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Revision: 1.191
Committed: Thu Oct 21 23:43:17 2010 UTC (13 years, 6 months ago) by sf-exg
Branch: MAIN
Changes since 1.190: +6 -6 lines
Log Message:
Fix typos.

File Contents

# Content
1 Revision history for libev, a high-performance and full-featured event loop.
2
3 TODO: include ev_xyz_start in each example?
4 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
5 - ev_embed_stop did not correctly stop the watcher (very good
6 testcase by Vladimir Timofeev).
7 - ev_run will now always update the current loop time - it erroneously
8 didn't when idle watchers were active, causing timers not to fire.
9 - fix a bug where a timeout of zero caused the timer not to fire
10 in the libevent emulation (testcase by Péter Szabó).
11 - applied win32 fixes by Michael Lenaghan (also James Mansion).
12 - replace EV_MINIMAL by EV_FEATURES.
13 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
14 seems the former is *much* faster than the latter.
15 - reduce the number of spurious wake-ups with the ports backend.
16 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
17 - do async init within ev_async_start, not ev_async_set, which avoids
18 an API quirk where the set function must be called in the C++ API
19 even when there is nothing to set.
20 - add (undocumented) EV_ENABLE when adding events with kqueue,
21 this might help with OS X, which seems to need it despite documenting
22 not to need it (helpfully pointed out by Tilghman Lesher).
23 - do not use poll by default on freebsd, it's broken (what isn't
24 on freebsd...).
25 - configure now prepends -O3, not appends it, so one can still
26 override it.
27 - ev.pod: greatly expanded the portability section, added a porting
28 section, a description of watcher states and made lots of minor fixes.
29 - disable poll backend on AIX, the poll header spams the namespace
30 and it's not worth working around dead platforms (reported
31 and analyzed by Aivars Kalvans).
32 - improve header file compatibility of the standalone eventfd code
33 in an obscure case.
34 - implement EV_AVOID_STDIO option.
35 - do not use sscanf to parse linux version number (smaller, faster,
36 no sscanf dependency).
37 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
38 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
39 - add section on accept() problems to the manpage.
40 - rename EV_TIMEOUT to EV_TIMER.
41 - rename ev_loop_count/depth/verify/loop/unloop.
42 - switch to two-digit minor version.
43 - work around an apparent gentoo compiler bug.
44 - define _DARWIN_UNLIMITED_SELECT. just so.
45 - use enum instead of #define for most constants.
46 - improve compatibility to older C++ compilers.
47
48 3.9 Thu Dec 31 07:59:59 CET 2009
49 - signalfd is no longer used by default and has to be requested
50 explicitly - this means that easy to catch bugs become hard to
51 catch race conditions, but the users have spoken.
52 - point out the unspecified signal mask in the documentation, and
53 that this is a race condition regardless of EV_SIGNALFD.
54 - backport inotify code to C89.
55 - inotify file descriptors could leak into child processes.
56 - ev_stat watchers could keep an errornous extra ref on the loop,
57 preventing exit when unregistering all watchers (testcases
58 provided by ry@tinyclouds.org).
59 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
60 symbols to make it easier for apps to do their own fd management.
61 - support EV_IDLE_ENABLE being disabled in ev++.h
62 (patch by Didier Spezia).
63 - take advantage of inotify_init1, if available, to set cloexec/nonblock
64 on fd creation, to avoid races.
65 - the signal handling pipe wasn't always initialised under windows
66 (analysed by lekma).
67 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
68 signalfd.
69 - add missing string.h include (Denis F. Latypoff).
70 - only replace ev_stat.prev when we detect an actual difference,
71 so prev is (almost) always different to attr. this might
72 have caused the problems with 04_stat.t.
73 - add ev::timer->remaining () method to C++ API.
74
75 3.8 Sun Aug 9 14:30:45 CEST 2009
76 - incompatible change: do not necessarily reset signal handler
77 to SIG_DFL when a sighandler is stopped.
78 - ev_default_destroy did not properly free or zero some members,
79 potentially causing crashes and memory corruption on repeated
80 ev_default_destroy/ev_default_loop calls.
