* Make ``gevent.select.select`` accept arbitrary iterables, not
just sequences. That is, you can now pass in a generator of file
descriptors instead of a realized list. Internally, arbitrary
iterables are copied into lists. This better matches what the
standard library does.
* On Python 3.11 and newer, opt out of Cython's fast exception
manipulation, which *may* be causing problems in certain
circumstances when combined with greenlets.
* On all versions of Python, adjust some error handling in the
default * -based loop. This fixes several assertion failures
on debug versions of CPython. Hopefully it has a positive
impact under real conditions.
* Make ``gevent.pywsgi`` comply more closely with the HTTP
specification for chunked transfer encoding. In particular,
we are much stricter about trailers, and trailers that are
invalid (too long or featuring disallowed characters) forcibly
close the connection to the client *after* the results have
been sent.
* Trailers otherwise continue to be ignored and are not
available to the WSGI application.
Previously, carefully crafted invalid trailers in chunked
requests on keep-alive connections might appear as two
requests to ``gevent.pywsgi``. Because this was handled
exactly as a normal keep-alive connection with two requests,
the WSGI application should handle it normally. However, if
you were counting on some upstream server to filter incoming
requests based on paths or header fields, and the upstream
server simply passed trailers through without
validating them, then this embedded second request would
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=99
* Add preliminary support for Python 3.12, using greenlet
3.0a1.
* Update the bundled c-ares version to 1.19.1.
* Fix an edge case connecting a non-blocking ``SSLSocket`` that
could result in an AttributeError. In a change to match
the standard library, calling ``sock.connect_ex()`` on a
subclass of ``socket`` no longer calls the subclass's
``connect`` method.
* Make gevent's ``FileObjectThread`` (mostly used on Windows)
implement ``readinto`` cooperatively.
* Work around an ``AttributeError`` during cyclic garbage
collection when Python finalizers (``__del__`` and the like)
attempt to use gevent APIs. This is not a recommended practice,
and it is unclear if catching this ``AttributeError`` will fix
any problems or just shift them.
* Remove support for obsolete Python versions. This is
everything prior to 3.8.
* Stop using ``pkg_resources`` to find entry points (plugins).
Instead, use ``importlib.metadata``.
* Honor ``sys.unraisablehook`` when a callback function
produces an exception, and handling the exception in the hub
*also* produces an exception.
- drop skip-tests-in-leap.patch handle-python-ssl-changes.patch (obsolete)
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=97
* Update to greenlet 2.0. This fixes a deallocation issue that
required a change in greenlet's ABI. The design of greenlet 2.0 is
intended to prevent future fixes and enhancements from
requiring an ABI change, making it easier to update gevent
and greenlet independently.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=88
- Update to 22.10.2
* Update to greenlet 2.0. This fixes a deallocation issue that
required a change in greenlet's ABI. The design of greenlet 2.0
is intended to prevent future fixes and enhancements from
requiring an ABI change, making it easier to update gevent and
greenlet independently.
* Caution: greenlet 2.0 requires a modern-ish C++ compiler. This
may mean certain older platforms are no longer supported. See
:issue:`1909`.
OBS-URL: https://build.opensuse.org/request/show/1056058
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=81
* Update bundled libuv to 1.44.2.
See :issue:`1913`.
* Upgrade embedded c-ares to 1.18.1.
* Upgrade bundled libuv to 1.42.0 from 1.40.0.
* Added preliminary support for Python 3.11 (rc2 and later).
Some platforms may or may not have binary wheels at this time.
.. important:: Support for legacy versions of Python, including 2.7
and 3.6, will be ending soon. The
maintenance burden has become too great and the
maintainer's time is too limited.
Ideally, there will be a release of gevent compatible
with a final release of greenlet 2.0 that still
supports those legacy versions, but that may not be
possible; this may be the final release to support them.
:class:`gevent.threadpool.ThreadPool` can now optionally expire idle
threads. This is used by default in the implicit thread pool used for
DNS requests and other user-submitted tasks; other uses of a
thread-pool need to opt-in to this.
See :issue:`1867`.
* Truly disable the effects of compiling with ``-ffast-math``.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=79
- Update to 21.12.0
* 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`.
* 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`.
- Meanwhile Cython 0.29.24 and dnspython are compatible
with python310
- Revert threading test skip, fixed in 21.12
OBS-URL: https://build.opensuse.org/request/show/940355
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=78
- Relax the crypto policies for the test-suite
- Update to 21.1.2:
* Features:
- Update the embedded libev from 4.31 to 4.33.
- Update the embedded libuv from 1.38.0 to 1.40.0.
- Update to 21.1.1:
* Bugfixes:
- Fix a TypeError on startup on Python 2 with zope.schema
installed.
- Update to 21.1.0:
* 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.
