changelog.rst

Changelog

.. currentmodule:: gevent

Release 0.13.1 (Sep 23, 2010)

Release highlights:

• Fixed :mod:`monkey` to patch :func:`socket.create_connection <gevent.socket.create_connection>`.
• Updated :mod:`gevent.ssl` module to fully match the functionality of :mod:`ssl` on Python 2.7.
• Fixed :meth:`Group.join` to handle raise_error=True properly, it used to raise :exc:`TypeError` (issue #36). Thanks to by David Hain.
• Fixed :mod:`gevent.wsgi` and :mod:`gevent.pywsgi` to join multiple Cookie headers (issue #40).
• Fixed :func:`select <gevent.select.select>` to recognize long arguments in addition to int.
• Fixed :meth:`Semaphore.acquire` to return False when timeout expires instead of raising :exc:`AssertionError` (issue #39). Patch by Teh Ekik.
• Fixed :meth:`JoinableQueue.join` to return immediatelly if queue is already empty (issue #45). Patch by Dmitry Chechik.
• Deprecated :mod:`gevent.sslold` module.

:mod:`gevent.socket` module:

• Overrode :meth:`socket.shutdown` method to interrupt read/write operations on socket.
• Fixed possible :exc:`NameError` in :meth:`socket.connect_ex` method. Patch by Alexey Borzenkov.
• Fixed socket leak in :func:`create_connection` function.
• Made :mod:`gevent.socket` import all public items from stdlib :mod:`socket` that do not do I/O.

:mod:`gevent.ssl` module:

• Imported a number of patches from stdlib by Antoine Pitrou:
  • Calling :meth:`makefile` method on an SSL object would prevent the underlying socket from being closed until all objects get truely destroyed (Python issue #5238).
  • SSL handshake would ignore the socket timeout and block indefinitely if the other end didn't respond (Python issue #5103).
  • When calling :meth:`getpeername` in SSLSocket.__init__, only silence exceptions caused by the "socket not connected" condition.
• Added support for ciphers argument.
• Updated SSLSocket.send and SSLSocket.recv methods to match the behavior of stdlib :mod:`ssl` better.
• Fixed :class:`ssl.SSLObject` to delete events used by other greenlets when closing the instance (issue #34).

Miscellaneous:

• Made :class:`BaseServer` accept long values as pool argument in addition to int.
• Made :attr:`http._requests` attribute public.
• Updated webchat example to use file on disk rather than in-memory sqlite database to avoid :exc:`OperationalError`.
• Fixed webproxy.py example to be runnable under external WSGI server.
• Fixed bogus failure in test__exc_info.py.
• Added new test to check PEP8 conformance: xtest_pep8.py.
• Fixed :class:`BackdoorServer` close the connection on :exc:`SystemExit` and simplified the code.
• Made :class:`Pool` raise :exc:`ValueError` when initialized with size=0.
• Updated setup.py --libevent to configure and make libevent if it's not built already.
• Updated setup.py to use setuptools if present and add dependency on greenlet.
• Fixed doc/mysphinxext.py to work with Sphinx 1. Thanks by Örjan Persson.

Release 0.13.0 (Jul 14, 2010)

Release highlights:

• Added :mod:`gevent.server` module with :class:`StreamServer` class for easy implementing of TCP and SSL servers.
• Added :mod:`gevent.baseserver` module with :class:`BaseServer` class.
• Added new implementation of :mod:`gevent.pywsgi` based on :mod:`gevent.server`. Contributed by Ralf Schmitt.
• Added :mod:`gevent.local` module. Fixed issue #24. Thanks to Ted Suzman.
• Fixed a number of bugs in :mod:`gevent.wsgi` module.
• Fixed issue #26: closing a socket now interrupts all pending read/write operations on it.
• Implemented workaround that prevents greenlets from leaking exc_info.
• Fixed :meth:`socket.sendall` to use buffer object to prevent string copies.
• Made the interfaces of :mod:`gevent.wsgi` and :mod:`gevent.pywsgi` much more similar to each other.
• Fixed compilation on Windows with libevent-2.
• Improved Windows compatibility. Fixed issue #30. Thanks to Luigi Pugnetti.
• Fixed compatibility with Python 2.7.

