[ViewVC] Annotation of: cvs/libev/Changes

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

TODO: ev_walk
TODO: ev_stop_all docs
TODO: priority/idle docs
TODO: fix signal handling(?) under win32
3.54
        - 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.

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:	1.108
Committed:	Wed Apr 15 19:35:53 2009 UTC (15 years, 1 month ago) by root
Branch:	MAIN
Changes since 1.107:	+3 -2 lines
Log Message:	resume/suspend
#	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	1.103	TODO: ev_walk
4	root	1.108	TODO: ev_stop_all docs
5			TODO: priority/idle docs
6	root	1.104	TODO: fix signal handling(?) under win32
7	root	1.106	3.54
8	root	1.107	- multiple timers becoming ready within an event loop iteration
9			will be invoked in the "correct" order now.
10	root	1.105	- do not leave the event loop early just because we have no active
11			watchers, fixing a problem when embedding a kqueue loop
12			that has active kernel events but no registered watchers
13			(reported by blacksand blacksand).
14	root	1.102	- correctly zero the idx values for arrays, so destroying and
15			reinitialising the default loop actually works (patch by
16			Malek Hadj-Ali).
17	root	1.108	- implement ev_suspend and ev_resume.
18	root	1.106	- new EV_CUSTOM revents flag for use by applications.
19	root	1.102
20	root	1.101	3.53 Sun Feb 15 02:38:20 CET 2009
21			- fix a bug in event pipe creation on win32 that would cause a
22			failed assertion on event loop creation (patch by Malek Hadj-Ali).
23	root	1.100	- probe for CLOCK_REALTIME support at runtime as well and fall
24			back to gettimeofday if there is an error, to support older
25			operating systems with newer header files/libraries.
26			- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
27			(default most everywhere), otherwise not.
28
29	root	1.99	3.52 Wed Jan 7 21:43:02 CET 2009
30	root	1.97	- fix compilation of select backend in fd_set mode when NFDBITS is
31			missing (to get it to compile on QNX, reported by Rodrigo Campos).
32			- better select-nfds handling when select backend is in fd_set mode.
33			- diagnose fd_set overruns when select backend is in fd_set mode.
34			- due to a thinko, instead of disabling everything but
35			select on the borked OS X platform, everything but select was
36			allowed (reported by Emanuele Giaquinta).
37	root	1.95	- actually verify that local and remote port are matching in
38			libev's socketpair emulation, which makes denial-of-service
39			attacks harder (but not impossible - it's windows). Make sure
40	root	1.96	it even works under vista, which thinks that getpeer/sockname
41			should return fantasy port numbers.
42	root	1.100	- include "libev" in all assertion messages for potentially
43	root	1.97	clearer diagnostics.
44	root	1.98	- event_get_version (libevent compatibility) returned
45			a useless string instead of the expected version string
46			(patch by W.C.A. Wijngaards).
47	root	1.95
48	root	1.94	3.51 Wed Dec 24 23:00:11 CET 2008
49	root	1.91	- fix a bug where an inotify watcher was added twice, causing
50	root	1.92	freezes on hash collisions (reported and analysed by Graham Leggett).
51	root	1.87	- new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
52			a direct syscall - slower, but no dependency on librt et al.
53	root	1.88	- assume negative return values != -1 signals success of port_getn
54			(http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
55			(no known failure reports, but it doesn't hurt).
56	root	1.93	- fork detection in ev_embed now stops and restarts the watcher
57			automatically.
58	root	1.89	- EXPERIMENTAL: default the method to operator () in ev++.h,
59			to make it nicer to use functors (requested by Benedek László).
60			- fixed const object callbacks in ev++.h.
61	root	1.90	- replaced loop_ref argument of watcher.set (loop) by a direct
62			ev_loop * in ev++.h, to avoid clashes with functor patch.
63	root	1.91	- do not try to watch the empty string via inotify.
64	root	1.92	- inotify watchers could be leaked under certain circumstances.
65			- OS X 10.5 is actually even more broken than earlier versions,
66			so fall back to select on that piece of garbage.
67	root	1.93	- fixed some weirdness in the ev_embed documentation.
68	root	1.87
69	root	1.86	3.49 Wed Nov 19 11:26:53 CET 2008
70	root	1.83	- ev_stat watchers will now use inotify as a mere hint on
71			kernels <2.6.25, or if the filesystem is not in the
72			"known to be good" list.
