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Comparing libev/Changes (file contents):
Revision 1.257 by root, Mon Apr 2 23:46:27 2012 UTC vs.
Revision 1.358 by root, Wed Jan 22 02:00:13 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: revisit 59.x timer in the light of modern powersaving
4TODO: EV_STANDALONE == NO_HASSEL (do not use clock_gettime in ev_standalone) 4TODO: ^ maybe just increase it when timerfd, modern linux only thing that counts?
5TODO: document EV_TSTAMP_T
6TODO: for next ABI/API change, consider moving EV__IOFDSSET into io->fd instead and provide a getter.
5 7
6TODO: document WSA_EV_USE_SOCKET in win32 part 8TODO: maybe allow events = 0 for io watchers
7TODO: ^ OR use WSASend/WSARecv on the handle, which always works 9 - the 4.31 timerfd code wrongly changes the priority of the signal
10 fd watcher, which is usually harmless unless signal fds are
11 also used (found via cpan tester service).
12 - the documentation wrongly claimed that user may modify fd and events
13 members in io watchers when the wqatcher was stopped
14 (found by b_jonas).
15 - new ev_io_modify mutator which changes only the events member,
16 which cna be faster.
17 - do not wake up every minute when timerfd is used to detect timejumps.
18 - support a lot more "uncommon" compile time configurations,
19 such as ev_embed enabled but ev_timer disabled.
20 - the linux aio backend is no longer compiled in by default.
21 - update to libecb version 0x00010008.
8 22
234.31 Fri Dec 20 21:58:29 CET 2019
24 - handle backends with minimum wait time a bit better by not
25 waiting in the presence of already-expired timers
26 (behaviour reported by Felipe Gasper).
27 - new feature: use timerfd to detect timejumps quickly,
28 can be disabled with the new EVFLAG_NOTIMERFD loop flag.
29 - document EV_USE_SIGNALFD feature macro.
30
314.30 (EV only)
32 - change non-autoconf test for __kernel_rwf_t by testing
33 LINUX_VERSION_CODE, the most direct test I could find.
34 - fix a bug in the io_uring backend that polled the wrong
35 backend fd, causing it to not work in many cases.
36
374.29 (EV only)
38 - add io uring autoconf and non-autoconf detection.
39 - disable io_uring when some header files are too old.
40
414.28 (EV only)
42 - linuxaio backend resulted in random memory corruption
43 when loop is forked.
44 - linuxaio backend might have tried to cancel an iocb
45 multiple times (was unable to trigger this).
46 - linuxaio backend now employs a generation counter to
47 avoid handling spurious events from cancelled requests.
48 - io_cancel can return EINTR, deal with it. also, assume
49 io_submit also returns EINTR.
50 - fix some other minor bugs in linuxaio backend.
51 - ev_tstamp type can now be overriden by defining EV_TSTAMP_T.
52 - cleanup: replace expect_true/false and noinline by their
53 libecb counterparts.
54 - move syscall infrastructure from ev_linuxaio.c to ev.c.
55 - prepare io_uring integration.
56 - tweak ev_floor.
57 - epoll, poll, win32 Sleep and other places that use millisecond
58 reslution now all try to round up times.
59 - solaris port backend didn't compile.
60 - abstract time constants into their macros, for more flexibility.
61
624.27 Thu Jun 27 22:43:44 CEST 2019
63 - linux aio backend almost completely rewritten to work around its
64 limitations.
65 - linux aio backend now requires linux 4.19+.
66 - epoll backend now mandatory for linux aio backend.
67 - fail assertions more aggressively on invalid fd's detected
68 in the event loop, do not just silently fd_kill in case of
69 user error.
70 - ev_io_start/ev_io_stop now verify the watcher fd using
71 a syscall when EV_VERIFY is 2 or higher.
72
734.26 (EV only)
74 - update to libecb 0x00010006.
75 - new experimental linux aio backend (linux 4.18+).
76 - removed redundant 0-ptr check in ev_once.
77 - updated/extended ev_set_allocator documentation.
78 - replaced EMPTY2 macro by array_needsize_noinit.
79 - minor code cleanups.
80 - epoll backend now uses epoll_create1 also after fork.
81
824.25 Fri Dec 21 07:49:20 CET 2018
83 - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
84 (EV_THROW still provided) and now uses noexcept on C++11 or newer.
85 - move the darwin select workaround higher in ev.c, as newer versions of
86 darwin managed to break their broken select even more.
87 - ANDROID => __ANDROID__ (reported by enh@google.com).
88 - disable epoll_create1 on android because it has broken header files
89 and google is unwilling to fix them (reported by enh@google.com).
90 - avoid a minor compilation warning on win32.
91 - c++: remove deprecated dynamic throw() specifications.
92 - c++: improve the (unsupported) bad_loop exception class.
93 - backport perl ev_periodic example to C, untested.
94 - update libecb, biggets change is to include a memory fence
95 in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
96 - minor autoconf/automake modernisation.
97
984.24 Wed Dec 28 05:19:55 CET 2016
99 - bump version to 4.24, as the release tarball inexplicably
100 didn't have the right version in ev.h, even though the cvs-tagged
101 version did have the right one (reported by Ales Teska).
102
1034.23 Wed Nov 16 18:23:41 CET 2016
104 - move some declarations at the beginning to help certain retarded
105 microsoft compilers, even though their documentation claims
106 otherwise (reported by Ruslan Osmanov).
