[ViewVC] Annotation of: cvs/libev/Changes

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

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