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Comparing libev/Changes (file contents):
Revision 1.180 by root, Thu Jun 24 19:22:26 2010 UTC vs.
Revision 1.345 by root, Fri Nov 22 14:32:13 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: ABI??? API????? Changes??? 3TODO: revisit 59.x timer in the light of modern powersaving
4TODO: win32 write() to socket for signal handling 4TODO: maybe use timerfd to detect time jumps on linux
5TODO: poll asert 5TODO: document EV_TSTAMP_T
6TODO: EV_USE__XXX default with config, document 6
7TODO: pendingall => idleall? 74.29
8TODO: portbality section, solaris errno rrentrant, aix, win32, linux 32 bit 8 - (libev) add io uring autoconf and non-autoconf detection,
9TODO: include ev_xyz_start in each example? 9 the latter of which should disable io_uring compilation
10TODO: section watcher states/lifetime 10 on old systems.
11
124.28 (EV only)
13 - linuxaio backend resulted in random memory corruption
14 when loop is forked.
15 - linuxaio backend might have tried to cancel an iocb
16 multiple times (was unable to trigger this).
17 - linuxaio backend now employs a generation counter to
18 avoid handling spurious events from cancelled requests.
19 - io_cancel can return EINTR, deal with it. also, assume
20 io_submit also returns EINTR.
21 - fix some other minor bugs in linuxaio backend.
22 - ev_tstamp type can now be overriden by defining EV_TSTAMP_T.
23 - cleanup: replace expect_true/false and noinline by their
24 libecb counterparts.
25 - move syscall infrastructure from ev_linuxaio.c to ev.c.
26 - prepare io_uring integration.
27 - tweak ev_floor.
28 - epoll, poll, win32 Sleep and other places that use millisecond
29 reslution now all try to round up times.
30 - solaris port backend didn't compile.
31 - abstract time constants into their macros, for more flexibility.
32
334.27 Thu Jun 27 22:43:44 CEST 2019
34 - linux aio backend almost completely rewritten to work around its
35 limitations.
36 - linux aio backend now requires linux 4.19+.
37 - epoll backend now mandatory for linux aio backend.
38 - fail assertions more aggressively on invalid fd's detected
39 in the event loop, do not just silently fd_kill in case of
40 user error.
41 - ev_io_start/ev_io_stop now verify the watcher fd using
42 a syscall when EV_VERIFY is 2 or higher.
43
444.26 (EV only)
45 - update to libecb 0x00010006.
46 - new experimental linux aio backend (linux 4.18+).
47 - removed redundant 0-ptr check in ev_once.
48 - updated/extended ev_set_allocator documentation.
49 - replaced EMPTY2 macro by array_needsize_noinit.
50 - minor code cleanups.
51 - epoll backend now uses epoll_create1 also after fork.
52
534.25 Fri Dec 21 07:49:20 CET 2018
54 - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
55 (EV_THROW still provided) and now uses noexcept on C++11 or newer.
56 - move the darwin select workaround higher in ev.c, as newer versions of
57 darwin managed to break their broken select even more.
58 - ANDROID => __ANDROID__ (reported by enh@google.com).
59 - disable epoll_create1 on android because it has broken header files
60 and google is unwilling to fix them (reported by enh@google.com).
61 - avoid a minor compilation warning on win32.
62 - c++: remove deprecated dynamic throw() specifications.
63 - c++: improve the (unsupported) bad_loop exception class.
64 - backport perl ev_periodic example to C, untested.
65 - update libecb, biggets change is to include a memory fence
66 in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
67 - minor autoconf/automake modernisation.
68
694.24 Wed Dec 28 05:19:55 CET 2016
70 - bump version to 4.24, as the release tarball inexplicably
71 didn't have the right version in ev.h, even though the cvs-tagged
72 version did have the right one (reported by Ales Teska).
73
744.23 Wed Nov 16 18:23:41 CET 2016
75 - move some declarations at the beginning to help certain retarded
76 microsoft compilers, even though their documentation claims
77 otherwise (reported by Ruslan Osmanov).
78
794.22 Sun Dec 20 22:11:50 CET 2015
80 - when epoll detects unremovable fds in the fd set, rebuild
81 only the epoll descriptor, not the signal pipe, to avoid
82 SIGPIPE in ev_async_send. This doesn't solve it on fork,
83 so document what needs to be done in ev_loop_fork
84 (analyzed by Benjamin Mahler).
