[ViewVC] Annotation of: cvs/libev/Changes

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

TODO: include ev_xyz_start in each example?
TODO: ev_pdef stupid idea?
TODO: EVRUN_XXX?
        - "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.
        - 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.
        - 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++.

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:	1.195
Committed:	Fri Oct 22 10:09:12 2010 UTC (13 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.194:	+1 -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	1.180	TODO: include ev_xyz_start in each example?
4	root	1.194	TODO: ev_pdef stupid idea?
5			TODO: EVRUN_XXX?
6	root	1.171	- "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
7	root	1.161	- ev_embed_stop did not correctly stop the watcher (very good
8			testcase by Vladimir Timofeev).
9	sf-exg	1.191	- ev_run will now always update the current loop time - it erroneously
10	root	1.187	didn't when idle watchers were active, causing timers not to fire.
11	root	1.179	- fix a bug where a timeout of zero caused the timer not to fire
12			in the libevent emulation (testcase by Péter Szabó).
13	root	1.164	- applied win32 fixes by Michael Lenaghan (also James Mansion).
14	root	1.166	- replace EV_MINIMAL by EV_FEATURES.
15	root	1.178	- prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
16			seems the former is much faster than the latter.
17	root	1.185	- reduce the number of spurious wake-ups with the ports backend.
18	root	1.158	- remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
19	root	1.186	- do async init within ev_async_start, not ev_async_set, which avoids
20			an API quirk where the set function must be called in the C++ API
21			even when there is nothing to set.
22	root	1.174	- add (undocumented) EV_ENABLE when adding events with kqueue,
23	root	1.175	this might help with OS X, which seems to need it despite documenting
24			not to need it (helpfully pointed out by Tilghman Lesher).
25	root	1.176	- do not use poll by default on freebsd, it's broken (what isn't
26			on freebsd...).
27	root	1.195	- allow to embed epoll on kernels >= 2.6.32.
28	root	1.159	- configure now prepends -O3, not appends it, so one can still
29			override it.
30	root	1.190	- ev.pod: greatly expanded the portability section, added a porting
31			section, a description of watcher states and made lots of minor fixes.
32	root	1.160	- disable poll backend on AIX, the poll header spams the namespace
33			and it's not worth working around dead platforms (reported
34			and analyzed by Aivars Kalvans).
35	root	1.162	- improve header file compatibility of the standalone eventfd code
36			in an obscure case.
37	root	1.163	- implement EV_AVOID_STDIO option.
38			- do not use sscanf to parse linux version number (smaller, faster,
39			no sscanf dependency).
40	root	1.164	- new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
41	sf-exg	1.172	- update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
42	root	1.165	- add section on accept() problems to the manpage.
43	root	1.168	- rename EV_TIMEOUT to EV_TIMER.
44	root	1.190	- rename ev_loop_count/depth/verify/loop/unloop.
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	1.157
53	root	1.156	3.9 Thu Dec 31 07:59:59 CET 2009
54	root	1.155	- signalfd is no longer used by default and has to be requested
55			explicitly - this means that easy to catch bugs become hard to
56			catch race conditions, but the users have spoken.
57			- point out the unspecified signal mask in the documentation, and
58			that this is a race condition regardless of EV_SIGNALFD.
59	root	1.142	- backport inotify code to C89.
60	root	1.148	- inotify file descriptors could leak into child processes.
61	root	1.151	- ev_stat watchers could keep an errornous extra ref on the loop,
62			preventing exit when unregistering all watchers (testcases
63	root	1.150	provided by ry@tinyclouds.org).
64	root	1.143	- implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
65	root	1.145	symbols to make it easier for apps to do their own fd management.
66	root	1.144	- support EV_IDLE_ENABLE being disabled in ev++.h
67			(patch by Didier Spezia).
68	root	1.147	- take advantage of inotify_init1, if available, to set cloexec/nonblock
69			on fd creation, to avoid races.
70	root	1.150	- the signal handling pipe wasn't always initialised under windows
71			(analysed by lekma).
72	root	1.146	- changed minimum glibc requirement from glibc 2.9 to 2.7, for
73			signalfd.
