Note that the dnspython resolver is not available on Python 3.10.
See :issue:`1790`.
- Update from Cython 3.0a6 to 3.0a9.
See :issue:`1801`.


Misc
----

- See :issue:`1789`.


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===================


Features
--------

- Update the embedded libev from 4.31 to 4.33.
See :issue:`1754`.
- Update the embedded libuv from 1.38.0 to 1.40.0.
See :issue:`1755`.


Misc
----

- See :issue:`1753`.


----

===================

Bugfixes
--------

Fix a ``TypeError`` on startup on Python 2 with ``zope.schema``
installed. Reported by Josh Zuech.

===================

Bugfixes
--------

- Make gevent ``FileObjects`` more closely match the semantics of native
file objects for the ``name`` attribute:

- Objects opened from a file descriptor integer have that integer as
their ``name.`` (Note that this is the Python 3 semantics; Python 2
native file objects returned from ``os.fdopen()`` have the string
"<fdopen>" as their name , but here gevent always follows Python 3.)
- The ``name`` remains accessible after the file object is closed.

Thanks to Dan Milon.
See :issue:`1745`.


Misc
----

Make ``gevent.event.AsyncResult`` print a warning when it detects improper
cross-thread usage instead of hanging.

``AsyncResult`` has *never* been safe to use from multiple threads.
It, like most gevent objects, is intended to work with greenlets from
a single thread. Using ``AsyncResult`` from multiple threads has
undefined semantics. The safest way to communicate between threads is
using an event loop async watcher.

Those undefined semantics changed in recent gevent versions, making it
more likely that an abused ``AsyncResult`` would misbehave in ways
that could cause the program to hang.

Now, when ``AsyncResult`` detects a situation that would hang, it
prints a warning to stderr. Note that this is best-effort, and hangs
are still possible, especially under PyPy 7.3.3.

At the same time, ``AsyncResult`` is tuned to behave more like it did
in older versions, meaning that the hang is once again much less
likely. If you were getting lucky and using ``AsyncResult``
successfully across threads, this may restore your luck. In addition,
cross-thread wakeups are faster. Note that the gevent hub now uses an
extra file descriptor to implement this.

Similar changes apply to ``gevent.event.Event`` (see :issue:`1735`).

See :issue:`1739`.


----

====================


Features
--------

- Make :class:`gevent.Greenlet` objects function as context managers.
When the ``with`` suite finishes, execution doesn't continue until the
greenlet is finished. This can be a simpler alternative to a
:class:`gevent.pool.Group` when the lifetime of greenlets can be
lexically scoped.

Suggested by André Caron.
See :issue:`1324`.


Bugfixes
--------

- Make gevent's ``Semaphore`` objects properly handle native thread
identifiers larger than can be stored in a C ``long`` on Python 3,
instead of raising an ``OverflowError``.

Reported by TheYOSH.
See :issue:`1733`.


----