Make gevent.lock.RLock.acquire accept the timeout parameter.
Fix an AttributeError when wrapping gevent’s FileObject
around an opened text stream. Reported in issue #1542 by
dmrlawson.
Fix compilation of libuv on AIX and Solaris 10. See pull request #1549 and pull request #1548 by Arnon Yaari.
Python version updates: gevent is now tested with CPython 3.6.10, 3.7.7 and 3.8.2. It is also tested with PyPy2 7.3 and PyPy 3.6 7.3.
The include directories used to compile the C extensions have been tweaked with the intent of making it easier to use older debug versions of Python. See issue #1461.
The binary wheels and installed package no longer include generated C source files and headers. Also excluded are Cython .pxd files, which were never documented. Please file an issue if you miss these.
Upgrade libev from 4.25 to 4.31 and update its embedded
config.guess to the latest. See issue #1504.
Important
libev, when built with EV_VERIFY >= 2, now performs
verification of file descriptors when IO watchers are started
and when they are stopped. If you first close a file descriptor
and only then stop an associated watcher, libev will abort the
process.
Using the standard gevent socket and file objects handles this automatically, but if you’re using the IO watchers directly, you’ll need to watch out for this.
The binary wheels gevent distributes do not set EV_VERIFY
and don’t have this issue.
Make libuv and libev use the Python memory allocators. This assists with debugging. The event libraries allocate small amounts of memory at startup. The allocation functions have to take the GIL, but because of the limited amount of actual allocation that gets done this is not expected to be a bottleneck.
Update the bundled tblib library to the unreleased 1.7.0
version. The only change is to add more attributes to Frame and Code
objects for pytest compatibility. See pull request #1541.
Remove the magic proxy object gevent.signal. This served as both
a deprecated alias of gevent.signal_handler and the module
gevent.signal. This made it confusing to humans and static
analysis tools alike. The alias was deprecated since gevent 1.1b4.
See issue #1596.
Make gevent.subprocess.Popen.communicate raise exceptions raised
by reading from the process, like the standard library. In
particular, under Python 3, if the process output is being decoded
as text, this can now raise UnicodeDecodeError. Reported in
issue #1510 by Ofer Koren.
Make gevent.subprocess.Popen.communicate be more careful about
closing files. Previously if a timeout error happened, a second call
to communicate might not close the pipe.
Add gevent.contextvars, a cooperative version of contextvars.
This is available to all Python versions. On Python 3.7 and above,
where contextvars is a standard library module, it is
monkey-patched by default. See issue #1407.
Use selectors.PollSelector as the selectors.DefaultSelector
after monkey-patching if select.poll was defined. Previously,
gevent replaced it with selectors.SelectSelector, which has a
different set of limitations (e.g., on certain platforms such as
glibc Linux, it has a hardcoded limitation of only working with file
descriptors < 1024). See issue #1466 reported by Sam Wong.
Make the dnspython resolver work if dns python had been imported before the gevent resolver was initialized. Reported in issue #1526 by Chris Utz and Josh Zuech.
Python version updates: gevent is now tested with CPython 2.7.17, 3.5.9, 3.6.9, 3.7.5 and 3.8.0 (final). It is also tested with PyPy2 7.2 and PyPy 3.6 7.2
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
HTTP/1.0. Based on pull request #1331 by tanchuhan.
Fix a potential crash using gevent.idle() when using libuv. See
issue #1489.
Fix some potential crashes using libuv async watchers.
Make ThreadPool consistently raise InvalidThreadUseError
when spawn is called from a thread different than the thread
that created the threadpool. This has never been allowed, but was
inconsistently enforced. On gevent 1.3 and before, this would always
raise “greenlet error: invalid thread switch,” or LoopExit. On
gevent 1.4, it could raise LoopExit, depending on the number
of tasks, but still, calling it from a different thread was likely
to corrupt libev or libuv internals.
Remove some undocumented, deprecated functions from the threadpool module.
libuv: Fix a perceived slowness spawning many greenlets at the same time without yielding to the event loop while having no active IO watchers or timers. If the time spent launching greenlets exceeded the switch interval and there were no other active watchers, then the default IO poll time of about .3s would elapse between spawning batches. This could theoretically apply for any non-switching callbacks. This can be produced in synthetic benchmarks and other special circumstances, but real applications are unlikely to be affected. See issue #1493.
Fix using the threadpool inside a script or module run with python
-m gevent.monkey. Previously it would use greenlets instead of
native threads. See issue #1484.
Fix potential crashes in the FFI backends if a watcher was closed
and stopped in the middle of a callback from the event loop and then
raised an exception. This could happen if the hub’s handle_error
function was poorly customized, for example. See issue #1482
Make gevent.killall stop greenlets from running that hadn’t been
run yet. This make it consistent with Greenlet.kill(). See
issue #1473 reported by kochelmonster.
