[ViewVC] Annotation of: cvs/EV/Changes

Revision history for Perl extension EV

Changes marked with (libev) are changes in libev, and have more
documentation in the libev Changes file.

4.10 Thu Jan 19 18:54:23 CET 2012
        - (libev) fix a race where the workaround against the epoll fork
          bugs caused signals to not be handled anymore.
        - (libev) correct backend_fudge for most backends, and implement
          a windows specific workaround to avoid looping because we call
          both select and Sleep, both with different time resolutions.
        - e_new wasn't declared static (causing very minor .so bloat).
        - replace more old api names by new ones.

4.03 Tue Jan 11 14:51:05 CET 2011
        - do not avoid the clock_gettime call on GNU/Linux anymore, as EV
          links against -lpthread anyways - as a result, EV might now take
          advantage of fast userspace clock_gettime implementations,
          but also links against -lrt.
        - (libev) lots of event port bug workarounds.
        - (libev) officially support files in I/O watchers.
        - (libev) new function ev_feed_signal.
        - fix documentation parts still refering to the 3.x API.

4.02 Thu Dec 30 08:27:41 CET 2010
        - the revents argument did not stringify correctly, as only the
          numeric value was updated, while the string value was kept from
          previous invocations.

4.01 Sun Dec  5 12:42:13 CET 2010
        - fully support EV_COMPAT3=0.
        - default_fork was stupidly defined as inline.
        - ask cpan to upgrade AnyEvent if < 5.29.
        - support EV_EXTRA_DEFS during configuration.
        - support -DEV_NO_LOOPS for snakker build.

4.00 Mon Oct 25 13:30:09 CEST 2010
        - many API changes, see the manual.
        - (libev) lots and lots of bugfixes, see the ev documentation.
        - fix a bug where inotify usage would parse the same event
          multiple times, causing various forms of breakage.
        - greatly reduce stack usage for inotify (8kb to <0.5kb).
        - expose ev_depth and ev_verify via the XS API.
        - implement ev_cleanup watchers.
        - (libev) ev_embed_stop did not correctly stop the watcher.
        - (libev) disable poll backend on AIX.
        - (libev) rename EV_TIMEOUT to EV_TIMER.
        - (libev) add section on accept() problems to the manpage.
        - (libev) no child watchers on win32.
        - make code more aliasing compliant, in case perl is ever
          translated to C.
        - document the EV::CHECK runtime unavailability.
        - ported to minix 3.1.7.

3.9  Thu Dec 31 07:59:59 CET 2009
        - disable t/07* under automatic testing.
        - increase t/09* timeouts as netbsd has *horribly* broken
          select/kevent that *usually* sleep >>0.6s instead of 0.3.
        - add constants EV::FLAG_NOSIGFD, EV::FLAG_NOINOTIFY and
          EV::BACKEND_ALL.
        - (libev) signalfd is no longer used by default.
        - (libev) backport inotify code to C89.
        - (libev) inotify file descriptors could leak into child processes.
        - (libev) ev_stat watchers could keep an errornous extra ref on the loop.
        - (libev) take advantage of inotify_init1, if available.
        - (libev) the signal handling pipe wasn't always initialised under windows.
        - changed minimum glibc requirement from glibc 2.9 to 2.7, for signalfd.
        - (libev) only replace ev_stat.prev when we detect an actual difference.

3.8  Sun Aug  9 15:30:10 CEST 2009
        - implement $loop->signal/signal_ns.
        - (libev) incompatible change: do not necessarily reset signal
          handler to SIG_DFL when a sighandler is stopped.
        - (libev) ev_default_destroy did not properly free or zero some
          members, potentially causing crashes and memory corruption on
          repated ev_default_destroy/ev_default_loop calls.
        - (libev) take advantage of signalfd on GNU/Linux systems.
        - (libev) document that the signal mask might be in an unspecified
          state when using libev's signal handling.
        - (libev) take advantage of some GNU/Linux calls to set
          cloexec/nonblock on fd creation, to avoid race conditions.
        - implement internal glue code to interface more efficiently
          with AnyEvent.

3.7  Fri Jul 17 16:49:16 CEST 2009
        - add EV::loop_verify and EV::loop_depth.
        - use output filehandle for i/o watchers waiting
          for EV_WRITE, otherwise input filehandle.
        - use common schmorp.h header.
        - add EV::Timer->remaining.
        - allow for subclassing of EV::Loop (see the exciting
          EV::Loop::Async module for an example).
        - added EV::invoke_pending and EV::pending_count.

        - (libev) ev_unloop and ev_loop wrongly used a global variable to
          exit loops, instead of using a per-loop variable.
        - (libev) the ev_set_io_collect_interval interpretation has changed.
        - add new functionality: EV::invoke_pending, EV::pending_count.
        - add $timer->remaining.
        - add EV::loop_depth.
        - (libev) calling unloop in fork/prepare watchers will no longer poll
          for new events.
        - (libev) use GetSystemTimeAsFileTime instead of _timeb on windows,
          for slightly higher accuracy.
        - (libev) actually 0-initialise struct sigaction when installing
          signals.