73	root	1.84	- better mingw32 compatibility (it's not as borked as native win32)
74			(analysed by Roger Pack).
75	root	1.85	- include stdio.h in the example program, as too many people are
76			confused by the weird C language otherwise. I guess the next thing
77			I get told is that the "..." ellipses in the examples don't compile
78			with their C compiler.
79	root	1.83
80	root	1.80	3.48 Thu Oct 30 09:02:37 CET 2008
81	root	1.71	- further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
82			backend by assuming the kernel event mask hasn't changed if
83			ADD fails with EEXIST.
84	root	1.75	- work around spurious event notification bugs in epoll by using
85	root	1.77	a 32-bit generation counter. recreate kernel state if we receive
86	root	1.78	spurious notifications or unwanted events. this is very costly,
87			but I didn't come up with this horrible design.
88	root	1.71	- use memset to initialise most arrays now and do away with the
89			init functions.
90	root	1.72	- expand time-out strategies into a "Be smart about timeouts" section.
91			- drop the "struct" from all ev_watcher declarations in the
92	root	1.73	documentation and did other clarifications (yeah, it was a mistake
93			to have a struct AND a function called ev_loop).
94	root	1.74	- fix a bug where ev_default would not initialise the default
95			loop again after it was destroyed with ev_default_destroy.
96	root	1.79	- rename syserr to ev_syserr to avoid name clashes when embedding,
97			do similar changes for event.c.
98	root	1.71
99	root	1.69	3.45 Tue Oct 21 21:59:26 CEST 2008
100	root	1.67	- disable inotify usage on linux <2.6.25, as it is broken
101			(reported by Yoann Vandoorselaere).
102			- ev_stat errornously would try to add inotify watchers
103	root	1.68	even when inotify wasn't available (this should only
104	root	1.67	have a performance impact).
105	root	1.65	- ev_once now passes both timeout and io to the callback if both
106			occur concurrently, instead of giving timeouts precedence.
107	root	1.66	- disable EV_USE_INOTIFY when sys/inotify.h is too old.
108	root	1.65
109	root	1.62	3.44 Mon Sep 29 05:18:39 CEST 2008
110			- embed watchers now automatically invoke ev_loop_fork on the
111			embedded loop when the parent loop forks.
112	root	1.58	- new function: ev_now_update (loop).
113	root	1.57	- verify_watcher was not marked static.
114	root	1.59	- improve the "associating..." manpage section.
115	root	1.60	- documentation tweaks here and there.
116	root	1.57
117	root	1.56	3.43 Sun Jul 6 05:34:41 CEST 2008
118	root	1.54	- include more include files on windows to get struct _stati64
119	root	1.56	(reported by Chris Hulbert, but doesn't quite fix his issue).
120	root	1.53	- add missing #include <io.h> in ev.c on windows (reported by
121			Matt Tolton).
122
123	root	1.52	3.42 Tue Jun 17 12:12:07 CEST 2008
124	root	1.50	- work around yet another windows bug: FD_SET actually adds fd's
125			multiple times to the fd_SET, despite official MSN docs claiming
126	root	1.51	otherwise. Reported and well-analysed by Matt Tolton.
127			- define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
128	root	1.48	(reported any analysed by Chris Hulbert).
129	root	1.49	- fix a bug in ev_ebadf (this function is only used to catch
130			programming errors in the libev user). reported by Matt Tolton.
131			- fix a bug in fd_intern on win32 (could lead to compile errors
132			under some circumstances, but would work correctly if it compiles).
133			reported by Matt Tolton.
134	root	1.50	- (try to) work around missing lstat on windows.
135	root	1.45	- pass in the write fd set as except fd set under windows. windows
136	root	1.46	is so uncontrollably lame that it requires this. this means that
137			switching off oobinline is not supported (but tcp/ip doesn't
138			have oob, so that would be stupid anyways.
139	root	1.47	- use posix module symbol to auto-detect monotonic clock presence
140			and some other default values.
141	root	1.45
142	root	1.44	3.41 Fri May 23 18:42:54 CEST 2008
143	root	1.46	- work around an obscure bug in winsocket select: if you
144	root	1.40	provide only empty fd sets then select returns WSAEINVAL. how sucky.
145	root	1.41	- improve timer scheduling stability and reduce use of time_epsilon.
146	root	1.36	- use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
147			codesize and makes for better cache-efficiency.
148			- use 3-based 4-heap for !EV_MINIMAL. this makes better use
149			of cpu cache lines and gives better growth behaviour than
150			2-based heaps.