* 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
OBS-URL: https://build.opensuse.org/request/show/871401
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=74
* Make worker threads created by :class:`gevent.threadpool.ThreadPool` install
the :func:`threading.setprofile` and :func:`threading.settrace` hooks
while tasks are running. This provides visibility to profiling and
tracing tools like yappi.
* Incorrectly passing an exception *instance* instead of an exception
*type* to `gevent.Greenlet.kill` or `gevent.killall` no longer prints
an exception to stderr.
* Make destroying a hub try harder to more forcibly stop loop processing
when there are outstanding callbacks or IO operations scheduled.
* Improve the ability to use monkey-patched locks, and
`gevent.lock.BoundedSemaphore`, across threads, especially when the
various threads might not have a gevent hub or any other active
greenlets. In particular, this handles some cases that previously
raised ``LoopExit`` or would hang. Note that this may not be reliable
on PyPy on Windows; such an environment is not currently recommended.
* Make error reporting when a greenlet suffers a `RecursionError` more
reliable.
* gevent.pywsgi: Avoid printing an extra traceback ("TypeError: not
enough arguments for format string") to standard error on certain
invalid client requests.
* Add support for PyPy2 7.3.3.
* Python 2: Make ``gevent.subprocess.Popen.stdin`` objects have a
``write`` method that guarantees to write the entire argument in
binary, unbuffered mode. This may require multiple trips around the
event loop, but more closely matches the behaviour of the Python 2
standard library (and gevent prior to 1.5). The number of bytes
written is still returned (instead of ``None``).
See :issue:`1711`.
* Make `gevent.pywsgi` stop trying to enforce the rules for reading chunked input or
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=73
This is a requirement for the python-greenlet update to 0.4.17 with Python >= 3.7
https://github.com/python-greenlet/greenlet/issues/178
- Update to version 20.9.0 (2020-09-22)
+ Features
* The embedded libev is now asked to detect the availability of
clock_gettime and use the realtime and/or monotonic clocks,
if they are available.
* On Linux, this can reduce the number of system calls libev
makes. Originally provided by Josh Snyder. See
:issue:`issue1648`.
+ Bugfixes
* On CPython, depend on greenlet >= 0.4.17. This version is
binary incompatible with earlier releases on CPython 3.7 and
later.
* On Python 3.7 and above, the module gevent.contextvars is no
longer monkey-patched into the standard library. contextvars
are now both greenlet and asyncio task local. See
:issue:`1656`. See :issue:`issue1674`.
* The DummyThread objects created automatically by certain
operations when the standard library threading module is
monkey-patched now match the naming convention the standard
library uses ("Dummy-12345"). Previously (since gevent 1.2a2)
they used "DummyThread-12345". See :issue:`1659`.
* Fix compatibility with dnspython 2.
* Caution!
* This currently means that it can be imported. But it cannot
yet be used. gevent has a pinned dependency on dnspython < 2
for now.
* See :issue:`1661`.
- Update to version 20.6.2 (2020-06-16)
+ Features
* It is now possible to build and use the embedded libuv on a
OBS-URL: https://build.opensuse.org/request/show/839650
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=67
- The file objects (FileObjectPosix, FileObjectThread) now
consistently text and binary modes. If neither 'b' nor 't' is
given in the mode, they will read and write native strings.
If 't' is given, they will always work with unicode strings,
and 'b' will always work with byte strings. (FileObjectPosix
already worked this way.) See :issue:`1441`.
- The file objects accept encoding, errors and newline
arguments. On Python 2, these are only used if 't' is in the
mode.
- The default mode for FileObjectPosix changed from rb to
simply r, for consistency with the other file objects and the
standard open and io.open functions.
- Fix FileObjectPosix improperly being used from multiple
greenlets. Previously this was hidden by forcing buffering,
which raised RuntimeError.
- Fix using monkey-patched threading.Lock and threading.RLock
objects as spin locks by making them call sleep(0) if they
failed to acquire the lock in a non-blocking call. This lets
other callbacks run to release the lock, simulating
preemptive threading. Using spin locks is not recommended,
but may have been done in code written for threads,
especially on Python 3. See :issue:`1464`.
- Fix Semaphore (and monkey-patched threading locks) to be
fair. This eliminates the rare potential for starvation of
greenlets. As part of this change, the low-level method
rawlink of Semaphore, Event, and AsyncResult now always
remove the link object when calling it, so unlink can
sometimes be optimized out. See :issue:`1487`.
- Make gevent.pywsgi support Connection: keep-alive in
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=61
- Add patches to fix building the package:
* remove-testCongestion.patch to remove a test that is failing
due to a timeout
* fix-tests.patch to fix some tests
- ssl.OP_NO_COMPRESSION is set by default by ssl.