85 - remove superfluous sys/timeb.h include on win32
86 (analyzed by Jason Madden).
87 - updated libecb.
88
894.20 Sat Jun 20 13:01:43 CEST 2015
90 - prefer noexcept over throw () with C++ 11.
91 - update ecb.h due to incompatibilities with c11.
92 - fix a potential aliasing issue when reading and writing
93 watcher callbacks.
94
954.19 Thu Sep 25 08:18:25 CEST 2014
96 - ev.h wasn't valid C++ anymore, which tripped compilers other than
97 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
98 C++ doesn't support typedefs for function pointers fully, so the affected
99 declarations have to spell out the types each time.
100 - when not using autoconf, tighten the check for clock_gettime and related
101 functionality.
102
1034.18 Fri Sep 5 17:55:26 CEST 2014
104 - events on files were not always generated properly with the
105 epoll backend (testcase by Assaf Inbal).
106 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
107 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
108 - use a reasonable fallback for EV_NSIG instead of erroring out
109 when we can't detect the signal set size.
110 - in the absence of autoconf, do not use the clock syscall
111 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
112 doing clock_gettime in userspace).
113 - ensure extern "C" function pointers are used for externally-visible
114 loop callbacks (not watcher callbacks yet).
115 - (ecb) work around memory barriers and volatile apparently both being
116 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
117
1184.15 Fri Mar 1 12:04:50 CET 2013
119 - destroying a non-default loop would stop the global waitpid
120 watcher (Denis Bilenko).
121 - queueing pending watchers of higher priority from a watcher now invokes
122 them in a timely fashion (reported by Denis Bilenko).
123 - add throw() to all libev functions that cannot throw exceptions, for
124 further code size decrease when compiling for C++.
125 - add throw () to callbacks that must not throw exceptions (allocator,
126 syserr, loop acquire/release, periodic reschedule cbs).
127 - fix event_base_loop return code, add event_get_callback, event_base_new,
128 event_base_get_method calls to improve libevent 1.x emulation and add
129 some libevent 2.x functionality (based on a patch by Jeff Davey).
130 - add more memory fences to fix a bug reported by Jeff Davey. Better
131 be overfenced than underprotected.
132 - ev_run now returns a boolean status (true meaning watchers are
133 still active).
134 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
135 libev's EV_ERROR (reported by 191919).
136 - (ecb) add memory fence support for xlC (Darin McBride).
137 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
138 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
139 - work around some kernels losing file descriptors by leaking
140 the kqueue descriptor in the child.
141 - work around linux inotify not reporting IN_ATTRIB changes for directories
142 in many cases.
143 - include sys/syscall.h instead of plain syscall.h.
144 - check for io watcher loops in ev_verify, check for the most
145 common reported usage bug in ev_io_start.
146 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
147 - always use WSASend/WSARecv directly on windows, hoping that this
148 works in all cases (unlike read/write/send/recv...).
149 - try to detect signals around a fork faster (test program by
150 Denis Bilenko).
151 - work around recent glibc versions that leak memory in realloc.
152 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
153 the watcher base set (loop) method.
154 - rewrite the async/signal pipe logic to always keep a valid fd, which
155 simplifies (and hopefully correctifies :) the race checking
156 on fork, at the cost of one extra fd.
157 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
158 inotify-supporting filesystems.
159 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
160 versions ignore it before
161 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
162 - add some untested android support.
163 - enum expressions must be of type int (reported by Juan Pablo L).
164
1654.11 Sat Feb 4 19:52:39 CET 2012
166 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
167 was documented already, but not implemented in the repeating case.
168 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
169 - fix a race where the workaround against the epoll fork bugs
170 caused signals to not be handled anymore.
171 - correct backend_fudge for most backends, and implement a windows
172 specific workaround to avoid looping because we call both
173 select and Sleep, both with different time resolutions.
174 - document range and guarantees of ev_sleep.
175 - document reasonable ranges for periodics interval and offset.
176 - rename backend_fudge to backend_mintime to avoid future confusion :)
177 - change the default periodic reschedule function to hopefully be more
178 exact and correct even in corner cases or in the far future.