Backward-incompatible changes:

• Blocking is now the default behaviour for the :meth:`Greenlet.kill` method and other kill* methods.
• Changed the inteface of :class:`http.HTTPServer` to match the interface of other servers.
• Changed :class:`Pool`'s :meth:`spawn` method to block until there's a free slot.
• Removed deprecated :func:`backdoor.backdoor_server` function.
• Removed deprecated functions in :mod:`socket` module:
  • :func:`socket_bind_and_listen`
  • :func:`set_reuse_addr`
  • :func:`connect_tcp`
  • :func:`tcp_server`
• Removed deprecated :attr:`socket.fd` property.
• Deprecated use of negative numbers to indicate infinite timeout in :func:`core.event.add` and :func:`socket.wait_read` and similar. Use None from now on, which is compatible with the previous versions.
• Derived :class:`backdoor.BackdoorServer` from :class:`StreamServer` rather than from :class:`Greenlet`. This adds lots of new features and removes a few old ones.
• Removed non-standard :attr:`balance` property from :class:`Semaphore`.
• Removed :func:`start`, :func:`set_cb` and :func:`set_gencb` from :class:`core.http`.
• Removed :func:`set_closecb` from :class:`core.http_connection`. It is now used internally to detach the requests of the closed connections.
• Deprecated :mod:`rawgreenlet` module.
• Deprecated :func:`util.lazy_property`.
• Renamed :class:`GreenletSet` to :class:`Group`. The old name is currently available as an alias.

:mod:`gevent.socket` module:

• Fixed issues #26 and #34: closing the socket while reading/writing/connecting is now safe. Thanks to Cyril Bay.
• Imported :func:`getfqdn` from :mod:`socket` module.
• The module now uses sys.platform to detect Windows rather than :mod:`platform` module.
• Fixed issue #27: :func:`getaddrinfo` used to handle the case when socktype or proto were equal to 0. Thanks to Randall Leeds.

:mod:`gevent.coros` module:

• Added :class:`RLock` class.
• Added :class:`DummySemaphore` class.
• Fixed :class:`BoundedSemaphore` class to behave like :class:`threading.BoundedSemaphore` behaves.

:mod:`gevent.event` module:

• Made :meth:`Event.wait` return internal flag instead of None.
• Made :meth:`AsyncResult.wait` return its value instead of None.
• Added :meth:`ready` method as an alias for :meth:`is_set`.

:mod:`gevent.wsgi` module:

• Removed :class:`wsgi.buffer_proxy`.

:mod:`gevent.pywsgi` module:

• Rewritten to use :mod:`server` and not to depend on :mod:`BaseHTTPServer`.
• Changed the interface to match :mod:`wsgi` module. Removed :func:`server` function, add :class:`Server` class, added :class:`WSGIServer` class.
• Renamed :class:`HttpProtocol` to :class:`WSGIHandler`.
• Fixed compatibility with webob by allowing an optional argument to :meth:`readline`.

:mod:`gevent.core` module:

• Fixed reference leaks in :class:`event` class.
• Avoid Python name lookups when accessing EV_* constants from Cython code. Patch by Daniele Varrazzo.
• Added persist argument to :class:`read_event`, :class:`write_event` and :class:`readwrite_event`.
• Made all of the event loop callbacks clear the exception info before exiting.
• Added :attr:`flags_str` property to :class:`event`. It is used by __str__ and __repr__.
• :class:`buffer <core.buffer>`:
  • Added :meth:`detach` method.
  • Implemented iterator protocol.
  • Fixed :meth:`readline` and :meth:`readlines` methods.
• :class:`http_request`:
  • Fixed :meth:`detach` to detach input and output buffers too.
  • Changed the response to send 500 error upon deallocation, if no response was sent by the user.
  • Made :attr:`input_buffer` and :attr:`output_buffer` store and reuse the :class:`buffer` object they create.
  • Fixed :meth:`__str__` and meth:__repr__ to include spaces where needed.
  • :class:`http` class no longer has :meth:`set_cb` and :meth:`set_gencb`. Instead its contructor accepts handle which will be called on each request.

