[ViewVC] Annotation of: cvs/libev/Changes

Revision history for libev, a high-performance and full-featured event loop.

TODO: move some other examples to common idioms? combining watchers,
thread usage, coroutine switch?

4.01 Fri Nov  5 21:51:29 CET 2010
        - automake fucked it up, apparently, --add-missing -f is not quite enough
          to make it update its files, so 4.00 didn't install ev++.h and
          event.h on make install. grrr.
        - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
        - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
        - use "(libev) " prefix for all libev error messages now.

4.00 Mon Oct 25 12:32:12 CEST 2010
        - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
        - ev_embed_stop did not correctly stop the watcher (very good
          testcase by Vladimir Timofeev).
        - ev_run will now always update the current loop time - it erroneously
          didn't when idle watchers were active, causing timers not to fire.
        - fix a bug where a timeout of zero caused the timer not to fire
          in the libevent emulation (testcase by Péter Szabó).
        - applied win32 fixes by Michael Lenaghan (also James Mansion).
        - replace EV_MINIMAL by EV_FEATURES.
        - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
          seems the former is *much* faster than the latter.
        - linux kernel version detection (for inotify bug workarounds)
          did not work properly.
        - reduce the number of spurious wake-ups with the ports backend.
        - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
        - do async init within ev_async_start, not ev_async_set, which avoids
          an API quirk where the set function must be called in the C++ API
          even when there is nothing to set.
        - add (undocumented) EV_ENABLE when adding events with kqueue,
          this might help with OS X, which seems to need it despite documenting
          not to need it (helpfully pointed out by Tilghman Lesher).
        - do not use poll by default on freebsd, it's broken (what isn't
          on freebsd...).
        - allow to embed epoll on kernels >= 2.6.32.
        - configure now prepends -O3, not appends it, so one can still
          override it.
        - ev.pod: greatly expanded the portability section, added a porting
          section, a description of watcher states and made lots of minor fixes.
        - disable poll backend on AIX, the poll header spams the namespace
          and it's not worth working around dead platforms (reported
          and analyzed by Aivars Kalvans).
        - improve header file compatibility of the standalone eventfd code
          in an obscure case.
        - implement EV_AVOID_STDIO option.
        - do not use sscanf to parse linux version number (smaller, faster,
          no sscanf dependency).
        - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
        - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
        - add section on accept() problems to the manpage.
        - rename EV_TIMEOUT to EV_TIMER.
        - rename ev_loop_count/depth/verify/loop/unloop.
        - remove ev_default_destroy and ev_default_fork.
        - switch to two-digit minor version.
        - work around an apparent gentoo compiler bug.
        - define _DARWIN_UNLIMITED_SELECT. just so.
        - use enum instead of #define for most constants.
        - improve compatibility to older C++ compilers.
        - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
          default arguments when compiled as C++.
        - enable automake dependency tracking.
        - ev_loop_new no longer leaks memory when loop creation failed.
        - new ev_cleanup watcher type.

3.9  Thu Dec 31 07:59:59 CET 2009
        - signalfd is no longer used by default and has to be requested
          explicitly - this means that easy to catch bugs become hard to
          catch race conditions, but the users have spoken.
        - point out the unspecified signal mask in the documentation, and
          that this is a race condition regardless of EV_SIGNALFD.
        - backport inotify code to C89.
        - inotify file descriptors could leak into child processes.
        - ev_stat watchers could keep an errornous extra ref on the loop,
          preventing exit when unregistering all watchers (testcases
          provided by ry@tinyclouds.org).
        - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
          symbols to make it easier for apps to do their own fd management.
        - support EV_IDLE_ENABLE being disabled in ev++.h
          (patch by Didier Spezia).
        - take advantage of inotify_init1, if available, to set cloexec/nonblock
          on fd creation, to avoid races.
        - the signal handling pipe wasn't always initialised under windows
          (analysed by lekma).
        - changed minimum glibc requirement from glibc 2.9 to 2.7, for
          signalfd.
        - add missing string.h include (Denis F. Latypoff).
        - only replace ev_stat.prev when we detect an actual difference,
          so prev is (almost) always different to attr. this might
          have caused the problems with 04_stat.t.
        - add ev::timer->remaining () method to C++ API.

