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Comparing libev/Changes (file contents):
Revision 1.226 by root, Sun Feb 20 02:56:55 2011 UTC vs.
Revision 1.370 by root, Sat Jun 3 08:53:03 2023 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_loop_prefork hint? 3TODO: for next ABI/API change, consider moving EV__IOFDSSET into io->fd instead and provide a getter.
4TODO: document EV_TSTAMP_T
5TODO: https://paste.debian.net/1268417/, stdfun
4 6
7 - libev did not compile on systems lacking clock_gettime.
8 - due to a logic bug, timerfd availability did not always translate
9 into fewer wakeups - libev is now more aggressive in using
10 longer sleeps, even when timerfd is not in use.
11
124.33 Wed Mar 18 13:22:29 CET 2020
13 - no changes w.r.t. 4.32.
14
154.32 (EV only)
16 - the 4.31 timerfd code wrongly changed the priority of the signal
17 fd watcher, which is usually harmless unless signal fds are
18 also used (found via cpan tester service).
19 - the documentation wrongly claimed that user may modify fd and events
20 members in io watchers when the watcher was stopped
21 (found by b_jonas).
22 - new ev_io_modify mutator which changes only the events member,
23 which can be faster. also added ev::io::set (int events) method
24 to ev++.h.
25 - officially allow a zero events mask for io watchers. this should
26 work with older libev versions as well but was not officially
27 allowed before.
28 - do not wake up every minute when timerfd is used to detect timejumps.
29 - do not wake up every minute when periodics are disabled and we have
30 a monotonic clock.
31 - support a lot more "uncommon" compile time configurations,
32 such as ev_embed enabled but ev_timer disabled.
33 - use a start/stop wrapper class to reduce code duplication in
34 ev++.h and make it needlessly more c++-y.
35 - the linux aio backend is no longer compiled in by default.
36 - update to libecb version 0x00010008.
37
384.31 Fri Dec 20 21:58:29 CET 2019
39 - handle backends with minimum wait time a bit better by not
40 waiting in the presence of already-expired timers
41 (behaviour reported by Felipe Gasper).
42 - new feature: use timerfd to detect timejumps quickly,
43 can be disabled with the new EVFLAG_NOTIMERFD loop flag.
44 - document EV_USE_SIGNALFD feature macro.
45
464.30 (EV only)
47 - change non-autoconf test for __kernel_rwf_t by testing
48 LINUX_VERSION_CODE, the most direct test I could find.
49 - fix a bug in the io_uring backend that polled the wrong
50 backend fd, causing it to not work in many cases.
51
524.29 (EV only)
53 - add io uring autoconf and non-autoconf detection.
54 - disable io_uring when some header files are too old.
55
564.28 (EV only)
57 - linuxaio backend resulted in random memory corruption
58 when loop is forked.
59 - linuxaio backend might have tried to cancel an iocb
60 multiple times (was unable to trigger this).
61 - linuxaio backend now employs a generation counter to
62 avoid handling spurious events from cancelled requests.
63 - io_cancel can return EINTR, deal with it. also, assume
64 io_submit also returns EINTR.
65 - fix some other minor bugs in linuxaio backend.
66 - ev_tstamp type can now be overriden by defining EV_TSTAMP_T.
67 - cleanup: replace expect_true/false and noinline by their
68 libecb counterparts.
69 - move syscall infrastructure from ev_linuxaio.c to ev.c.
70 - prepare io_uring integration.
71 - tweak ev_floor.
72 - epoll, poll, win32 Sleep and other places that use millisecond
73 reslution now all try to round up times.
74 - solaris port backend didn't compile.
75 - abstract time constants into their macros, for more flexibility.
76
774.27 Thu Jun 27 22:43:44 CEST 2019
78 - linux aio backend almost completely rewritten to work around its
79 limitations.
80 - linux aio backend now requires linux 4.19+.
81 - epoll backend now mandatory for linux aio backend.
82 - fail assertions more aggressively on invalid fd's detected
83 in the event loop, do not just silently fd_kill in case of
84 user error.
85 - ev_io_start/ev_io_stop now verify the watcher fd using
86 a syscall when EV_VERIFY is 2 or higher.
87
884.26 (EV only)
89 - update to libecb 0x00010006.
90 - new experimental linux aio backend (linux 4.18+).
91 - removed redundant 0-ptr check in ev_once.
92 - updated/extended ev_set_allocator documentation.
93 - replaced EMPTY2 macro by array_needsize_noinit.
94 - minor code cleanups.
95 - epoll backend now uses epoll_create1 also after fork.
