[ViewVC] Annotation of: cvs/libev/Changes

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

TODO: ev_walk
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:	1.114
Committed:	Tue Apr 28 00:50:57 2009 UTC (15 years ago) by root
Branch:	MAIN
Changes since 1.113:	+1 -0 lines
Log Message:	3.6
#	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	1.114	TODO: ev_walk
4	root	1.113	3.6 Tue Apr 28 02:49:30 CEST 2009
5	root	1.107	- multiple timers becoming ready within an event loop iteration
6			will be invoked in the "correct" order now.
7	root	1.105	- do not leave the event loop early just because we have no active
8			watchers, fixing a problem when embedding a kqueue loop
9			that has active kernel events but no registered watchers
10			(reported by blacksand blacksand).
11	root	1.102	- correctly zero the idx values for arrays, so destroying and
12			reinitialising the default loop actually works (patch by
13			Malek Hadj-Ali).
14	root	1.108	- implement ev_suspend and ev_resume.
15	root	1.106	- new EV_CUSTOM revents flag for use by applications.
16	root	1.109	- add documentation section about priorites.
17			- add a glossary to the dcoumentation.
18	root	1.111	- extend the ev_fork description slightly.
19	root	1.112	- optimize a jump out of call_pending.
20	root	1.102
21	root	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
22			- fix a bug in event pipe creation on win32 that would cause a
23			failed assertion on event loop creation (patch by Malek Hadj-Ali).
24	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
25			back to gettimeofday if there is an error, to support older
26			operating systems with newer header files/libraries.
27			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
28			(default most everywhere), otherwise not.
29
30	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
31	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
32			missing (to get it to compile on QNX, reported by Rodrigo Campos).
33			- better select-nfds handling when select backend is in fd_set mode.
34			- diagnose fd_set overruns when select backend is in fd_set mode.
35			- due to a thinko, instead of disabling everything but
36			select on the borked OS X platform, everything but select was
37			allowed (reported by Emanuele Giaquinta).
38	root	1.95	- actually verify that local and remote port are matching in
39			libev's socketpair emulation, which makes denial-of-service
40			attacks harder (but not impossible - it's windows). Make sure
41	root	1.96	it even works under vista, which thinks that getpeer/sockname
42			should return fantasy port numbers.
43	root	1.100	- include "libev" in all assertion messages for potentially
44	root	1.97	clearer diagnostics.
45	root	1.98	- event_get_version (libevent compatibility) returned
46			a useless string instead of the expected version string
47			(patch by W.C.A. Wijngaards).
48	root	1.95
49	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
50	root	1.91	- fix a bug where an inotify watcher was added twice, causing
51	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
52	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
53			a direct syscall - slower, but no dependency on librt et al.
54	root	1.88	- assume negative return values != -1 signals success of port_getn
55			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
56			(no known failure reports, but it doesn't hurt).
57	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
58			automatically.
59	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
60			to make it nicer to use functors (requested by Benedek László).
61			- fixed const object callbacks in ev++.h.
62	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
63			ev_loop * in ev++.h, to avoid clashes with functor patch.
64	root	1.91	- do not try to watch the empty string via inotify.
65	root	1.92	- inotify watchers could be leaked under certain circumstances.
66			- OS X 10.5 is actually even more broken than earlier versions,
67			so fall back to select on that piece of garbage.
68	root	1.93	- fixed some weirdness in the ev_embed documentation.
69	root	1.87
70	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
71	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
72			kernels <2.6.25, or if the filesystem is not in the
73			"known to be good" list.
74	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
75			(analysed by Roger Pack).
76	root	1.85	- include stdio.h in the example program, as too many people are
77			confused by the weird C language otherwise. I guess the next thing
78			I get told is that the "..." ellipses in the examples don't compile
79			with their C compiler.
80	root	1.83
81	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
82	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
83			backend by assuming the kernel event mask hasn't changed if
84			ADD fails with EEXIST.
85	root	1.75	- work around spurious event notification bugs in epoll by using
86	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
87	root	1.78	spurious notifications or unwanted events. this is very costly,
88			but I didn't come up with this horrible design.
89	root	1.71	- use memset to initialise most arrays now and do away with the
90			init functions.
91	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
92			- drop the "struct" from all ev_watcher declarations in the
93	root	1.73	documentation and did other clarifications (yeah, it was a mistake
94			to have a struct AND a function called ev_loop).
95	root	1.74	- fix a bug where ev_default would not initialise the default
96			loop again after it was destroyed with ev_default_destroy.
97	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
98			do similar changes for event.c.
99	root	1.71
100	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
101	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
102			(reported by Yoann Vandoorselaere).
103			- ev_stat errornously would try to add inotify watchers
104	root	1.68	even when inotify wasn't available (this should only
105	root	1.67	have a performance impact).
106	root	1.65	- ev_once now passes both timeout and io to the callback if both
107			occur concurrently, instead of giving timeouts precedence.
