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Comparing libev/Changes (file contents):
Revision 1.239 by sf-exg, Thu Aug 25 17:39:43 2011 UTC vs.
Revision 1.360 by root, Wed Jan 22 13:06:53 2020 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_wakeup 3TODO: for next ABI/API change, consider moving EV__IOFDSSET into io->fd instead and provide a getter.
4TODO: document EV_TSTAMP_T
4 5
5TODO: EV_NO_THREADS/NO_SMP and/or EV_USE_PTHREADS or so. also document. 6TODO: maybe allow events = 0 for io watchers
6TODO: #define EV_API_DECL static? ev_default_loop_ptr? 7 - the 4.31 timerfd code wrongly changes the priority of the signal
74.10 8 fd watcher, which is usually harmless unless signal fds are
9 also used (found via cpan tester service).
10 - the documentation wrongly claimed that user may modify fd and events
11 members in io watchers when the wqatcher was stopped
12 (found by b_jonas).
13 - new ev_io_modify mutator which changes only the events member,
14 which can be faster.
15 - officially allow a zero events mask for io watchers. this should
16 work with older libev versions as well but was not officially
17 allowed before.
18 - do not wake up every minute when timerfd is used to detect timejumps.
19 - support a lot more "uncommon" compile time configurations,
20 such as ev_embed enabled but ev_timer disabled.
21 - the linux aio backend is no longer compiled in by default.
22 - update to libecb version 0x00010008.
23
244.31 Fri Dec 20 21:58:29 CET 2019
25 - handle backends with minimum wait time a bit better by not
26 waiting in the presence of already-expired timers
27 (behaviour reported by Felipe Gasper).
28 - new feature: use timerfd to detect timejumps quickly,
29 can be disabled with the new EVFLAG_NOTIMERFD loop flag.
30 - document EV_USE_SIGNALFD feature macro.
31
324.30 (EV only)
33 - change non-autoconf test for __kernel_rwf_t by testing
34 LINUX_VERSION_CODE, the most direct test I could find.
35 - fix a bug in the io_uring backend that polled the wrong
36 backend fd, causing it to not work in many cases.
37
384.29 (EV only)
39 - add io uring autoconf and non-autoconf detection.
40 - disable io_uring when some header files are too old.
41
424.28 (EV only)
43 - linuxaio backend resulted in random memory corruption
44 when loop is forked.
45 - linuxaio backend might have tried to cancel an iocb
46 multiple times (was unable to trigger this).
47 - linuxaio backend now employs a generation counter to
48 avoid handling spurious events from cancelled requests.
49 - io_cancel can return EINTR, deal with it. also, assume
50 io_submit also returns EINTR.
51 - fix some other minor bugs in linuxaio backend.
52 - ev_tstamp type can now be overriden by defining EV_TSTAMP_T.
53 - cleanup: replace expect_true/false and noinline by their
54 libecb counterparts.
55 - move syscall infrastructure from ev_linuxaio.c to ev.c.
56 - prepare io_uring integration.
57 - tweak ev_floor.
58 - epoll, poll, win32 Sleep and other places that use millisecond
59 reslution now all try to round up times.
60 - solaris port backend didn't compile.
61 - abstract time constants into their macros, for more flexibility.
62
634.27 Thu Jun 27 22:43:44 CEST 2019
64 - linux aio backend almost completely rewritten to work around its
65 limitations.
66 - linux aio backend now requires linux 4.19+.
67 - epoll backend now mandatory for linux aio backend.
68 - fail assertions more aggressively on invalid fd's detected
69 in the event loop, do not just silently fd_kill in case of
70 user error.
71 - ev_io_start/ev_io_stop now verify the watcher fd using
72 a syscall when EV_VERIFY is 2 or higher.
73
744.26 (EV only)
75 - update to libecb 0x00010006.
76 - new experimental linux aio backend (linux 4.18+).
77 - removed redundant 0-ptr check in ev_once.
78 - updated/extended ev_set_allocator documentation.
79 - replaced EMPTY2 macro by array_needsize_noinit.
80 - minor code cleanups.
81 - epoll backend now uses epoll_create1 also after fork.
82
834.25 Fri Dec 21 07:49:20 CET 2018
84 - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
85 (EV_THROW still provided) and now uses noexcept on C++11 or newer.
86 - move the darwin select workaround higher in ev.c, as newer versions of
87 darwin managed to break their broken select even more.
88 - ANDROID => __ANDROID__ (reported by enh@google.com).
