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Revision: 1.357
Committed: Wed Jan 22 01:50:42 2020 UTC (4 years, 4 months ago) by root
Branch: MAIN
Changes since 1.356: +3 -0 lines
Log Message:
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File Contents

# User Rev Content
1 root 1.14 Revision history for libev, a high-performance and full-featured event loop.
2 root 1.1
3 root 1.341 TODO: revisit 59.x timer in the light of modern powersaving
4 root 1.354 TODO: ^ maybe just increase it when timerfd, modern linux only thing that counts?
5 root 1.342 TODO: document EV_TSTAMP_T
6 root 1.357 TODO: for next ABI/API change, consider moving EV__IOFDSSET into io->fd instead and provide a getter.
7 root 1.344
8 root 1.356 TODO: add ev_io_set_events, or ev_io_modify, or ev_io_change, or..., without IOFDSET
9 root 1.357 TODO: fix documentation of read-only] [read-write] and so on
10     TODO: maybe allow events = 0 for io watchers
11 root 1.354 - the 4.31 timerfd code wrongly changes the priority of the signal
12     fd watcher, which is usually harmless unless signal fds are
13 root 1.352 also used (found via cpan tester service).
14 root 1.356 - do not wake up every minute when timerfd is used to detect timejumps.
15 root 1.353 - support a lot more "uncommon" compile time configurations,
16     such as ev_embed enabled but ev_timer disabled.
17 root 1.355 - the linux aio backend is no longer compiled in by default.
18 root 1.356 - update to libecb version 0x00010008.
19 root 1.351
20 root 1.350 4.31 Fri Dec 20 21:58:29 CET 2019
21 root 1.348 - handle backends with minimum wait time a bit better by not
22     waiting in the presence of already-expired timers
23 root 1.349 (behaviour reported by Felipe Gasper).
24     - new feature: use timerfd to detect timejumps quickly,
25     can be disabled with the new EVFLAG_NOTIMERFD loop flag.
26     - document EV_USE_SIGNALFD feature macro.
27 root 1.348
28     4.30 (EV only)
29 root 1.347 - change non-autoconf test for __kernel_rwf_t by testing
30     LINUX_VERSION_CODE, the most direct test I could find.
31 root 1.348 - fix a bug in the io_uring backend that polled the wrong
32     backend fd, causing it to not work in many cases.
33 root 1.347
34 root 1.346 4.29 (EV only)
35     - add io uring autoconf and non-autoconf detection.
36     - disable io_uring when some header files are too old.
37 root 1.345
38 root 1.344 4.28 (EV only)
39 root 1.340 - linuxaio backend resulted in random memory corruption
40     when loop is forked.
41 root 1.335 - linuxaio backend might have tried to cancel an iocb
42     multiple times (was unable to trigger this).
43 root 1.341 - linuxaio backend now employs a generation counter to
44 root 1.342 avoid handling spurious events from cancelled requests.
45 root 1.334 - io_cancel can return EINTR, deal with it. also, assume
46 root 1.341 io_submit also returns EINTR.
47     - fix some other minor bugs in linuxaio backend.
48 root 1.342 - ev_tstamp type can now be overriden by defining EV_TSTAMP_T.
49 root 1.336 - cleanup: replace expect_true/false and noinline by their
50     libecb counterparts.
51 root 1.337 - move syscall infrastructure from ev_linuxaio.c to ev.c.
52     - prepare io_uring integration.
53 root 1.339 - tweak ev_floor.
54 root 1.342 - epoll, poll, win32 Sleep and other places that use millisecond
55     reslution now all try to round up times.
56 root 1.343 - solaris port backend didn't compile.
57     - abstract time constants into their macros, for more flexibility.
58 root 1.334
59 root 1.333 4.27 Thu Jun 27 22:43:44 CEST 2019
60 root 1.334 - linux aio backend almost completely rewritten to work around its
61 root 1.329 limitations.
62 root 1.334 - linux aio backend now requires linux 4.19+.
63 root 1.329 - epoll backend now mandatory for linux aio backend.
64 root 1.330 - fail assertions more aggressively on invalid fd's detected
65     in the event loop, do not just silently fd_kill in case of
66     user error.
67     - ev_io_start/ev_io_stop now verify the watcher fd using
68     a syscall when EV_VERIFY is 2 or higher.