:mod:`gevent.http` and :mod:`gevent.wsgi` modules:

• Made :class:`HTTPServer` use "Connection: close" header by default.
• Class :class:`HTTPServer` now derives from :class:`baseserver.BaseServer`. Thus its :meth:`start` method no longer accepts socket to listen on, it must be passed to the contructor.
• The spawn argument now accepts a :class:`Pool` instance. While the pool is full, the server replies with 503 error.
• The server no longer links to the greenlets it spawns to detect errors. Instead, it relies on :class:`http_request` which will send 500 reply when deallocated if the user hasn't send any.

Miscellaneous:

• Changed :mod:`gevent.thread` to use :class:`Greenlet` instead of raw greenlets. This means monkey patched thread will become :class:`Greenlet` too.
• Added :attr:`started` property to :class:`Greenlet`.
• Put common server code in :mod:`gevent.baseserver` module. All servers in gevent package are now derived from :class:`BaseServer`.
• Fixed issue #20: :func:`sleep` now raises :exc:`IOError` if passed a negative argument.
• Remove the code related to finding out libevent version from setup.py as macro USE_LIBEVENT_? is no longer needed to build gevent.core.
• Increased default backlog in all servers (from 5 to 256). Thanks to Nicholas Piël.
• Fixed doc/conf.py to work in Python older than 2.6. Thanks to Örjan Persson.
• Silented SystemError raised in :mod:`backdoor` when a client typed quit().
• If importing :mod:`greenlet` failed with ImportError, keep the original error message, because sometimes the error originates in setuptools.
• Changed :func:`select.select` to return all the file descriptors signalled, not just the first one.
• Made :mod:`thread` (and thus monkey patched threads) to spawn :class:`Greenlet` instances, rather than raw greenlets.

Examples:

• Updated echoserver.py to use :class:`StreamServer`.
• Added geventsendfile.py.
• Added wsgiserver_ssl.py.

Thanks to Ralf Schmitt for :mod:`pywsgi`, a number of fixes for :mod:`wsgi`, help with :mod:`baseserver` and :mod:`server` modules, improving setup.py and various other patches and suggestions.

Thanks to Uriel Katz for :mod:`pywsgi` patches.

Release 0.12.2 (Mar 2, 2010)

• Fixed http server to put the listening socket into a non-blocking mode. Contributed by Ralf Schmitt.

Release 0.12.1 (Feb 26, 2010)

• Removed a symlink from the distribution (that causes pip to fail). Thanks to Brad Clements for reporting it.
• setup.py: automatically create symlink from build/lib.../gevent/core.so to gevent/core.so.
• :mod:`gevent.socket`: Improved compatibility with stdlib's socket:
  • Fixed :class:`socket <gevent.socket.socket>` to raise timeout("timed out") rather than simply timeout.
  • Imported _GLOBAL_DEFAULT_TIMEOUT from standard :mod:`socket` module instead of creating a new object.

Release 0.12.0 (Feb 5, 2010)

Release highlights:

• Added :mod:`gevent.ssl` module.
• Fixed Windows compatibility (experimental).
• Improved performance of :meth:`socket.recv`, :meth:`socket.send` and similar methods.
• Added a new module - :mod:`dns` - with synchronous wrappers around libevent's DNS API.
• Added :class:`core.readwrite_event` and :func:`socket.wait_readwrite` functions.
• Fixed several incompatibilities of :mod:`wsgi` module with the WSGI spec.
• Deprecated :mod:`pywsgi` module.

:mod:`gevent.wsgi` module:

• Made env["REMOTE_PORT"] into a string.
• Fixed the server to close the iterator returned by the application.
• Made wsgi.input object iterable.

:mod:`gevent.core` module:

• Made DNS functions no longer accept/return IP addresses in dots-and-numbers format. They work with packed IPs now.
• Made DNS functions no longer accept additional arguments to pass to the callback.
• Fixed DNS functions to check the return value of the libevent functions and raise :exc:`IOError` if they failed.
• Added :func:`core.dns_err_to_string`.
• Made core.event.cancel not to raise if event_del reports an error. instead, the return code is passed to the caller.
• Fixed minor issue in string representation of the events.

