[ViewVC] Annotation of: cvs/libev/Changes

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

TODO: ev_time_freeze, ev_time_thaw
TODO: ev_walk
        - correctly zero the idx values for arrays, so destroying and
          reinitialising the default loop actually works (patch by
          Malek Hadj-Ali).

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:	1.103
Committed:	Mon Mar 16 21:15:06 2009 UTC (15 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.102:	+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	1.103	TODO: ev_time_freeze, ev_time_thaw
4			TODO: ev_walk
5	root	1.102	- correctly zero the idx values for arrays, so destroying and
6			reinitialising the default loop actually works (patch by
7			Malek Hadj-Ali).
8
9	root	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
10			- fix a bug in event pipe creation on win32 that would cause a
11			failed assertion on event loop creation (patch by Malek Hadj-Ali).
12	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
13			back to gettimeofday if there is an error, to support older
14			operating systems with newer header files/libraries.
15			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
16			(default most everywhere), otherwise not.
17
18	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
19	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
20			missing (to get it to compile on QNX, reported by Rodrigo Campos).
21			- better select-nfds handling when select backend is in fd_set mode.
22			- diagnose fd_set overruns when select backend is in fd_set mode.
23			- due to a thinko, instead of disabling everything but
24			select on the borked OS X platform, everything but select was
25			allowed (reported by Emanuele Giaquinta).
26	root	1.95	- actually verify that local and remote port are matching in
27			libev's socketpair emulation, which makes denial-of-service
28			attacks harder (but not impossible - it's windows). Make sure
29	root	1.96	it even works under vista, which thinks that getpeer/sockname
30			should return fantasy port numbers.
31	root	1.100	- include "libev" in all assertion messages for potentially
32	root	1.97	clearer diagnostics.
33	root	1.98	- event_get_version (libevent compatibility) returned
34			a useless string instead of the expected version string
35			(patch by W.C.A. Wijngaards).
36	root	1.95
37	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
38	root	1.91	- fix a bug where an inotify watcher was added twice, causing
39	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
40	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
41			a direct syscall - slower, but no dependency on librt et al.
42	root	1.88	- assume negative return values != -1 signals success of port_getn
43			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
44			(no known failure reports, but it doesn't hurt).
45	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
46			automatically.
47	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
48			to make it nicer to use functors (requested by Benedek László).
49			- fixed const object callbacks in ev++.h.
50	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
51			ev_loop * in ev++.h, to avoid clashes with functor patch.
52	root	1.91	- do not try to watch the empty string via inotify.
53	root	1.92	- inotify watchers could be leaked under certain circumstances.
54			- OS X 10.5 is actually even more broken than earlier versions,
55			so fall back to select on that piece of garbage.
56	root	1.93	- fixed some weirdness in the ev_embed documentation.
57	root	1.87
58	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
59	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
60			kernels <2.6.25, or if the filesystem is not in the
61			"known to be good" list.
62	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
63			(analysed by Roger Pack).
64	root	1.85	- include stdio.h in the example program, as too many people are
65			confused by the weird C language otherwise. I guess the next thing
66			I get told is that the "..." ellipses in the examples don't compile
67			with their C compiler.
68	root	1.83
69	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
70	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
71			backend by assuming the kernel event mask hasn't changed if
72			ADD fails with EEXIST.
73	root	1.75	- work around spurious event notification bugs in epoll by using
74	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
75	root	1.78	spurious notifications or unwanted events. this is very costly,
76			but I didn't come up with this horrible design.
77	root	1.71	- use memset to initialise most arrays now and do away with the
78			init functions.
79	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
80			- drop the "struct" from all ev_watcher declarations in the
81	root	1.73	documentation and did other clarifications (yeah, it was a mistake
82			to have a struct AND a function called ev_loop).
83	root	1.74	- fix a bug where ev_default would not initialise the default
84			loop again after it was destroyed with ev_default_destroy.
85	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
86			do similar changes for event.c.
87	root	1.71
88	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
89	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
90			(reported by Yoann Vandoorselaere).
91			- ev_stat errornously would try to add inotify watchers
92	root	1.68	even when inotify wasn't available (this should only
93	root	1.67	have a performance impact).
94	root	1.65	- ev_once now passes both timeout and io to the callback if both
95			occur concurrently, instead of giving timeouts precedence.
96	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
97	root	1.65
98	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
99			- embed watchers now automatically invoke ev_loop_fork on the
100			embedded loop when the parent loop forks.
101	root	1.58	- new function: ev_now_update (loop).
102	root	1.57	- verify_watcher was not marked static.