3.8  Sun Aug  9 14:30:45 CEST 2009
        - incompatible change: do not necessarily reset signal handler
          to SIG_DFL when a sighandler is stopped.
        - ev_default_destroy did not properly free or zero some members,
          potentially causing crashes and memory corruption on repeated
          ev_default_destroy/ev_default_loop calls.
        - take advantage of signalfd on GNU/Linux systems.
        - document that the signal mask might be in an unspecified
          state when using libev's signal handling.
        - take advantage of some GNU/Linux calls to set cloexec/nonblock
          on fd creation, to avoid race conditions.

3.7  Fri Jul 17 16:36:32 CEST 2009
        - ev_unloop and ev_loop wrongly used a global variable to exit loops,
          instead of using a per-loop variable (bug caught by accident...).
        - the ev_set_io_collect_interval interpretation has changed.
        - add new functionality: ev_set_userdata, ev_userdata,
          ev_set_invoke_pending_cb, ev_set_loop_release_cb,
          ev_invoke_pending, ev_pending_count, together with a long example
          about thread locking.
        - add ev_timer_remaining (as requested by Denis F. Latypoff).
        - add ev_loop_depth.
        - calling ev_unloop in fork/prepare watchers will no longer poll
          for new events.
        - Denis F. Latypoff corrected many typos in example code snippets.
        - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
          check that the syscall number is available before trying to
          use it (reported by ry@tinyclouds).
        - use GetSystemTimeAsFileTime instead of _timeb on windows, for
          slightly higher accuracy.
        - properly declare ev_loop_verify and ev_now_update even when
          !EV_MULTIPLICITY.
        - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
        - support EV_MINIMAL==2 for a reduced API.
        - actually 0-initialise struct sigaction when installing signals.
        - add section on hibernate and stopped processes to ev_timer docs.

3.6  Tue Apr 28 02:49:30 CEST 2009
        - multiple timers becoming ready within an event loop iteration
          will be invoked in the "correct" order now.
        - 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).
        - correctly zero the idx values for arrays, so destroying and
          reinitialising the default loop actually works (patch by
          Malek Hadj-Ali).
        - implement ev_suspend and ev_resume.
        - new EV_CUSTOM revents flag for use by applications.
        - add documentation section about priorites.
        - add a glossary to the dcoumentation.
        - extend the ev_fork description slightly.
        - optimize a jump out of call_pending.

3.53 Sun Feb 15 02:38:20 CET 2009
        - fix a bug in event pipe creation on win32 that would cause a
          failed assertion on event loop creation (patch by Malek Hadj-Ali).
        - 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 with USE_CLOCK_SYSCALL
          (default most everywhere), otherwise not.

3.52 Wed Jan  7 21:43:02 CET 2009
        - fix compilation of select backend in fd_set mode when NFDBITS is
          missing (to get it to compile on QNX, reported by Rodrigo Campos).
        - better select-nfds handling when select backend is in fd_set mode.
        - diagnose fd_set overruns when select backend is in fd_set mode.
        - 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).
        - 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.
        - include "libev" in all assertion messages for potentially
          clearer diagnostics.
        - event_get_version (libevent compatibility) returned
          a useless string instead of the expected version string
          (patch by W.C.A. Wijngaards).

3.51 Wed Dec 24 23:00:11 CET 2008
        - fix a bug where an inotify watcher was added twice, causing
          freezes on hash collisions (reported and analysed by Graham Leggett).
        - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
          a direct syscall - slower, but no dependency on librt et al.
        - assume negative return values != -1 signals success of port_getn
          (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
          (no known failure reports, but it doesn't hurt).
        - fork detection in ev_embed now stops and restarts the watcher
          automatically.
        - EXPERIMENTAL: default the method to operator () in ev++.h,
          to make it nicer to use functors (requested by Benedek László).
        - fixed const object callbacks in ev++.h.
        - replaced loop_ref argument of watcher.set (loop) by a direct
          ev_loop * in ev++.h, to avoid clashes with functor patch.
        - do not try to watch the empty string via inotify.
        - inotify watchers could be leaked under certain circumstances.
        - OS X 10.5 is actually even more broken than earlier versions,
          so fall back to select on that piece of garbage.
        - fixed some weirdness in the ev_embed documentation.