3.6  Tue Apr 28 02:50:37 CEST 2009
        - keepalive(0) could decrease the refcount of the loop
          permanently.
        - add ev_suspend/ev_resume, also make ev_now_update
          accessible via the XS API.
        - most EV::<eventtype> constants were missing and have been
          added :/.
        - add EV::VERSION_MAJOR/VERSION_MINOR constants.
        - (libev) multiple timers becoming ready within an event loop
          iteration will be invoked in the "correct" order now.
        - (libev) do not leave the event loop early just because we have
          no active watchers, fixing a problem when embedding a kqueue
          loop that has active kernel events but no registered watchers
          (reported by blacksand blacksand).
        - (libev) correctly zero the idx values for arrays, so destroying
          and reinitialising the default loop actually works (patch by
          Malek Hadj-Ali).
        - (libev) new EV::CUSTOM revents flag for use by applications.
        - (libev) add documentation section about priorites.
        - (libev) add a glossary to the dcoumentation.
        - (libev) extend the ev_fork description slightly.
        - (libev) optimize a jump out of call_pending.
        - t/03_keepalive could fail when there was no actual error.

3.53 Sun Feb 15 02:38:20 CET 2009
        - (libev) on win32, the event loop creation could randomly fail
          due to an initialised variable having the wrong value.
        - (libev) probe for CLOCK_REALTIME support at runtime as well and
          fall back to gettimeofday if there is an error, to support older
          operating systems with newer header files/libraries.
        - prefer gettimeofday over clock_gettime by default.

3.52 Wed Jan  7 21:46:14 CET 2009
        - (libev) fix some issues in the select backend when in fd_set mode.
        - (libev) due to a thinko, instead of disabling everything but
          select on the borked OS X platform, everything but select was
          allowed (reported by Emanuele Giaquinta).
        - (libev) actually verify that local and remote port are matching in
          libev's socketpair emulation, which makes denial-of-service
          attacks harder (but not impossible - it's windows). Make sure
          it even works under vista, which thinks that getpeer/sockname
          should return fantasy port numbers.

3.51 Wed Dec 24 23:01:59 CET 2008
        - do not cache the arguments passed to callbacks if the refcount
          indicates that the callback has stolen them.
        - (libev) try to avoid librt on GNU/Linux.
        - (libev) check port_getn return value dfferently, might potentially
          avoid problems.
        - (libev) fix a bug with stat watchers possibly causing freezes.
        - (libev) work around OS X 10.5 breaking poll, now select is the
          only viable choice left on that pile of garbage.
        - play tester whore: disable some tests that typically fail only
          on cpan tester machines.

3.49 Wed Nov 19 11:26:53 CET 2008
        - fix typos in manpage (Alex Efros).
        - increase timing even further, for the ever-overloaded cpan-tester
          machines, and to the detriment of everybody else who wants a fast
          make test.
        - possible 5.6 compatibility.
        - (libev) use inotify even on buggy kernels, but don't rely on it.
        - (libev) use inotify only as an added hint on network filesystems.

3.48 Thu Oct 30 09:09:48 CET 2008
        - (libev) use a generation counter to detect spurious epoll events
          and recreate the kernel in such a case (sorry, it's slow, but
          I didn't design epoll...).
        - (libev) optimise away an EPOLL_CTL_ADD/MOD combo in the epoll
          backend in some cases.
        - (libev) use memset to initialise most arrays now and do away
          with the init functions.
        - speed up event callback invocation further (~15%), by
          not creating the object reference each time.
        - EV::sleep was documented, but not implemented. fun.

3.45 Tue Oct 21 22:20:39 CEST 2008
        - (libev) disable inotify usage on linux <2.6.25 (kernel bug).
        - (libev) ev_embed will now automatically follow fork.
        - (libev) ev_once will now pass both io and timeout events to
          the callback when both happen concurrently, instead of giving
          one precedence.
        - install C library documentation as EV::libev manpage (sorry, oesi).
        - (libev) fix a minor performance bug in ev_stat handling.

3.44 Mon Sep 29 05:16:31 CEST 2008
        - (libev) add EV::now_update and $loop->now_update.

3.431 Sun Jul 13 00:19:02 CEST 2008
        - made the EV::embed callback optional again. reported by
          Vladimir Timofeev.

3.43 Tue Jul  8 20:56:31 CEST 2008
        - disabled warnings in EV.pm, the CHECK issue is now understood
          and harmless.

3.42 Mon May 26 07:36:46 CEST 2008
        - (libev) work around another bug in windows perls and
           windows itself: failed connects do NOT set read or write
           flags in select, but this version of libev will.

3.41 Thu May 22 01:39:40 CEST 2008
        - (libev) fix many heap-related bugs (timers, periodics).
        - (libev) improve timing stability of timers and periodics.
        - expose ev_loop_verify to perl code.
        - clarify documentation for periodic reschedule callbacks.
        - verify that the passed callback argument is indeed a code
          reference, for earlier error reporting and a nice calling
          speed increase (as well as saving memory).

3.4  Tue May 20 21:51:55 CEST 2008
        - (libev) work around both a windows bug and a bug in perl's
          select on windows when not waiting for any file descriptors.
        - bundle ev.pod into the tarball, just to increase its size
          (and for the poor internetless person).
          
3.33 Sun May 18 12:43:04 CEST 2008
        - (libev) use numerous enhancements such as a more
          cache-friendly 4-heap and heap index caching for timers.
        - remove undocumented ev_timer->at accessor.