74	root	1.152	- add missing string.h include (Denis F. Latypoff).
75	root	1.153	- only replace ev_stat.prev when we detect an actual difference,
76			so prev is (almost) always different to attr. this might
77	sf-exg	1.191	have caused the problems with 04_stat.t.
78	root	1.154	- add ev::timer->remaining () method to C++ API.
79	root	1.142
80	root	1.141	3.8 Sun Aug 9 14:30:45 CEST 2009
81	root	1.133	- incompatible change: do not necessarily reset signal handler
82			to SIG_DFL when a sighandler is stopped.
83	root	1.135	- ev_default_destroy did not properly free or zero some members,
84	sf-exg	1.191	potentially causing crashes and memory corruption on repeated
85	root	1.134	ev_default_destroy/ev_default_loop calls.
86	root	1.133	- take advantage of signalfd on GNU/Linux systems.
87			- document that the signal mask might be in an unspecified
88			state when using libev's signal handling.
89	root	1.136	- take advantage of some GNU/Linux calls to set cloexec/nonblock
90			on fd creation, to avoid race conditions.
91	root	1.132
92	root	1.131	3.7 Fri Jul 17 16:36:32 CEST 2009
93	root	1.128	- ev_unloop and ev_loop wrongly used a global variable to exit loops,
94			instead of using a per-loop variable (bug caught by accident...).
95			- the ev_set_io_collect_interval interpretation has changed.
96			- add new functionality: ev_set_userdata, ev_userdata,
97	root	1.126	ev_set_invoke_pending_cb, ev_set_loop_release_cb,
98	root	1.132	ev_invoke_pending, ev_pending_count, together with a long example
99			about thread locking.
100	root	1.128	- add ev_timer_remaining (as requested by Denis F. Latypoff).
101			- add ev_loop_depth.
102	root	1.124	- calling ev_unloop in fork/prepare watchers will no longer poll
103			for new events.
104	root	1.115	- Denis F. Latypoff corrected many typos in example code snippets.
105			- honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
106			check that the syscall number is available before trying to
107			use it (reported by ry@tinyclouds).
108	root	1.117	- use GetSystemTimeAsFileTime instead of _timeb on windows, for
109	root	1.116	slightly higher accuracy.
110	root	1.122	- properly declare ev_loop_verify and ev_now_update even when
111			!EV_MULTIPLICITY.
112	root	1.121	- do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
113	root	1.123	- support EV_MINIMAL==2 for a reduced API.
114	root	1.125	- actually 0-initialise struct sigaction when installing signals.
115	root	1.127	- add section on hibernate and stopped processes to ev_timer docs.
116	root	1.115
117	root	1.113	3.6 Tue Apr 28 02:49:30 CEST 2009
118	root	1.107	- multiple timers becoming ready within an event loop iteration
119			will be invoked in the "correct" order now.
120	root	1.105	- do not leave the event loop early just because we have no active
121			watchers, fixing a problem when embedding a kqueue loop
122			that has active kernel events but no registered watchers
123			(reported by blacksand blacksand).
124	root	1.102	- correctly zero the idx values for arrays, so destroying and
125			reinitialising the default loop actually works (patch by
126			Malek Hadj-Ali).
127	root	1.108	- implement ev_suspend and ev_resume.
128	root	1.106	- new EV_CUSTOM revents flag for use by applications.
129	root	1.109	- add documentation section about priorites.
130			- add a glossary to the dcoumentation.
131	root	1.111	- extend the ev_fork description slightly.
132	root	1.112	- optimize a jump out of call_pending.
133	root	1.102
134	root	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
135			- fix a bug in event pipe creation on win32 that would cause a
136			failed assertion on event loop creation (patch by Malek Hadj-Ali).
137	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
138			back to gettimeofday if there is an error, to support older
139			operating systems with newer header files/libraries.
140			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
141			(default most everywhere), otherwise not.
142
143	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
144	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
145			missing (to get it to compile on QNX, reported by Rodrigo Campos).
146			- better select-nfds handling when select backend is in fd_set mode.