3.49 Wed Nov 19 11:26:53 CET 2008
        - ev_stat watchers will now use inotify as a mere hint on
          kernels <2.6.25, or if the filesystem is not in the
          "known to be good" list.
        - better mingw32 compatibility (it's not as borked as native win32)
          (analysed by Roger Pack).
        - include stdio.h in the example program, as too many people are
          confused by the weird C language otherwise. I guess the next thing
          I get told is that the "..." ellipses in the examples don't compile
          with their C compiler.

3.48 Thu Oct 30 09:02:37 CET 2008
        - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
          backend by assuming the kernel event mask hasn't changed if
          ADD fails with EEXIST.
        - work around spurious event notification bugs in epoll by using
          a 32-bit generation counter. recreate kernel state if we receive
          spurious notifications or unwanted events. this is very costly,
          but I didn't come up with this horrible design.
        - use memset to initialise most arrays now and do away with the
          init functions.
        - expand time-out strategies into a "Be smart about timeouts" section.
        - drop the "struct" from all ev_watcher declarations in the
          documentation and did other clarifications (yeah, it was a mistake
          to have a struct AND a function called ev_loop).
        - fix a bug where ev_default would not initialise the default
          loop again after it was destroyed with ev_default_destroy.
        - rename syserr to ev_syserr to avoid name clashes when embedding,
          do similar changes for event.c.

3.45 Tue Oct 21 21:59:26 CEST 2008
        - disable inotify usage on linux <2.6.25, as it is broken
          (reported by Yoann Vandoorselaere).
        - ev_stat erroneously would try to add inotify watchers
          even when inotify wasn't available (this should only
          have a performance impact).
        - ev_once now passes both timeout and io to the callback if both
          occur concurrently, instead of giving timeouts precedence.
        - disable EV_USE_INOTIFY when sys/inotify.h is too old.

3.44 Mon Sep 29 05:18:39 CEST 2008
        - embed watchers now automatically invoke ev_loop_fork on the
          embedded loop when the parent loop forks.
        - new function: ev_now_update (loop).
        - verify_watcher was not marked static.
        - improve the "associating..." manpage section.
        - documentation tweaks here and there.

3.43 Sun Jul  6 05:34:41 CEST 2008
        - include more include files on windows to get struct _stati64
          (reported by Chris Hulbert, but doesn't quite fix his issue).
        - add missing #include <io.h> in ev.c on windows (reported by
          Matt Tolton).

3.42 Tue Jun 17 12:12:07 CEST 2008
        - work around yet another windows bug: FD_SET actually adds fd's
          multiple times to the fd_*SET*, despite official MSN docs claiming
          otherwise. Reported and well-analysed by Matt Tolton.
        - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
          (reported any analysed by Chris Hulbert).
        - fix a bug in ev_ebadf (this function is only used to catch
          programming errors in the libev user). reported by Matt Tolton.
        - fix a bug in fd_intern on win32 (could lead to compile errors
          under some circumstances, but would work correctly if it compiles).
          reported by Matt Tolton.
        - (try to) work around missing lstat on windows.
        - pass in the write fd set as except fd set under windows. windows
          is so uncontrollably lame that it requires this. this means that
          switching off oobinline is not supported (but tcp/ip doesn't
          have oob, so that would be stupid anyways.
        - use posix module symbol to auto-detect monotonic clock presence
          and some other default values.

3.41 Fri May 23 18:42:54 CEST 2008
        - work around an obscure bug in winsocket select: if you
          provide only empty fd sets then select returns WSAEINVAL. how sucky.
        - improve timer scheduling stability and reduce use of time_epsilon.
        - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
          codesize and makes for better cache-efficiency.
        - use 3-based 4-heap for !EV_MINIMAL. this makes better use
          of cpu cache lines and gives better growth behaviour than
          2-based heaps.
        - cache timestamp within heap for !EV_MINIMAL, to avoid random
          memory accesses.
        - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
        - fix a potential aliasing issue in ev_timer_again.
        - add/document ev_periodic_at, retract direct access to ->at.
        - improve ev_stat docs.
        - add portability requirements section.
        - fix manpage headers etc.
        - normalise WSA error codes to lower range on windows.
        - add consistency check code that can be called automatically
          or on demand to check for internal structures (ev_loop_verify).