- thread_ident can be represented as a negative hex number now,
so replace the negative sign with the regex too, and not just the number.
* use-libev-cffi.patch, libev-cext seems to be broken on i586, so
use libev-cffi by default (also, the gevent documentation mentions
that upstream will make libev-cffi the default soon).
OBS-URL: https://build.opensuse.org/request/show/671192
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=52
* generate with cython 0.29
* Refactored the gevent test runner and test suite to make them more reusable. In particular, the tests are now run with python -m gevent.tests. See issue #1293.
* Formatting run info no longer includes gevent.local.local objects that have no value in the greenlet. See issue #1275.
* Fixed negative length in pywsgi’s Input read functions for non chunked body. Reported in issue #1274 by tzickel.
* Fix opening files in text mode in CPython 2 on Windows by patching libuv. See issue #1282 reported by wiggin15.
* gevent now depends on greenlet 0.4.14 or above.
* gevent.local.local subclasses correctly supports @staticmethod functions. Reported by Brendan Powers in issue #1266.
- Do NOT bundle c-ares and libev
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=47
- Update to 1.3.5
* Update the bundled libuv from 1.20.1 to 1.22.0.
* Test Python 3.7 on Appveyor. Fix the handling of Popen's
``close_fds`` argument on 3.7.
* Update Python versions tested on Travis, including PyPy to 6.0. See :issue:`1195`.
* :mod:`gevent.queue` imports ``_PySimpleQueue`` instead of
``SimpleQueue`` so that it doesn't block the event loop.
:func:`gevent.monkey.patch_all` makes this same substitution in
:mod:`queue`. This fixes issues with
:class:`concurrent.futures.ThreadPoolExecutor` as well. Reported in
:issue:`1248` by wwqgtxx and :issue:`1251` by pyld.
* :meth:`gevent.socket.socket.connect` doesn't pass the port (service)
to :func:`socket.getaddrinfo` when it resolves an ``AF_INET`` or
``AF_INET6`` address. (The standard library doesn't either.) This
fixes an issue on Solaris. Reported in :issue:`1252` by wiggin15.
* :meth:`gevent.socket.socket.connect` works with more address
families, notably AF_TIPC, AF_NETLINK, AF_BLUETOOTH, AF_ALG and AF_VSOCK.
- Update to 1.3.4
* Be more careful about issuing ``MonkeyPatchWarning`` for ssl
imports. Now, we only issue it if we detect the one specific
condition that is known to lead to RecursionError. This may produce
false negatives, but should reduce or eliminate false positives.
* Based on measurements and discussion in :issue:`1233`, adjust the
way :mod:`gevent.pywsgi` generates HTTP chunks. This is intended to
reduce network overhead, especially for smaller chunk sizes.
* Additional slight performance improvements in :mod:`gevent.pywsgi`.
See :pr:`1241`.
OBS-URL: https://build.opensuse.org/request/show/627916
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=42
- Update to 1.3.3
* :func:`gevent.sleep` updates the loop's notion of the current time
before sleeping so that sleep duration corresponds more closely to
elapsed (wall clock) time. :class:`gevent.Timeout` does the same.
Reported by champax and FoP in :issue:`1227`.
* Fix an ``UnboundLocalError`` in SSL servers when wrapping a socket
throws an error. Reported in :issue:`1236` by kochelmonster.
- Update to 1.3.2
* Allow weak refeneces to :class:`gevent.queue.Queue`. Reported in
:issue:`1217` by githrdw.
- Update to 1.3.1
* Allow weak references to :class:`gevent.event.Event`. Reported in
:issue:`1211` by Matias Guijarro.
* Fix embedded uses of :func:`gevent.Greenlet.spawn`, especially under
uwsgi. Reported in :issue:`1212` by Kunal Gangakhedkar.
* Fix :func:`gevent.os.nb_write` and :func:`gevent.os.nb_read` not
always closing the IO event they opened in the event of an
exception. This would be a problem especially for libuv.
- Update to 1.3.0
+ Dependencies
* Cython 0.28.2 is now used to build gevent from a source checkout.
* The bundled libuv is now 1.19.2, up from 1.18.0.
* On Windows, CFFI is now a dependency so that the libuv backend
really can be used by default.
* Cython 0.28b1 or later is now required to build gevent from a source
checkout (Cython is *not* required to build a source distribution
from PyPI).
* Update c-ares to 1.14.0. See :issue:`1105`.
* The bundled libuv is now 1.20.1, up from 1.19.2. See :issue:`1177`.
* gevent now **requires** the patched version of libuv it is
distributed with. Building gevent with a non-embedded libuv, while
not previously supported, is not possible now. See
:issue:`1126`.
* gevent is now built and tested with Cython 0.27. This is required
for Python 3.7 support.
* Update c-ares to 1.13.0. See :issue:`990`.