147			- diagnose fd_set overruns when select backend is in fd_set mode.
148			- due to a thinko, instead of disabling everything but
149			select on the borked OS X platform, everything but select was
150			allowed (reported by Emanuele Giaquinta).
151	root	1.95	- actually verify that local and remote port are matching in
152			libev's socketpair emulation, which makes denial-of-service
153			attacks harder (but not impossible - it's windows). Make sure
154	root	1.96	it even works under vista, which thinks that getpeer/sockname
155			should return fantasy port numbers.
156	root	1.100	- include "libev" in all assertion messages for potentially
157	root	1.97	clearer diagnostics.
158	root	1.98	- event_get_version (libevent compatibility) returned
159			a useless string instead of the expected version string
160			(patch by W.C.A. Wijngaards).
161	root	1.95
162	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
163	root	1.91	- fix a bug where an inotify watcher was added twice, causing
164	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
165	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
166			a direct syscall - slower, but no dependency on librt et al.
167	root	1.88	- assume negative return values != -1 signals success of port_getn
168			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
169			(no known failure reports, but it doesn't hurt).
170	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
171			automatically.
172	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
173			to make it nicer to use functors (requested by Benedek László).
174			- fixed const object callbacks in ev++.h.
175	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
176			ev_loop * in ev++.h, to avoid clashes with functor patch.
177	root	1.91	- do not try to watch the empty string via inotify.
178	root	1.92	- inotify watchers could be leaked under certain circumstances.
179			- OS X 10.5 is actually even more broken than earlier versions,
180			so fall back to select on that piece of garbage.
181	root	1.93	- fixed some weirdness in the ev_embed documentation.
182	root	1.87
183	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
184	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
185			kernels <2.6.25, or if the filesystem is not in the
186			"known to be good" list.
187	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
188			(analysed by Roger Pack).
189	root	1.85	- include stdio.h in the example program, as too many people are
190			confused by the weird C language otherwise. I guess the next thing
191			I get told is that the "..." ellipses in the examples don't compile
192			with their C compiler.
193	root	1.83
194	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
195	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
196			backend by assuming the kernel event mask hasn't changed if
197			ADD fails with EEXIST.
198	root	1.75	- work around spurious event notification bugs in epoll by using
199	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
200	root	1.78	spurious notifications or unwanted events. this is very costly,
201			but I didn't come up with this horrible design.
202	root	1.71	- use memset to initialise most arrays now and do away with the
203			init functions.
204	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
205			- drop the "struct" from all ev_watcher declarations in the
206	root	1.73	documentation and did other clarifications (yeah, it was a mistake
207			to have a struct AND a function called ev_loop).
208	root	1.74	- fix a bug where ev_default would not initialise the default
209			loop again after it was destroyed with ev_default_destroy.
210	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
211			do similar changes for event.c.
212	root	1.71
213	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
214	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
215			(reported by Yoann Vandoorselaere).
216	sf-exg	1.191	- ev_stat erroneously would try to add inotify watchers
217	root	1.68	even when inotify wasn't available (this should only
218	root	1.67	have a performance impact).
219	root	1.65	- ev_once now passes both timeout and io to the callback if both
220			occur concurrently, instead of giving timeouts precedence.
221	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
222	root	1.65
223	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
224			- embed watchers now automatically invoke ev_loop_fork on the
225			embedded loop when the parent loop forks.
226	root	1.58	- new function: ev_now_update (loop).
227	root	1.57	- verify_watcher was not marked static.
228	root	1.59	- improve the "associating..." manpage section.
229	root	1.60	- documentation tweaks here and there.
230	root	1.57
231	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
232	root	1.54	- include more include files on windows to get struct _stati64
233	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
234	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
235			Matt Tolton).
236
237	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
238	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
239			multiple times to the fd_SET, despite official MSN docs claiming
240	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
241			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
242	root	1.48	(reported any analysed by Chris Hulbert).
243	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
244			programming errors in the libev user). reported by Matt Tolton.
245			- fix a bug in fd_intern on win32 (could lead to compile errors
246			under some circumstances, but would work correctly if it compiles).
