[ViewVC] Annotation of: cvs/libev/Changes

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

        - backport inotify code to C89.
        - 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).
        - point out the unspecified signal mask in the documentation.

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