+ Platform Support
* Travis CI tests on Python 3.7.0b3.
* Windows now defaults to the libuv backend if CFFI is installed. See
:issue:`1163`.
* Python 3.7 passes the automated memory leak checks. See :issue:`1197`.
* Python 3.7.0b4 is now the tested and supported version of Python
3.7. PyPy 6.0 has been tested, although CI continues to use 5.10.
* Travis CI tests on Python 3.7.0b2 and PyPy 2.7 5.10.0 and PyPy 3.5
5.10.1.
* Add initial support for Python 3.7a3. It has the same level of
support as Python 3.6.
> Using unreleased Cython 0.28 and greenlet 0.4.13; requires Python 3.7a3.
> The ``async`` functions and classes have been renamed to
``async_`` due to ``async`` becoming a keyword in Python 3.7.
Aliases are still in place for older versions. See :issue:`1047`.
* gevent is now tested on Python 3.6.4. This includes the following
fixes and changes:
> Errors raised from :mod:`gevent.subprocess` will have a
``filename`` attribute set.
> The :class:`threading.Timer` class is now monkey-patched and can
be joined. Previously on Python 3.4 and above, joining a ``Timer``
would hang the process.
> :meth:`gevent.ssl.SSLSocket.unwrap` behaves more like the standard
library, including returning a SSLSocket and allowing certain
timeout-related SSL errors to propagate. The added standard
library tests ``test_ftplib.py`` now passes.
> :class:`gevent.subprocess.Popen` accepts a "path-like object" for
the *cwd* parameter on all platforms. Previously this only worked
on POSIX platforms under Python 3.6. Now it also works on Windows under
Python 3.6 (as expected) and is backported to all previous versions.
* Linux CI now tests on PyPy3 3.5-5.9.0, updated from PyPy3 3.5-5.7.1.
See :issue:`1001`. PyPy2 has been updated to 5.9.0 from 5.7.1,
Python 2.7 has been updated to 2.7.14 from 2.7.13, Python 3.4 is
updated to 3.4.7 from 3.4.5, Python 3.5 is now 3.5.4 from 3.5.3, and
Python 3.6 is now 3.6.4 from 3.6.0.
* Drop support for Python 3.3. The documentation has only claimed
support for 3.4+ since gevent 1.2 was released, and only 3.4+ has
been tested. This merely removes the supporting Trove classifier and
remaining test code. See :issue:`997`.
* PyPy is now known to run on Windows using the libuv backend, with
caveats. See the section on libuv for more information.
* Due to security concerns, official support for Python 2.7.8 and
earlier (without a modern SSL implementation) has been dropped.
These versions are no longer tested with gevent, but gevent can
still be installed on them. Supporting code will be removed in the
next major version of gevent. See :issue:`1073`.
* `gevent.subprocess.Popen` uses ``/proc/self/fd`` (on Linux) or
``/dev/fd`` (on BSD, including macOS) to find the file descriptors
to close when ``close_fds`` is true. This matches an optimization
added to Python 3 (and backports it to Python 2.7), making process
spawning up to 9 times faster. Also, on Python 3, since Python 3.3
is no longer supported, we can also optimize the case where
``close_fds`` is false (not the default), making process spawning up
to 38 times faster. Initially reported in :issue:`1172` by Ofer Koren.
+ Bug Fixes
* :class:`gevent.local.local` subclasses that mix-in ABCs can be instantiated.
Reported in :issue:`1201` by Bob Jordan.
* Fix a bug detecting whether we can use the memory monitoring
features when psutil is not installed.
* On Python 2, when monkey-patching `threading.Event`, also
monkey-patch the underlying class, ``threading._Event``. Some code
may be type-checking for that. See :issue:`1136`.
* Fix libuv io watchers polling for events that only stopped watchers
are interested in, reducing CPU usage. Reported in :issue:`1144` by
wwqgtxx.
* Fix calling ``shutdown`` on a closed socket. It was raising
``AttributeError``, now it once again raises the correct
``socket.error``. Reported in :issue:`1089` by André Cimander.
* Fix an interpreter crash that could happen if two or more ``loop``
objects referenced the default event loop and one of them was
destroyed and then the other one destroyed or (in the libev C
extension implementation only) deallocated (garbage collected). See
:issue:`1098`.
* Fix a race condition in libuv child callbacks. See :issue:`1104`.
* If a single greenlet created and destroyed many
:class:`gevent.local.local` objects without ever exiting, there
would be a leak of the function objects intended to clean up the
locals after the greenlet exited. Introduce a weak reference to
avoid that. Reported in :issue:`981` by Heungsub Lee.
* pywsgi also catches and ignores by default
:const:`errno.WSAECONNABORTED` on Windows. Initial patch in
:pr:`999` by Jan van Valburg.
