[ViewVC] Annotation of: cvs/libev/Changes

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

        - 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 getpeername should
          return some fantasy port number.

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