107
1084.22 Sun Dec 20 22:11:50 CET 2015
109 - when epoll detects unremovable fds in the fd set, rebuild
110 only the epoll descriptor, not the signal pipe, to avoid
111 SIGPIPE in ev_async_send. This doesn't solve it on fork,
112 so document what needs to be done in ev_loop_fork
113 (analyzed by Benjamin Mahler).
114 - remove superfluous sys/timeb.h include on win32
115 (analyzed by Jason Madden).
116 - updated libecb.
117
1184.20 Sat Jun 20 13:01:43 CEST 2015
119 - prefer noexcept over throw () with C++ 11.
120 - update ecb.h due to incompatibilities with c11.
121 - fix a potential aliasing issue when reading and writing
122 watcher callbacks.
123
1244.19 Thu Sep 25 08:18:25 CEST 2014
125 - ev.h wasn't valid C++ anymore, which tripped compilers other than
126 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
127 C++ doesn't support typedefs for function pointers fully, so the affected
128 declarations have to spell out the types each time.
129 - when not using autoconf, tighten the check for clock_gettime and related
130 functionality.
131
1324.18 Fri Sep 5 17:55:26 CEST 2014
133 - events on files were not always generated properly with the
134 epoll backend (testcase by Assaf Inbal).
135 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
136 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
137 - use a reasonable fallback for EV_NSIG instead of erroring out
138 when we can't detect the signal set size.
139 - in the absence of autoconf, do not use the clock syscall
140 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
141 doing clock_gettime in userspace).
142 - ensure extern "C" function pointers are used for externally-visible
143 loop callbacks (not watcher callbacks yet).
144 - (ecb) work around memory barriers and volatile apparently both being
145 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
146
1474.15 Fri Mar 1 12:04:50 CET 2013
148 - destroying a non-default loop would stop the global waitpid
149 watcher (Denis Bilenko).
150 - queueing pending watchers of higher priority from a watcher now invokes
151 them in a timely fashion (reported by Denis Bilenko).
152 - add throw() to all libev functions that cannot throw exceptions, for
153 further code size decrease when compiling for C++.
154 - add throw () to callbacks that must not throw exceptions (allocator,
155 syserr, loop acquire/release, periodic reschedule cbs).
9 - fix event_base_loop return code, add event_get_callback, event_base_new, 156 - fix event_base_loop return code, add event_get_callback, event_base_new,
10 event_base_get_method calls to improve libevent 1.x emulation and add 157 event_base_get_method calls to improve libevent 1.x emulation and add
11 some libevent 2.x funcitonality (based on a patch by Jeff Davey). 158 some libevent 2.x functionality (based on a patch by Jeff Davey).
159 - add more memory fences to fix a bug reported by Jeff Davey. Better
160 be overfenced than underprotected.
12 - ev_run now returns a boolean status (true meaning watchers are 161 - ev_run now returns a boolean status (true meaning watchers are
13 still active). 162 still active).
14 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with 163 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
15 libev's EV_ERROR (reported by 191919). 164 libev's EV_ERROR (reported by 191919).
16 - (ecb) add memory fence support for xlC (Darin McBride). 165 - (ecb) add memory fence support for xlC (Darin McBride).
17 - (ecb) add memory fence support for gcc-mips (Anton Kirilov). 166 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
167 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
18 - work around some kernels losing file descriptors by leaking 168 - work around some kernels losing file descriptors by leaking
19 the kqueue descriptor in the child. 169 the kqueue descriptor in the child.
170 - work around linux inotify not reporting IN_ATTRIB changes for directories
171 in many cases.
172 - include sys/syscall.h instead of plain syscall.h.
173 - check for io watcher loops in ev_verify, check for the most
174 common reported usage bug in ev_io_start.
175 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
176 - always use WSASend/WSARecv directly on windows, hoping that this
177 works in all cases (unlike read/write/send/recv...).
178 - try to detect signals around a fork faster (test program by
179 Denis Bilenko).
180 - work around recent glibc versions that leak memory in realloc.
181 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
182 the watcher base set (loop) method.
183 - rewrite the async/signal pipe logic to always keep a valid fd, which
184 simplifies (and hopefully correctifies :) the race checking
185 on fork, at the cost of one extra fd.
186 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
187 inotify-supporting filesystems.
188 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
189 versions ignore it before
190 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
191 - add some untested android support.
192 - enum expressions must be of type int (reported by Juan Pablo L).
20 193
214.11 Sat Feb 4 19:52:39 CET 2012 1944.11 Sat Feb 4 19:52:39 CET 2012
22 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as 195 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
23 was documented already, but not implemented in the repeating case. 196 was documented already, but not implemented in the repeating case.
24 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS. 197 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
… …
208 reinitialising the default loop actually works (patch by 381 reinitialising the default loop actually works (patch by
209 Malek Hadj-Ali). 382 Malek Hadj-Ali).
210 - implement ev_suspend and ev_resume. 383 - implement ev_suspend and ev_resume.
211 - new EV_CUSTOM revents flag for use by applications. 384 - new EV_CUSTOM revents flag for use by applications.
212 - add documentation section about priorities. 385 - add documentation section about priorities.
213 - add a glossary to the dcoumentation. 386 - add a glossary to the documentation.
214 - extend the ev_fork description slightly. 387 - extend the ev_fork description slightly.
215 - optimize a jump out of call_pending. 388 - optimize a jump out of call_pending.
216 389
2173.53 Sun Feb 15 02:38:20 CET 2009 3903.53 Sun Feb 15 02:38:20 CET 2009
218 - fix a bug in event pipe creation on win32 that would cause a 391 - fix a bug in event pipe creation on win32 that would cause a

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