81 - take advantage of signalfd on GNU/Linux systems.
82 - document that the signal mask might be in an unspecified
83 state when using libev's signal handling.
84 - take advantage of some GNU/Linux calls to set cloexec/nonblock
85 on fd creation, to avoid race conditions.
86
87 3.7 Fri Jul 17 16:36:32 CEST 2009
88 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
89 instead of using a per-loop variable (bug caught by accident...).
90 - the ev_set_io_collect_interval interpretation has changed.
91 - add new functionality: ev_set_userdata, ev_userdata,
92 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
93 ev_invoke_pending, ev_pending_count, together with a long example
94 about thread locking.
95 - add ev_timer_remaining (as requested by Denis F. Latypoff).
96 - add ev_loop_depth.
97 - calling ev_unloop in fork/prepare watchers will no longer poll
98 for new events.
99 - Denis F. Latypoff corrected many typos in example code snippets.
100 - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
101 check that the syscall number is available before trying to
102 use it (reported by ry@tinyclouds).
103 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
104 slightly higher accuracy.
105 - properly declare ev_loop_verify and ev_now_update even when
106 !EV_MULTIPLICITY.
107 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
108 - support EV_MINIMAL==2 for a reduced API.
109 - actually 0-initialise struct sigaction when installing signals.
110 - add section on hibernate and stopped processes to ev_timer docs.
111
112 3.6 Tue Apr 28 02:49:30 CEST 2009
113 - multiple timers becoming ready within an event loop iteration
114 will be invoked in the "correct" order now.
115 - do not leave the event loop early just because we have no active
116 watchers, fixing a problem when embedding a kqueue loop
117 that has active kernel events but no registered watchers
118 (reported by blacksand blacksand).
119 - correctly zero the idx values for arrays, so destroying and
120 reinitialising the default loop actually works (patch by
121 Malek Hadj-Ali).
122 - implement ev_suspend and ev_resume.
123 - new EV_CUSTOM revents flag for use by applications.
124 - add documentation section about priorites.
125 - add a glossary to the dcoumentation.
126 - extend the ev_fork description slightly.
127 - optimize a jump out of call_pending.
128
129 3.53 Sun Feb 15 02:38:20 CET 2009
130 - fix a bug in event pipe creation on win32 that would cause a
131 failed assertion on event loop creation (patch by Malek Hadj-Ali).
132 - probe for CLOCK_REALTIME support at runtime as well and fall
133 back to gettimeofday if there is an error, to support older
134 operating systems with newer header files/libraries.
135 - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
136 (default most everywhere), otherwise not.
137
138 3.52 Wed Jan 7 21:43:02 CET 2009
139 - fix compilation of select backend in fd_set mode when NFDBITS is
140 missing (to get it to compile on QNX, reported by Rodrigo Campos).
141 - better select-nfds handling when select backend is in fd_set mode.
142 - diagnose fd_set overruns when select backend is in fd_set mode.
143 - due to a thinko, instead of disabling everything but
144 select on the borked OS X platform, everything but select was
145 allowed (reported by Emanuele Giaquinta).
146 - actually verify that local and remote port are matching in
147 libev's socketpair emulation, which makes denial-of-service
148 attacks harder (but not impossible - it's windows). Make sure
149 it even works under vista, which thinks that getpeer/sockname
150 should return fantasy port numbers.
151 - include "libev" in all assertion messages for potentially
152 clearer diagnostics.
153 - event_get_version (libevent compatibility) returned
154 a useless string instead of the expected version string
155 (patch by W.C.A. Wijngaards).
156
157 3.51 Wed Dec 24 23:00:11 CET 2008
158 - fix a bug where an inotify watcher was added twice, causing
159 freezes on hash collisions (reported and analysed by Graham Leggett).
160 - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
161 a direct syscall - slower, but no dependency on librt et al.
162 - assume negative return values != -1 signals success of port_getn
163 (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
164 (no known failure reports, but it doesn't hurt).
165 - fork detection in ev_embed now stops and restarts the watcher
166 automatically.
167 - EXPERIMENTAL: default the method to operator () in ev++.h,
168 to make it nicer to use functors (requested by Benedek László).
