[ViewVC] Annotation of: cvs/libev/Changes

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

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