:mod:`gevent.socket` module:

• Fixed bug in socket.accept. It could return unwrapped socket instance if socket's timeout is 0.
• Fixed socket.sendall implementation never to call underlying socket's sendall.
• Fixed :func:`gethostbyname` and :func:`getaddrinfo` to call the stdlib if the passed hostname has no dots.
• Fixed :func:`getaddrinfo` to filter the results using socktype and proto arguments.
• Removed :func:`getnameinfo` as it didn't quite match the stdlib interface. Use :func:`dns.resolve_reverse` for reverse resolutions.
• Fixed :meth:`socket.connect_ex` to use cooperative :func:`gethostbyname`.
• Fixed :meth:`socket.dup` not to call underlying socket's :meth:`dup` (which is not available on Windows) but to use Python's reference counting similar to how the stdlib's socket implements :meth:`dup`
• Added _sock argument to :class:`socket`'s constructor. Passing the socket instance as first argument is no longer supported.
• Fixed :func:`socket.connect` to ignore WSAEINVAL on Windows.
• Fixed :func:`socket.connect` to use :func:`wait_readwrite` instead of :func:`wait_write`.
• Fixed :func:`socket.connect` to consult SO_ERROR.
• Fixed :func:`socket.send` and :func:`socket.sendall` to support flags argument.
• Renamed :func:`socket_bind_and_listen` to :func:`socket.bind_and_listen`. The old name is still available as a deprecated alias.
• The underlying socket object is now stored as _sock property.
• Imported the constants and some utility functions from stdlib's :mod:`socket` into :mod:`gevent.socket`. (Thanks to Matt Goodall for the original patch).
• Renamed :meth:`wrap_ssl` to :meth:`ssl`. (the old name is still available but deprecated)
• Deprecated :func:`connect_tcp` and :func:`tcp_server`.
• Added :exc:`sslerror` to socket.__all__.
• Removed :class:`GreenSocket` alias for socket class.
• Moved PyOpenSSL-based implementation of :func:`socket.ssl` into :mod:`gevent.oldssl` module. It's imported into :mod:`gevent.socket` if importing :mod:`gevent.ssl` fails.

Miscellaneous:

• Fixed Greenlet.spawn_link* and GreenletSet.spawn_link* classmethods not to assume anything about their arguments. (Thanks to Marcus Cavanaugh for pointing that out).
• Fixed :func:`select <gevent.select.select>` to clean up properly if event creation fails.
• Fixed :func:`select <gevent.select.select>` to raise :exc:`select.error` instead of :exc:`IOError`.
• Fixed setup.py to proceed with compilation even if libevent version cannot be determined. 1.x.x is assumed in this case.
• Fixed compatibility of .pyx files with Cython 0.12.0.
• Renamed arguments for :func:`select.select` to what they are called in the stdlib.
• Removed internal function :func:`getLinkedCompleted` from :mod:`gevent.greenlet`.
• Remove #warning directives from libevent.h. They are not supported by vc90.
• Removed some deprecated stuff from :mod:`coros`.
• Internal class :class:`Waiter <gevent.hub.Waiter>` now stores the value if no one's waiting for it.
• Added testrunner.py script that replaces a bunch of small scripts that were used before.
• Removed is_secure attribute from sockets and ssl objects.
• Made :class:`Greenlet` not to print a traceback when a not-yet-started greenlet is killed.
• Added :class:`BackdoorServer` class to :mod:`backdoor`. Removed :func:`backdoor` function and deprecated :func:`backdoor_server` function.
• Removed __getattr__ from socket class.
• Fixed :func:`monkey.patch_socket` not to fail if :func:`socket.ssl` is not present in :mod:`gevent.socket`.
• Added :func:`monkey.patch_ssl`.
• Added aggressive argument to :func:`monkey.patch_all`.
• Tests from stdlib no longer included in greentest package. Instead, there are number of stubs that import those tests from test package directly and run them in monkey patched environment.
• Added examples/process.py by Marcus Cavanaugh.

Release 0.11.2 (Dec 10, 2009)

• Fixed :mod:`wsgi` to unquote environ['PATH_INFO'] before passing to application.
• Added SERVER_SOFTWARE variable to :mod:`wsgi` environ.
• Fixed bug in :meth:`JoinableQueue.task_done` that caused :class:`ValueError` to be raised incorrectly here.
• Fixed :mod:`gevent.socket` not to fail with :class:`ImportError` if Python was not built with ssl support.