* :meth:`gevent.subprocess.Popen.communicate` returns the correct type
of str (not bytes) in universal newline mode under Python 3, or when
an encoding has been specified. Initial patch in :pr:`939` by
William Grzybowski.
* :meth:`gevent.subprocess.Popen.communicate` (and in general,
accessing ``Popen.stdout`` and ``Popen.stderr``) returns the correct
type of str (bytes) in universal newline mode under Python 2.
Previously it always returned unicode strings. Reported in
:issue:`1039` by Michal Petrucha.
* :class:`gevent.fileobject.FileObjectPosix` returns native strings in
universal newline mode on Python 2. This is consistent with what
:class:`.FileObjectThread` does. See :issue:`1039`.
* ``socket.send()`` now catches ``EPROTOTYPE`` on macOS to handle a race
condition during shutdown. Fixed in :pr:`1035` by Jay Oster.
* :func:`gevent.socket.create_connection` now properly cleans up open
sockets if connecting or binding raises a :exc:`BaseException` like
:exc:`KeyboardInterrupt`, :exc:`greenlet.GreenletExit` or
:exc:`gevent.timeout.Timeout`. Reported in :issue:`1044` by
kochelmonster.
+ Enhancements
* Add additional optimizations for spawning greenlets, making it
faster than 1.3a2.
* Use strongly typed watcher callbacks in the libuv CFFI extensions.
This prevents dozens of compiler warnings.
* When gevent prints a timestamp as part of an error message, it is
now in UTC format as specified by RFC3339.
* Threadpool threads that exit now always destroy their hub (if one
was created). This prevents some forms of resource leaks (notably
visible as blocking functions reported by the new monitoring abilities).
* Hub objects now include the value of their ``name`` attribute in
their repr.
* Pools for greenlets and threads have lower overhead, especially for
``map``. See :pr:`1153`.
* The undocumented, internal implementation classes ``IMap`` and
``IMapUnordered`` classes are now compiled with Cython, further
reducing the overhead of ``[Thread]Pool.imap``.
* The classes `gevent.event.Event` and `gevent.event.AsyncResult`
are compiled with Cython for improved performance, as is the
``gevent.queue`` module and ``gevent.hub.Waiter`` and certain
time-sensitive parts of the hub itself. Please report any
compatibility issues.
* ``python -m gevent.monkey <script>`` accepts more values for
``<script>``, including paths to packages or compiled bytecode.
Reported in :issue:`1157` by Eddie Linder.
* Add a simple event framework for decoupled communication. It uses
:mod:`zope.event` if that is installed.
* :mod:`gevent.monkey` has support for plugins in the form of event
subscribers and setuptools entry points. See :pr:`1158` and
:issue:`1162`. setuptools must be installed at runtime for its entry
points to function.
* Add the ``dnspython`` resolver as a lightweight alternative to
c-ares. It is generally faster than c-ares and is supported on PyPy.
c-ares may be deprecated in the future. See :pr:`1088` and
:issue:`1103`.
* Add the module :mod:`gevent.time` that can be imported instead of
:mod:`time`, much like :mod:`gevent.socket` can be imported instead
of :mod:`socket`. It contains ``gevent.sleep``. This aids
monkey-patching.
* Simple subclasses of `gevent.local.local` now have the same
(substantially improved) performance characteristics of plain
`gevent.local.local` itself, making them 2 to 3 times faster than
before. See :pr:`1117`. If there are any compatibility
problems, please open issues.
* Add `gevent.util.assert_switches` to build on the monitoring
functions. Fixes :issue:`1182`.
* A started monitor thread for the active hub now survives a fork. See
:issue:`1185`.
* The greenlet tracer functions used for the various monitoring
capabilities are now compiled with Cython for substantially lower
overhead. See :pr:`1190`.
* libuv now collects all pending watchers and runs their callbacks at
the end of the loop iteration using UV_RUN_ONCE. This eliminates the
need to patch libuv to be greenlet-safe. It also means that
zero-duration timer watchers are actual timer watchers again
(instead of being turned into check watchers); newly added
zero-duration timers cannot block the event loop because they won't
be run until a safe time.
+ Monitoring and Debugging
* Introduce the configuration variable
`gevent.config.track_greenlet_tree` (aka
``GEVENT_TRACK_GREENLET_TREE``) to allow disabling the greenlet tree
features for applications where greenlet spawning is performance
critical. This restores spawning performance to 1.2 levels.
* Add an optional monitoring thread for each hub. When enabled, this
thread (by default) looks for greenlets that block the event loop
for more than 0.1s. You can add your own periodic monitoring
functions to this thread. Set ``GEVENT_MONITOR_THREAD_ENABLE`` to
use it, and ``GEVENT_MAX_BLOCKING_TIME`` to configure the blocking
interval.