69 root 1.329
70     4.26 (EV only)
71     - update to libecb 0x00010006.
72 root 1.326 - new experimental linux aio backend (linux 4.18+).
73 root 1.324 - removed redundant 0-ptr check in ev_once.
74 root 1.325 - updated/extended ev_set_allocator documentation.
75 root 1.326 - replaced EMPTY2 macro by array_needsize_noinit.
76     - minor code cleanups.
77 root 1.327 - epoll backend now uses epoll_create1 also after fork.
78 root 1.324
79 root 1.320 4.25 Fri Dec 21 07:49:20 CET 2018
80     - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
81 root 1.323 (EV_THROW still provided) and now uses noexcept on C++11 or newer.
82 root 1.339 - move the darwin select workaround higher in ev.c, as newer versions of
83 root 1.316 darwin managed to break their broken select even more.
84 root 1.314 - ANDROID => __ANDROID__ (reported by enh@google.com).
85 root 1.315 - disable epoll_create1 on android because it has broken header files
86     and google is unwilling to fix them (reported by enh@google.com).
87 root 1.317 - avoid a minor compilation warning on win32.
88 root 1.318 - c++: remove deprecated dynamic throw() specifications.
89     - c++: improve the (unsupported) bad_loop exception class.
90 root 1.319 - backport perl ev_periodic example to C, untested.
91 root 1.321 - update libecb, biggets change is to include a memory fence
92     in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
93 root 1.322 - minor autoconf/automake modernisation.
94 root 1.314
95 root 1.313 4.24 Wed Dec 28 05:19:55 CET 2016
96     - bump version to 4.24, as the release tarball inexplicably
97     didn't have the right version in ev.h, even though the cvs-tagged
98     version did have the right one (reported by Ales Teska).
99    
100 root 1.312 4.23 Wed Nov 16 18:23:41 CET 2016
101 root 1.311 - move some declarations at the beginning to help certain retarded
102     microsoft compilers, even though their documentation claims
103     otherwise (reported by Ruslan Osmanov).
104    
105 root 1.310 4.22 Sun Dec 20 22:11:50 CET 2015
106 root 1.308 - when epoll detects unremovable fds in the fd set, rebuild
107     only the epoll descriptor, not the signal pipe, to avoid
108     SIGPIPE in ev_async_send. This doesn't solve it on fork,
109     so document what needs to be done in ev_loop_fork
110     (analyzed by Benjamin Mahler).
111     - remove superfluous sys/timeb.h include on win32
112     (analyzed by Jason Madden).
113 root 1.309 - updated libecb.
114 root 1.308
115 root 1.307 4.20 Sat Jun 20 13:01:43 CEST 2015
116 root 1.302 - prefer noexcept over throw () with C++ 11.
117 root 1.303 - update ecb.h due to incompatibilities with c11.
118 root 1.305 - fix a potential aliasing issue when reading and writing
119 root 1.304 watcher callbacks.
120 root 1.301
121 root 1.300 4.19 Thu Sep 25 08:18:25 CEST 2014
122 root 1.298 - ev.h wasn't valid C++ anymore, which tripped compilers other than
123 root 1.299 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
124     C++ doesn't support typedefs for function pointers fully, so the affected
125     declarations have to spell out the types each time.
126 root 1.297 - when not using autoconf, tighten the check for clock_gettime and related
127     functionality.
128    
129 root 1.296 4.18 Fri Sep 5 17:55:26 CEST 2014
130 root 1.295 - events on files were not always generated properly with the
131     epoll backend (testcase by Assaf Inbal).
132 root 1.288 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
133 root 1.289 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
134 root 1.291 - use a reasonable fallback for EV_NSIG instead of erroring out
135     when we can't detect the signal set size.
136 root 1.292 - in the absence of autoconf, do not use the clock syscall
137     on glibc >= 2.17 (avoids the syscall AND -lrt on systems
138     doing clock_gettime in userspace).
139 root 1.293 - ensure extern "C" function pointers are used for externally-visible
140     loop callbacks (not watcher callbacks yet).
141 root 1.294 - (ecb) work around memory barriers and volatile apparently both being
142     broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
143 root 1.288
144 root 1.287 4.15 Fri Mar 1 12:04:50 CET 2013
145 root 1.271 - destroying a non-default loop would stop the global waitpid
146     watcher (Denis Bilenko).