3.31 Wed Apr 16 20:48:59 CEST 2008
        - (libev) post-last-minute fix for ev_poll.c problem.

3.3  Wed Apr 16 19:04:47 CEST 2008
        - (libev) linux eventfd support.
        - (libev) inline more with C99 compilers.
        - (libev) work around a number of bugs in valgrind.
        - (libev) work around broken realloc on openbsd and darwin.
        - added example to EV::MakeMaker manpage.
        - add async_pending method.

3.2  Wed Apr  2 17:08:16 CEST 2008
        - "ported" again to the Microsoft "C" language.
        - relax testsuite timing for the benefit of freebsd users once more.
        - fix EVAPI's ev_time and ev_sleep macros.
        - (libev) fix select backend on 64 bit architetcures.
        - (libev) ev_loop flags are now local to each invocation.

3.1  Sat Mar  8 11:41:14 CET 2008
        - add ev_sync_* and ev_fork_* to EVAPI.h.
        - provide EV::Embed->sweep method.
        - new watcher type: async (not very useful in perl).

3.0  Mon Jan 28 13:23:11 CET 2008
        - upgrade to libev-3.0.
        - change child handler to incorporate tracing flag.

2.01 Mon Dec 31 01:59:19 CET 2007
        - found a minor problem in the testsuite that is only
          caught by new Test::Harness versions (reported by Andreas
          König).

2.0  Sat Dec 22 17:47:03 CET 2007
        - no longer force kqueue when enabled, enable it
          on more systems (as its now by default not used on most).
        - expose fork watchers.
        - switch to libev's MULTIPLICITY API.
        - use a slightly different include file name strategy.
        - get rid of (unused) libevent emulation.
        - 5% watcher management speedup due to callback optimisation
          when inline closures are used, 5% slowdown due to multiplicity.
        - very minimal support for dynamic event loops and embed watchers.
        - fix name of prepare start/stop methods.
        - create and export EV::sleep and EV::set_*_collect_interval.
        - fix typos in manpage (Alex Efros).

1.86 Tue Dec 18 02:36:57 CET 2007
        - add periodic->at methods.

1.85 Fri Dec 14 20:32:40 CET 2007
        - further optimise epoll backend by adding a heuristic that
          avoids EPOLL_CTL_DEL calls if possible.
        - EV::signal->start was not async-signal safe.
        - optimise start/stop when the fd hasn't changed.

1.8  Tue Dec 11 22:17:46 CET 2007
        - API version 3:0.
        - reduced fudge factor to zero for select, poll, epoll
          and kqueue: your system better be posix-compliant
          even in its extensions :->
        - improve long-term numerical stability in periodic watchers
          by introducing a separate offset value instead of reusing at.
        - recalculate real/monotonic clocks before blocking fully
          to avoid blocking for longer than necessary.
        - fix bugs in the heap functions. this rarely lead to illegal
          heap orderings.

1.72 Sat Dec  8 15:31:26 CET 2007
        - add dummy loop arguments to some EVAPI functions
          so that clients can use EV_A and EV_DEFAULT.
        - expose ev_clear_pending.
        - renamed trigger to invoke.

1.71 Fri Dec  7 19:10:24 CET 2007
        - changed/implemented idle watcher priority.
        - allow out-of-range priorities to be set.
        - fix ->priority to actually work on started watchers.
        - improved testsuite.

1.6  Wed Dec  5 15:06:20 CET 2007
        - add a missing SPAGAIN.
        - ripped out EV::DNS, use EV::ADNS for a better backend.
        - make ev_time callable from EVAPI.h.
        - add EV::loop_count.
        - some space optimisations.

1.5  Wed Nov 28 20:19:09 CET 2007
        - add inotify backend.
        - make testsuite even less sensible to timing issues,
          add more stat tests.
        - add ->attr, ->prev, ->stat calls to stat watcher.

1.4  Tue Nov 27 17:35:27 CET 2007
        - work around a linux 2.4 kernel bug in child handlers.
        - implement stat watcher interface.
        - implement fork watcher interface.
        - io->set did not keep the fh alive.
        - actively check signal numbers/names to be valid.
        - cleanups, minor fixes, new bugs.
        - work around windows bugs in the testsuite.

1.3  Sun Nov 25 10:46:57 CET 2007
        - stopping idle/check/prepare watchers could cause data corruption.
        - implement and document EV::once.
        - improved documentation, verify that netbsd indeed has the only
          working kqueue implementation (out of darwin, freebsd, netbsd and
          openbsd). Praise them!
        - fix the data method so it might work.
        - expose ev_ref/ev_unref to the C API.
        - expose ref/unref in form of the ->keepalive method to perl.
        - minor bugfixes and portability fixes.

1.2  Thu Nov 22 05:44:09 CET 2007
        - disable kqueue by default on !netbsd, as its broken on freebsd,
          darwin and openbsd and thus almost everywhere.
        - add some allowance in t/01_timer.t for the uneven monotonic
          vs. realtime clock tick on at least freebsd.
        - add -lsocket -lnsl on solaris in case the perl guy forgot to
          configure them.

1.1  Wed Nov 21 06:08:48 CET 2007
        - improved timer test to include periodics and
          withstand small timing variations.
        - many minor tweaks to libev.

1.0  Fri Nov 16 14:51:59 CET 2007
        - require AnyEvent update if AnyEvent is installed.
        - add solaris 10 port-based backend.
        - add child_ns and fix check_ns.
        - treat yes/no as enforcement, not as hint, when configuring,
          documentation update (reported by Andy Grundman).