* The monitoring thread emits events when it detects certain
conditions, like loop blocked or memory limits exceeded.
* Add settings for monitoring memory usage and emitting events when a
threshold is exceeded and then corrected. gevent currently supplies
no policy for what to do when memory exceeds the configured limit.
``psutil`` must be installed to use this. See :pr:`1150`.
* Greenlet objects now keep track of their spawning parent greenlet
and the code location that spawned them, in addition to maintaining
a "spawn tree local" mapping. This adds some runtime overhead in
relative terms, but absolute numbers are still relatively small.
Based on a proposal from PayPal and comments by Mahmoud Hashemi and
Kurt Rose. See :issue:`755` and :pr:`1115`. As always, feedback is
appreciated.
* Greenlet objects now have a `minimal_ident
<gevent.Greenlet.minimal_ident>` property. It functions
similarly to ``Thread.ident`` or ``id`` by uniquely identifying the
greenlet object while it remains alive, and it can be reused after
the greenlet object is dead. It is different in that it is small and
sequential. Based on a proposal from PayPal and comments by Mahmoud
Hashemi and Kurt Rose. See :issue:`755`. As always, feedback is
appreciated.
* `gevent.Greenlet` objects now have a `gevent.Greenlet.name`
attribute that is included in the default repr.
* Include the values of `gevent.local.local` objects associated with
each greenlet in `gevent.util.format_run_info`.
* Add `gevent.util.GreenletTree` to visualize the greenlet tree. This
is used by `gevent.util.format_run_info`.
+ Build Changes
* Fix building from a source distribution (PyPI) without Cython
installed.
* When building gevent from a source checkout (*not* a distributed
source distribution), ``make`` is no longer required and the
``Makefile`` is not used. Neither is an external ``cython`` command.
Instead, the ``cythonize`` function is used, as recommended by
Cython. (The external commands were never required by source
distributions.) See :issue:`1076`.
* :class:`gevent.local.local` is compiled with Cython on CPython.
* The Cython ares 'channel' class is no longer declared to be publicly
accessible from a named C structure. Doing so caused a conflict with
the c-ares header files.
* Update autoconf's config.guess and config.sub to the latest versions
for c-ares and libev.
+ Subprocess
* Make :class:`gevnt.subprocess.Popen` accept the ``restore_signals``
keyword argument on all versions of Python, and on Python 2 have it
default to false. It previously defaulted to true on all versions;
now it only defaults to true on Python 3. The standard library in
Python 2 does not have this argument and its behaviour with regards
to signals is undocumented, but there is code known to rely on
signals not being restored under Python 2. Initial report and patch
in :pr:`1063` by Florian Margaine.
* Allow :class:`gevent.subprocess.Popen` to accept the keyword
arguments ``pass_fds`` and ``start_new_session`` under Python 2.
They have always had the same default as Python 3, namely an empty
tuple and false, but now are accessible to Python 2.
* Support the ``capture_output`` argument added to Python 3.7 in
:func:`gevent.subprocess.run`.
+ Configuration
* Centralize all gevent configuration in an object at
``gevent.config``, allowing for gevent to be configured through code
and not *necessarily* environment variables, and also provide a
centralized place for documentation. See :issue:`1090`.
> The new ``GEVENT_CORE_CFFI_ONLY`` environment variable has been
replaced with the pre-existing ``GEVENT_LOOP`` environment
variable. That variable may take the values ``libev-cext``,
``libev-cffi``, or ``libuv-cffi``, (or be a list in preference
order, or be a dotted name; it may also be assigned to an
object in Python code at ``gevent.config.loop``).
> The ``GEVENTARES_SERVERS`` environment variable is deprecated in
favor of ``GEVENT_RESOLVER_SERVERS``. See :issue:`1103`.
+ Other Changes
* The internal, undocumented module ``gevent._threading`` has been
simplified.
* The internal, undocumented class ``gevent._socket3._fileobject`` has
been removed. See :issue:`1084`.
* Simplify handling of the libev default loop and the ``destroy()``
method. The default loop, when destroyed, can again be requested and
it will regenerate itself. The default loop is the only one that can
receive child events.
* Make :meth:`gevent.socket.socket.sendall` up to ten times faster on
PyPy3, through the same change that was applied in gevent 1.1b3 for PyPy2.
* Be more careful about issuing a warning about patching SSL on
Python 2. See :issue:`1108`.
* Signal handling under PyPy with libuv is more reliable. See
:issue:`1112`.
* The :mod:`gevent.greenlet` module is now compiled with Cython to
offset any performance decrease due to :issue:`755`. Please open
issues for any compatibility concerns. See :pr:`1115` and :pr:`1120`.
