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Comparing libev/Changes (file contents):
Revision 1.138 by root, Sun Jul 19 07:20:41 2009 UTC vs.
Revision 1.330 by root, Wed Jun 26 00:01:46 2019 UTC

1Revision history for libev, a high-performance and full-featured event loop. 1Revision history for libev, a high-performance and full-featured event loop.
2 2
3TODO: ev_walk 3 - linux aio backend almost complete rewritten to work around its
4TODO: signal handling per loop 4 limitations.
5TODO: NSIG etc. 5 - epoll backend now mandatory for linux aio backend.
6TODO: NOSIGFD/NOEVTFD/NOINOTIFY? 6 - fail assertions more aggressively on invalid fd's detected
7TODO: gotsig per-loop 7 in the event loop, do not just silently fd_kill in case of
8 user error.
9 - ev_io_start/ev_io_stop now verify the watcher fd using
10 a syscall when EV_VERIFY is 2 or higher.
11
124.26 (EV only)
13 - update to libecb 0x00010006.
14 - new experimental linux aio backend (linux 4.18+).
15 - removed redundant 0-ptr check in ev_once.
16 - updated/extended ev_set_allocator documentation.
17 - replaced EMPTY2 macro by array_needsize_noinit.
18 - minor code cleanups.
19 - epoll backend now uses epoll_create1 also after fork.
20
214.25 Fri Dec 21 07:49:20 CET 2018
22 - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
23 (EV_THROW still provided) and now uses noexcept on C++11 or newer.
24 - move the darwin select workaround highe rin ev.c, as newer versions of
25 darwin managed to break their broken select even more.
26 - ANDROID => __ANDROID__ (reported by enh@google.com).
27 - disable epoll_create1 on android because it has broken header files
28 and google is unwilling to fix them (reported by enh@google.com).
29 - avoid a minor compilation warning on win32.
30 - c++: remove deprecated dynamic throw() specifications.
31 - c++: improve the (unsupported) bad_loop exception class.
32 - backport perl ev_periodic example to C, untested.
33 - update libecb, biggets change is to include a memory fence
34 in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
35 - minor autoconf/automake modernisation.
36
374.24 Wed Dec 28 05:19:55 CET 2016
38 - bump version to 4.24, as the release tarball inexplicably
39 didn't have the right version in ev.h, even though the cvs-tagged
40 version did have the right one (reported by Ales Teska).
41
424.23 Wed Nov 16 18:23:41 CET 2016
43 - move some declarations at the beginning to help certain retarded
44 microsoft compilers, even though their documentation claims
45 otherwise (reported by Ruslan Osmanov).
46
474.22 Sun Dec 20 22:11:50 CET 2015
48 - when epoll detects unremovable fds in the fd set, rebuild
49 only the epoll descriptor, not the signal pipe, to avoid
50 SIGPIPE in ev_async_send. This doesn't solve it on fork,
51 so document what needs to be done in ev_loop_fork
52 (analyzed by Benjamin Mahler).
53 - remove superfluous sys/timeb.h include on win32
54 (analyzed by Jason Madden).
55 - updated libecb.
56
574.20 Sat Jun 20 13:01:43 CEST 2015
58 - prefer noexcept over throw () with C++ 11.
59 - update ecb.h due to incompatibilities with c11.
60 - fix a potential aliasing issue when reading and writing
61 watcher callbacks.
62
634.19 Thu Sep 25 08:18:25 CEST 2014
64 - ev.h wasn't valid C++ anymore, which tripped compilers other than
65 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
66 C++ doesn't support typedefs for function pointers fully, so the affected
67 declarations have to spell out the types each time.
68 - when not using autoconf, tighten the check for clock_gettime and related
69 functionality.
70
714.18 Fri Sep 5 17:55:26 CEST 2014
72 - events on files were not always generated properly with the
73 epoll backend (testcase by Assaf Inbal).
74 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
75 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
76 - use a reasonable fallback for EV_NSIG instead of erroring out
77 when we can't detect the signal set size.
78 - in the absence of autoconf, do not use the clock syscall
79 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
80 doing clock_gettime in userspace).
81 - ensure extern "C" function pointers are used for externally-visible
82 loop callbacks (not watcher callbacks yet).
83 - (ecb) work around memory barriers and volatile apparently both being
84 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
85
864.15 Fri Mar 1 12:04:50 CET 2013
87 - destroying a non-default loop would stop the global waitpid
88 watcher (Denis Bilenko).