147 root 1.266 - queueing pending watchers of higher priority from a watcher now invokes
148     them in a timely fashion (reported by Denis Bilenko).
149 root 1.261 - add throw() to all libev functions that cannot throw exceptions, for
150     further code size decrease when compiling for C++.
151     - add throw () to callbacks that must not throw exceptions (allocator,
152     syserr, loop acquire/release, periodic reschedule cbs).
153 root 1.256 - fix event_base_loop return code, add event_get_callback, event_base_new,
154     event_base_get_method calls to improve libevent 1.x emulation and add
155 root 1.273 some libevent 2.x functionality (based on a patch by Jeff Davey).
156 root 1.263 - add more memory fences to fix a bug reported by Jeff Davey. Better
157     be overfenced than underprotected.
158 root 1.256 - ev_run now returns a boolean status (true meaning watchers are
159     still active).
160 root 1.252 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
161     libev's EV_ERROR (reported by 191919).
162 root 1.253 - (ecb) add memory fence support for xlC (Darin McBride).
163     - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
164 root 1.259 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
165 root 1.254 - work around some kernels losing file descriptors by leaking
166     the kqueue descriptor in the child.
167 root 1.282 - work around linux inotify not reporting IN_ATTRIB changes for directories
168     in many cases.
169 root 1.262 - include sys/syscall.h instead of plain syscall.h.
170 root 1.268 - check for io watcher loops in ev_verify, check for the most
171     common reported usage bug in ev_io_start.
172 sf-exg 1.286 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
173 root 1.270 - always use WSASend/WSARecv directly on windows, hoping that this
174     works in all cases (unlike read/write/send/recv...).
175 root 1.274 - try to detect signals around a fork faster (test program by
176     Denis Bilenko).
177 root 1.275 - work around recent glibc versions that leak memory in realloc.
178 root 1.276 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
179     the watcher base set (loop) method.
180 root 1.278 - rewrite the async/signal pipe logic to always keep a valid fd, which
181 sf-exg 1.286 simplifies (and hopefully correctifies :) the race checking
182 root 1.278 on fork, at the cost of one extra fd.
183 root 1.282 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
184     inotify-supporting filesystems.
185 root 1.283 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
186     versions ignore it before
187     (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
188 root 1.284 - add some untested android support.
189 root 1.285 - enum expressions must be of type int (reported by Juan Pablo L).
190 root 1.253
191 root 1.250 4.11 Sat Feb 4 19:52:39 CET 2012
192 root 1.248 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
193     was documented already, but not implemented in the repeating case.
194 root 1.249 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
195 root 1.234 - fix a race where the workaround against the epoll fork bugs
196     caused signals to not be handled anymore.
197 root 1.229 - correct backend_fudge for most backends, and implement a windows
198     specific workaround to avoid looping because we call both
199     select and Sleep, both with different time resolutions.
200 root 1.230 - document range and guarantees of ev_sleep.
201 root 1.231 - document reasonable ranges for periodics interval and offset.
202     - rename backend_fudge to backend_mintime to avoid future confusion :)
203 root 1.225 - change the default periodic reschedule function to hopefully be more
204 root 1.226 exact and correct even in corner cases or in the far future.
205 root 1.225 - do not rely on -lm anymore: use it when available but use our
206 root 1.230 own floor () if it is missing. This should make it easier to embed,
207     as no external libraries are required.
208 root 1.232 - strategically import macros from libecb and mark rarely-used functions
209 sf-exg 1.239 as cache-cold (saving almost 2k code size on typical amd64 setups).
210 root 1.237 - add Symbols.ev and Symbols.event files, that were missing.
211 root 1.242 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
212 root 1.244 - fix #3 "be smart about timeouts" to not "deadlock" when
213     timeout == now, also improve the section overall.
214     - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
215 root 1.245 - support new EV_API_STATIC mode to make all libev symbols
216     static.
217 root 1.251 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
218     were empty.
219 root 1.225
220 root 1.224 4.04 Wed Feb 16 09:01:51 CET 2011
221     - fix two problems in the native win32 backend, where reuse of fd's
222     with different underlying handles caused handles not to be removed
223     or added to the select set (analyzed and tested by Bert Belder).