* On CPython, allow the pure-Python implementations of
`gevent.Greenlet`, `gevent.local` and `gevent.lock` to be
used when the environment variable ``PURE_PYTHON`` is set. This is
not recommended except for debugging and testing. See :issue:`1118`.
* :meth:`gevent.select.poll.poll` now interprets a *timeout* of -1 the
same as a *timeout* of *None* as the standard requires. Previously,
on libuv this was interpreted the same as a *timeout* of 0. In
addition, all *timeout* values less than zero are interpreted like
*None* (as they always were under libev). See :issue:`1127`.
* Monkey-patching now defaults to patching ``threading.Event``.
* ``Pool.add`` now accepts ``blocking`` and ``timeout`` parameters,
which function similarly to their counterparts in ``Semaphore``.
See :pr:`1032` by Ron Rothman.
* Defer adjusting the stdlib's list of active threads until
``threading`` is monkey patched. Previously this was done when
:mod:`gevent.threading` was imported. That module is documented to
be used as a helper for monkey patching, so this should generally
function the same, but some applications ignore the documentation
and directly import that module anyway.
A positive consequence is that ``import gevent.threading, threading;
threading.current_thread()`` will no longer return a DummyThread
before monkey-patching. Another positive consequence is that PyPy
will no longer print a ``KeyError`` on exit if
:mod:`gevent.threading` was imported *without* monkey-patching.
See :issue:`984`.
* Specify the Requires-Python metadata for improved installation
support in certain tools (setuptools v24.2.1 or newer is required).
See :issue:`995`.
* Monkey-patching after the :mod:`ssl` module has been imported now
prints a warning because this can produce ``RecursionError``.
* :class:`gevent.local.local` objects are now approximately 3.5 times faster
getting, setting and deleting attributes on PyPy. This involved
implementing more of the attribute protocols directly. Please open
an issue if you have any compatibility problems. See :issue:`1020`.
* :class:`gevent.local.local` is compiled with Cython on CPython. It
was already 5 to 6 times faster due to the work on :issue:`1020`,
and compiling it with Cython makes it another 5 to 6 times faster,
for a total speed up of about 35 times. It is now in the same
ballpark as the native :class:`threading.local` class. It also uses
one pointer less memory per object, and one pointer less memory per
greenlet. See :pr:`1024`.
* More safely terminate subprocesses on Windows with
:meth:`gevent.subprocess.Popen.terminate`. Reported in :issue:`1023`
by Giacomo Debidda.
* gevent now uses cffi's "extern 'Python'" callbacks. These should be
faster and more stable. This requires at least cffi 1.4.0. See :issue:`1049`.
* gevent now approximately tries to stick to a scheduling interval
when running callbacks, instead of simply running a count of
callbacks. The interval is determined by
:func:`gevent.getswitchinterval`. On Python 3, this is the same as
the thread switch interval. On Python 2, this defaults to 0.005s and
can be changed with :func:`gevent.setswitchinterval`. This should
result in more fair "scheduling" of greenlets, especially when
``gevent.sleep(0)`` or other busy callbacks are in use. The interval
is checked every 50 callbacks to keep overhead low. See
:issue:`1072`. With thanks to Arcadiy Ivanov and Antonio Cuni.
* The long-deprecated and undocumented module ``gevent.wsgi`` was removed.
+ libuv
* Add initial *experimental* support for using libuv as a backend
instead of libev, controlled by setting the environment variable
``GEVENT_CORE_CFFI_ONLY=libuv`` before importing gevent. This
suffers a number of limitations compared to libev, notably:
> libuv support is not available in the manylinux wheels uploaded to
PyPI. The manylinux specification requires glibc 2.5, while libuv
requires glibc 2.12. Install from source to access libuv on Linux
(e.g., pip's ``--no-binary`` option).
> Timers (such as ``gevent.sleep`` and ``gevent.Timeout``) only
support a resolution of 1ms (in practice, it's closer to 1.5ms).
Attempting to use something smaller will automatically increase it
to 1ms and issue a warning. Because libuv only supports
millisecond resolution by rounding a higher-precision clock to an
integer number of milliseconds, timers apparently suffer from more
jitter.
> Using negative timeouts may behave differently from libev.
> libuv blocks delivery of all signals, so signals are handled using
an (arbitrary) 0.3 second timer. This means that signal handling
will be delayed by up to that amount, and that the longest the
event loop can sleep in the operating system's ``poll`` call is
that amount. Note that this is what gevent does for libev on
Windows too.
> libuv only supports one io watcher per file descriptor, whereas
libev and gevent have always supported many watchers using
different settings. The libev behaviour is emulated at the Python
level, but that adds overhead.
> Looping multiple times and expecting events for the same file
descriptor to be raised each time without any data being read or
written (as works with libev) does not appear to work correctly on
Linux when using ``gevent.select.poll`` or a monkey-patched
``selectors.PollSelector``.