96
974.25 Fri Dec 21 07:49:20 CET 2018
98 - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
99 (EV_THROW still provided) and now uses noexcept on C++11 or newer.
100 - move the darwin select workaround higher in ev.c, as newer versions of
101 darwin managed to break their broken select even more.
102 - ANDROID => __ANDROID__ (reported by enh@google.com).
103 - disable epoll_create1 on android because it has broken header files
104 and google is unwilling to fix them (reported by enh@google.com).
105 - avoid a minor compilation warning on win32.
106 - c++: remove deprecated dynamic throw() specifications.
107 - c++: improve the (unsupported) bad_loop exception class.
108 - backport perl ev_periodic example to C, untested.
109 - update libecb, biggets change is to include a memory fence
110 in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
111 - minor autoconf/automake modernisation.
112
1134.24 Wed Dec 28 05:19:55 CET 2016
114 - bump version to 4.24, as the release tarball inexplicably
115 didn't have the right version in ev.h, even though the cvs-tagged
116 version did have the right one (reported by Ales Teska).
117
1184.23 Wed Nov 16 18:23:41 CET 2016
119 - move some declarations at the beginning to help certain retarded
120 microsoft compilers, even though their documentation claims
121 otherwise (reported by Ruslan Osmanov).
122
1234.22 Sun Dec 20 22:11:50 CET 2015
124 - when epoll detects unremovable fds in the fd set, rebuild
125 only the epoll descriptor, not the signal pipe, to avoid
126 SIGPIPE in ev_async_send. This doesn't solve it on fork,
127 so document what needs to be done in ev_loop_fork
128 (analyzed by Benjamin Mahler).
129 - remove superfluous sys/timeb.h include on win32
130 (analyzed by Jason Madden).
131 - updated libecb.
132
1334.20 Sat Jun 20 13:01:43 CEST 2015
134 - prefer noexcept over throw () with C++ 11.
135 - update ecb.h due to incompatibilities with c11.
136 - fix a potential aliasing issue when reading and writing
137 watcher callbacks.
138
1394.19 Thu Sep 25 08:18:25 CEST 2014
140 - ev.h wasn't valid C++ anymore, which tripped compilers other than
141 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
142 C++ doesn't support typedefs for function pointers fully, so the affected
143 declarations have to spell out the types each time.
144 - when not using autoconf, tighten the check for clock_gettime and related
145 functionality.
146
1474.18 Fri Sep 5 17:55:26 CEST 2014
148 - events on files were not always generated properly with the
149 epoll backend (testcase by Assaf Inbal).
150 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
151 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
152 - use a reasonable fallback for EV_NSIG instead of erroring out
153 when we can't detect the signal set size.
154 - in the absence of autoconf, do not use the clock syscall
155 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
156 doing clock_gettime in userspace).
157 - ensure extern "C" function pointers are used for externally-visible
158 loop callbacks (not watcher callbacks yet).
159 - (ecb) work around memory barriers and volatile apparently both being
160 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
161
1624.15 Fri Mar 1 12:04:50 CET 2013
163 - destroying a non-default loop would stop the global waitpid
164 watcher (Denis Bilenko).
165 - queueing pending watchers of higher priority from a watcher now invokes
166 them in a timely fashion (reported by Denis Bilenko).
167 - add throw() to all libev functions that cannot throw exceptions, for
168 further code size decrease when compiling for C++.
169 - add throw () to callbacks that must not throw exceptions (allocator,
170 syserr, loop acquire/release, periodic reschedule cbs).
171 - fix event_base_loop return code, add event_get_callback, event_base_new,
172 event_base_get_method calls to improve libevent 1.x emulation and add
173 some libevent 2.x functionality (based on a patch by Jeff Davey).
174 - add more memory fences to fix a bug reported by Jeff Davey. Better
175 be overfenced than underprotected.
176 - ev_run now returns a boolean status (true meaning watchers are
177 still active).
178 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
179 libev's EV_ERROR (reported by 191919).
180 - (ecb) add memory fence support for xlC (Darin McBride).
181 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
182 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
183 - work around some kernels losing file descriptors by leaking
184 the kqueue descriptor in the child.
185 - work around linux inotify not reporting IN_ATTRIB changes for directories
186 in many cases.
187 - include sys/syscall.h instead of plain syscall.h.
188 - check for io watcher loops in ev_verify, check for the most
189 common reported usage bug in ev_io_start.
190 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
191 - always use WSASend/WSARecv directly on windows, hoping that this
192 works in all cases (unlike read/write/send/recv...).
193 - try to detect signals around a fork faster (test program by
194 Denis Bilenko).
195 - work around recent glibc versions that leak memory in realloc.