224 root 1.221 - do no rely on ceil() in ev_e?poll.c.
225 root 1.222 - backport libev to HP-UX versions before 11 v3.
226 root 1.223 - configure did not detect nanosleep and clock_gettime properly when
227     they are available in the libc (as opposed to -lrt).
228 root 1.221
229 root 1.219 4.03 Tue Jan 11 14:37:25 CET 2011
230 root 1.217 - officially support polling files with all backends.
231 root 1.212 - support files, /dev/zero etc. the same way as select in the epoll
232     backend, by generating events on our own.
233 root 1.217 - ports backend: work around solaris bug 6874410 and many related ones
234     (EINTR, maybe more), with no performance loss (note that the solaris
235     bug report is actually wrong, reality is far more bizarre and broken
236     than that).
237 root 1.209 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
238     #ifdef to test for them.
239 root 1.213 - new (experimental) function: ev_feed_signal.
240     - new (to become default) EVFLAG_NOSIGMASK flag.
241     - new EVBACKEND_MASK symbol.
242 root 1.220 - updated COMMON IDIOMS SECTION.
243 root 1.209
244 root 1.207 4.01 Fri Nov 5 21:51:29 CET 2010
245 root 1.205 - automake fucked it up, apparently, --add-missing -f is not quite enough
246 root 1.206 to make it update its files, so 4.00 didn't install ev++.h and
247     event.h on make install. grrr.
248     - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
249 root 1.203 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
250 root 1.204 - use "(libev) " prefix for all libev error messages now.
251 root 1.203
252 root 1.202 4.00 Mon Oct 25 12:32:12 CEST 2010
253 root 1.171 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
254 root 1.161 - ev_embed_stop did not correctly stop the watcher (very good
255     testcase by Vladimir Timofeev).
256 sf-exg 1.191 - ev_run will now always update the current loop time - it erroneously
257 root 1.187 didn't when idle watchers were active, causing timers not to fire.
258 root 1.179 - fix a bug where a timeout of zero caused the timer not to fire
259     in the libevent emulation (testcase by Péter Szabó).
260 root 1.164 - applied win32 fixes by Michael Lenaghan (also James Mansion).
261 root 1.166 - replace EV_MINIMAL by EV_FEATURES.
262 root 1.178 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
263     seems the former is *much* faster than the latter.
264 root 1.197 - linux kernel version detection (for inotify bug workarounds)
265     did not work properly.
266 root 1.185 - reduce the number of spurious wake-ups with the ports backend.
267 root 1.158 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
268 root 1.186 - do async init within ev_async_start, not ev_async_set, which avoids
269     an API quirk where the set function must be called in the C++ API
270     even when there is nothing to set.
271 root 1.174 - add (undocumented) EV_ENABLE when adding events with kqueue,
272 root 1.175 this might help with OS X, which seems to need it despite documenting
273     not to need it (helpfully pointed out by Tilghman Lesher).
274 root 1.176 - do not use poll by default on freebsd, it's broken (what isn't
275     on freebsd...).
276 root 1.195 - allow to embed epoll on kernels >= 2.6.32.
277 root 1.159 - configure now prepends -O3, not appends it, so one can still
278     override it.
279 root 1.190 - ev.pod: greatly expanded the portability section, added a porting
280     section, a description of watcher states and made lots of minor fixes.
281 root 1.160 - disable poll backend on AIX, the poll header spams the namespace
282     and it's not worth working around dead platforms (reported
283     and analyzed by Aivars Kalvans).
284 root 1.162 - improve header file compatibility of the standalone eventfd code
285     in an obscure case.
286 root 1.163 - implement EV_AVOID_STDIO option.
287     - do not use sscanf to parse linux version number (smaller, faster,
288     no sscanf dependency).
289 root 1.164 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
290 sf-exg 1.172 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
291 root 1.165 - add section on accept() problems to the manpage.
292 root 1.168 - rename EV_TIMEOUT to EV_TIMER.
293 root 1.190 - rename ev_loop_count/depth/verify/loop/unloop.
294 root 1.197 - remove ev_default_destroy and ev_default_fork.
295 root 1.168 - switch to two-digit minor version.
296 root 1.180 - work around an apparent gentoo compiler bug.