Make gevent.spawn_raw set the loop attribute on returned
greenlets. This lets them work with more gevent APIs, notably
gevent.killall(). They already had dictionaries, but this may
make them slightly larger, depending on platform (on CPython 2.7
through 3.6 there is no apparent difference for one attribute but on
CPython 3.7 and 3.8 dictionaries are initially empty and only
allocate space once an attribute is added; they’re still smaller
than on earlier versions though).
Caution
There may be breaking changes here for applications that relied on the old behaviour. The old behaviour was under specified and inconsistent and really only worked consistently with ‘wb’ and ‘rb’ modes, so most applications shouldn’t be affected.
The file objects (FileObjectPosix, FileObjectThread) now
consistently support 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.
Add support for CPython 3.8.0. (Windows wheels are not yet available.)
Update to Cython 0.29.13 and cffi 1.12.3.
Add an --module option to gevent.monkey allowing to run a Python
module rather than a script. See pull request #1440.
Improve the way joining the main thread works on Python 3.
Implement SSLSocket.verify_client_post_handshake() when available.
Fix tests when TLS1.3 is supported.
Disable Nagle’s algorithm in the backdoor server. This can improve interactive response time.
Test on Python 3.7.4. There are important SSL test fixes.
Python version updates: gevent is now tested with CPython 2.7.16, 3.5.6, 3.6.8, and 3.7.2. It is also tested with PyPy2 7.1 and PyPy 3.6 7.1 (PyPy 7.0 and 7.1 were not capable of running SSL tests on Travis CI).
Support for Python 3.4 has been removed, as that version is no longer supported uptstream.
gevent binary wheels are now manylinux2010 and include libuv support. pip 19 is needed to install them. See issue #1346.
gevent is now compiled with Cython 0.29.6 and cffi 1.12.2.
gevent sources include a pyproject.toml file, specifying the build requirements and enabling build isolation. pip 18 or above is needed to take advantage of this. See issue #1180.
libev-cffi: Let the compiler fill in the definition of nlink_t for
st_nlink in struct stat, instead of trying to guess it
ourself. Reported in issue #1372 by Andreas Schwab.
Remove the Makefile. Its most useful commands, make clean
and make distclean, can now be accomplished in a cross-platform
way using python setup.py clean and python setup.py clean
-a, respectively. The remainder of the Makefile contained
Travis CI commands that have been moved to .travis.yml.
Deprecate the EMBED and LIBEV_EMBED, etc, build-time environment
variables. Instead, use GEVENTSETUP_EMBED and
GEVENTSETUP_EMBED_LIBEV. See issue #1402.
The CFFI backends now respect the embed build-time setting. This allows building the libuv backend without embedding libuv (except on Windows).
Support test resources. This allows disabling tests that use the network. See Limiting Resource Usage for more.
Upgrade libuv from 1.24.0 to 1.27.0.
Upgrade libev from 4.23 to 4.25 and update its embedded
config.guess to the latest.
Upgrade c-ares from 1.14 to 1.15.
dnspython >= 1.16.0 is now required for the dnspython resolver.
Python 3.7 subprocess: Copy a STARTUPINFO passed as a parameter.
Contributed by AndCycle in pull request #1352.
subprocess: WIFSTOPPED and SIGCHLD are now handled for
determining Popen.returncode. See
https://bugs.python.org/issue29335
subprocess: No longer close redirected FDs if they are in
pass_fds. This is a bugfix from Python 3.7 applied to all versions
gevent runs on.
Fix certain operations on a Greenlet in an invalid state (with an
invalid parent) to raise a TypeError sooner rather than an
AttributeError later. This is also slightly faster on CPython with
Cython. Inspired by issue #1363 as reported by Carson Ip. This
means that some extreme corner cases that might have passed by
replacing a Greenlet’s parent with something that’s not a gevent hub
now no longer will.
Fix: The spawning_stack for Greenlets on CPython should now have
correct line numbers in more cases. See pull request #1379.
The result of gevent.ssl.SSLSocket.makefile() can be used as a
context manager on Python 2.
Python 2: If the backport of the _thread_ module from
futures has already been imported at monkey-patch time, also
patch this module to be consistent. The pkg_resources package
imports this, and pkg_resources is often imported early on
Python 2 for namespace packages, so if futures is installed this
will likely be the case.
Python 2: Avoid a memory leak when an io.BufferedWriter is wrapped
around a socket. Reported by Damien Tournoud in issue #1318.
Avoid unbounded memory usage when creating very deep spawn trees. Reported in issue #1371 by dmrlawson.
Win: Make examples/process.py do something useful. See
pull request #1378 by Robert Iannucci.
Spawning greenlets can be up to 10% faster. See pull request #1379.
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