247			reported by Matt Tolton.
248	root	1.50	- (try to) work around missing lstat on windows.
249	root	1.45	- pass in the write fd set as except fd set under windows. windows
250	root	1.46	is so uncontrollably lame that it requires this. this means that
251			switching off oobinline is not supported (but tcp/ip doesn't
252			have oob, so that would be stupid anyways.
253	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
254			and some other default values.
255	root	1.45
256	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
257	root	1.46	- work around an obscure bug in winsocket select: if you
258	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
259	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
260	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
261			codesize and makes for better cache-efficiency.
262			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
263			of cpu cache lines and gives better growth behaviour than
264			2-based heaps.
265	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
266			memory accesses.
267			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
268	root	1.33	- fix a potential aliasing issue in ev_timer_again.
269	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
270			- improve ev_stat docs.
271			- add portability requirements section.
272	root	1.39	- fix manpage headers etc.
273	root	1.40	- normalise WSA error codes to lower range on windows.
274	root	1.43	- add consistency check code that can be called automatically
275			or on demand to check for internal structures (ev_loop_verify).
276	root	1.31
277	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
278			- added last minute fix for ev_poll.c by Brandon Black.
279	root	1.29
280	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
281	root	1.23	- event_base_loopexit should return 0 on success
282			(W.C.A. Wijngaards).
283	root	1.20	- added linux eventfd support.
284			- try to autodetect epoll and inotify support
285			by libc header version if not using autoconf.
286	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
287			- declare functions defined in ev.h as inline if
288			C99 or gcc are available.
289			- enable inlining with gcc versions 2 and 3.
290	root	1.25	- work around broken poll implementations potentially
291			not clearing revents field in ev_poll (Brandon Black)
292			(no such systems are known at this time).
293	root	1.23	- work around a bug in realloc on openbsd and darwin,
294	sf-exg	1.191	also makes the erroneous valgrind complaints
295	root	1.23	go away (noted by various people).
296	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
297	sf-exg	1.191	(based on patch sent by Johannes Deisenhofer).
298	root	1.26	- add sensible set method to ev::embed.
299	root	1.27	- made integer constants type int in ev.h.
300	root	1.20
301	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
302	root	1.15	- fix a 64 bit overflow issue in the select backend,
303			by using fd_mask instead of int for the mask.
304	root	1.16	- rename internal sighandler to avoid clash with very old perls.
305	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
306			flags of any outer loops anymore.
307	root	1.17	- add ev_async_pending.
308	root	1.15
309	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
310	root	1.12	- implement ev_async watchers.
311	root	1.10	- only initialise signal pipe on demand.
312			- make use of sig_atomic_t configurable.
313	root	1.14	- improved documentation.
314	root	1.10
315	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
316	root	1.6	- API/ABI bump to version 3.0.
317	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
318			- slightly improved documentation.
319	root	1.5	- speed up signal detection after a fork.
320	root	1.6	- only optionally return trace status changed in ev_child
321			watchers.
322	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
323	root	1.4
324	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
325	root	1.3	- separate Changes file.
326	root	1.2	- fix ev_path_set => ev_stat_set typo.
327			- remove event_compat.h from the libev tarball.
328			- change how include files are found.
329			- doc updates.
330			- update licenses, explicitly allow for GPL relicensing.
331
332			2.0 Sat Dec 22 17:47:03 CET 2007
333			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
334			- removed epoll from embeddable fd set.
335			- fix embed watchers.
336			- renamed ev_embed.loop to other.
337			- added exported Symbol tables.
338			- undefine member wrapper macros at the end of ev.c.
339			- respect EV_H in ev++.h.
340
341			1.86 Tue Dec 18 02:36:57 CET 2007
342			- fix memleak on loop destroy (not relevant for perl).
343
344			1.85 Fri Dec 14 20:32:40 CET 2007
345			- fix some aliasing issues w.r.t. timers and periodics
346			(not relevant for perl).
347
348			(for historic versions refer to EV/Changes, found in the Perl interface)
349
350	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
351			- original version; hacked together in <24h.
352