[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.
        - changed minimum glibc requirement from glibc 2.9 to 2.7, for
          signalfd.

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