297 root 1.181 - define _DARWIN_UNLIMITED_SELECT. just so.
298 root 1.188 - use enum instead of #define for most constants.
299     - improve compatibility to older C++ compilers.
300 root 1.193 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
301     default arguments when compiled as C++.
302 root 1.196 - enable automake dependency tracking.
303 root 1.197 - ev_loop_new no longer leaks memory when loop creation failed.
304 root 1.198 - new ev_cleanup watcher type.
305 root 1.157
306 root 1.156 3.9 Thu Dec 31 07:59:59 CET 2009
307 root 1.155 - signalfd is no longer used by default and has to be requested
308     explicitly - this means that easy to catch bugs become hard to
309     catch race conditions, but the users have spoken.
310     - point out the unspecified signal mask in the documentation, and
311     that this is a race condition regardless of EV_SIGNALFD.
312 root 1.142 - backport inotify code to C89.
313 root 1.148 - inotify file descriptors could leak into child processes.
314 sf-exg 1.241 - ev_stat watchers could keep an erroneous extra ref on the loop,
315 root 1.151 preventing exit when unregistering all watchers (testcases
316 root 1.150 provided by ry@tinyclouds.org).
317 root 1.143 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
318 root 1.145 symbols to make it easier for apps to do their own fd management.
319 root 1.144 - support EV_IDLE_ENABLE being disabled in ev++.h
320     (patch by Didier Spezia).
321 root 1.147 - take advantage of inotify_init1, if available, to set cloexec/nonblock
322     on fd creation, to avoid races.
323 root 1.150 - the signal handling pipe wasn't always initialised under windows
324     (analysed by lekma).
325 root 1.146 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
326     signalfd.
327 root 1.152 - add missing string.h include (Denis F. Latypoff).
328 root 1.153 - only replace ev_stat.prev when we detect an actual difference,
329     so prev is (almost) always different to attr. this might
330 sf-exg 1.191 have caused the problems with 04_stat.t.
331 root 1.154 - add ev::timer->remaining () method to C++ API.
332 root 1.142
333 root 1.141 3.8 Sun Aug 9 14:30:45 CEST 2009
334 root 1.133 - incompatible change: do not necessarily reset signal handler
335     to SIG_DFL when a sighandler is stopped.
336 root 1.135 - ev_default_destroy did not properly free or zero some members,
337 sf-exg 1.191 potentially causing crashes and memory corruption on repeated
338 root 1.134 ev_default_destroy/ev_default_loop calls.
339 root 1.133 - take advantage of signalfd on GNU/Linux systems.
340     - document that the signal mask might be in an unspecified
341     state when using libev's signal handling.
342 root 1.136 - take advantage of some GNU/Linux calls to set cloexec/nonblock
343     on fd creation, to avoid race conditions.
344 root 1.132
345 root 1.131 3.7 Fri Jul 17 16:36:32 CEST 2009
346 root 1.128 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
347     instead of using a per-loop variable (bug caught by accident...).
348     - the ev_set_io_collect_interval interpretation has changed.
349     - add new functionality: ev_set_userdata, ev_userdata,
350 root 1.126 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
351 root 1.132 ev_invoke_pending, ev_pending_count, together with a long example
352     about thread locking.
353 root 1.128 - add ev_timer_remaining (as requested by Denis F. Latypoff).
354     - add ev_loop_depth.
355 root 1.124 - calling ev_unloop in fork/prepare watchers will no longer poll
356     for new events.
357 root 1.115 - Denis F. Latypoff corrected many typos in example code snippets.
358     - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
359     check that the syscall number is available before trying to
360     use it (reported by ry@tinyclouds).
361 root 1.117 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
362 root 1.116 slightly higher accuracy.
363 root 1.122 - properly declare ev_loop_verify and ev_now_update even when
364     !EV_MULTIPLICITY.
365 root 1.121 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
366 root 1.123 - support EV_MINIMAL==2 for a reduced API.
367 root 1.125 - actually 0-initialise struct sigaction when installing signals.
368 root 1.127 - add section on hibernate and stopped processes to ev_timer docs.
369 root 1.115
370 root 1.113 3.6 Tue Apr 28 02:49:30 CEST 2009
371 root 1.107 - multiple timers becoming ready within an event loop iteration
372     will be invoked in the "correct" order now.