179 - do not rely on -lm anymore: use it when available but use our
180 own floor () if it is missing. This should make it easier to embed,
181 as no external libraries are required.
182 - strategically import macros from libecb and mark rarely-used functions
183 as cache-cold (saving almost 2k code size on typical amd64 setups).
184 - add Symbols.ev and Symbols.event files, that were missing.
185 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
186 - fix #3 "be smart about timeouts" to not "deadlock" when
187 timeout == now, also improve the section overall.
188 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
189 - support new EV_API_STATIC mode to make all libev symbols
190 static.
191 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
192 were empty.
193
1944.04 Wed Feb 16 09:01:51 CET 2011
195 - fix two problems in the native win32 backend, where reuse of fd's
196 with different underlying handles caused handles not to be removed
197 or added to the select set (analyzed and tested by Bert Belder).
198 - do no rely on ceil() in ev_e?poll.c.
199 - backport libev to HP-UX versions before 11 v3.
200 - configure did not detect nanosleep and clock_gettime properly when
201 they are available in the libc (as opposed to -lrt).
202
2034.03 Tue Jan 11 14:37:25 CET 2011
204 - officially support polling files with all backends.
205 - support files, /dev/zero etc. the same way as select in the epoll
206 backend, by generating events on our own.
207 - ports backend: work around solaris bug 6874410 and many related ones
208 (EINTR, maybe more), with no performance loss (note that the solaris
209 bug report is actually wrong, reality is far more bizarre and broken
210 than that).
211 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
212 #ifdef to test for them.
213 - new (experimental) function: ev_feed_signal.
214 - new (to become default) EVFLAG_NOSIGMASK flag.
215 - new EVBACKEND_MASK symbol.
216 - updated COMMON IDIOMS SECTION.
217
2184.01 Fri Nov 5 21:51:29 CET 2010
219 - automake fucked it up, apparently, --add-missing -f is not quite enough
220 to make it update its files, so 4.00 didn't install ev++.h and
221 event.h on make install. grrr.
222 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
223 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
224 - use "(libev) " prefix for all libev error messages now.
225
2264.00 Mon Oct 25 12:32:12 CEST 2010
11 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. 227 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
12 - ev_embed_stop did not correctly stop the watcher (very good 228 - ev_embed_stop did not correctly stop the watcher (very good
13 testcase by Vladimir Timofeev). 229 testcase by Vladimir Timofeev).
230 - ev_run will now always update the current loop time - it erroneously
231 didn't when idle watchers were active, causing timers not to fire.
14 - fix a bug where a timeout of zero caused the timer not to fire 232 - fix a bug where a timeout of zero caused the timer not to fire
15 in the libevent emulation (testcase by Péter Szabó). 233 in the libevent emulation (testcase by Péter Szabó).
16 - applied win32 fixes by Michael Lenaghan (also James Mansion). 234 - applied win32 fixes by Michael Lenaghan (also James Mansion).
17 - replace EV_MINIMAL by EV_FEATURES. 235 - replace EV_MINIMAL by EV_FEATURES.
18 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it 236 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
19 seems the former is *much* faster than the latter. 237 seems the former is *much* faster than the latter.
238 - linux kernel version detection (for inotify bug workarounds)
239 did not work properly.
240 - reduce the number of spurious wake-ups with the ports backend.
20 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu). 241 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
242 - do async init within ev_async_start, not ev_async_set, which avoids
243 an API quirk where the set function must be called in the C++ API
244 even when there is nothing to set.
21 - add (undocumented) EV_ENABLE when adding events with kqueue, 245 - add (undocumented) EV_ENABLE when adding events with kqueue,
22 this might help with OS X, which seems to need it despite documenting 246 this might help with OS X, which seems to need it despite documenting
23 not to need it (helpfully pointed out by Tilghman Lesher). 247 not to need it (helpfully pointed out by Tilghman Lesher).
24 - do not use poll by default on freebsd, it's broken (what isn't 248 - do not use poll by default on freebsd, it's broken (what isn't
25 on freebsd...). 249 on freebsd...).
250 - allow to embed epoll on kernels >= 2.6.32.