89 - disable epoll_create1 on android because it has broken header files
90 and google is unwilling to fix them (reported by enh@google.com).
91 - avoid a minor compilation warning on win32.
92 - c++: remove deprecated dynamic throw() specifications.
93 - c++: improve the (unsupported) bad_loop exception class.
94 - backport perl ev_periodic example to C, untested.
95 - update libecb, biggets change is to include a memory fence
96 in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
97 - minor autoconf/automake modernisation.
98
994.24 Wed Dec 28 05:19:55 CET 2016
100 - bump version to 4.24, as the release tarball inexplicably
101 didn't have the right version in ev.h, even though the cvs-tagged
102 version did have the right one (reported by Ales Teska).
103
1044.23 Wed Nov 16 18:23:41 CET 2016
105 - move some declarations at the beginning to help certain retarded
106 microsoft compilers, even though their documentation claims
107 otherwise (reported by Ruslan Osmanov).
108
1094.22 Sun Dec 20 22:11:50 CET 2015
110 - when epoll detects unremovable fds in the fd set, rebuild
111 only the epoll descriptor, not the signal pipe, to avoid
112 SIGPIPE in ev_async_send. This doesn't solve it on fork,
113 so document what needs to be done in ev_loop_fork
114 (analyzed by Benjamin Mahler).
115 - remove superfluous sys/timeb.h include on win32
116 (analyzed by Jason Madden).
117 - updated libecb.
118
1194.20 Sat Jun 20 13:01:43 CEST 2015
120 - prefer noexcept over throw () with C++ 11.
121 - update ecb.h due to incompatibilities with c11.
122 - fix a potential aliasing issue when reading and writing
123 watcher callbacks.
124
1254.19 Thu Sep 25 08:18:25 CEST 2014
126 - ev.h wasn't valid C++ anymore, which tripped compilers other than
127 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
128 C++ doesn't support typedefs for function pointers fully, so the affected
129 declarations have to spell out the types each time.
130 - when not using autoconf, tighten the check for clock_gettime and related
131 functionality.
132
1334.18 Fri Sep 5 17:55:26 CEST 2014
134 - events on files were not always generated properly with the
135 epoll backend (testcase by Assaf Inbal).
136 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
137 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
138 - use a reasonable fallback for EV_NSIG instead of erroring out
139 when we can't detect the signal set size.
140 - in the absence of autoconf, do not use the clock syscall
141 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
142 doing clock_gettime in userspace).
143 - ensure extern "C" function pointers are used for externally-visible
144 loop callbacks (not watcher callbacks yet).
145 - (ecb) work around memory barriers and volatile apparently both being
146 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
147
1484.15 Fri Mar 1 12:04:50 CET 2013
149 - destroying a non-default loop would stop the global waitpid
150 watcher (Denis Bilenko).
151 - queueing pending watchers of higher priority from a watcher now invokes
152 them in a timely fashion (reported by Denis Bilenko).
153 - add throw() to all libev functions that cannot throw exceptions, for
154 further code size decrease when compiling for C++.
155 - add throw () to callbacks that must not throw exceptions (allocator,
156 syserr, loop acquire/release, periodic reschedule cbs).
157 - fix event_base_loop return code, add event_get_callback, event_base_new,
158 event_base_get_method calls to improve libevent 1.x emulation and add
159 some libevent 2.x functionality (based on a patch by Jeff Davey).
160 - add more memory fences to fix a bug reported by Jeff Davey. Better
161 be overfenced than underprotected.
162 - ev_run now returns a boolean status (true meaning watchers are
163 still active).
164 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
165 libev's EV_ERROR (reported by 191919).
166 - (ecb) add memory fence support for xlC (Darin McBride).
167 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
168 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
169 - work around some kernels losing file descriptors by leaking
170 the kqueue descriptor in the child.
171 - work around linux inotify not reporting IN_ATTRIB changes for directories
172 in many cases.
173 - include sys/syscall.h instead of plain syscall.h.
174 - check for io watcher loops in ev_verify, check for the most
175 common reported usage bug in ev_io_start.
176 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
177 - always use WSASend/WSARecv directly on windows, hoping that this
178 works in all cases (unlike read/write/send/recv...).
179 - try to detect signals around a fork faster (test program by
180 Denis Bilenko).
181 - work around recent glibc versions that leak memory in realloc.
182 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
183 the watcher base set (loop) method.