3.31 Wed Apr 16 20:45:04 CEST 2008
        - added last minute fix for ev_poll.c by Brandon Black.

3.3  Wed Apr 16 19:04:10 CEST 2008
        - event_base_loopexit should return 0 on success
          (W.C.A. Wijngaards).
        - added linux eventfd support.
        - try to autodetect epoll and inotify support
          by libc header version if not using autoconf.
        - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
        - declare functions defined in ev.h as inline if
          C99 or gcc are available.
        - enable inlining with gcc versions 2 and 3.
        - work around broken poll implementations potentially
          not clearing revents field in ev_poll (Brandon Black)
          (no such systems are known at this time).
        - work around a bug in realloc on openbsd and darwin,
          also makes the erroneous valgrind complaints
          go away (noted by various people).
        - fix ev_async_pending, add c++ wrapper for ev_async
          (based on patch sent by Johannes Deisenhofer).
        - add sensible set method to ev::embed.
        - made integer constants type int in ev.h.

3.2  Wed Apr  2 17:11:19 CEST 2008
        - fix a 64 bit overflow issue in the select backend,
          by using fd_mask instead of int for the mask.
        - rename internal sighandler to avoid clash with very old perls.
        - entering ev_loop will not clear the ONESHOT or NONBLOCKING
          flags of any outer loops anymore.
        - add ev_async_pending.

3.1  Thu Mar 13 13:45:22 CET 2008
        - implement ev_async watchers.
        - only initialise signal pipe on demand.
        - make use of sig_atomic_t configurable.
        - improved documentation.

3.0  Mon Jan 28 13:14:47 CET 2008
        - API/ABI bump to version 3.0.
        - ev++.h includes "ev.h" by default now, not <ev.h>.
        - slightly improved documentation.
        - speed up signal detection after a fork.
        - only optionally return trace status changed in ev_child
          watchers.
        - experimental (and undocumented) loop wrappers for ev++.h.

2.01 Tue Dec 25 08:04:41 CET 2007
        - separate Changes file.
        - fix ev_path_set => ev_stat_set typo.
        - remove event_compat.h from the libev tarball.
        - change how include files are found.
        - doc updates.
        - update licenses, explicitly allow for GPL relicensing.

2.0  Sat Dec 22 17:47:03 CET 2007
        - new ev_sleep, ev_set_(io|timeout)_collect_interval.
        - removed epoll from embeddable fd set.
        - fix embed watchers.
        - renamed ev_embed.loop to other.
        - added exported Symbol tables.
        - undefine member wrapper macros at the end of ev.c.
        - respect EV_H in ev++.h.

1.86 Tue Dec 18 02:36:57 CET 2007
        - fix memleak on loop destroy (not relevant for perl).

1.85 Fri Dec 14 20:32:40 CET 2007
        - fix some aliasing issues w.r.t. timers and periodics
          (not relevant for perl).

(for historic versions refer to EV/Changes, found in the Perl interface)