373 root 1.105 - do not leave the event loop early just because we have no active
374     watchers, fixing a problem when embedding a kqueue loop
375     that has active kernel events but no registered watchers
376     (reported by blacksand blacksand).
377 root 1.102 - correctly zero the idx values for arrays, so destroying and
378     reinitialising the default loop actually works (patch by
379     Malek Hadj-Ali).
380 root 1.108 - implement ev_suspend and ev_resume.
381 root 1.106 - new EV_CUSTOM revents flag for use by applications.
382 sf-exg 1.241 - add documentation section about priorities.
383 sf-exg 1.286 - add a glossary to the documentation.
384 root 1.111 - extend the ev_fork description slightly.
385 root 1.112 - optimize a jump out of call_pending.
386 root 1.102
387 root 1.101 3.53 Sun Feb 15 02:38:20 CET 2009
388     - fix a bug in event pipe creation on win32 that would cause a
389     failed assertion on event loop creation (patch by Malek Hadj-Ali).
390 root 1.100 - probe for CLOCK_REALTIME support at runtime as well and fall
391     back to gettimeofday if there is an error, to support older
392     operating systems with newer header files/libraries.
393     - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
394     (default most everywhere), otherwise not.
395    
396 root 1.99 3.52 Wed Jan 7 21:43:02 CET 2009
397 root 1.97 - fix compilation of select backend in fd_set mode when NFDBITS is
398     missing (to get it to compile on QNX, reported by Rodrigo Campos).
399     - better select-nfds handling when select backend is in fd_set mode.
400     - diagnose fd_set overruns when select backend is in fd_set mode.
401     - due to a thinko, instead of disabling everything but
402     select on the borked OS X platform, everything but select was
403     allowed (reported by Emanuele Giaquinta).
404 root 1.95 - actually verify that local and remote port are matching in
405     libev's socketpair emulation, which makes denial-of-service
406     attacks harder (but not impossible - it's windows). Make sure
407 root 1.96 it even works under vista, which thinks that getpeer/sockname
408     should return fantasy port numbers.
409 root 1.100 - include "libev" in all assertion messages for potentially
410 root 1.97 clearer diagnostics.
411 root 1.98 - event_get_version (libevent compatibility) returned
412     a useless string instead of the expected version string
413     (patch by W.C.A. Wijngaards).
414 root 1.95
415 root 1.94 3.51 Wed Dec 24 23:00:11 CET 2008
416 root 1.91 - fix a bug where an inotify watcher was added twice, causing
417 root 1.92 freezes on hash collisions (reported and analysed by Graham Leggett).
418 root 1.87 - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
419     a direct syscall - slower, but no dependency on librt et al.
420 root 1.88 - assume negative return values != -1 signals success of port_getn
421     (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
422     (no known failure reports, but it doesn't hurt).
423 root 1.93 - fork detection in ev_embed now stops and restarts the watcher
424     automatically.
425 root 1.89 - EXPERIMENTAL: default the method to operator () in ev++.h,
426     to make it nicer to use functors (requested by Benedek László).
427     - fixed const object callbacks in ev++.h.
428 root 1.90 - replaced loop_ref argument of watcher.set (loop) by a direct
429     ev_loop * in ev++.h, to avoid clashes with functor patch.
430 root 1.91 - do not try to watch the empty string via inotify.
431 root 1.92 - inotify watchers could be leaked under certain circumstances.
432     - OS X 10.5 is actually even more broken than earlier versions,
433     so fall back to select on that piece of garbage.
434 root 1.93 - fixed some weirdness in the ev_embed documentation.
435 root 1.87
436 root 1.86 3.49 Wed Nov 19 11:26:53 CET 2008
437 root 1.83 - ev_stat watchers will now use inotify as a mere hint on
438     kernels <2.6.25, or if the filesystem is not in the
439     "known to be good" list.
440 root 1.84 - better mingw32 compatibility (it's not as borked as native win32)
441     (analysed by Roger Pack).
442 root 1.85 - include stdio.h in the example program, as too many people are
443     confused by the weird C language otherwise. I guess the next thing
444     I get told is that the "..." ellipses in the examples don't compile
445     with their C compiler.
