[ViewVC] Annotation of: cvs/libev/Changes

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

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:	1.101
Committed:	Sun Feb 15 01:44:40 2009 UTC (15 years, 3 months ago) by root
Branch:	MAIN
CVS Tags:	rel-3_53
Changes since 1.100:	+3 -0 lines
Log Message:	3.53
#	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	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
4			- fix a bug in event pipe creation on win32 that would cause a
5			failed assertion on event loop creation (patch by Malek Hadj-Ali).
6	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
7			back to gettimeofday if there is an error, to support older
8			operating systems with newer header files/libraries.
9			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
10			(default most everywhere), otherwise not.
11
12	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
13	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
14			missing (to get it to compile on QNX, reported by Rodrigo Campos).
15			- better select-nfds handling when select backend is in fd_set mode.
16			- diagnose fd_set overruns when select backend is in fd_set mode.
17			- due to a thinko, instead of disabling everything but
18			select on the borked OS X platform, everything but select was
19			allowed (reported by Emanuele Giaquinta).
20	root	1.95	- actually verify that local and remote port are matching in
21			libev's socketpair emulation, which makes denial-of-service
22			attacks harder (but not impossible - it's windows). Make sure
23	root	1.96	it even works under vista, which thinks that getpeer/sockname
24			should return fantasy port numbers.
25	root	1.100	- include "libev" in all assertion messages for potentially
26	root	1.97	clearer diagnostics.
27	root	1.98	- event_get_version (libevent compatibility) returned
28			a useless string instead of the expected version string
29			(patch by W.C.A. Wijngaards).
30	root	1.95
31	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
32	root	1.91	- fix a bug where an inotify watcher was added twice, causing
33	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
34	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
35			a direct syscall - slower, but no dependency on librt et al.
36	root	1.88	- assume negative return values != -1 signals success of port_getn
37			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
38			(no known failure reports, but it doesn't hurt).
39	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
40			automatically.
41	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
42			to make it nicer to use functors (requested by Benedek László).
43			- fixed const object callbacks in ev++.h.
44	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
45			ev_loop * in ev++.h, to avoid clashes with functor patch.
46	root	1.91	- do not try to watch the empty string via inotify.
47	root	1.92	- inotify watchers could be leaked under certain circumstances.
48			- OS X 10.5 is actually even more broken than earlier versions,
49			so fall back to select on that piece of garbage.
50	root	1.93	- fixed some weirdness in the ev_embed documentation.
51	root	1.87
52	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
53	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
54			kernels <2.6.25, or if the filesystem is not in the
55			"known to be good" list.
56	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
57			(analysed by Roger Pack).
58	root	1.85	- include stdio.h in the example program, as too many people are
59			confused by the weird C language otherwise. I guess the next thing
60			I get told is that the "..." ellipses in the examples don't compile
61			with their C compiler.
62	root	1.83
63	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
64	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
65			backend by assuming the kernel event mask hasn't changed if
66			ADD fails with EEXIST.
67	root	1.75	- work around spurious event notification bugs in epoll by using
68	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
69	root	1.78	spurious notifications or unwanted events. this is very costly,
70			but I didn't come up with this horrible design.
71	root	1.71	- use memset to initialise most arrays now and do away with the
72			init functions.
73	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
74			- drop the "struct" from all ev_watcher declarations in the
75	root	1.73	documentation and did other clarifications (yeah, it was a mistake
76			to have a struct AND a function called ev_loop).
77	root	1.74	- fix a bug where ev_default would not initialise the default
78			loop again after it was destroyed with ev_default_destroy.
79	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
80			do similar changes for event.c.
81	root	1.71
82	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
83	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
84			(reported by Yoann Vandoorselaere).
85			- ev_stat errornously would try to add inotify watchers
86	root	1.68	even when inotify wasn't available (this should only
87	root	1.67	have a performance impact).
88	root	1.65	- ev_once now passes both timeout and io to the callback if both
89			occur concurrently, instead of giving timeouts precedence.
90	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
91	root	1.65
92	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
93			- embed watchers now automatically invoke ev_loop_fork on the
94			embedded loop when the parent loop forks.
95	root	1.58	- new function: ev_now_update (loop).
96	root	1.57	- verify_watcher was not marked static.
97	root	1.59	- improve the "associating..." manpage section.
98	root	1.60	- documentation tweaks here and there.
