[ViewVC] Annotation of: cvs/libev/Changes

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

        - "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:	1.201
Committed:	Mon Oct 25 10:30:23 2010 UTC (13 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.200:	+0 -1 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	1.171	- "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
4	root	1.161	- ev_embed_stop did not correctly stop the watcher (very good
5			testcase by Vladimir Timofeev).
6	sf-exg	1.191	- ev_run will now always update the current loop time - it erroneously
7	root	1.187	didn't when idle watchers were active, causing timers not to fire.
8	root	1.179	- fix a bug where a timeout of zero caused the timer not to fire
9			in the libevent emulation (testcase by Péter Szabó).
10	root	1.164	- applied win32 fixes by Michael Lenaghan (also James Mansion).
11	root	1.166	- replace EV_MINIMAL by EV_FEATURES.
12	root	1.178	- prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
13			seems the former is much faster than the latter.
14	root	1.197	- linux kernel version detection (for inotify bug workarounds)
15			did not work properly.
16	root	1.185	- reduce the number of spurious wake-ups with the ports backend.
17	root	1.158	- remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
18	root	1.186	- do async init within ev_async_start, not ev_async_set, which avoids
19			an API quirk where the set function must be called in the C++ API
20			even when there is nothing to set.
21	root	1.174	- add (undocumented) EV_ENABLE when adding events with kqueue,
22	root	1.175	this might help with OS X, which seems to need it despite documenting
23			not to need it (helpfully pointed out by Tilghman Lesher).
24	root	1.176	- do not use poll by default on freebsd, it's broken (what isn't
25			on freebsd...).
26	root	1.195	- allow to embed epoll on kernels >= 2.6.32.
27	root	1.159	- configure now prepends -O3, not appends it, so one can still
28			override it.
29	root	1.190	- ev.pod: greatly expanded the portability section, added a porting
30			section, a description of watcher states and made lots of minor fixes.
31	root	1.160	- disable poll backend on AIX, the poll header spams the namespace
32			and it's not worth working around dead platforms (reported
33			and analyzed by Aivars Kalvans).
34	root	1.162	- improve header file compatibility of the standalone eventfd code
35			in an obscure case.
36	root	1.163	- implement EV_AVOID_STDIO option.
37			- do not use sscanf to parse linux version number (smaller, faster,
38			no sscanf dependency).
39	root	1.164	- new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
40	sf-exg	1.172	- update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
41	root	1.165	- add section on accept() problems to the manpage.
42	root	1.168	- rename EV_TIMEOUT to EV_TIMER.
43	root	1.190	- rename ev_loop_count/depth/verify/loop/unloop.
44	root	1.197	- remove ev_default_destroy and ev_default_fork.
45	root	1.168	- switch to two-digit minor version.
46	root	1.180	- work around an apparent gentoo compiler bug.
47	root	1.181	- define _DARWIN_UNLIMITED_SELECT. just so.
48	root	1.188	- use enum instead of #define for most constants.
49			- improve compatibility to older C++ compilers.
50	root	1.193	- (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
51			default arguments when compiled as C++.
52	root	1.196	- enable automake dependency tracking.
53	root	1.197	- ev_loop_new no longer leaks memory when loop creation failed.
54	root	1.198	- new ev_cleanup watcher type.
55	root	1.157
56	root	1.156	3.9 Thu Dec 31 07:59:59 CET 2009
57	root	1.155	- signalfd is no longer used by default and has to be requested
58			explicitly - this means that easy to catch bugs become hard to
59			catch race conditions, but the users have spoken.
60			- point out the unspecified signal mask in the documentation, and
61			that this is a race condition regardless of EV_SIGNALFD.
62	root	1.142	- backport inotify code to C89.
63	root	1.148	- inotify file descriptors could leak into child processes.
64	root	1.151	- ev_stat watchers could keep an errornous extra ref on the loop,
65			preventing exit when unregistering all watchers (testcases
66	root	1.150	provided by ry@tinyclouds.org).
67	root	1.143	- implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
68	root	1.145	symbols to make it easier for apps to do their own fd management.
69	root	1.144	- support EV_IDLE_ENABLE being disabled in ev++.h
70			(patch by Didier Spezia).