151	root	1.38	- cache timestamp within heap for !EV_MINIMAL, to avoid random
152			memory accesses.
153			- document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
154	root	1.33	- fix a potential aliasing issue in ev_timer_again.
155	root	1.35	- add/document ev_periodic_at, retract direct access to ->at.
156			- improve ev_stat docs.
157			- add portability requirements section.
158	root	1.39	- fix manpage headers etc.
159	root	1.40	- normalise WSA error codes to lower range on windows.
160	root	1.43	- add consistency check code that can be called automatically
161			or on demand to check for internal structures (ev_loop_verify).
162	root	1.31
163	root	1.30	3.31 Wed Apr 16 20:45:04 CEST 2008
164			- added last minute fix for ev_poll.c by Brandon Black.
165	root	1.29
166	root	1.28	3.3 Wed Apr 16 19:04:10 CEST 2008
167	root	1.23	- event_base_loopexit should return 0 on success
168			(W.C.A. Wijngaards).
169	root	1.20	- added linux eventfd support.
170			- try to autodetect epoll and inotify support
171			by libc header version if not using autoconf.
172	root	1.21	- new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
173			- declare functions defined in ev.h as inline if
174			C99 or gcc are available.
175			- enable inlining with gcc versions 2 and 3.
176	root	1.25	- work around broken poll implementations potentially
177			not clearing revents field in ev_poll (Brandon Black)
178			(no such systems are known at this time).
179	root	1.23	- work around a bug in realloc on openbsd and darwin,
180			also makes the errornous valgrind complaints
181			go away (noted by various people).
182	root	1.26	- fix ev_async_pending, add c++ wrapper for ev_async
183			(based on patch sent by Johannes Deisenhofer.
184			- add sensible set method to ev::embed.
185	root	1.27	- made integer constants type int in ev.h.
186	root	1.20
187	root	1.19	3.2 Wed Apr 2 17:11:19 CEST 2008
188	root	1.15	- fix a 64 bit overflow issue in the select backend,
189			by using fd_mask instead of int for the mask.
190	root	1.16	- rename internal sighandler to avoid clash with very old perls.
191	root	1.18	- entering ev_loop will not clear the ONESHOT or NONBLOCKING
192			flags of any outer loops anymore.
193	root	1.17	- add ev_async_pending.
194	root	1.15
195	root	1.14	3.1 Thu Mar 13 13:45:22 CET 2008
196	root	1.12	- implement ev_async watchers.
197	root	1.10	- only initialise signal pipe on demand.
198			- make use of sig_atomic_t configurable.
199	root	1.14	- improved documentation.
200	root	1.10
201	root	1.9	3.0 Mon Jan 28 13:14:47 CET 2008
202	root	1.6	- API/ABI bump to version 3.0.
203	root	1.4	- ev++.h includes "ev.h" by default now, not <ev.h>.
204			- slightly improved documentation.
205	root	1.5	- speed up signal detection after a fork.
206	root	1.6	- only optionally return trace status changed in ev_child
207			watchers.
208	root	1.8	- experimental (and undocumented) loop wrappers for ev++.h.
209	root	1.4
210	root	1.2	2.01 Tue Dec 25 08:04:41 CET 2007
211	root	1.3	- separate Changes file.
212	root	1.2	- fix ev_path_set => ev_stat_set typo.
213			- remove event_compat.h from the libev tarball.
214			- change how include files are found.
215			- doc updates.
216			- update licenses, explicitly allow for GPL relicensing.
217
218			2.0 Sat Dec 22 17:47:03 CET 2007
219			- new ev_sleep, ev_set_(io\|timeout)_collect_interval.
220			- removed epoll from embeddable fd set.
221			- fix embed watchers.
222			- renamed ev_embed.loop to other.
223			- added exported Symbol tables.
224			- undefine member wrapper macros at the end of ev.c.
225			- respect EV_H in ev++.h.
226
227			1.86 Tue Dec 18 02:36:57 CET 2007
228			- fix memleak on loop destroy (not relevant for perl).
229
230			1.85 Fri Dec 14 20:32:40 CET 2007
231			- fix some aliasing issues w.r.t. timers and periodics
232			(not relevant for perl).
233
234			(for historic versions refer to EV/Changes, found in the Perl interface)
235
236	root	1.1	0.1 Wed Oct 31 21:31:48 CET 2007
237			- original version; hacked together in <24h.
238