0.9  Wed Nov 14 22:24:49 CET 2007
        - changed LIBEV_METHODS to LIBEV_FLAGS and the
          way this is used inside libev.
        - many, many bugfixes.
        - add unloop constants.
        - add timer test.
        - ev_loop will now terminate immediately when no watchers are active.

0.8  Mon Nov 12 02:28:46 CET 2007
        - fix "testsuite" again :().
        - fix check/idle/prepare/child watcher stop.
        - enourmously many fixes.
        - rewritten select backend (mostly for win32).
        - cache socket handles on win32.
        - provide considerably finer control over configuration.

0.7  Fri Nov  9 20:37:58 CET 2007
        - move AnyEvent adaptor into the AnyEvent module.
        - use private copy of evdns.[ch].
        - many minor fixes.

0.6  Thu Nov  8 18:23:43 CET 2007
        - (libev) better native win32 support.
        - fix idle watchers.
        - implement and document periodic reschedule callbacks.
        - do not run dns test on !linux platforms (actually to exclude win32).
        - fix (unused in EV :) poll backend.

0.51 Tue Nov  6 19:50:22 CET 2007
        - fix kqueue/poll compilation issue.
        - work around design issues in kqueue.
        - enable kqueue by default, seems to work.

0.5  Tue Nov  6 17:37:44 CET 2007
        - add signal and pid mutators.
        - add rstatus/rpid accessors.
        - updated libev (lower cost for clock monotonic).
        - support event priorities.
        - try to find SIG_SIZE on perls that don't have it (Slaven Rezic).
        - improved signal handling, fixed child watchers.
        - experimentally add kqueue backend, completely untested.
        - ported to cygwin and native win32.

0.1   Thu Nov  1 18:29:22 CET 2007
        - replaced libevent by libev (total rewrite).
        - many bugfixes w.r.t. libevent.
        - new watcher types: periodic, check, prepare, child, idle.
        - performance optimisations.
        - added interactive configuration.
        - added fork support.

0.03  Mon Oct 29 20:52:50 CET 2007
        - add timed_io convenience constructors.
        - improve documentation.
        - support signal names in addition to signal numbers.
        - support signal anyevent watchers.
        - vastly improved testsuite (its all relative :).
        - add EV::MakeMaker, beginning of C-level API.
        - force strings to byte form.

0.02  Sun Oct 28 07:40:21 CET 2007
        - call $EV::DIED in case a callback throws an exception.
        - add const char * to typemap for possible 5.6 compatibility.