169 - fixed const object callbacks in ev++.h.
170 - replaced loop_ref argument of watcher.set (loop) by a direct
171 ev_loop * in ev++.h, to avoid clashes with functor patch.
172 - do not try to watch the empty string via inotify.
173 - inotify watchers could be leaked under certain circumstances.
174 - OS X 10.5 is actually even more broken than earlier versions,
175 so fall back to select on that piece of garbage.
176 - fixed some weirdness in the ev_embed documentation.
177
178 3.49 Wed Nov 19 11:26:53 CET 2008
179 - ev_stat watchers will now use inotify as a mere hint on
180 kernels <2.6.25, or if the filesystem is not in the
181 "known to be good" list.
182 - better mingw32 compatibility (it's not as borked as native win32)
183 (analysed by Roger Pack).
184 - include stdio.h in the example program, as too many people are
185 confused by the weird C language otherwise. I guess the next thing
186 I get told is that the "..." ellipses in the examples don't compile
187 with their C compiler.
188
189 3.48 Thu Oct 30 09:02:37 CET 2008
190 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
191 backend by assuming the kernel event mask hasn't changed if
192 ADD fails with EEXIST.
193 - work around spurious event notification bugs in epoll by using
194 a 32-bit generation counter. recreate kernel state if we receive
195 spurious notifications or unwanted events. this is very costly,
196 but I didn't come up with this horrible design.
197 - use memset to initialise most arrays now and do away with the
198 init functions.
199 - expand time-out strategies into a "Be smart about timeouts" section.
200 - drop the "struct" from all ev_watcher declarations in the
201 documentation and did other clarifications (yeah, it was a mistake
202 to have a struct AND a function called ev_loop).
203 - fix a bug where ev_default would not initialise the default
204 loop again after it was destroyed with ev_default_destroy.
205 - rename syserr to ev_syserr to avoid name clashes when embedding,
206 do similar changes for event.c.
207
208 3.45 Tue Oct 21 21:59:26 CEST 2008
209 - disable inotify usage on linux <2.6.25, as it is broken
210 (reported by Yoann Vandoorselaere).
211 - ev_stat erroneously would try to add inotify watchers
212 even when inotify wasn't available (this should only
213 have a performance impact).
214 - ev_once now passes both timeout and io to the callback if both
215 occur concurrently, instead of giving timeouts precedence.
216 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
217
218 3.44 Mon Sep 29 05:18:39 CEST 2008
219 - embed watchers now automatically invoke ev_loop_fork on the
220 embedded loop when the parent loop forks.
221 - new function: ev_now_update (loop).
222 - verify_watcher was not marked static.
223 - improve the "associating..." manpage section.
224 - documentation tweaks here and there.
225
226 3.43 Sun Jul 6 05:34:41 CEST 2008
227 - include more include files on windows to get struct _stati64
228 (reported by Chris Hulbert, but doesn't quite fix his issue).
229 - add missing #include <io.h> in ev.c on windows (reported by
230 Matt Tolton).
231
232 3.42 Tue Jun 17 12:12:07 CEST 2008
233 - work around yet another windows bug: FD_SET actually adds fd's
234 multiple times to the fd_*SET*, despite official MSN docs claiming
235 otherwise. Reported and well-analysed by Matt Tolton.
236 - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
237 (reported any analysed by Chris Hulbert).
238 - fix a bug in ev_ebadf (this function is only used to catch
239 programming errors in the libev user). reported by Matt Tolton.
240 - fix a bug in fd_intern on win32 (could lead to compile errors
241 under some circumstances, but would work correctly if it compiles).
242 reported by Matt Tolton.
243 - (try to) work around missing lstat on windows.
244 - pass in the write fd set as except fd set under windows. windows
245 is so uncontrollably lame that it requires this. this means that
246 switching off oobinline is not supported (but tcp/ip doesn't
247 have oob, so that would be stupid anyways.
248 - use posix module symbol to auto-detect monotonic clock presence
249 and some other default values.
250
251 3.41 Fri May 23 18:42:54 CEST 2008
252 - work around an obscure bug in winsocket select: if you
253 provide only empty fd sets then select returns WSAEINVAL. how sucky.