71	root	1.147	- take advantage of inotify_init1, if available, to set cloexec/nonblock
72			on fd creation, to avoid races.
73	root	1.150	- the signal handling pipe wasn't always initialised under windows
74			(analysed by lekma).
75	root	1.146	- changed minimum glibc requirement from glibc 2.9 to 2.7, for
76			signalfd.
77	root	1.152	- add missing string.h include (Denis F. Latypoff).
78	root	1.153	- only replace ev_stat.prev when we detect an actual difference,
79			so prev is (almost) always different to attr. this might
80	sf-exg	1.191	have caused the problems with 04_stat.t.
81	root	1.154	- add ev::timer->remaining () method to C++ API.
82	root	1.142
83	root	1.141	3.8 Sun Aug 9 14:30:45 CEST 2009
84	root	1.133	- incompatible change: do not necessarily reset signal handler
85			to SIG_DFL when a sighandler is stopped.
86	root	1.135	- ev_default_destroy did not properly free or zero some members,
87	sf-exg	1.191	potentially causing crashes and memory corruption on repeated
88	root	1.134	ev_default_destroy/ev_default_loop calls.
89	root	1.133	- take advantage of signalfd on GNU/Linux systems.
90			- document that the signal mask might be in an unspecified
91			state when using libev's signal handling.
92	root	1.136	- take advantage of some GNU/Linux calls to set cloexec/nonblock
93			on fd creation, to avoid race conditions.
94	root	1.132
95	root	1.131	3.7 Fri Jul 17 16:36:32 CEST 2009
96	root	1.128	- ev_unloop and ev_loop wrongly used a global variable to exit loops,
97			instead of using a per-loop variable (bug caught by accident...).
98			- the ev_set_io_collect_interval interpretation has changed.
99			- add new functionality: ev_set_userdata, ev_userdata,
100	root	1.126	ev_set_invoke_pending_cb, ev_set_loop_release_cb,
101	root	1.132	ev_invoke_pending, ev_pending_count, together with a long example
102			about thread locking.
103	root	1.128	- add ev_timer_remaining (as requested by Denis F. Latypoff).
104			- add ev_loop_depth.
105	root	1.124	- calling ev_unloop in fork/prepare watchers will no longer poll
106			for new events.
107	root	1.115	- Denis F. Latypoff corrected many typos in example code snippets.
108			- honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
109			check that the syscall number is available before trying to
110			use it (reported by ry@tinyclouds).
111	root	1.117	- use GetSystemTimeAsFileTime instead of _timeb on windows, for
112	root	1.116	slightly higher accuracy.
113	root	1.122	- properly declare ev_loop_verify and ev_now_update even when
114			!EV_MULTIPLICITY.
115	root	1.121	- do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
116	root	1.123	- support EV_MINIMAL==2 for a reduced API.
117	root	1.125	- actually 0-initialise struct sigaction when installing signals.
118	root	1.127	- add section on hibernate and stopped processes to ev_timer docs.
119	root	1.115
120	root	1.113	3.6 Tue Apr 28 02:49:30 CEST 2009
121	root	1.107	- multiple timers becoming ready within an event loop iteration
122			will be invoked in the "correct" order now.
123	root	1.105	- do not leave the event loop early just because we have no active
124			watchers, fixing a problem when embedding a kqueue loop
125			that has active kernel events but no registered watchers
126			(reported by blacksand blacksand).
127	root	1.102	- correctly zero the idx values for arrays, so destroying and
128			reinitialising the default loop actually works (patch by
129			Malek Hadj-Ali).
130	root	1.108	- implement ev_suspend and ev_resume.
131	root	1.106	- new EV_CUSTOM revents flag for use by applications.
132	root	1.109	- add documentation section about priorites.
133			- add a glossary to the dcoumentation.
134	root	1.111	- extend the ev_fork description slightly.
135	root	1.112	- optimize a jump out of call_pending.
136	root	1.102
137	root	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
138			- fix a bug in event pipe creation on win32 that would cause a
139			failed assertion on event loop creation (patch by Malek Hadj-Ali).
140	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
141			back to gettimeofday if there is an error, to support older
142			operating systems with newer header files/libraries.