26 - configure now prepends -O3, not appends it, so one can still 251 - configure now prepends -O3, not appends it, so one can still
27 override it. 252 override it.
253 - ev.pod: greatly expanded the portability section, added a porting
254 section, a description of watcher states and made lots of minor fixes.
28 - disable poll backend on AIX, the poll header spams the namespace 255 - disable poll backend on AIX, the poll header spams the namespace
29 and it's not worth working around dead platforms (reported 256 and it's not worth working around dead platforms (reported
30 and analyzed by Aivars Kalvans). 257 and analyzed by Aivars Kalvans).
31 - improve header file compatibility of the standalone eventfd code 258 - improve header file compatibility of the standalone eventfd code
32 in an obscure case. 259 in an obscure case.
… …
35 no sscanf dependency). 262 no sscanf dependency).
36 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings. 263 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
37 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs. 264 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
38 - add section on accept() problems to the manpage. 265 - add section on accept() problems to the manpage.
39 - rename EV_TIMEOUT to EV_TIMER. 266 - rename EV_TIMEOUT to EV_TIMER.
40 - rename ev_loop_count/depth/verify. 267 - rename ev_loop_count/depth/verify/loop/unloop.
268 - remove ev_default_destroy and ev_default_fork.
41 - switch to two-digit minor version. 269 - switch to two-digit minor version.
42 - work around an apparent gentoo compiler bug. 270 - work around an apparent gentoo compiler bug.
271 - define _DARWIN_UNLIMITED_SELECT. just so.
272 - use enum instead of #define for most constants.
273 - improve compatibility to older C++ compilers.
274 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
275 default arguments when compiled as C++.
276 - enable automake dependency tracking.
277 - ev_loop_new no longer leaks memory when loop creation failed.
278 - new ev_cleanup watcher type.
43 279
443.9 Thu Dec 31 07:59:59 CET 2009 2803.9 Thu Dec 31 07:59:59 CET 2009
45 - signalfd is no longer used by default and has to be requested 281 - signalfd is no longer used by default and has to be requested
46 explicitly - this means that easy to catch bugs become hard to 282 explicitly - this means that easy to catch bugs become hard to
47 catch race conditions, but the users have spoken. 283 catch race conditions, but the users have spoken.
48 - point out the unspecified signal mask in the documentation, and 284 - point out the unspecified signal mask in the documentation, and
49 that this is a race condition regardless of EV_SIGNALFD. 285 that this is a race condition regardless of EV_SIGNALFD.
50 - backport inotify code to C89. 286 - backport inotify code to C89.
51 - inotify file descriptors could leak into child processes. 287 - inotify file descriptors could leak into child processes.
52 - ev_stat watchers could keep an errornous extra ref on the loop, 288 - ev_stat watchers could keep an erroneous extra ref on the loop,
53 preventing exit when unregistering all watchers (testcases 289 preventing exit when unregistering all watchers (testcases
54 provided by ry@tinyclouds.org). 290 provided by ry@tinyclouds.org).
55 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration 291 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
56 symbols to make it easier for apps to do their own fd management. 292 symbols to make it easier for apps to do their own fd management.
57 - support EV_IDLE_ENABLE being disabled in ev++.h 293 - support EV_IDLE_ENABLE being disabled in ev++.h
… …
63 - changed minimum glibc requirement from glibc 2.9 to 2.7, for 299 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
64 signalfd. 300 signalfd.
65 - add missing string.h include (Denis F. Latypoff). 301 - add missing string.h include (Denis F. Latypoff).
66 - only replace ev_stat.prev when we detect an actual difference, 302 - only replace ev_stat.prev when we detect an actual difference,
67 so prev is (almost) always different to attr. this might 303 so prev is (almost) always different to attr. this might
68 have caused the probems with 04_stat.t. 304 have caused the problems with 04_stat.t.
69 - add ev::timer->remaining () method to C++ API. 305 - add ev::timer->remaining () method to C++ API.
70 306
713.8 Sun Aug 9 14:30:45 CEST 2009 3073.8 Sun Aug 9 14:30:45 CEST 2009
72 - incompatible change: do not necessarily reset signal handler 308 - incompatible change: do not necessarily reset signal handler
73 to SIG_DFL when a sighandler is stopped. 309 to SIG_DFL when a sighandler is stopped.