0.1  Wed Oct 31 21:31:48 CET 2007
        - original version; hacked together in <24h.

Revision:	1.208
Committed:	Wed Nov 10 14:36:42 2010 UTC (13 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.207:	+3 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.14	Revision history for libev, a high-performance and full-featured event loop.
2	root	1.1
3	root	1.208	TODO: move some other examples to common idioms? combining watchers,
4			thread usage, coroutine switch?
5
6	root	1.207	4.01 Fri Nov 5 21:51:29 CET 2010
7	root	1.205	- automake fucked it up, apparently, --add-missing -f is not quite enough
8	root	1.206	to make it update its files, so 4.00 didn't install ev++.h and
9			event.h on make install. grrr.
10			- ev_loop(count\|depth) didn't return anything (Robin Haberkorn).
11	root	1.203	- change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
12	root	1.204	- use "(libev) " prefix for all libev error messages now.
13	root	1.203
14	root	1.202	4.00 Mon Oct 25 12:32:12 CEST 2010
15	root	1.171	- "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
16	root	1.161	- ev_embed_stop did not correctly stop the watcher (very good
17			testcase by Vladimir Timofeev).
18	sf-exg	1.191	- ev_run will now always update the current loop time - it erroneously
19	root	1.187	didn't when idle watchers were active, causing timers not to fire.
20	root	1.179	- fix a bug where a timeout of zero caused the timer not to fire
21			in the libevent emulation (testcase by Péter Szabó).
22	root	1.164	- applied win32 fixes by Michael Lenaghan (also James Mansion).
23	root	1.166	- replace EV_MINIMAL by EV_FEATURES.
24	root	1.178	- prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
25			seems the former is much faster than the latter.
26	root	1.197	- linux kernel version detection (for inotify bug workarounds)
27			did not work properly.
28	root	1.185	- reduce the number of spurious wake-ups with the ports backend.
29	root	1.158	- remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
30	root	1.186	- do async init within ev_async_start, not ev_async_set, which avoids
31			an API quirk where the set function must be called in the C++ API
32			even when there is nothing to set.
33	root	1.174	- add (undocumented) EV_ENABLE when adding events with kqueue,
34	root	1.175	this might help with OS X, which seems to need it despite documenting
35			not to need it (helpfully pointed out by Tilghman Lesher).
36	root	1.176	- do not use poll by default on freebsd, it's broken (what isn't
37			on freebsd...).
38	root	1.195	- allow to embed epoll on kernels >= 2.6.32.
39	root	1.159	- configure now prepends -O3, not appends it, so one can still
40			override it.
41	root	1.190	- ev.pod: greatly expanded the portability section, added a porting
42			section, a description of watcher states and made lots of minor fixes.
43	root	1.160	- disable poll backend on AIX, the poll header spams the namespace
44			and it's not worth working around dead platforms (reported
45			and analyzed by Aivars Kalvans).
46	root	1.162	- improve header file compatibility of the standalone eventfd code
47			in an obscure case.
48	root	1.163	- implement EV_AVOID_STDIO option.
49			- do not use sscanf to parse linux version number (smaller, faster,
50			no sscanf dependency).
51	root	1.164	- new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
52	sf-exg	1.172	- update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
53	root	1.165	- add section on accept() problems to the manpage.
54	root	1.168	- rename EV_TIMEOUT to EV_TIMER.
55	root	1.190	- rename ev_loop_count/depth/verify/loop/unloop.
56	root	1.197	- remove ev_default_destroy and ev_default_fork.
57	root	1.168	- switch to two-digit minor version.
58	root	1.180	- work around an apparent gentoo compiler bug.
59	root	1.181	- define _DARWIN_UNLIMITED_SELECT. just so.
60	root	1.188	- use enum instead of #define for most constants.
61			- improve compatibility to older C++ compilers.
62	root	1.193	- (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
63			default arguments when compiled as C++.
64	root	1.196	- enable automake dependency tracking.
65	root	1.197	- ev_loop_new no longer leaks memory when loop creation failed.
66	root	1.198	- new ev_cleanup watcher type.
67	root	1.157
68	root	1.156	3.9 Thu Dec 31 07:59:59 CET 2009
69	root	1.155	- signalfd is no longer used by default and has to be requested
70			explicitly - this means that easy to catch bugs become hard to
71			catch race conditions, but the users have spoken.
72			- point out the unspecified signal mask in the documentation, and
73			that this is a race condition regardless of EV_SIGNALFD.
74	root	1.142	- backport inotify code to C89.
75	root	1.148	- inotify file descriptors could leak into child processes.
76	root	1.151	- ev_stat watchers could keep an errornous extra ref on the loop,
77			preventing exit when unregistering all watchers (testcases
78	root	1.150	provided by ry@tinyclouds.org).
79	root	1.143	- implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
80	root	1.145	symbols to make it easier for apps to do their own fd management.