196 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
197 the watcher base set (loop) method.
198 - rewrite the async/signal pipe logic to always keep a valid fd, which
199 simplifies (and hopefully correctifies :) the race checking
200 on fork, at the cost of one extra fd.
201 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
202 inotify-supporting filesystems.
203 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
204 versions ignore it before
205 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
206 - add some untested android support.
207 - enum expressions must be of type int (reported by Juan Pablo L).
208
2094.11 Sat Feb 4 19:52:39 CET 2012
210 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
211 was documented already, but not implemented in the repeating case.
212 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
213 - fix a race where the workaround against the epoll fork bugs
214 caused signals to not be handled anymore.
215 - correct backend_fudge for most backends, and implement a windows
216 specific workaround to avoid looping because we call both
217 select and Sleep, both with different time resolutions.
218 - document range and guarantees of ev_sleep.
219 - document reasonable ranges for periodics interval and offset.
220 - rename backend_fudge to backend_mintime to avoid future confusion :)
5 - change the default periodic reschedule function to hopefully be more 221 - change the default periodic reschedule function to hopefully be more
6 exact and correct even in corner cases or in the far future. 222 exact and correct even in corner cases or in the far future.
7 - document reasonable ranges for interval and offset.
8 - do not rely on -lm anymore: use it when available but use our 223 - do not rely on -lm anymore: use it when available but use our
9 own floor () if it is missing. This should make it easier to embed. 224 own floor () if it is missing. This should make it easier to embed,
225 as no external libraries are required.
226 - strategically import macros from libecb and mark rarely-used functions
227 as cache-cold (saving almost 2k code size on typical amd64 setups).
228 - add Symbols.ev and Symbols.event files, that were missing.
229 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
230 - fix #3 "be smart about timeouts" to not "deadlock" when
231 timeout == now, also improve the section overall.
232 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
233 - support new EV_API_STATIC mode to make all libev symbols
234 static.
235 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
236 were empty.
10 237
114.04 Wed Feb 16 09:01:51 CET 2011 2384.04 Wed Feb 16 09:01:51 CET 2011
12 - fix two problems in the native win32 backend, where reuse of fd's 239 - fix two problems in the native win32 backend, where reuse of fd's
13 with different underlying handles caused handles not to be removed 240 with different underlying handles caused handles not to be removed
14 or added to the select set (analyzed and tested by Bert Belder). 241 or added to the select set (analyzed and tested by Bert Belder).
… …
100 catch race conditions, but the users have spoken. 327 catch race conditions, but the users have spoken.
101 - point out the unspecified signal mask in the documentation, and 328 - point out the unspecified signal mask in the documentation, and
102 that this is a race condition regardless of EV_SIGNALFD. 329 that this is a race condition regardless of EV_SIGNALFD.
103 - backport inotify code to C89. 330 - backport inotify code to C89.
104 - inotify file descriptors could leak into child processes. 331 - inotify file descriptors could leak into child processes.
105 - ev_stat watchers could keep an errornous extra ref on the loop, 332 - ev_stat watchers could keep an erroneous extra ref on the loop,
106 preventing exit when unregistering all watchers (testcases 333 preventing exit when unregistering all watchers (testcases
107 provided by ry@tinyclouds.org). 334 provided by ry@tinyclouds.org).
108 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration 335 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
109 symbols to make it easier for apps to do their own fd management. 336 symbols to make it easier for apps to do their own fd management.
110 - support EV_IDLE_ENABLE being disabled in ev++.h 337 - support EV_IDLE_ENABLE being disabled in ev++.h
… …
168 - correctly zero the idx values for arrays, so destroying and 395 - correctly zero the idx values for arrays, so destroying and
169 reinitialising the default loop actually works (patch by 396 reinitialising the default loop actually works (patch by
170 Malek Hadj-Ali). 397 Malek Hadj-Ali).
171 - implement ev_suspend and ev_resume. 398 - implement ev_suspend and ev_resume.
172 - new EV_CUSTOM revents flag for use by applications. 399 - new EV_CUSTOM revents flag for use by applications.
173 - add documentation section about priorites. 400 - add documentation section about priorities.
174 - add a glossary to the dcoumentation. 401 - add a glossary to the documentation.
175 - extend the ev_fork description slightly. 402 - extend the ev_fork description slightly.
176 - optimize a jump out of call_pending. 403 - optimize a jump out of call_pending.
177 404
1783.53 Sun Feb 15 02:38:20 CET 2009 4053.53 Sun Feb 15 02:38:20 CET 2009
179 - fix a bug in event pipe creation on win32 that would cause a 406 - fix a bug in event pipe creation on win32 that would cause a

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