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          "saved" variables actually weren't being saved. This has been fixed,
          of course, while increasing performance while losing all the save
          flags.
        - save flags are gone, and all the api functions dealing with them.
	- added Coro::Semaphore::adjust.
        - added Coro::Util::fork_eval.
        - added Coro::Storable::{nfreeze,blocking_{freeze,nfreeze}}.
        - added Coro::killall.
        - reduce initial stack sizes to allow for "micro-coroutines".
        - better async_pool resource management, moved parts of async_pool
          handling to XS (major speed improvement).
        - actually croak before modifying important data structures.
        - refuse to transfer while compiling.
        - possibly support eval EXPR better now.
        - enable assembly per default on linux+bsd x86+amd64.
        - all internal members were renamed _something for easier subclassing.
        - many minor tweaks.

3.63 Wed May 16 14:10:06 CEST 2007
	- implement handcoded assembly for x86/amd64 SVR ABI.

3.62 Fri Apr 27 21:36:06 CEST 2007
	- upgrade libcoro (which might set unwind info correctly).
        - change default on linux to setjmp/longjmp.

3.61 Thu Apr 19 12:36:18 CEST 2007
	- Coro::Storable caused an endless loop when thawing invalid
          pst's sometimes.
	- use a Semaphore in Coro::Storable, as Storable doesn't
          seem to be reentrant (although it is documented to
          be threadsafe...).
        - fix Coro::Signal to bring back the original unreliable
          but stateful semantics.
        - fixed a lot of typos in Coro.pm (patch submitted by David
          Steinbrunner, which applied flawlessly).

3.6  Sat Apr 14 17:13:31 CEST 2007
	- added some bugfixes to get eg/myhttpd working again.
        - added Coro::Storable for often-cede'ing freeze/thaw.
        - try to do a clean exit when a coroutine calls exit
          (EXPERIMENTAL).
        - got rid of indirect call through _coro_init.
        - updated the partly antique examples in eg/ to
          work again and be a bit less magic, too.
        - fixed Coro::Signal semantics to work as documented again.

3.55  Sun Mar 25 01:20:47 CET 2007
	- add SAVE_DEFFH to save the default filehandle and enable
          it by default.
        - finally move socket-operations from Coro::Socket to Coro::Handle
          to be able to unblock foreign sockets.
	- add Coro::State::save_also and guarded_save.
	- add count accessor to Coro::Semaphore.
        - add Coro::State::cctx_stacksize.
        - just for the fun of it, do not rely on implicit context,
          which can dramatically improve performance, but people
          using windows-process-emulation perls do not care much about
          performance.

3.51  Sun Mar  4 14:18:04 CET 2007
	- fixed a problem when you weakened references to Coro::State's
          (patch by Yuval Kogman).

3.501 Wed Feb 28 12:44:07 CET 2007
	- rename some global symbols as macosx from hell redefines
          them without asking.

3.5 Tue Feb 13 20:22:53 CET 2007
	- do AnyEvent model detection earlier, avoiding problems
          caused by first using AnyEvent and later Coro::Event.
        - implement and document Coro::Event event objects.
        - fix a potential problem in Coro::Event causing crashes.
        - initialise PL_comppad when creating a new coroutine,
          avoids crashes on early coro destruction.

3.41 Mon Jan 22 19:19:49 CET 2007
	- readline on Coro::Handle did not support undefined $/,
          nor did it deliver partial lines on EOF or error.
        - implement malloc fallback for stack allocation because
          stupid broken idiotic OSX has a stupid broken
          idiotic fits-the-whole-os mmap "implementation" and
          my dick feels longer if Coro is portable even to
          obsolete platforms.

3.4  Fri Jan 19 21:52:54 CET 2007
	- remove t/09_timer.t, as it isn't really testing much
          but was rather flaky in practise.
        - async_pool coro would keep arguments and callback alive until
          it was reused.
        - cancellation of a coroutine could cause spurious idle calls
          in cede_notself.

3.3  Sat Jan  6 03:45:00 CET 2007
	- implement $coro->on_destroy.
        - Coro::Event blocking semantics have been changed,
          documented and - hopefully - improved.
	- fix nice adding, not subtracting, from priority.
        - fix ->prio and api_is_ready (patch by Mark Hinds).
        - fixed an assert ("... == prev__cctx->idle_te")
          that could errronously trigger.
        - fix various large and small memleaks.
        - use a (hopefully) more stable cancel implementation
          that immediately frees the coroutine data.
        - cede/cede_notself return a status now.
        - added Coro::guard function.
        - added a global coroutine pool for jobs (on my machine,
          I can create and execute 48k simple coros/s with async,
          and 128k coros with async_pool).
        - Coro::AIO now uses the coroutine priority as io priority.

3.2  Fri Dec 22 05:07:09 CET 2006
	- improve portability to slightly older perls.
        - use cleaner coroutine destruction.
        - simplify configuration for users.
        - optionally (unrecommended) prefer perl functions over
          their coro replacements.

3.11 Tue Dec  5 13:11:24 CET 2006
        - fixed some bogus assert's, but as perl.h disables assert even
          without NDEBUG (thank you very much), not too many people should
          notice (that did include myself). Andreas König noticed, though :)