99	root	1.57
100	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
101	root	1.54	- include more include files on windows to get struct _stati64
102	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
103	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
104			Matt Tolton).
105
106	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
107	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
108			multiple times to the fd_SET, despite official MSN docs claiming
109	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
110			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
111	root	1.48	(reported any analysed by Chris Hulbert).
112	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
113			programming errors in the libev user). reported by Matt Tolton.
114			- fix a bug in fd_intern on win32 (could lead to compile errors
115			under some circumstances, but would work correctly if it compiles).
116			reported by Matt Tolton.
117	root	1.50	- (try to) work around missing lstat on windows.
118	root	1.45	- pass in the write fd set as except fd set under windows. windows
119	root	1.46	is so uncontrollably lame that it requires this. this means that
120			switching off oobinline is not supported (but tcp/ip doesn't
121			have oob, so that would be stupid anyways.
122	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
123			and some other default values.
124	root	1.45
125	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
126	root	1.46	- work around an obscure bug in winsocket select: if you
127	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
128	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
129	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
130			codesize and makes for better cache-efficiency.
131			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
132			of cpu cache lines and gives better growth behaviour than
133			2-based heaps.
134	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
135			memory accesses.
136			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
137	root	1.33	- fix a potential aliasing issue in ev_timer_again.
138	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
139			- improve ev_stat docs.
140			- add portability requirements section.
141	root	1.39	- fix manpage headers etc.
142	root	1.40	- normalise WSA error codes to lower range on windows.
143	root	1.43	- add consistency check code that can be called automatically
144			or on demand to check for internal structures (ev_loop_verify).
145	root	1.31
146	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
147			- added last minute fix for ev_poll.c by Brandon Black.
148	root	1.29
149	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
150	root	1.23	- event_base_loopexit should return 0 on success
151			(W.C.A. Wijngaards).
152	root	1.20	- added linux eventfd support.
153			- try to autodetect epoll and inotify support
154			by libc header version if not using autoconf.
155	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
156			- declare functions defined in ev.h as inline if
157			C99 or gcc are available.
158			- enable inlining with gcc versions 2 and 3.
159	root	1.25	- work around broken poll implementations potentially
160			not clearing revents field in ev_poll (Brandon Black)
161			(no such systems are known at this time).
162	root	1.23	- work around a bug in realloc on openbsd and darwin,
163			also makes the errornous valgrind complaints
164			go away (noted by various people).
165	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
166			(based on patch sent by Johannes Deisenhofer.
167			- add sensible set method to ev::embed.
168	root	1.27	- made integer constants type int in ev.h.
169	root	1.20
170	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
171	root	1.15	- fix a 64 bit overflow issue in the select backend,
172			by using fd_mask instead of int for the mask.
173	root	1.16	- rename internal sighandler to avoid clash with very old perls.
174	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
175			flags of any outer loops anymore.
176	root	1.17	- add ev_async_pending.
177	root	1.15
178	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
179	root	1.12	- implement ev_async watchers.
180	root	1.10	- only initialise signal pipe on demand.
181			- make use of sig_atomic_t configurable.
182	root	1.14	- improved documentation.
183	root	1.10
184	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
185	root	1.6	- API/ABI bump to version 3.0.
186	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
187			- slightly improved documentation.
188	root	1.5	- speed up signal detection after a fork.
189	root	1.6	- only optionally return trace status changed in ev_child
190			watchers.
191	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
192	root	1.4
193	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
194	root	1.3	- separate Changes file.
195	root	1.2	- fix ev_path_set => ev_stat_set typo.
196			- remove event_compat.h from the libev tarball.
197			- change how include files are found.
198			- doc updates.
199			- update licenses, explicitly allow for GPL relicensing.
200
201			2.0 Sat Dec 22 17:47:03 CET 2007
202			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
203			- removed epoll from embeddable fd set.
204			- fix embed watchers.
205			- renamed ev_embed.loop to other.
206			- added exported Symbol tables.
207			- undefine member wrapper macros at the end of ev.c.
208			- respect EV_H in ev++.h.
209
210			1.86 Tue Dec 18 02:36:57 CET 2007
211			- fix memleak on loop destroy (not relevant for perl).
212
213			1.85 Fri Dec 14 20:32:40 CET 2007
214			- fix some aliasing issues w.r.t. timers and periodics
215			(not relevant for perl).
216
217			(for historic versions refer to EV/Changes, found in the Perl interface)
218
219	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
220			- original version; hacked together in <24h.
221