81	root	1.144	- support EV_IDLE_ENABLE being disabled in ev++.h
82			(patch by Didier Spezia).
83	root	1.147	- take advantage of inotify_init1, if available, to set cloexec/nonblock
84			on fd creation, to avoid races.
85	root	1.150	- the signal handling pipe wasn't always initialised under windows
86			(analysed by lekma).
87	root	1.146	- changed minimum glibc requirement from glibc 2.9 to 2.7, for
88			signalfd.
89	root	1.152	- add missing string.h include (Denis F. Latypoff).
90	root	1.153	- only replace ev_stat.prev when we detect an actual difference,
91			so prev is (almost) always different to attr. this might
92	sf-exg	1.191	have caused the problems with 04_stat.t.
93	root	1.154	- add ev::timer->remaining () method to C++ API.
94	root	1.142
95	root	1.141	3.8 Sun Aug 9 14:30:45 CEST 2009
96	root	1.133	- incompatible change: do not necessarily reset signal handler
97			to SIG_DFL when a sighandler is stopped.
98	root	1.135	- ev_default_destroy did not properly free or zero some members,
99	sf-exg	1.191	potentially causing crashes and memory corruption on repeated
100	root	1.134	ev_default_destroy/ev_default_loop calls.
101	root	1.133	- take advantage of signalfd on GNU/Linux systems.
102			- document that the signal mask might be in an unspecified
103			state when using libev's signal handling.
104	root	1.136	- take advantage of some GNU/Linux calls to set cloexec/nonblock
105			on fd creation, to avoid race conditions.
106	root	1.132
107	root	1.131	3.7 Fri Jul 17 16:36:32 CEST 2009
108	root	1.128	- ev_unloop and ev_loop wrongly used a global variable to exit loops,
109			instead of using a per-loop variable (bug caught by accident...).
110			- the ev_set_io_collect_interval interpretation has changed.
111			- add new functionality: ev_set_userdata, ev_userdata,
112	root	1.126	ev_set_invoke_pending_cb, ev_set_loop_release_cb,
113	root	1.132	ev_invoke_pending, ev_pending_count, together with a long example
114			about thread locking.
115	root	1.128	- add ev_timer_remaining (as requested by Denis F. Latypoff).
116			- add ev_loop_depth.
117	root	1.124	- calling ev_unloop in fork/prepare watchers will no longer poll
118			for new events.
119	root	1.115	- Denis F. Latypoff corrected many typos in example code snippets.
120			- honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
121			check that the syscall number is available before trying to
122			use it (reported by ry@tinyclouds).
123	root	1.117	- use GetSystemTimeAsFileTime instead of _timeb on windows, for
124	root	1.116	slightly higher accuracy.
125	root	1.122	- properly declare ev_loop_verify and ev_now_update even when
126			!EV_MULTIPLICITY.
127	root	1.121	- do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
128	root	1.123	- support EV_MINIMAL==2 for a reduced API.
129	root	1.125	- actually 0-initialise struct sigaction when installing signals.
130	root	1.127	- add section on hibernate and stopped processes to ev_timer docs.
131	root	1.115
132	root	1.113	3.6 Tue Apr 28 02:49:30 CEST 2009
133	root	1.107	- multiple timers becoming ready within an event loop iteration
134			will be invoked in the "correct" order now.
135	root	1.105	- do not leave the event loop early just because we have no active
136			watchers, fixing a problem when embedding a kqueue loop
137			that has active kernel events but no registered watchers
138			(reported by blacksand blacksand).
139	root	1.102	- correctly zero the idx values for arrays, so destroying and
140			reinitialising the default loop actually works (patch by
141			Malek Hadj-Ali).
142	root	1.108	- implement ev_suspend and ev_resume.
143	root	1.106	- new EV_CUSTOM revents flag for use by applications.
144	root	1.109	- add documentation section about priorites.
145			- add a glossary to the dcoumentation.
146	root	1.111	- extend the ev_fork description slightly.
147	root	1.112	- optimize a jump out of call_pending.
148	root	1.102
149	root	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
150			- fix a bug in event pipe creation on win32 that would cause a
151			failed assertion on event loop creation (patch by Malek Hadj-Ali).
152	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
153			back to gettimeofday if there is an error, to support older
154			operating systems with newer header files/libraries.
155			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
156			(default most everywhere), otherwise not.
157
158	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
159	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
160			missing (to get it to compile on QNX, reported by Rodrigo Campos).
161			- better select-nfds handling when select backend is in fd_set mode.
162			- diagnose fd_set overruns when select backend is in fd_set mode.
163			- due to a thinko, instead of disabling everything but
164			select on the borked OS X platform, everything but select was
165			allowed (reported by Emanuele Giaquinta).
166	root	1.95	- actually verify that local and remote port are matching in
167			libev's socketpair emulation, which makes denial-of-service
168			attacks harder (but not impossible - it's windows). Make sure