89 - queueing pending watchers of higher priority from a watcher now invokes
90 them in a timely fashion (reported by Denis Bilenko).
91 - add throw() to all libev functions that cannot throw exceptions, for
92 further code size decrease when compiling for C++.
93 - add throw () to callbacks that must not throw exceptions (allocator,
94 syserr, loop acquire/release, periodic reschedule cbs).
95 - fix event_base_loop return code, add event_get_callback, event_base_new,
96 event_base_get_method calls to improve libevent 1.x emulation and add
97 some libevent 2.x functionality (based on a patch by Jeff Davey).
98 - add more memory fences to fix a bug reported by Jeff Davey. Better
99 be overfenced than underprotected.
100 - ev_run now returns a boolean status (true meaning watchers are
101 still active).
102 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
103 libev's EV_ERROR (reported by 191919).
104 - (ecb) add memory fence support for xlC (Darin McBride).
105 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
106 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
107 - work around some kernels losing file descriptors by leaking
108 the kqueue descriptor in the child.
109 - work around linux inotify not reporting IN_ATTRIB changes for directories
110 in many cases.
111 - include sys/syscall.h instead of plain syscall.h.
112 - check for io watcher loops in ev_verify, check for the most
113 common reported usage bug in ev_io_start.
114 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
115 - always use WSASend/WSARecv directly on windows, hoping that this
116 works in all cases (unlike read/write/send/recv...).
117 - try to detect signals around a fork faster (test program by
118 Denis Bilenko).
119 - work around recent glibc versions that leak memory in realloc.
120 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
121 the watcher base set (loop) method.
122 - rewrite the async/signal pipe logic to always keep a valid fd, which
123 simplifies (and hopefully correctifies :) the race checking
124 on fork, at the cost of one extra fd.
125 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
126 inotify-supporting filesystems.
127 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
128 versions ignore it before
129 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
130 - add some untested android support.
131 - enum expressions must be of type int (reported by Juan Pablo L).
132
1334.11 Sat Feb 4 19:52:39 CET 2012
134 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
135 was documented already, but not implemented in the repeating case.
136 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
137 - fix a race where the workaround against the epoll fork bugs
138 caused signals to not be handled anymore.
139 - correct backend_fudge for most backends, and implement a windows
140 specific workaround to avoid looping because we call both
141 select and Sleep, both with different time resolutions.
142 - document range and guarantees of ev_sleep.
143 - document reasonable ranges for periodics interval and offset.
144 - rename backend_fudge to backend_mintime to avoid future confusion :)
145 - change the default periodic reschedule function to hopefully be more
146 exact and correct even in corner cases or in the far future.
147 - do not rely on -lm anymore: use it when available but use our
148 own floor () if it is missing. This should make it easier to embed,
149 as no external libraries are required.
150 - strategically import macros from libecb and mark rarely-used functions
151 as cache-cold (saving almost 2k code size on typical amd64 setups).
152 - add Symbols.ev and Symbols.event files, that were missing.
153 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
154 - fix #3 "be smart about timeouts" to not "deadlock" when
155 timeout == now, also improve the section overall.
156 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
157 - support new EV_API_STATIC mode to make all libev symbols
158 static.
159 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
160 were empty.
161
1624.04 Wed Feb 16 09:01:51 CET 2011
163 - fix two problems in the native win32 backend, where reuse of fd's
164 with different underlying handles caused handles not to be removed
165 or added to the select set (analyzed and tested by Bert Belder).
166 - do no rely on ceil() in ev_e?poll.c.
167 - backport libev to HP-UX versions before 11 v3.
168 - configure did not detect nanosleep and clock_gettime properly when
169 they are available in the libc (as opposed to -lrt).
170
1714.03 Tue Jan 11 14:37:25 CET 2011
172 - officially support polling files with all backends.
173 - support files, /dev/zero etc. the same way as select in the epoll
174 backend, by generating events on our own.
175 - ports backend: work around solaris bug 6874410 and many related ones
176 (EINTR, maybe more), with no performance loss (note that the solaris
177 bug report is actually wrong, reality is far more bizarre and broken
178 than that).
179 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
180 #ifdef to test for them.
181 - new (experimental) function: ev_feed_signal.
182 - new (to become default) EVFLAG_NOSIGMASK flag.
183 - new EVBACKEND_MASK symbol.