Release 0.11.1 (Nov 15, 2009)

• Fixed bug in :func:`select.select` function. Passing non-empty list of write descriptors used to cause this function to fail.
• Changed setup.py to go ahead with the compilation even if the actual version of libevent cannot be determined (version 1.x.x is assumed in that case).

Contributed by Ludvig Ericson:

• Fixed :mod:`wsgi`'s start_response to recognize exc_info argument.
• Fixed setup.py to look for libevent.dylib rather than .so on Darwin platforms.

Release 0.11.0 (Oct 9, 2009)

• Fixed timeout bug in :func:`joinall`, :meth:`Greenlet.join`, :meth:`pool.Pool.join`: if timeout has expired it used to raise :class:`Timeout`; now it returns silently.
• Fixed :func:`signal` to run the signal handler in a new greenlet; it was run in the :class:`Hub` greenlet before.
• Fixed :meth:`Timeout.start_new`: if passed a :class:`Timeout` instance, it now calls its :meth:`start <Timeout.start>` method before returning it.
• Fixed :mod:`gevent.monkey` to patch :class:`threading.local` properly.
• Fixed :meth:`Queue.empty` and :meth:`Queue.full` to be compatible with the standard :mod:`Queue`. It tried to take into account the greenlets currently blocking on :meth:`get <Queue.get>`/:meth:`put <Queue.put>` which was not useful and hard to reason about. Now it simply compares :meth:`qsize <Queue.qsize>` to maxsize, which what the standard :mod:`Queue` does too.
• Fixed :class:`Event` to behave exactly like the standard :class:`threading.Event`:
  • :meth:`Event.set` does not accept a parameter anymore; it's now either set or not.
  • Event.get method is gone.
  • Event.set(); Event.clear() used to be a no-op; now it properly wakes up all the waiters.
  • :class:`AsyncResult` behaves exactly like before, but it does not inherit from :class:`Event` anymore and does miss clear() method.
• Renamed internal helpers :meth:`socket.wait_reader`/:meth:`socket.wait_writer` to :meth:`socket.wait_read`/:meth:`socket.wait_write`.
• Renamed :class:`gevent.socket.GreenSocket` to :class:`gevent.socket.socket`. GreenSocket is still available as an alias but will be removed in the future.
• :mod:`gevent.core` now includes wrappers for evbuffer, evdns, evhttp.
• Renamed the old gevent.wsgi to :mod:`gevent.pywsgi`.
• Added a new HTTP server :mod:`gevent.http` module based on libevent-http wrappers.
• Added a new WSGI server :mod:`gevent.wsgi` module based on :mod:`gevent.http`.
• Added evdns wrappers to :mod:`gevent.core` and DNS functions to :mod:`gevent.socket` module. Contributed by Jason Toffaletti..
• Added a few a few options to setup.py to select a libevent library to compile against. Check them out with setup.py -h.
• Added __all__ to many modules that missed it.
• Converted the docstrings and the changelog to sphinx/rst markup.
• Added sphinx/rst documentation. It is available online at http://www.gevent.org.

Release 0.10.0 (Aug 26, 2009)

• Changed :class:`Timeout` API in a backward-incompatible way: :meth:`Timeout.__init__` does not start the timer immediately anymore; :meth:`Timeout.start` must be called explicitly. A shortcut - :meth:`Timeout.start_new` - is provided that creates and starts a :class:`Timeout`.

• Added :class:`gevent.Greenlet` class which is a subclass of greenlet that adds a few useful methods :meth:`join <Greenlet.join>`/:meth:`get <Greenlet.get>`/:meth:`kill <Greenlet.kill>`/:meth:`link <Greenlet.link>`.

• :func:`spawn` now returns :class:`Greenlet` instance. The old spawn, which returns py.magic.greenlet instance, can be still accessed as :meth:`spawn_raw`.