103	root	1.59	- improve the "associating..." manpage section.
104	root	1.60	- documentation tweaks here and there.
105	root	1.57
106	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
107	root	1.54	- include more include files on windows to get struct _stati64
108	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
109	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
110			Matt Tolton).
111
112	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
113	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
114			multiple times to the fd_SET, despite official MSN docs claiming
115	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
116			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
117	root	1.48	(reported any analysed by Chris Hulbert).
118	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
119			programming errors in the libev user). reported by Matt Tolton.
120			- fix a bug in fd_intern on win32 (could lead to compile errors
121			under some circumstances, but would work correctly if it compiles).
122			reported by Matt Tolton.
123	root	1.50	- (try to) work around missing lstat on windows.
124	root	1.45	- pass in the write fd set as except fd set under windows. windows
125	root	1.46	is so uncontrollably lame that it requires this. this means that
126			switching off oobinline is not supported (but tcp/ip doesn't
127			have oob, so that would be stupid anyways.
128	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
129			and some other default values.
130	root	1.45
131	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
132	root	1.46	- work around an obscure bug in winsocket select: if you
133	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
134	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
135	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
136			codesize and makes for better cache-efficiency.
137			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
138			of cpu cache lines and gives better growth behaviour than
139			2-based heaps.
140	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
141			memory accesses.
142			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
143	root	1.33	- fix a potential aliasing issue in ev_timer_again.
144	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
145			- improve ev_stat docs.
146			- add portability requirements section.
147	root	1.39	- fix manpage headers etc.
148	root	1.40	- normalise WSA error codes to lower range on windows.
149	root	1.43	- add consistency check code that can be called automatically
150			or on demand to check for internal structures (ev_loop_verify).
151	root	1.31
152	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
153			- added last minute fix for ev_poll.c by Brandon Black.
154	root	1.29
155	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
156	root	1.23	- event_base_loopexit should return 0 on success
157			(W.C.A. Wijngaards).
158	root	1.20	- added linux eventfd support.
159			- try to autodetect epoll and inotify support
160			by libc header version if not using autoconf.
161	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
162			- declare functions defined in ev.h as inline if
163			C99 or gcc are available.
164			- enable inlining with gcc versions 2 and 3.
165	root	1.25	- work around broken poll implementations potentially
166			not clearing revents field in ev_poll (Brandon Black)
167			(no such systems are known at this time).
168	root	1.23	- work around a bug in realloc on openbsd and darwin,
169			also makes the errornous valgrind complaints
170			go away (noted by various people).
171	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
172			(based on patch sent by Johannes Deisenhofer.
173			- add sensible set method to ev::embed.
174	root	1.27	- made integer constants type int in ev.h.
175	root	1.20
176	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
177	root	1.15	- fix a 64 bit overflow issue in the select backend,
178			by using fd_mask instead of int for the mask.
179	root	1.16	- rename internal sighandler to avoid clash with very old perls.
180	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
181			flags of any outer loops anymore.
182	root	1.17	- add ev_async_pending.
183	root	1.15
184	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
185	root	1.12	- implement ev_async watchers.
186	root	1.10	- only initialise signal pipe on demand.
187			- make use of sig_atomic_t configurable.
188	root	1.14	- improved documentation.
189	root	1.10
190	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
191	root	1.6	- API/ABI bump to version 3.0.
192	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
193			- slightly improved documentation.
194	root	1.5	- speed up signal detection after a fork.
195	root	1.6	- only optionally return trace status changed in ev_child
196			watchers.
197	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
198	root	1.4
199	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
200	root	1.3	- separate Changes file.
201	root	1.2	- fix ev_path_set => ev_stat_set typo.
202			- remove event_compat.h from the libev tarball.
203			- change how include files are found.
204			- doc updates.
205			- update licenses, explicitly allow for GPL relicensing.
206
207			2.0 Sat Dec 22 17:47:03 CET 2007
208			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
209			- removed epoll from embeddable fd set.
210			- fix embed watchers.
211			- renamed ev_embed.loop to other.
212			- added exported Symbol tables.
213			- undefine member wrapper macros at the end of ev.c.
214			- respect EV_H in ev++.h.
215
216			1.86 Tue Dec 18 02:36:57 CET 2007
217			- fix memleak on loop destroy (not relevant for perl).
218
219			1.85 Fri Dec 14 20:32:40 CET 2007
220			- fix some aliasing issues w.r.t. timers and periodics
221			(not relevant for perl).
222
223			(for historic versions refer to EV/Changes, found in the Perl interface)
224
225	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
226			- original version; hacked together in <24h.
227