> The build system does not support using a system libuv; the
embedded copy must be used. Using setuptools to compile libuv was
the most portable method found.
> If anything unexpected happens, libuv likes to ``abort()`` the
entire process instead of reporting an error. For example, closing
a file descriptor it is using in a watcher may cause the entire
process to be exited.
> There may be occasional otherwise unexplained and hard to
duplicate crashes. If you can duplicate a crash, **please** submit
an issue.
> This is the only backend that PyPy can use on Windows. As of this
alpha, there are many known issues with non-blocking sockets
(e.g., as used by :mod:`asyncore`; see ``test_ftplib.py``) and
sometimes sockets not getting closed in a timely fashion
(apparently; see ``test_httpservers.py``) and communicating with
subprocesses (it always hangs). Help tracking those down would be
appreciated. Only PyPy2 is tested.
Other differences include:
> The order in which timers and other callbacks are invoked may be
different than in libev. In particular, timers and IO callbacks
happen in a different order, and timers may easily be off by up to
half of the supposed 1ms resolution. See :issue:`1057`.
> Starting a ``timer`` watcher does not update the loop's time by
default. This is because, unlike libev, a timer callback can cause
other timer callbacks to be run if they expire because the loop's
time updated, without cycling the event loop. See :issue:`1057`.
libev has also been changed to follow this behaviour.
Also see :issue:`1072`.
> Timers of zero duration do not necessarily cause the event loop to
cycle, as they do in libev. Instead, they may be called
immediately. If zero duration timers are added from other zero
duration timer callbacks, this can lead the loop to appear to
hang, as no IO will actually be done.
To mitigate this issue, ``loop.timer()`` detects attempts to use
zero duration timers and turns them into a check watcher. check
watchers do not support the ``again`` method.
> All watchers (e.g., ``loop.io``) and the ``Timeout`` class have a
``close`` method that should be called when code is done using the
object (they also function as context managers and a ``with``
statement will automatically close them). gevent does this
internally for sockets, file objects and internal timeouts.
Neglecting to close an object may result in leaking native
resources. To debug this, set the environment variables
``GEVENT_DEBUG=debug`` and ``PYTHONTRACEMALLOC=n`` before starting
the process.
The traditional cython-based libev backend will not leak if
``close`` is not called and will not produce warnings. The
CFFI-based libev backend will not currently leak but will produce
warnings. The CFFI-based libuv backend may leak and will produce
warnings.
Again, this is extremely experimental and all of it is subject to
change.
See :issue:`790` for history and more in-depth discussion.
+ libev
* The C extension has been updated to use more modern Cython idioms
and generate less code for simplicity, faster compilation and better
cache usage. See :pr:`1077`.
> Watcher objects may be slightly larger. On a 64-bit platform, a
typical watcher may be 16 bytes (2 pointers) larger. This is
offset by slight performance gains.
> Cython is no longer preprocessed. Certain attributes that were
previously only defined in certain compilation modes (notably
LIBEV_EMBED) are now always defined, but will raise
``AttributeError`` or have a negative value when not available. In
general these attributes are not portable or documented and are
not implemented by libuv or the CFFI backend. See :issue:`1076`.
> Certain private helper functions (``gevent_handle_error``, and part of
``gevent_call``) are now implemented in Cython instead of C. This
reduces our reliance on internal undocumented implementation
details of Cython and Python that could change. See :pr:`1080`.
OBS-URL: https://build.opensuse.org/request/show/616609
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=40
* Python 2: ``sendall`` on a non-blocking socket could spuriously fail
with a timeout.
* If ``sys.stderr`` has been monkey-patched (not recommended),
exceptions that the hub reports aren't lost and can still be caught.
Reported in :issue:`825` by Jelle Smet.
* :class:`selectors.SelectSelector` is properly monkey-patched
regardless of the order of imports. Reported in :issue:`835` by
Przemysław Węgrzyn.
* Python 2: ``reload(site)`` no longer fails with a ``TypeError`` if
gevent has been imported. Reported in :issue:`805` by Jake Hilton.
* Nested callbacks that set and clear an Event no longer cause
``wait`` to return prematurely. Reported in :issue:`771` by Sergey
Vasilyev.
* Fix build on Solaris 10. Reported in :issue:`777` by wiggin15.
* The ``ref`` parameter to :func:`gevent.os.fork_and_watch` was being ignored.
* Python 3: :class:`gevent.queue.Channel` is now correctly iterable, instead of
raising a :exc:`TypeError`.
* Python 3: Add support for :meth:`socket.socket.sendmsg`,
:meth:`socket.socket.recvmsg` and :meth:`socket.socket.recvmsg_into`
on platforms where they are defined. Initial :pr:`773` by Jakub
Klama.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-gevent?expand=0&rev=23