0.01  Sat Oct 27 19:10:18 CEST 2007
        - initial release.

0.00  Fri Oct 26 11:12:57 CEST 2007
        - original version; cloned from JSON::XS

Revision:	1.209
Committed:	Thu Jan 19 17:55:23 2012 UTC (12 years, 3 months ago) by root
Branch:	MAIN
CVS Tags:	EV_rel-4_10
Changes since 1.208:	+6 -0 lines
Log Message:	4.10
#	User	Rev	Content
1	root	1.143	Revision history for Perl extension EV
2	root	1.1
3	root	1.185	Changes marked with (libev) are changes in libev, and have more
4			documentation in the libev Changes file.
5
6	root	1.209	4.10 Thu Jan 19 18:54:23 CET 2012
7			- (libev) fix a race where the workaround against the epoll fork
8			bugs caused signals to not be handled anymore.
9			- (libev) correct backend_fudge for most backends, and implement
10			a windows specific workaround to avoid looping because we call
11			both select and Sleep, both with different time resolutions.
12	root	1.207	- e_new wasn't declared static (causing very minor .so bloat).
13	root	1.208	- replace more old api names by new ones.
14	root	1.206
15	root	1.205	4.03 Tue Jan 11 14:51:05 CET 2011
16	root	1.203	- do not avoid the clock_gettime call on GNU/Linux anymore, as EV
17			links against -lpthread anyways - as a result, EV might now take
18			advantage of fast userspace clock_gettime implementations,
19			but also links against -lrt.
20	root	1.204	- (libev) lots of event port bug workarounds.
21			- (libev) officially support files in I/O watchers.
22			- (libev) new function ev_feed_signal.
23			- fix documentation parts still refering to the 3.x API.
24	root	1.203
25	root	1.202	4.02 Thu Dec 30 08:27:41 CET 2010
26			- the revents argument did not stringify correctly, as only the
27			numeric value was updated, while the string value was kept from
28			previous invocations.
29
30	root	1.201	4.01 Sun Dec 5 12:42:13 CET 2010
31	root	1.197	- fully support EV_COMPAT3=0.
32	root	1.198	- default_fork was stupidly defined as inline.
33	root	1.199	- ask cpan to upgrade AnyEvent if < 5.29.
34	root	1.200	- support EV_EXTRA_DEFS during configuration.
35	root	1.201	- support -DEV_NO_LOOPS for snakker build.
36	root	1.197
37	root	1.196	4.00 Mon Oct 25 13:30:09 CEST 2010
38	root	1.194	- many API changes, see the manual.
39	root	1.196	- (libev) lots and lots of bugfixes, see the ev documentation.
40	root	1.187	- fix a bug where inotify usage would parse the same event
41			multiple times, causing various forms of breakage.
42			- greatly reduce stack usage for inotify (8kb to <0.5kb).
43	root	1.189	- expose ev_depth and ev_verify via the XS API.
44	root	1.196	- implement ev_cleanup watchers.
45	root	1.188	- (libev) ev_embed_stop did not correctly stop the watcher.
46			- (libev) disable poll backend on AIX.
47			- (libev) rename EV_TIMEOUT to EV_TIMER.
48			- (libev) add section on accept() problems to the manpage.
49	root	1.191	- (libev) no child watchers on win32.
50	root	1.190	- make code more aliasing compliant, in case perl is ever
51			translated to C.
52	root	1.193	- document the EV::CHECK runtime unavailability.
53	root	1.192	- ported to minix 3.1.7.
54	root	1.187
55	root	1.186	3.9 Thu Dec 31 07:59:59 CET 2009
56	root	1.182	- disable t/07* under automatic testing.
57	root	1.183	- increase t/09* timeouts as netbsd has horribly broken
58			select/kevent that usually sleep >>0.6s instead of 0.3.
59	root	1.184	- add constants EV::FLAG_NOSIGFD, EV::FLAG_NOINOTIFY and
60			EV::BACKEND_ALL.
61	root	1.185	- (libev) signalfd is no longer used by default.
62			- (libev) backport inotify code to C89.
63			- (libev) inotify file descriptors could leak into child processes.
64			- (libev) ev_stat watchers could keep an errornous extra ref on the loop.
65			- (libev) take advantage of inotify_init1, if available.
66			- (libev) the signal handling pipe wasn't always initialised under windows.
67			- changed minimum glibc requirement from glibc 2.9 to 2.7, for signalfd.
68			- (libev) only replace ev_stat.prev when we detect an actual difference.
69	root	1.182
70	root	1.181	3.8 Sun Aug 9 15:30:10 CEST 2009
71	root	1.180	- implement $loop->signal/signal_ns.
72	root	1.181	- (libev) incompatible change: do not necessarily reset signal
73			handler to SIG_DFL when a sighandler is stopped.
74			- (libev) ev_default_destroy did not properly free or zero some
75			members, potentially causing crashes and memory corruption on
76			repated ev_default_destroy/ev_default_loop calls.
77			- (libev) take advantage of signalfd on GNU/Linux systems.
78			- (libev) document that the signal mask might be in an unspecified
79			state when using libev's signal handling.
80			- (libev) take advantage of some GNU/Linux calls to set
81			cloexec/nonblock on fd creation, to avoid race conditions.
82			- implement internal glue code to interface more efficiently
83			with AnyEvent.
84	root	1.180
85	root	1.177	3.7 Fri Jul 17 16:49:16 CEST 2009
86	root	1.171	- add EV::loop_verify and EV::loop_depth.
87	root	1.172	- use output filehandle for i/o watchers waiting
88			for EV_WRITE, otherwise input filehandle.
89			- use common schmorp.h header.
90	root	1.176	- add EV::Timer->remaining.
91	root	1.175	- allow for subclassing of EV::Loop (see the exciting
92			EV::Loop::Async module for an example).
93			- added EV::invoke_pending and EV::pending_count.
94	root	1.171
95	root	1.177	- (libev) ev_unloop and ev_loop wrongly used a global variable to
96			exit loops, instead of using a per-loop variable.