184 - updated COMMON IDIOMS SECTION.
185
1864.01 Fri Nov 5 21:51:29 CET 2010
187 - automake fucked it up, apparently, --add-missing -f is not quite enough
188 to make it update its files, so 4.00 didn't install ev++.h and
189 event.h on make install. grrr.
190 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
191 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
192 - use "(libev) " prefix for all libev error messages now.
193
1944.00 Mon Oct 25 12:32:12 CEST 2010
195 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
196 - ev_embed_stop did not correctly stop the watcher (very good
197 testcase by Vladimir Timofeev).
198 - ev_run will now always update the current loop time - it erroneously
199 didn't when idle watchers were active, causing timers not to fire.
200 - fix a bug where a timeout of zero caused the timer not to fire
201 in the libevent emulation (testcase by Péter Szabó).
202 - applied win32 fixes by Michael Lenaghan (also James Mansion).
203 - replace EV_MINIMAL by EV_FEATURES.
204 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
205 seems the former is *much* faster than the latter.
206 - linux kernel version detection (for inotify bug workarounds)
207 did not work properly.
208 - reduce the number of spurious wake-ups with the ports backend.
209 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
210 - do async init within ev_async_start, not ev_async_set, which avoids
211 an API quirk where the set function must be called in the C++ API
212 even when there is nothing to set.
213 - add (undocumented) EV_ENABLE when adding events with kqueue,
214 this might help with OS X, which seems to need it despite documenting
215 not to need it (helpfully pointed out by Tilghman Lesher).
216 - do not use poll by default on freebsd, it's broken (what isn't
217 on freebsd...).
218 - allow to embed epoll on kernels >= 2.6.32.
219 - configure now prepends -O3, not appends it, so one can still
220 override it.
221 - ev.pod: greatly expanded the portability section, added a porting
222 section, a description of watcher states and made lots of minor fixes.
223 - disable poll backend on AIX, the poll header spams the namespace
224 and it's not worth working around dead platforms (reported
225 and analyzed by Aivars Kalvans).
226 - improve header file compatibility of the standalone eventfd code
227 in an obscure case.
228 - implement EV_AVOID_STDIO option.
229 - do not use sscanf to parse linux version number (smaller, faster,
230 no sscanf dependency).
231 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
232 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
233 - add section on accept() problems to the manpage.
234 - rename EV_TIMEOUT to EV_TIMER.
235 - rename ev_loop_count/depth/verify/loop/unloop.
236 - remove ev_default_destroy and ev_default_fork.
237 - switch to two-digit minor version.
238 - work around an apparent gentoo compiler bug.
239 - define _DARWIN_UNLIMITED_SELECT. just so.
240 - use enum instead of #define for most constants.
241 - improve compatibility to older C++ compilers.
242 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
243 default arguments when compiled as C++.
244 - enable automake dependency tracking.
245 - ev_loop_new no longer leaks memory when loop creation failed.
246 - new ev_cleanup watcher type.
247
2483.9 Thu Dec 31 07:59:59 CET 2009
249 - signalfd is no longer used by default and has to be requested
250 explicitly - this means that easy to catch bugs become hard to
251 catch race conditions, but the users have spoken.
252 - point out the unspecified signal mask in the documentation, and
253 that this is a race condition regardless of EV_SIGNALFD.
254 - backport inotify code to C89.
255 - inotify file descriptors could leak into child processes.
256 - ev_stat watchers could keep an erroneous extra ref on the loop,
257 preventing exit when unregistering all watchers (testcases
258 provided by ry@tinyclouds.org).
259 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
260 symbols to make it easier for apps to do their own fd management.
261 - support EV_IDLE_ENABLE being disabled in ev++.h
262 (patch by Didier Spezia).
263 - take advantage of inotify_init1, if available, to set cloexec/nonblock
264 on fd creation, to avoid races.
265 - the signal handling pipe wasn't always initialised under windows
266 (analysed by lekma).
267 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
268 signalfd.
269 - add missing string.h include (Denis F. Latypoff).
270 - only replace ev_stat.prev when we detect an actual difference,
271 so prev is (almost) always different to attr. this might
272 have caused the problems with 04_stat.t.
273 - add ev::timer->remaining () method to C++ API.