  Note

  The implementation of :class:`Greenlet` is an improvement on proc module, with these bugs fixed:

  • Proc was not a subclass of greenlet which makes :func:`getcurrent` useless and using Procs as keys in dict impossible.
  • Proc executes links sequentially, so one could block the rest from being executed. :class:`Greenlet` executes each link in a new greenlet by default, unless it is set up with :class:`Greenlet.rawlink` method.
  • Proc cannot be easily subclassed. To subclass :class:`Greenlet`, override its _run and __init__ methods.

• Added :class:`pool.Pool` class with the methods compatible to the standard :mod:`multiprocessing.pool`: :meth:`apply <Pool.apply>`, :meth:`map <Pool.map>` and others. It also has :meth:`spawn <Pool.spawn>` method which is always async and returns a :class:`Greenlet` instance.

• Added :mod:`gevent.event` module with 2 classes: :class:`Event` and :class:`AsyncResult`. :class:`Event` is a drop-in replacement for :class:`threading.Event`, supporting :meth:`set <Event.set>`/:meth:`wait <Event.wait>`/get methods. :class:`AsyncResult` is an extension of :class:`Event` that supports exception passing via :meth:`set_exception <AsyncResult.set_exception>` method.

• Added :class:`queue.JoinableQueue` class with :meth:`task_done <queue.JoinableQueue.task_done>` and :meth:`join <queue.JoinableQueue.join>` methods.

• Renamed core.read and core.write classes to :class:`core.read_event` and :class:`core.write_event`.

• :mod:`gevent.pywsgi`: pulled Mike Barton's eventlet patches that fix double content-length issue.

• Fixed setup.py to search more places for system libevent installation. This fixes 64bit CentOS 5.3 installation issues, hopefully covers other platforms as well.

The following items were added to the gevent top level package:

• :func:`spawn_link`
• :func:`spawn_link_value`
• :func:`spawn_link_exception`
• :func:`spawn_raw`
• :func:`joinall`
• :func:`killall`
• :class:`Greenlet`
• :exc:`GreenletExit`
• :mod:`core`

The following items were marked as deprecated:

• gevent.proc module (:class:`wrap_errors` helper was moved to :mod:`util` module)
• gevent.coros.event
• gevent.coros.Queue and gevent.coros.Channel

Internally, gevent.greenlet was split into a number of modules:

• :mod:`gevent.hub` provides :class:`Hub` class and basic utilities, like :func:`sleep`; :class:`Hub` is now a subclass of greenlet.
• :mod:`gevent.timeout` provides :class:`Timeout` and :func:`with_timeout`;
• :mod:`gevent.greenlet` provides :class:`Greenlet` class and helpers like :func:`joinall` and :func:`killall`.
• :mod:`gevent.rawgreenlet` contains the old "polling" versions of :func:`joinall <rawgreenlet.joinall>` and :func:`killall <rawgreenlet.killall>` (they do not need :meth:`link <Greenlet.link>` functionality and work with any greenlet by polling their status and sleeping in a loop)

Thanks to Jason Toffaletti for reporting the installation issue and providing a test case for WSGI double content-length header bug.

Release 0.9.3 (Aug 3, 2009)

• Fixed all known bugs in the :mod:`gevent.queue` module and made it 2.4-compatible. :class:`LifoQueue` and :class:`PriorityQueue` are implemented as well. :mod:`gevent.queue` will deprecate both coros.Queue and coros.Channel.
• Fixed :class:`Timeout` to raise itself by default. TimeoutError is gone. Silent timeout is now created by passing False instead of None.
• Fixed bug in :func:`gevent.select.select` where it could silent the wrong timeout.
• :func:`spawn` and :func:`spawn_later` now avoid creating a closure and this decreases spawning time by 50%.
• kill's and killall's wait argument was renamed to block. The polling is now implemented by greenlet.join and greenlet.joinall functions and it become more responsive, with gradual increase of sleep time.
• Renamed proc.RunningProcSet to proc.ProcSet.
• Added :func:`shutdown` function, which blocks until libevent has finished dispatching the events.
• The return value of event_add and event_del in core.pyx are now checked properly and :exc:`IOError` is raised if they have failed.
• Fixed backdoor.py, accidentally broken in the previous release.