169	root	1.96	it even works under vista, which thinks that getpeer/sockname
170			should return fantasy port numbers.
171	root	1.100	- include "libev" in all assertion messages for potentially
172	root	1.97	clearer diagnostics.
173	root	1.98	- event_get_version (libevent compatibility) returned
174			a useless string instead of the expected version string
175			(patch by W.C.A. Wijngaards).
176	root	1.95
177	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
178	root	1.91	- fix a bug where an inotify watcher was added twice, causing
179	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
180	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
181			a direct syscall - slower, but no dependency on librt et al.
182	root	1.88	- assume negative return values != -1 signals success of port_getn
183			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
184			(no known failure reports, but it doesn't hurt).
185	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
186			automatically.
187	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
188			to make it nicer to use functors (requested by Benedek László).
189			- fixed const object callbacks in ev++.h.
190	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
191			ev_loop * in ev++.h, to avoid clashes with functor patch.
192	root	1.91	- do not try to watch the empty string via inotify.
193	root	1.92	- inotify watchers could be leaked under certain circumstances.
194			- OS X 10.5 is actually even more broken than earlier versions,
195			so fall back to select on that piece of garbage.
196	root	1.93	- fixed some weirdness in the ev_embed documentation.
197	root	1.87
198	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
199	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
200			kernels <2.6.25, or if the filesystem is not in the
201			"known to be good" list.
202	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
203			(analysed by Roger Pack).
204	root	1.85	- include stdio.h in the example program, as too many people are
205			confused by the weird C language otherwise. I guess the next thing
206			I get told is that the "..." ellipses in the examples don't compile
207			with their C compiler.
208	root	1.83
209	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
210	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
211			backend by assuming the kernel event mask hasn't changed if
212			ADD fails with EEXIST.
213	root	1.75	- work around spurious event notification bugs in epoll by using
214	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
215	root	1.78	spurious notifications or unwanted events. this is very costly,
216			but I didn't come up with this horrible design.
217	root	1.71	- use memset to initialise most arrays now and do away with the
218			init functions.
219	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
220			- drop the "struct" from all ev_watcher declarations in the
221	root	1.73	documentation and did other clarifications (yeah, it was a mistake
222			to have a struct AND a function called ev_loop).
223	root	1.74	- fix a bug where ev_default would not initialise the default
224			loop again after it was destroyed with ev_default_destroy.
225	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
226			do similar changes for event.c.
227	root	1.71
228	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
229	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
230			(reported by Yoann Vandoorselaere).
231	sf-exg	1.191	- ev_stat erroneously would try to add inotify watchers
232	root	1.68	even when inotify wasn't available (this should only
233	root	1.67	have a performance impact).
234	root	1.65	- ev_once now passes both timeout and io to the callback if both
235			occur concurrently, instead of giving timeouts precedence.
236	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
237	root	1.65
238	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
239			- embed watchers now automatically invoke ev_loop_fork on the
240			embedded loop when the parent loop forks.
241	root	1.58	- new function: ev_now_update (loop).
242	root	1.57	- verify_watcher was not marked static.
243	root	1.59	- improve the "associating..." manpage section.
244	root	1.60	- documentation tweaks here and there.
245	root	1.57
246	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
247	root	1.54	- include more include files on windows to get struct _stati64
248	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
249	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
250			Matt Tolton).
251
252	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
253	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
254			multiple times to the fd_SET, despite official MSN docs claiming
255	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
256			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
257	root	1.48	(reported any analysed by Chris Hulbert).
258	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
259			programming errors in the libev user). reported by Matt Tolton.
260			- fix a bug in fd_intern on win32 (could lead to compile errors