254 - improve timer scheduling stability and reduce use of time_epsilon.
255 - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
256 codesize and makes for better cache-efficiency.
257 - use 3-based 4-heap for !EV_MINIMAL. this makes better use
258 of cpu cache lines and gives better growth behaviour than
259 2-based heaps.
260 - cache timestamp within heap for !EV_MINIMAL, to avoid random
261 memory accesses.
262 - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
263 - fix a potential aliasing issue in ev_timer_again.
264 - add/document ev_periodic_at, retract direct access to ->at.
265 - improve ev_stat docs.
266 - add portability requirements section.
267 - fix manpage headers etc.
268 - normalise WSA error codes to lower range on windows.
269 - add consistency check code that can be called automatically
270 or on demand to check for internal structures (ev_loop_verify).
271
272 3.31 Wed Apr 16 20:45:04 CEST 2008
273 - added last minute fix for ev_poll.c by Brandon Black.
274
275 3.3 Wed Apr 16 19:04:10 CEST 2008
276 - event_base_loopexit should return 0 on success
277 (W.C.A. Wijngaards).
278 - added linux eventfd support.
279 - try to autodetect epoll and inotify support
280 by libc header version if not using autoconf.
281 - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
282 - declare functions defined in ev.h as inline if
283 C99 or gcc are available.
284 - enable inlining with gcc versions 2 and 3.
285 - work around broken poll implementations potentially
286 not clearing revents field in ev_poll (Brandon Black)
287 (no such systems are known at this time).
288 - work around a bug in realloc on openbsd and darwin,
289 also makes the erroneous valgrind complaints
290 go away (noted by various people).
291 - fix ev_async_pending, add c++ wrapper for ev_async
292 (based on patch sent by Johannes Deisenhofer).
293 - add sensible set method to ev::embed.
294 - made integer constants type int in ev.h.
295
296 3.2 Wed Apr 2 17:11:19 CEST 2008
297 - fix a 64 bit overflow issue in the select backend,
298 by using fd_mask instead of int for the mask.
299 - rename internal sighandler to avoid clash with very old perls.
300 - entering ev_loop will not clear the ONESHOT or NONBLOCKING
301 flags of any outer loops anymore.
302 - add ev_async_pending.
303
304 3.1 Thu Mar 13 13:45:22 CET 2008
305 - implement ev_async watchers.
306 - only initialise signal pipe on demand.
307 - make use of sig_atomic_t configurable.
308 - improved documentation.
309
310 3.0 Mon Jan 28 13:14:47 CET 2008
311 - API/ABI bump to version 3.0.
312 - ev++.h includes "ev.h" by default now, not <ev.h>.
313 - slightly improved documentation.
314 - speed up signal detection after a fork.
315 - only optionally return trace status changed in ev_child
316 watchers.
317 - experimental (and undocumented) loop wrappers for ev++.h.
318
319 2.01 Tue Dec 25 08:04:41 CET 2007
320 - separate Changes file.
321 - fix ev_path_set => ev_stat_set typo.
322 - remove event_compat.h from the libev tarball.
323 - change how include files are found.
324 - doc updates.
325 - update licenses, explicitly allow for GPL relicensing.
326
327 2.0 Sat Dec 22 17:47:03 CET 2007
328 - new ev_sleep, ev_set_(io|timeout)_collect_interval.
329 - removed epoll from embeddable fd set.
330 - fix embed watchers.
331 - renamed ev_embed.loop to other.
332 - added exported Symbol tables.
333 - undefine member wrapper macros at the end of ev.c.
334 - respect EV_H in ev++.h.
335
336 1.86 Tue Dec 18 02:36:57 CET 2007
337 - fix memleak on loop destroy (not relevant for perl).
338
339 1.85 Fri Dec 14 20:32:40 CET 2007
340 - fix some aliasing issues w.r.t. timers and periodics
341 (not relevant for perl).
342
343 (for historic versions refer to EV/Changes, found in the Perl interface)
344
345 0.1 Wed Oct 31 21:31:48 CET 2007
346 - original version; hacked together in <24h.
347