446 root 1.83
447 root 1.80 3.48 Thu Oct 30 09:02:37 CET 2008
448 root 1.71 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
449     backend by assuming the kernel event mask hasn't changed if
450     ADD fails with EEXIST.
451 root 1.75 - work around spurious event notification bugs in epoll by using
452 root 1.77 a 32-bit generation counter. recreate kernel state if we receive
453 root 1.78 spurious notifications or unwanted events. this is very costly,
454     but I didn't come up with this horrible design.
455 root 1.71 - use memset to initialise most arrays now and do away with the
456     init functions.
457 root 1.72 - expand time-out strategies into a "Be smart about timeouts" section.
458     - drop the "struct" from all ev_watcher declarations in the
459 root 1.73 documentation and did other clarifications (yeah, it was a mistake
460     to have a struct AND a function called ev_loop).
461 root 1.74 - fix a bug where ev_default would not initialise the default
462     loop again after it was destroyed with ev_default_destroy.
463 root 1.79 - rename syserr to ev_syserr to avoid name clashes when embedding,
464     do similar changes for event.c.
465 root 1.71
466 root 1.69 3.45 Tue Oct 21 21:59:26 CEST 2008
467 root 1.67 - disable inotify usage on linux <2.6.25, as it is broken
468     (reported by Yoann Vandoorselaere).
469 sf-exg 1.191 - ev_stat erroneously would try to add inotify watchers
470 root 1.68 even when inotify wasn't available (this should only
471 root 1.67 have a performance impact).
472 root 1.65 - ev_once now passes both timeout and io to the callback if both
473     occur concurrently, instead of giving timeouts precedence.
474 root 1.66 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
475 root 1.65
476 root 1.62 3.44 Mon Sep 29 05:18:39 CEST 2008
477     - embed watchers now automatically invoke ev_loop_fork on the
478     embedded loop when the parent loop forks.
479 root 1.58 - new function: ev_now_update (loop).
480 root 1.57 - verify_watcher was not marked static.
481 root 1.59 - improve the "associating..." manpage section.
482 root 1.60 - documentation tweaks here and there.
483 root 1.57
484 root 1.56 3.43 Sun Jul 6 05:34:41 CEST 2008
485 root 1.54 - include more include files on windows to get struct _stati64
486 root 1.56 (reported by Chris Hulbert, but doesn't quite fix his issue).
487 root 1.53 - add missing #include <io.h> in ev.c on windows (reported by
488     Matt Tolton).
489    
490 root 1.52 3.42 Tue Jun 17 12:12:07 CEST 2008
491 root 1.50 - work around yet another windows bug: FD_SET actually adds fd's
492     multiple times to the fd_*SET*, despite official MSN docs claiming
493 root 1.51 otherwise. Reported and well-analysed by Matt Tolton.
494     - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
495 root 1.48 (reported any analysed by Chris Hulbert).
496 root 1.49 - fix a bug in ev_ebadf (this function is only used to catch
497     programming errors in the libev user). reported by Matt Tolton.
498     - fix a bug in fd_intern on win32 (could lead to compile errors
499     under some circumstances, but would work correctly if it compiles).
500     reported by Matt Tolton.
501 root 1.50 - (try to) work around missing lstat on windows.
502 root 1.45 - pass in the write fd set as except fd set under windows. windows
503 root 1.46 is so uncontrollably lame that it requires this. this means that
504     switching off oobinline is not supported (but tcp/ip doesn't
505     have oob, so that would be stupid anyways.
506 root 1.47 - use posix module symbol to auto-detect monotonic clock presence
507     and some other default values.
508 root 1.45
509 root 1.44 3.41 Fri May 23 18:42:54 CEST 2008
510 root 1.46 - work around an obscure bug in winsocket select: if you
511 root 1.40 provide only empty fd sets then select returns WSAEINVAL. how sucky.
512 root 1.41 - improve timer scheduling stability and reduce use of time_epsilon.
513 root 1.36 - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
514     codesize and makes for better cache-efficiency.
515     - use 3-based 4-heap for !EV_MINIMAL. this makes better use
516     of cpu cache lines and gives better growth behaviour than
517     2-based heaps.
518 root 1.38 - cache timestamp within heap for !EV_MINIMAL, to avoid random
519     memory accesses.
520     - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
521 root 1.33 - fix a potential aliasing issue in ev_timer_again.