274
2753.8 Sun Aug 9 14:30:45 CEST 2009
8 - incompatible change: do not necessarily reset signal handler 276 - incompatible change: do not necessarily reset signal handler
9 to SIG_DFL when a sighandler is stopped. 277 to SIG_DFL when a sighandler is stopped.
10 - ev_default_destroy did not properly free or zero some members, 278 - ev_default_destroy did not properly free or zero some members,
11 potentially causing crashes and memory corruption on repated 279 potentially causing crashes and memory corruption on repeated
12 ev_default_destroy/ev_default_loop calls. 280 ev_default_destroy/ev_default_loop calls.
13 - take advantage of signalfd on GNU/Linux systems. 281 - take advantage of signalfd on GNU/Linux systems.
14 - document that the signal mask might be in an unspecified 282 - document that the signal mask might be in an unspecified
15 state when using libev's signal handling. 283 state when using libev's signal handling.
16 - take advantage of some GNU/Linux calls to set cloexec/nonblock 284 - take advantage of some GNU/Linux calls to set cloexec/nonblock
… …
51 - correctly zero the idx values for arrays, so destroying and 319 - correctly zero the idx values for arrays, so destroying and
52 reinitialising the default loop actually works (patch by 320 reinitialising the default loop actually works (patch by
53 Malek Hadj-Ali). 321 Malek Hadj-Ali).
54 - implement ev_suspend and ev_resume. 322 - implement ev_suspend and ev_resume.
55 - new EV_CUSTOM revents flag for use by applications. 323 - new EV_CUSTOM revents flag for use by applications.
56 - add documentation section about priorites. 324 - add documentation section about priorities.
57 - add a glossary to the dcoumentation. 325 - add a glossary to the documentation.
58 - extend the ev_fork description slightly. 326 - extend the ev_fork description slightly.
59 - optimize a jump out of call_pending. 327 - optimize a jump out of call_pending.
60 328
613.53 Sun Feb 15 02:38:20 CET 2009 3293.53 Sun Feb 15 02:38:20 CET 2009
62 - fix a bug in event pipe creation on win32 that would cause a 330 - fix a bug in event pipe creation on win32 that would cause a
… …
138 do similar changes for event.c. 406 do similar changes for event.c.
139 407
1403.45 Tue Oct 21 21:59:26 CEST 2008 4083.45 Tue Oct 21 21:59:26 CEST 2008
141 - disable inotify usage on linux <2.6.25, as it is broken 409 - disable inotify usage on linux <2.6.25, as it is broken
142 (reported by Yoann Vandoorselaere). 410 (reported by Yoann Vandoorselaere).
143 - ev_stat errornously would try to add inotify watchers 411 - ev_stat erroneously would try to add inotify watchers
144 even when inotify wasn't available (this should only 412 even when inotify wasn't available (this should only
145 have a performance impact). 413 have a performance impact).
146 - ev_once now passes both timeout and io to the callback if both 414 - ev_once now passes both timeout and io to the callback if both
147 occur concurrently, instead of giving timeouts precedence. 415 occur concurrently, instead of giving timeouts precedence.
148 - disable EV_USE_INOTIFY when sys/inotify.h is too old. 416 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
… …
216 - enable inlining with gcc versions 2 and 3. 484 - enable inlining with gcc versions 2 and 3.
217 - work around broken poll implementations potentially 485 - work around broken poll implementations potentially
218 not clearing revents field in ev_poll (Brandon Black) 486 not clearing revents field in ev_poll (Brandon Black)
219 (no such systems are known at this time). 487 (no such systems are known at this time).
220 - work around a bug in realloc on openbsd and darwin, 488 - work around a bug in realloc on openbsd and darwin,
221 also makes the errornous valgrind complaints 489 also makes the erroneous valgrind complaints
222 go away (noted by various people). 490 go away (noted by various people).
223 - fix ev_async_pending, add c++ wrapper for ev_async 491 - fix ev_async_pending, add c++ wrapper for ev_async
224 (based on patch sent by Johannes Deisenhofer. 492 (based on patch sent by Johannes Deisenhofer).
225 - add sensible set method to ev::embed. 493 - add sensible set method to ev::embed.
226 - made integer constants type int in ev.h. 494 - made integer constants type int in ev.h.
227 495
2283.2 Wed Apr 2 17:11:19 CEST 2008 4963.2 Wed Apr 2 17:11:19 CEST 2008
229 - fix a 64 bit overflow issue in the select backend, 497 - fix a 64 bit overflow issue in the select backend,

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