108	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
109	root	1.65
110	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
111			- embed watchers now automatically invoke ev_loop_fork on the
112			embedded loop when the parent loop forks.
113	root	1.58	- new function: ev_now_update (loop).
114	root	1.57	- verify_watcher was not marked static.
115	root	1.59	- improve the "associating..." manpage section.
116	root	1.60	- documentation tweaks here and there.
117	root	1.57
118	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
119	root	1.54	- include more include files on windows to get struct _stati64
120	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
121	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
122			Matt Tolton).
123
124	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
125	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
126			multiple times to the fd_SET, despite official MSN docs claiming
127	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
128			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
129	root	1.48	(reported any analysed by Chris Hulbert).
130	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
131			programming errors in the libev user). reported by Matt Tolton.
132			- fix a bug in fd_intern on win32 (could lead to compile errors
133			under some circumstances, but would work correctly if it compiles).
134			reported by Matt Tolton.
135	root	1.50	- (try to) work around missing lstat on windows.
136	root	1.45	- pass in the write fd set as except fd set under windows. windows
137	root	1.46	is so uncontrollably lame that it requires this. this means that
138			switching off oobinline is not supported (but tcp/ip doesn't
139			have oob, so that would be stupid anyways.
140	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
141			and some other default values.
142	root	1.45
143	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
144	root	1.46	- work around an obscure bug in winsocket select: if you
145	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
146	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
147	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
148			codesize and makes for better cache-efficiency.
149			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
150			of cpu cache lines and gives better growth behaviour than
151			2-based heaps.
152	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
153			memory accesses.
154			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
155	root	1.33	- fix a potential aliasing issue in ev_timer_again.
156	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
157			- improve ev_stat docs.
158			- add portability requirements section.
159	root	1.39	- fix manpage headers etc.
160	root	1.40	- normalise WSA error codes to lower range on windows.
161	root	1.43	- add consistency check code that can be called automatically
162			or on demand to check for internal structures (ev_loop_verify).
163	root	1.31
164	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
165			- added last minute fix for ev_poll.c by Brandon Black.
166	root	1.29
167	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
168	root	1.23	- event_base_loopexit should return 0 on success
169			(W.C.A. Wijngaards).
170	root	1.20	- added linux eventfd support.
171			- try to autodetect epoll and inotify support
172			by libc header version if not using autoconf.
173	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
174			- declare functions defined in ev.h as inline if
175			C99 or gcc are available.
176			- enable inlining with gcc versions 2 and 3.
177	root	1.25	- work around broken poll implementations potentially
178			not clearing revents field in ev_poll (Brandon Black)
179			(no such systems are known at this time).
180	root	1.23	- work around a bug in realloc on openbsd and darwin,
181			also makes the errornous valgrind complaints
182			go away (noted by various people).
183	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
184			(based on patch sent by Johannes Deisenhofer.
185			- add sensible set method to ev::embed.
186	root	1.27	- made integer constants type int in ev.h.
187	root	1.20
188	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
189	root	1.15	- fix a 64 bit overflow issue in the select backend,
190			by using fd_mask instead of int for the mask.
191	root	1.16	- rename internal sighandler to avoid clash with very old perls.
192	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
193			flags of any outer loops anymore.
194	root	1.17	- add ev_async_pending.
195	root	1.15
196	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
197	root	1.12	- implement ev_async watchers.
198	root	1.10	- only initialise signal pipe on demand.
199			- make use of sig_atomic_t configurable.
200	root	1.14	- improved documentation.
201	root	1.10
202	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
203	root	1.6	- API/ABI bump to version 3.0.
204	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
205			- slightly improved documentation.
206	root	1.5	- speed up signal detection after a fork.
207	root	1.6	- only optionally return trace status changed in ev_child
208			watchers.
209	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
210	root	1.4
211	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
212	root	1.3	- separate Changes file.
213	root	1.2	- fix ev_path_set => ev_stat_set typo.
214			- remove event_compat.h from the libev tarball.
215			- change how include files are found.
216			- doc updates.
217			- update licenses, explicitly allow for GPL relicensing.
218
219			2.0 Sat Dec 22 17:47:03 CET 2007
220			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
221			- removed epoll from embeddable fd set.
222			- fix embed watchers.
223			- renamed ev_embed.loop to other.
224			- added exported Symbol tables.
225			- undefine member wrapper macros at the end of ev.c.
226			- respect EV_H in ev++.h.
227
228			1.86 Tue Dec 18 02:36:57 CET 2007
229			- fix memleak on loop destroy (not relevant for perl).
230
231			1.85 Fri Dec 14 20:32:40 CET 2007
232			- fix some aliasing issues w.r.t. timers and periodics
233			(not relevant for perl).
234
235			(for historic versions refer to EV/Changes, found in the Perl interface)
236
237	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
238			- original version; hacked together in <24h.
239