522 root 1.35 - add/document ev_periodic_at, retract direct access to ->at.
523     - improve ev_stat docs.
524     - add portability requirements section.
525 root 1.39 - fix manpage headers etc.
526 root 1.40 - normalise WSA error codes to lower range on windows.
527 root 1.43 - add consistency check code that can be called automatically
528     or on demand to check for internal structures (ev_loop_verify).
529 root 1.31
530 root 1.30 3.31 Wed Apr 16 20:45:04 CEST 2008
531     - added last minute fix for ev_poll.c by Brandon Black.
532 root 1.29
533 root 1.28 3.3 Wed Apr 16 19:04:10 CEST 2008
534 root 1.23 - event_base_loopexit should return 0 on success
535     (W.C.A. Wijngaards).
536 root 1.20 - added linux eventfd support.
537     - try to autodetect epoll and inotify support
538     by libc header version if not using autoconf.
539 root 1.21 - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
540     - declare functions defined in ev.h as inline if
541     C99 or gcc are available.
542     - enable inlining with gcc versions 2 and 3.
543 root 1.25 - work around broken poll implementations potentially
544     not clearing revents field in ev_poll (Brandon Black)
545     (no such systems are known at this time).
546 root 1.23 - work around a bug in realloc on openbsd and darwin,
547 sf-exg 1.191 also makes the erroneous valgrind complaints
548 root 1.23 go away (noted by various people).
549 root 1.26 - fix ev_async_pending, add c++ wrapper for ev_async
550 sf-exg 1.191 (based on patch sent by Johannes Deisenhofer).
551 root 1.26 - add sensible set method to ev::embed.
552 root 1.27 - made integer constants type int in ev.h.
553 root 1.20
554 root 1.19 3.2 Wed Apr 2 17:11:19 CEST 2008
555 root 1.15 - fix a 64 bit overflow issue in the select backend,
556     by using fd_mask instead of int for the mask.
557 root 1.16 - rename internal sighandler to avoid clash with very old perls.
558 root 1.18 - entering ev_loop will not clear the ONESHOT or NONBLOCKING
559     flags of any outer loops anymore.
560 root 1.17 - add ev_async_pending.
561 root 1.15
562 root 1.14 3.1 Thu Mar 13 13:45:22 CET 2008
563 root 1.12 - implement ev_async watchers.
564 root 1.10 - only initialise signal pipe on demand.
565     - make use of sig_atomic_t configurable.
566 root 1.14 - improved documentation.
567 root 1.10
568 root 1.9 3.0 Mon Jan 28 13:14:47 CET 2008
569 root 1.6 - API/ABI bump to version 3.0.
570 root 1.4 - ev++.h includes "ev.h" by default now, not <ev.h>.
571     - slightly improved documentation.
572 root 1.5 - speed up signal detection after a fork.
573 root 1.6 - only optionally return trace status changed in ev_child
574     watchers.
575 root 1.8 - experimental (and undocumented) loop wrappers for ev++.h.
576 root 1.4
577 root 1.2 2.01 Tue Dec 25 08:04:41 CET 2007
578 root 1.3 - separate Changes file.
579 root 1.2 - fix ev_path_set => ev_stat_set typo.
580     - remove event_compat.h from the libev tarball.
581     - change how include files are found.
582     - doc updates.
583     - update licenses, explicitly allow for GPL relicensing.
584    
585     2.0 Sat Dec 22 17:47:03 CET 2007
586     - new ev_sleep, ev_set_(io|timeout)_collect_interval.
587     - removed epoll from embeddable fd set.
588     - fix embed watchers.
589     - renamed ev_embed.loop to other.
590     - added exported Symbol tables.
591     - undefine member wrapper macros at the end of ev.c.
592     - respect EV_H in ev++.h.
593    
594     1.86 Tue Dec 18 02:36:57 CET 2007
595     - fix memleak on loop destroy (not relevant for perl).
596    
597     1.85 Fri Dec 14 20:32:40 CET 2007
598     - fix some aliasing issues w.r.t. timers and periodics
599     (not relevant for perl).
600    
601     (for historic versions refer to EV/Changes, found in the Perl interface)
602    
603 root 1.1 0.1 Wed Oct 31 21:31:48 CET 2007
604     - original version; hacked together in <24h.
605