143			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
144			(default most everywhere), otherwise not.
145
146	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
147	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
148			missing (to get it to compile on QNX, reported by Rodrigo Campos).
149			- better select-nfds handling when select backend is in fd_set mode.
150			- diagnose fd_set overruns when select backend is in fd_set mode.
151			- due to a thinko, instead of disabling everything but
152			select on the borked OS X platform, everything but select was
153			allowed (reported by Emanuele Giaquinta).
154	root	1.95	- actually verify that local and remote port are matching in
155			libev's socketpair emulation, which makes denial-of-service
156			attacks harder (but not impossible - it's windows). Make sure
157	root	1.96	it even works under vista, which thinks that getpeer/sockname
158			should return fantasy port numbers.
159	root	1.100	- include "libev" in all assertion messages for potentially
160	root	1.97	clearer diagnostics.
161	root	1.98	- event_get_version (libevent compatibility) returned
162			a useless string instead of the expected version string
163			(patch by W.C.A. Wijngaards).
164	root	1.95
165	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
166	root	1.91	- fix a bug where an inotify watcher was added twice, causing
167	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
168	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
169			a direct syscall - slower, but no dependency on librt et al.
170	root	1.88	- assume negative return values != -1 signals success of port_getn
171			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
172			(no known failure reports, but it doesn't hurt).
173	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
174			automatically.
175	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
176			to make it nicer to use functors (requested by Benedek László).
177			- fixed const object callbacks in ev++.h.
178	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
179			ev_loop * in ev++.h, to avoid clashes with functor patch.
180	root	1.91	- do not try to watch the empty string via inotify.
181	root	1.92	- inotify watchers could be leaked under certain circumstances.
182			- OS X 10.5 is actually even more broken than earlier versions,
183			so fall back to select on that piece of garbage.
184	root	1.93	- fixed some weirdness in the ev_embed documentation.
185	root	1.87
186	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
187	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
188			kernels <2.6.25, or if the filesystem is not in the
189			"known to be good" list.
190	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
191			(analysed by Roger Pack).
192	root	1.85	- include stdio.h in the example program, as too many people are
193			confused by the weird C language otherwise. I guess the next thing
194			I get told is that the "..." ellipses in the examples don't compile
195			with their C compiler.
196	root	1.83
197	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
198	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
199			backend by assuming the kernel event mask hasn't changed if
200			ADD fails with EEXIST.
201	root	1.75	- work around spurious event notification bugs in epoll by using
202	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
203	root	1.78	spurious notifications or unwanted events. this is very costly,
204			but I didn't come up with this horrible design.
205	root	1.71	- use memset to initialise most arrays now and do away with the
206			init functions.
207	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
208			- drop the "struct" from all ev_watcher declarations in the
209	root	1.73	documentation and did other clarifications (yeah, it was a mistake
210			to have a struct AND a function called ev_loop).
211	root	1.74	- fix a bug where ev_default would not initialise the default
212			loop again after it was destroyed with ev_default_destroy.
213	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
214			do similar changes for event.c.
215	root	1.71
216	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
217	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
218			(reported by Yoann Vandoorselaere).
219	sf-exg	1.191	- ev_stat erroneously would try to add inotify watchers
220	root	1.68	even when inotify wasn't available (this should only
221	root	1.67	have a performance impact).
222	root	1.65	- ev_once now passes both timeout and io to the callback if both
223			occur concurrently, instead of giving timeouts precedence.
224	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
225	root	1.65
226	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
227			- embed watchers now automatically invoke ev_loop_fork on the
228			embedded loop when the parent loop forks.
229	root	1.58	- new function: ev_now_update (loop).
230	root	1.57	- verify_watcher was not marked static.
231	root	1.59	- improve the "associating..." manpage section.
232	root	1.60	- documentation tweaks here and there.
233	root	1.57
234	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
235	root	1.54	- include more include files on windows to get struct _stati64
236	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
237	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
238			Matt Tolton).
239
240	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
241	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
242			multiple times to the fd_SET, despite official MSN docs claiming
243	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
244			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
245	root	1.48	(reported any analysed by Chris Hulbert).
246	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
247			programming errors in the libev user). reported by Matt Tolton.