97			- (libev) the ev_set_io_collect_interval interpretation has changed.
98			- add new functionality: EV::invoke_pending, EV::pending_count.
99			- add $timer->remaining.
100			- add EV::loop_depth.
101			- (libev) calling unloop in fork/prepare watchers will no longer poll
102			for new events.
103			- (libev) use GetSystemTimeAsFileTime instead of _timeb on windows,
104			for slightly higher accuracy.
105			- (libev) actually 0-initialise struct sigaction when installing
106			signals.
107
108	root	1.170	3.6 Tue Apr 28 02:50:37 CEST 2009
109	root	1.167	- keepalive(0) could decrease the refcount of the loop
110			permanently.
111	root	1.168	- add ev_suspend/ev_resume, also make ev_now_update
112			accessible via the XS API.
113	root	1.169	- most EV::<eventtype> constants were missing and have been
114			added :/.
115			- add EV::VERSION_MAJOR/VERSION_MINOR constants.
116			- (libev) multiple timers becoming ready within an event loop
117			iteration will be invoked in the "correct" order now.
118			- (libev) do not leave the event loop early just because we have
119			no active watchers, fixing a problem when embedding a kqueue
120			loop that has active kernel events but no registered watchers
121			(reported by blacksand blacksand).
122			- (libev) correctly zero the idx values for arrays, so destroying
123			and reinitialising the default loop actually works (patch by
124			Malek Hadj-Ali).
125			- (libev) new EV::CUSTOM revents flag for use by applications.
126			- (libev) add documentation section about priorites.
127			- (libev) add a glossary to the dcoumentation.
128			- (libev) extend the ev_fork description slightly.
129			- (libev) optimize a jump out of call_pending.
130			- t/03_keepalive could fail when there was no actual error.
131	root	1.167
132	root	1.166	3.53 Sun Feb 15 02:38:20 CET 2009
133			- (libev) on win32, the event loop creation could randomly fail
134			due to an initialised variable having the wrong value.
135	root	1.165	- (libev) probe for CLOCK_REALTIME support at runtime as well and
136			fall back to gettimeofday if there is an error, to support older
137			operating systems with newer header files/libraries.
138			- prefer gettimeofday over clock_gettime by default.
139
140	root	1.164	3.52 Wed Jan 7 21:46:14 CET 2009
141	root	1.163	- (libev) fix some issues in the select backend when in fd_set mode.
142			- (libev) due to a thinko, instead of disabling everything but
143			select on the borked OS X platform, everything but select was
144			allowed (reported by Emanuele Giaquinta).
145			- (libev) actually verify that local and remote port are matching in
146			libev's socketpair emulation, which makes denial-of-service
147			attacks harder (but not impossible - it's windows). Make sure
148			it even works under vista, which thinks that getpeer/sockname
149			should return fantasy port numbers.
150
151	root	1.162	3.51 Wed Dec 24 23:01:59 CET 2008
152	root	1.161	- do not cache the arguments passed to callbacks if the refcount
153			indicates that the callback has stolen them.
154	root	1.159	- (libev) try to avoid librt on GNU/Linux.
155	root	1.160	- (libev) check port_getn return value dfferently, might potentially
156			avoid problems.
157	root	1.162	- (libev) fix a bug with stat watchers possibly causing freezes.
158			- (libev) work around OS X 10.5 breaking poll, now select is the
159			only viable choice left on that pile of garbage.
160	root	1.161	- play tester whore: disable some tests that typically fail only
161			on cpan tester machines.
162	root	1.159
163	root	1.158	3.49 Wed Nov 19 11:26:53 CET 2008
164	root	1.155	- fix typos in manpage (Alex Efros).
165	root	1.156	- increase timing even further, for the ever-overloaded cpan-tester
166			machines, and to the detriment of everybody else who wants a fast
167			make test.
168	root	1.157	- possible 5.6 compatibility.
169	root	1.158	- (libev) use inotify even on buggy kernels, but don't rely on it.
170			- (libev) use inotify only as an added hint on network filesystems.
171	root	1.155
172	root	1.154	3.48 Thu Oct 30 09:09:48 CET 2008
173	root	1.152	- (libev) use a generation counter to detect spurious epoll events
174	root	1.151	and recreate the kernel in such a case (sorry, it's slow, but
175			I didn't design epoll...).
176	root	1.150	- (libev) optimise away an EPOLL_CTL_ADD/MOD combo in the epoll
177			backend in some cases.
178			- (libev) use memset to initialise most arrays now and do away
179			with the init functions.
180	root	1.152	- speed up event callback invocation further (~15%), by
181	root	1.151	not creating the object reference each time.
182	root	1.153	- EV::sleep was documented, but not implemented. fun.
183	root	1.150
184			3.45 Tue Oct 21 22:20:39 CEST 2008
185			- (libev) disable inotify usage on linux <2.6.25 (kernel bug).
186	root	1.146	- (libev) ev_embed will now automatically follow fork.
187			- (libev) ev_once will now pass both io and timeout events to
188			the callback when both happen concurrently, instead of giving
189			one precedence.
190	root	1.149	- install C library documentation as EV::libev manpage (sorry, oesi).
191	root	1.150	- (libev) fix a minor performance bug in ev_stat handling.
192	root	1.146
193	root	1.145	3.44 Mon Sep 29 05:16:31 CEST 2008
194	root	1.144	- (libev) add EV::now_update and $loop->now_update.
195
196	root	1.142	3.431 Sun Jul 13 00:19:02 CEST 2008
197			- made the EV::embed callback optional again. reported by
198			Vladimir Timofeev.