184 - rewrite the async/signal pipe logic to always keep a valid fd, which
185 simplifies (and hopefully correctifies :) the race checking
186 on fork, at the cost of one extra fd.
187 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
188 inotify-supporting filesystems.
189 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
190 versions ignore it before
191 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
192 - add some untested android support.
193 - enum expressions must be of type int (reported by Juan Pablo L).
194
1954.11 Sat Feb 4 19:52:39 CET 2012
196 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
197 was documented already, but not implemented in the repeating case.
198 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
8 - fix a race where the workaround against the epoll fork bugs 199 - fix a race where the workaround against the epoll fork bugs
9 caused signals to not be handled anymore. 200 caused signals to not be handled anymore.
10 - correct backend_fudge for most backends, and implement a windows 201 - correct backend_fudge for most backends, and implement a windows
11 specific workaround to avoid looping because we call both 202 specific workaround to avoid looping because we call both
12 select and Sleep, both with different time resolutions. 203 select and Sleep, both with different time resolutions.
… …
19 own floor () if it is missing. This should make it easier to embed, 210 own floor () if it is missing. This should make it easier to embed,
20 as no external libraries are required. 211 as no external libraries are required.
21 - strategically import macros from libecb and mark rarely-used functions 212 - strategically import macros from libecb and mark rarely-used functions
22 as cache-cold (saving almost 2k code size on typical amd64 setups). 213 as cache-cold (saving almost 2k code size on typical amd64 setups).
23 - add Symbols.ev and Symbols.event files, that were missing. 214 - add Symbols.ev and Symbols.event files, that were missing.
215 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
216 - fix #3 "be smart about timeouts" to not "deadlock" when
217 timeout == now, also improve the section overall.
218 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
219 - support new EV_API_STATIC mode to make all libev symbols
220 static.
221 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
222 were empty.
24 223
254.04 Wed Feb 16 09:01:51 CET 2011 2244.04 Wed Feb 16 09:01:51 CET 2011
26 - fix two problems in the native win32 backend, where reuse of fd's 225 - fix two problems in the native win32 backend, where reuse of fd's
27 with different underlying handles caused handles not to be removed 226 with different underlying handles caused handles not to be removed
28 or added to the select set (analyzed and tested by Bert Belder). 227 or added to the select set (analyzed and tested by Bert Belder).
… …
114 catch race conditions, but the users have spoken. 313 catch race conditions, but the users have spoken.
115 - point out the unspecified signal mask in the documentation, and 314 - point out the unspecified signal mask in the documentation, and
116 that this is a race condition regardless of EV_SIGNALFD. 315 that this is a race condition regardless of EV_SIGNALFD.
117 - backport inotify code to C89. 316 - backport inotify code to C89.
118 - inotify file descriptors could leak into child processes. 317 - inotify file descriptors could leak into child processes.
119 - ev_stat watchers could keep an errornous extra ref on the loop, 318 - ev_stat watchers could keep an erroneous extra ref on the loop,
120 preventing exit when unregistering all watchers (testcases 319 preventing exit when unregistering all watchers (testcases
121 provided by ry@tinyclouds.org). 320 provided by ry@tinyclouds.org).
122 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration 321 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
123 symbols to make it easier for apps to do their own fd management. 322 symbols to make it easier for apps to do their own fd management.
124 - support EV_IDLE_ENABLE being disabled in ev++.h 323 - support EV_IDLE_ENABLE being disabled in ev++.h
… …
182 - correctly zero the idx values for arrays, so destroying and 381 - correctly zero the idx values for arrays, so destroying and
183 reinitialising the default loop actually works (patch by 382 reinitialising the default loop actually works (patch by
184 Malek Hadj-Ali). 383 Malek Hadj-Ali).
185 - implement ev_suspend and ev_resume. 384 - implement ev_suspend and ev_resume.
186 - new EV_CUSTOM revents flag for use by applications. 385 - new EV_CUSTOM revents flag for use by applications.
187 - add documentation section about priorites. 386 - add documentation section about priorities.
188 - add a glossary to the dcoumentation. 387 - add a glossary to the documentation.
189 - extend the ev_fork description slightly. 388 - extend the ev_fork description slightly.
190 - optimize a jump out of call_pending. 389 - optimize a jump out of call_pending.
191 390
1923.53 Sun Feb 15 02:38:20 CET 2009 3913.53 Sun Feb 15 02:38:20 CET 2009
193 - fix a bug in event pipe creation on win32 that would cause a 392 - fix a bug in event pipe creation on win32 that would cause a

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