248			- fix a bug in fd_intern on win32 (could lead to compile errors
249			under some circumstances, but would work correctly if it compiles).
250			reported by Matt Tolton.
251	root	1.50	- (try to) work around missing lstat on windows.
252	root	1.45	- pass in the write fd set as except fd set under windows. windows
253	root	1.46	is so uncontrollably lame that it requires this. this means that
254			switching off oobinline is not supported (but tcp/ip doesn't
255			have oob, so that would be stupid anyways.
256	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
257			and some other default values.
258	root	1.45
259	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
260	root	1.46	- work around an obscure bug in winsocket select: if you
261	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
262	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
263	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
264			codesize and makes for better cache-efficiency.
265			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
266			of cpu cache lines and gives better growth behaviour than
267			2-based heaps.
268	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
269			memory accesses.
270			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
271	root	1.33	- fix a potential aliasing issue in ev_timer_again.
272	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
273			- improve ev_stat docs.
274			- add portability requirements section.
275	root	1.39	- fix manpage headers etc.
276	root	1.40	- normalise WSA error codes to lower range on windows.
277	root	1.43	- add consistency check code that can be called automatically
278			or on demand to check for internal structures (ev_loop_verify).
279	root	1.31
280	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
281			- added last minute fix for ev_poll.c by Brandon Black.
282	root	1.29
283	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
284	root	1.23	- event_base_loopexit should return 0 on success
285			(W.C.A. Wijngaards).
286	root	1.20	- added linux eventfd support.
287			- try to autodetect epoll and inotify support
288			by libc header version if not using autoconf.
289	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
290			- declare functions defined in ev.h as inline if
291			C99 or gcc are available.
292			- enable inlining with gcc versions 2 and 3.
293	root	1.25	- work around broken poll implementations potentially
294			not clearing revents field in ev_poll (Brandon Black)
295			(no such systems are known at this time).
296	root	1.23	- work around a bug in realloc on openbsd and darwin,
297	sf-exg	1.191	also makes the erroneous valgrind complaints
298	root	1.23	go away (noted by various people).
299	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
300	sf-exg	1.191	(based on patch sent by Johannes Deisenhofer).
301	root	1.26	- add sensible set method to ev::embed.
302	root	1.27	- made integer constants type int in ev.h.
303	root	1.20
304	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
305	root	1.15	- fix a 64 bit overflow issue in the select backend,
306			by using fd_mask instead of int for the mask.
307	root	1.16	- rename internal sighandler to avoid clash with very old perls.
308	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
309			flags of any outer loops anymore.
310	root	1.17	- add ev_async_pending.
311	root	1.15
312	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
313	root	1.12	- implement ev_async watchers.
314	root	1.10	- only initialise signal pipe on demand.
315			- make use of sig_atomic_t configurable.
316	root	1.14	- improved documentation.
317	root	1.10
318	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
319	root	1.6	- API/ABI bump to version 3.0.
320	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
321			- slightly improved documentation.
322	root	1.5	- speed up signal detection after a fork.
323	root	1.6	- only optionally return trace status changed in ev_child
324			watchers.
325	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
326	root	1.4
327	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
328	root	1.3	- separate Changes file.
329	root	1.2	- fix ev_path_set => ev_stat_set typo.
330			- remove event_compat.h from the libev tarball.
331			- change how include files are found.
332			- doc updates.
333			- update licenses, explicitly allow for GPL relicensing.
334
335			2.0 Sat Dec 22 17:47:03 CET 2007
336			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
337			- removed epoll from embeddable fd set.
338			- fix embed watchers.
339			- renamed ev_embed.loop to other.
340			- added exported Symbol tables.
341			- undefine member wrapper macros at the end of ev.c.
342			- respect EV_H in ev++.h.
343
344			1.86 Tue Dec 18 02:36:57 CET 2007
345			- fix memleak on loop destroy (not relevant for perl).
346
347			1.85 Fri Dec 14 20:32:40 CET 2007
348			- fix some aliasing issues w.r.t. timers and periodics
349			(not relevant for perl).
350
351			(for historic versions refer to EV/Changes, found in the Perl interface)
352
353	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
354			- original version; hacked together in <24h.
355