199
200	root	1.141	3.43 Tue Jul 8 20:56:31 CEST 2008
201	root	1.140	- disabled warnings in EV.pm, the CHECK issue is now understood
202			and harmless.
203
204	root	1.139	3.42 Mon May 26 07:36:46 CEST 2008
205	root	1.138	- (libev) work around another bug in windows perls and
206			windows itself: failed connects do NOT set read or write
207			flags in select, but this version of libev will.
208
209	root	1.136	3.41 Thu May 22 01:39:40 CEST 2008
210	root	1.135	- (libev) fix many heap-related bugs (timers, periodics).
211	root	1.134	- (libev) improve timing stability of timers and periodics.
212	root	1.137	- expose ev_loop_verify to perl code.
213	root	1.134	- clarify documentation for periodic reschedule callbacks.
214			- verify that the passed callback argument is indeed a code
215			reference, for earlier error reporting and a nice calling
216			speed increase (as well as saving memory).
217
218	root	1.133	3.4 Tue May 20 21:51:55 CEST 2008
219	root	1.132	- (libev) work around both a windows bug and a bug in perl's
220			select on windows when not waiting for any file descriptors.
221	root	1.131	- bundle ev.pod into the tarball, just to increase its size
222			(and for the poor internetless person).
223
224	root	1.130	3.33 Sun May 18 12:43:04 CEST 2008
225			- (libev) use numerous enhancements such as a more
226			cache-friendly 4-heap and heap index caching for timers.
227			- remove undocumented ev_timer->at accessor.
228
229	root	1.129	3.31 Wed Apr 16 20:48:59 CEST 2008
230			- (libev) post-last-minute fix for ev_poll.c problem.
231
232	root	1.128	3.3 Wed Apr 16 19:04:47 CEST 2008
233	root	1.125	- (libev) linux eventfd support.
234	root	1.128	- (libev) inline more with C99 compilers.
235			- (libev) work around a number of bugs in valgrind.
236			- (libev) work around broken realloc on openbsd and darwin.
237	root	1.126	- added example to EV::MakeMaker manpage.
238	root	1.127	- add async_pending method.
239	root	1.125
240	root	1.123	3.2 Wed Apr 2 17:08:16 CEST 2008
241	root	1.117	- "ported" again to the Microsoft "C" language.
242	root	1.124	- relax testsuite timing for the benefit of freebsd users once more.
243	root	1.121	- fix EVAPI's ev_time and ev_sleep macros.
244	root	1.120	- (libev) fix select backend on 64 bit architetcures.
245	root	1.122	- (libev) ev_loop flags are now local to each invocation.
246	root	1.117
247	root	1.116	3.1 Sat Mar 8 11:41:14 CET 2008
248	root	1.113	- add ev_sync_* and ev_fork_* to EVAPI.h.
249	root	1.115	- provide EV::Embed->sweep method.
250			- new watcher type: async (not very useful in perl).
251	root	1.113
252	root	1.112	3.0 Mon Jan 28 13:23:11 CET 2008
253			- upgrade to libev-3.0.
254	root	1.111	- change child handler to incorporate tracing flag.
255
256	root	1.110	2.01 Mon Dec 31 01:59:19 CET 2007
257			- found a minor problem in the testsuite that is only
258			caught by new Test::Harness versions (reported by Andreas
259			König).
260
261	root	1.107	2.0 Sat Dec 22 17:47:03 CET 2007
262	root	1.100	- no longer force kqueue when enabled, enable it
263			on more systems (as its now by default not used on most).
264	root	1.95	- expose fork watchers.
265			- switch to libev's MULTIPLICITY API.
266	root	1.96	- use a slightly different include file name strategy.
267			- get rid of (unused) libevent emulation.
268	root	1.97	- 5% watcher management speedup due to callback optimisation
269			when inline closures are used, 5% slowdown due to multiplicity.
270	root	1.98	- very minimal support for dynamic event loops and embed watchers.
271	root	1.103	- fix name of prepare start/stop methods.
272	root	1.105	- create and export EV::sleep and EV::set_*_collect_interval.
273	root	1.106	- fix typos in manpage (Alex Efros).
274	root	1.95
275	root	1.94	1.86 Tue Dec 18 02:36:57 CET 2007
276	root	1.93	- add periodic->at methods.
277	root	1.92
278	root	1.91	1.85 Fri Dec 14 20:32:40 CET 2007
279	root	1.90	- further optimise epoll backend by adding a heuristic that
280			avoids EPOLL_CTL_DEL calls if possible.
281	root	1.87	- EV::signal->start was not async-signal safe.
282	root	1.89	- optimise start/stop when the fd hasn't changed.
283	root	1.87
284	root	1.86	1.8 Tue Dec 11 22:17:46 CET 2007
285	root	1.83	- API version 3:0.
286	root	1.81	- reduced fudge factor to zero for select, poll, epoll
287			and kqueue: your system better be posix-compliant
288			even in its extensions :->
289	root	1.82	- improve long-term numerical stability in periodic watchers
290			by introducing a separate offset value instead of reusing at.
291	root	1.84	- recalculate real/monotonic clocks before blocking fully
292			to avoid blocking for longer than necessary.
293	root	1.85	- fix bugs in the heap functions. this rarely lead to illegal
294			heap orderings.
295	root	1.81
296	root	1.80	1.72 Sat Dec 8 15:31:26 CET 2007
297	root	1.77	- add dummy loop arguments to some EVAPI functions
298			so that clients can use EV_A and EV_DEFAULT.
299	root	1.78	- expose ev_clear_pending.
300	root	1.79	- renamed trigger to invoke.
301	root	1.77
302	root	1.76	1.71 Fri Dec 7 19:10:24 CET 2007
303	root	1.75	- changed/implemented idle watcher priority.
304			- allow out-of-range priorities to be set.
305			- fix ->priority to actually work on started watchers.
306			- improved testsuite.
307
308	root	1.74	1.6 Wed Dec 5 15:06:20 CET 2007
309	root	1.70	- add a missing SPAGAIN.
310	root	1.71	- ripped out EV::DNS, use EV::ADNS for a better backend.
311			- make ev_time callable from EVAPI.h.