261			under some circumstances, but would work correctly if it compiles).
262			reported by Matt Tolton.
263	root	1.50	- (try to) work around missing lstat on windows.
264	root	1.45	- pass in the write fd set as except fd set under windows. windows
265	root	1.46	is so uncontrollably lame that it requires this. this means that
266			switching off oobinline is not supported (but tcp/ip doesn't
267			have oob, so that would be stupid anyways.
268	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
269			and some other default values.
270	root	1.45
271	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
272	root	1.46	- work around an obscure bug in winsocket select: if you
273	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
274	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
275	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
276			codesize and makes for better cache-efficiency.
277			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
278			of cpu cache lines and gives better growth behaviour than
279			2-based heaps.
280	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
281			memory accesses.
282			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
283	root	1.33	- fix a potential aliasing issue in ev_timer_again.
284	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
285			- improve ev_stat docs.
286			- add portability requirements section.
287	root	1.39	- fix manpage headers etc.
288	root	1.40	- normalise WSA error codes to lower range on windows.
289	root	1.43	- add consistency check code that can be called automatically
290			or on demand to check for internal structures (ev_loop_verify).
291	root	1.31
292	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
293			- added last minute fix for ev_poll.c by Brandon Black.
294	root	1.29
295	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
296	root	1.23	- event_base_loopexit should return 0 on success
297			(W.C.A. Wijngaards).
298	root	1.20	- added linux eventfd support.
299			- try to autodetect epoll and inotify support
300			by libc header version if not using autoconf.
301	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
302			- declare functions defined in ev.h as inline if
303			C99 or gcc are available.
304			- enable inlining with gcc versions 2 and 3.
305	root	1.25	- work around broken poll implementations potentially
306			not clearing revents field in ev_poll (Brandon Black)
307			(no such systems are known at this time).
308	root	1.23	- work around a bug in realloc on openbsd and darwin,
309	sf-exg	1.191	also makes the erroneous valgrind complaints
310	root	1.23	go away (noted by various people).
311	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
312	sf-exg	1.191	(based on patch sent by Johannes Deisenhofer).
313	root	1.26	- add sensible set method to ev::embed.
314	root	1.27	- made integer constants type int in ev.h.
315	root	1.20
316	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
317	root	1.15	- fix a 64 bit overflow issue in the select backend,
318			by using fd_mask instead of int for the mask.
319	root	1.16	- rename internal sighandler to avoid clash with very old perls.
320	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
321			flags of any outer loops anymore.
322	root	1.17	- add ev_async_pending.
323	root	1.15
324	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
325	root	1.12	- implement ev_async watchers.
326	root	1.10	- only initialise signal pipe on demand.
327			- make use of sig_atomic_t configurable.
328	root	1.14	- improved documentation.
329	root	1.10
330	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
331	root	1.6	- API/ABI bump to version 3.0.
332	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
333			- slightly improved documentation.
334	root	1.5	- speed up signal detection after a fork.
335	root	1.6	- only optionally return trace status changed in ev_child
336			watchers.
337	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
338	root	1.4
339	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
340	root	1.3	- separate Changes file.
341	root	1.2	- fix ev_path_set => ev_stat_set typo.
342			- remove event_compat.h from the libev tarball.
343			- change how include files are found.
344			- doc updates.
345			- update licenses, explicitly allow for GPL relicensing.
346
347			2.0 Sat Dec 22 17:47:03 CET 2007
348			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
349			- removed epoll from embeddable fd set.
350			- fix embed watchers.
351			- renamed ev_embed.loop to other.
352			- added exported Symbol tables.
353			- undefine member wrapper macros at the end of ev.c.
354			- respect EV_H in ev++.h.
355
356			1.86 Tue Dec 18 02:36:57 CET 2007
357			- fix memleak on loop destroy (not relevant for perl).
358
359			1.85 Fri Dec 14 20:32:40 CET 2007
360			- fix some aliasing issues w.r.t. timers and periodics
361			(not relevant for perl).
362
363			(for historic versions refer to EV/Changes, found in the Perl interface)
364
365	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
366			- original version; hacked together in <24h.
367