Release 0.9.2 (Jul 20, 2009)

• Simplified :mod:`gevent.socket`'s implementation and fixed SSL bug reported on eventletdev by Cesar Alaniz as well as failures in test_socket_ssl.py.
• Removed GreenSocket.makeGreenFile; Use :meth:`socket.socket.makefile` that returns :class:`_fileobject` and is available on both :class:`GreenSocket <gevent.socket.socket>` and :class:`GreenSSL <gevent.socket.GreenSSL>`. The :mod:`gevent.socket` is still a work in progress.
• Added new :class:`core.active_event` class that takes advantage of libevent's event_active function. core.active_event(func) schedules func to be run in this event loop iteration as opposed to core.timer(0, ...) which schedules an event to be run in the next iteration. :class:`active_event` is now used throughout the library wherever core.timer(0, ....) was previously used. This results in :func:`spawn` being at least 20% faster compared to release 0.9.1 and twice as fast compared to eventlet. (The results are obtained with bench_spawn.py script in greentest/ directory)
• Added boolean parameter wait to :func:`kill` and :func:`killall` functions. If set to True, it makes the function block until the greenlet(s) is actually dead. By default, :func:`kill` and :func:`killall` are asynchronous, i.e. they don't unschedule the current greenlet.
• Added a few new properties to :class:`gevent.core.event`: :attr:`fd <event.fd>`, :attr:`events <event.events>`, :attr:`events_str <event.events_str>` and :attr:`flags <event.flags>`. It also has :meth:`__enter__ <event.__enter__>` and :meth:`__exit__ <event.__exit__>` now, so it can be used as a context manager. :class:`event`'s :attr:`callback <event.callback>` signature has changed from (event, fd, evtype) to (event, evtype).
• Fixed :class:`Hub`'s mainloop to never return successfully as this will screw up main greenlet's switch() call. Instead of returning it raises :class:`DispatchExit`.
• Added :func:`reinit` function - wrapper for libevent's event_reinit. This function is a must have at least for daemons, as it fixes epoll and some others eventloops to work after fork.
• Trying to use gevent in another thread will now raise an exception immediately, since it's not implemented.
• Added a few more convenience methods spawn_link[exception/value] to proc.RunningProcSet.
• Fixed setup.py not to depend on setuptools.
• Removed gevent.timeout. Use :class:`gevent.Timeout`.

Release 0.9.1 (Jul 9, 2009)

• Fixed compilation with libevent-1.3. Thanks to Litao Wei for reporting the problem.
• Fixed :class:`Hub` to recover silently after event_dispatch() failures (I've seen this happen after fork even though event_reinit() is called as necessary). The end result is that :func:`fork` now works more reliably, as detected by test_socketserver.py - it used to fail occasionally, now it does not.
• Reorganized the package, most of the stuff from gevent/__init__.py was moved to gevent/greenlet.py. gevent/__init__.py imports some of it back but not everything.
• Renamed gevent.timeout to :class:`gevent.Timeout`. The old name is available as an alias.
• Fixed a few bugs in :class:`queue.Queue`. Added test_queue.py from standard tests to check how good is :class:`queue.Queue` a replacement for a standard :mod:`Queue` (not good at all, timeouts in :meth:`queue.Queue.put` don't work yet)
• :mod:`monkey` now patches ssl module when on 2.6 (very limited support).
• Improved compatibility with Python 2.6 and Python 2.4.
• Greenlet installed from PyPI (without py.magic prefix) is properly recognized now.
• core.pyx was accidentally left out of the source package, it's included now.
• :class:`GreenSocket <socket.socket>` now wraps a socket object from _socket module rather than from :mod:`socket`.

Release 0.9.0 (Jul 8, 2009)

Started as eventlet 0.8.11 fork, with the intention to support only libevent as a backend. Compared to eventlet, this version has a much simpler API and implementation and a few severe bugs fixed, namely

• Full duplex in sockets, i.e. read() and write() on the same fd do not cancel one another.
• The :meth:`GreenSocket.close <socket.socket.close>` method does not hang as it could with eventlet.

There's a test in my repo of eventlet that reproduces both of them: http://bitbucket.org/denis/eventlet/src/tip/greentest/test__socket.py

Besides having less bugs and less code to care about the goals of the fork are:

• Piggy-back on libevent as much as possible (use its http and dns code).
• Use the interfaces and conventions from the standard Python library where possible.