312	root	1.72	- add EV::loop_count.
313	root	1.73	- some space optimisations.
314	root	1.70
315	root	1.69	1.5 Wed Nov 28 20:19:09 CET 2007
316	root	1.67	- add inotify backend.
317	root	1.69	- make testsuite even less sensible to timing issues,
318			add more stat tests.
319	root	1.68	- add ->attr, ->prev, ->stat calls to stat watcher.
320	root	1.67
321	root	1.66	1.4 Tue Nov 27 17:35:27 CET 2007
322	root	1.64	- work around a linux 2.4 kernel bug in child handlers.
323			- implement stat watcher interface.
324	root	1.65	- implement fork watcher interface.
325	root	1.64	- io->set did not keep the fh alive.
326			- actively check signal numbers/names to be valid.
327			- cleanups, minor fixes, new bugs.
328	root	1.66	- work around windows bugs in the testsuite.
329	root	1.64
330	root	1.63	1.3 Sun Nov 25 10:46:57 CET 2007
331			- stopping idle/check/prepare watchers could cause data corruption.
332	root	1.58	- implement and document EV::once.
333	root	1.57	- improved documentation, verify that netbsd indeed has the only
334			working kqueue implementation (out of darwin, freebsd, netbsd and
335			openbsd). Praise them!
336	root	1.62	- fix the data method so it might work.
337	root	1.59	- expose ev_ref/ev_unref to the C API.
338	root	1.61	- expose ref/unref in form of the ->keepalive method to perl.
339	root	1.58	- minor bugfixes and portability fixes.
340	root	1.57
341	root	1.56	1.2 Thu Nov 22 05:44:09 CET 2007
342			- disable kqueue by default on !netbsd, as its broken on freebsd,
343			darwin and openbsd and thus almost everywhere.
344			- add some allowance in t/01_timer.t for the uneven monotonic
345			vs. realtime clock tick on at least freebsd.
346			- add -lsocket -lnsl on solaris in case the perl guy forgot to
347			configure them.
348
349	root	1.55	1.1 Wed Nov 21 06:08:48 CET 2007
350	root	1.53	- improved timer test to include periodics and
351			withstand small timing variations.
352	root	1.54	- many minor tweaks to libev.
353	root	1.53
354	root	1.52	1.0 Fri Nov 16 14:51:59 CET 2007
355	root	1.50	- require AnyEvent update if AnyEvent is installed.
356	root	1.51	- add solaris 10 port-based backend.
357			- add child_ns and fix check_ns.
358	root	1.52	- treat yes/no as enforcement, not as hint, when configuring,
359			documentation update (reported by Andy Grundman).
360	root	1.50
361	root	1.49	0.9 Wed Nov 14 22:24:49 CET 2007
362	root	1.45	- changed LIBEV_METHODS to LIBEV_FLAGS and the
363			way this is used inside libev.
364	root	1.46	- many, many bugfixes.
365			- add unloop constants.
366	root	1.47	- add timer test.
367	root	1.48	- ev_loop will now terminate immediately when no watchers are active.
368	root	1.45
369	root	1.44	0.8 Mon Nov 12 02:28:46 CET 2007
370	root	1.41	- fix "testsuite" again :().
371			- fix check/idle/prepare/child watcher stop.
372	root	1.42	- enourmously many fixes.
373			- rewritten select backend (mostly for win32).
374			- cache socket handles on win32.
375	root	1.43	- provide considerably finer control over configuration.
376	root	1.41
377	root	1.40	0.7 Fri Nov 9 20:37:58 CET 2007
378	root	1.39	- move AnyEvent adaptor into the AnyEvent module.
379	root	1.41	- use private copy of evdns.[ch].
380	root	1.39	- many minor fixes.
381
382	root	1.38	0.6 Thu Nov 8 18:23:43 CET 2007
383	root	1.95	- (libev) better native win32 support.
384	root	1.35	- fix idle watchers.
385	root	1.37	- implement and document periodic reschedule callbacks.
386			- do not run dns test on !linux platforms (actually to exclude win32).
387	root	1.38	- fix (unused in EV :) poll backend.
388	root	1.34
389	root	1.33	0.51 Tue Nov 6 19:50:22 CET 2007
390	root	1.32	- fix kqueue/poll compilation issue.
391	root	1.33	- work around design issues in kqueue.
392	root	1.32	- enable kqueue by default, seems to work.
393
394	root	1.31	0.5 Tue Nov 6 17:37:44 CET 2007
395	root	1.23	- add signal and pid mutators.
396	root	1.27	- add rstatus/rpid accessors.
397	root	1.24	- updated libev (lower cost for clock monotonic).
398	root	1.25	- support event priorities.
399	root	1.26	- try to find SIG_SIZE on perls that don't have it (Slaven Rezic).
400	root	1.28	- improved signal handling, fixed child watchers.
401	root	1.29	- experimentally add kqueue backend, completely untested.
402	root	1.30	- ported to cygwin and native win32.
403	root	1.23
404	root	1.22	0.1 Thu Nov 1 18:29:22 CET 2007
405	root	1.18	- replaced libevent by libev (total rewrite).
406			- many bugfixes w.r.t. libevent.
407			- new watcher types: periodic, check, prepare, child, idle.
408	root	1.16	- performance optimisations.
409	root	1.19	- added interactive configuration.
410	root	1.21	- added fork support.
411	root	1.16
412	root	1.14	0.03 Mon Oct 29 20:52:50 CET 2007
413	root	1.9	- add timed_io convenience constructors.
414			- improve documentation.
415	root	1.8	- support signal names in addition to signal numbers.
416	root	1.9	- support signal anyevent watchers.
417	root	1.10	- vastly improved testsuite (its all relative :).
418	root	1.11	- add EV::MakeMaker, beginning of C-level API.
419	root	1.12	- force strings to byte form.
420	root	1.6
421	root	1.5	0.02 Sun Oct 28 07:40:21 CET 2007
422	root	1.15	- call $EV::DIED in case a callback throws an exception.
423	root	1.4	- add const char * to typemap for possible 5.6 compatibility.
424	root	1.3
425			0.01 Sat Oct 27 19:10:18 CEST 2007
426			- initial release.
427
428			0.00 Fri Oct 26 11:12:57 CEST 2007
429	root	1.1	- original version; cloned from JSON::XS
430