74 - ev_default_destroy did not properly free or zero some members, 310 - ev_default_destroy did not properly free or zero some members,
75 potentially causing crashes and memory corruption on repated 311 potentially causing crashes and memory corruption on repeated
76 ev_default_destroy/ev_default_loop calls. 312 ev_default_destroy/ev_default_loop calls.
77 - take advantage of signalfd on GNU/Linux systems. 313 - take advantage of signalfd on GNU/Linux systems.
78 - document that the signal mask might be in an unspecified 314 - document that the signal mask might be in an unspecified
79 state when using libev's signal handling. 315 state when using libev's signal handling.
80 - take advantage of some GNU/Linux calls to set cloexec/nonblock 316 - take advantage of some GNU/Linux calls to set cloexec/nonblock
… …
115 - correctly zero the idx values for arrays, so destroying and 351 - correctly zero the idx values for arrays, so destroying and
116 reinitialising the default loop actually works (patch by 352 reinitialising the default loop actually works (patch by
117 Malek Hadj-Ali). 353 Malek Hadj-Ali).
118 - implement ev_suspend and ev_resume. 354 - implement ev_suspend and ev_resume.
119 - new EV_CUSTOM revents flag for use by applications. 355 - new EV_CUSTOM revents flag for use by applications.
120 - add documentation section about priorites. 356 - add documentation section about priorities.
121 - add a glossary to the dcoumentation. 357 - add a glossary to the documentation.
122 - extend the ev_fork description slightly. 358 - extend the ev_fork description slightly.
123 - optimize a jump out of call_pending. 359 - optimize a jump out of call_pending.
124 360
1253.53 Sun Feb 15 02:38:20 CET 2009 3613.53 Sun Feb 15 02:38:20 CET 2009
126 - fix a bug in event pipe creation on win32 that would cause a 362 - fix a bug in event pipe creation on win32 that would cause a
… …
202 do similar changes for event.c. 438 do similar changes for event.c.
203 439
2043.45 Tue Oct 21 21:59:26 CEST 2008 4403.45 Tue Oct 21 21:59:26 CEST 2008
205 - disable inotify usage on linux <2.6.25, as it is broken 441 - disable inotify usage on linux <2.6.25, as it is broken
206 (reported by Yoann Vandoorselaere). 442 (reported by Yoann Vandoorselaere).
207 - ev_stat errornously would try to add inotify watchers 443 - ev_stat erroneously would try to add inotify watchers
208 even when inotify wasn't available (this should only 444 even when inotify wasn't available (this should only
209 have a performance impact). 445 have a performance impact).
210 - ev_once now passes both timeout and io to the callback if both 446 - ev_once now passes both timeout and io to the callback if both
211 occur concurrently, instead of giving timeouts precedence. 447 occur concurrently, instead of giving timeouts precedence.
212 - disable EV_USE_INOTIFY when sys/inotify.h is too old. 448 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
… …
280 - enable inlining with gcc versions 2 and 3. 516 - enable inlining with gcc versions 2 and 3.
281 - work around broken poll implementations potentially 517 - work around broken poll implementations potentially
282 not clearing revents field in ev_poll (Brandon Black) 518 not clearing revents field in ev_poll (Brandon Black)
283 (no such systems are known at this time). 519 (no such systems are known at this time).
284 - work around a bug in realloc on openbsd and darwin, 520 - work around a bug in realloc on openbsd and darwin,
285 also makes the errornous valgrind complaints 521 also makes the erroneous valgrind complaints
286 go away (noted by various people). 522 go away (noted by various people).
287 - fix ev_async_pending, add c++ wrapper for ev_async 523 - fix ev_async_pending, add c++ wrapper for ev_async
288 (based on patch sent by Johannes Deisenhofer. 524 (based on patch sent by Johannes Deisenhofer).
289 - add sensible set method to ev::embed. 525 - add sensible set method to ev::embed.
290 - made integer constants type int in ev.h. 526 - made integer constants type int in ev.h.
291 527
2923.2 Wed Apr 2 17:11:19 CEST 2008 5283.2 Wed Apr 2 17:11:19 CEST 2008
293 - fix a 64 bit overflow issue in the select backend, 529 - fix a 64 bit overflow issue in the select backend,

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