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Revision: 1.370
Committed: Sat Jun 3 08:53:03 2023 UTC (11 months, 2 weeks ago) by root
Branch: MAIN
CVS Tags: HEAD
Changes since 1.369: +1 -0 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 Revision history for libev, a high-performance and full-featured event loop.
2
3 TODO: for next ABI/API change, consider moving EV__IOFDSSET into io->fd instead and provide a getter.
4 TODO: document EV_TSTAMP_T
5 TODO: https://paste.debian.net/1268417/, stdfun
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
12 4.33 Wed Mar 18 13:22:29 CET 2020
13 - no changes w.r.t. 4.32.
14
15 4.32 (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
38 4.31 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
46 4.30 (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
52 4.29 (EV only)
53 - add io uring autoconf and non-autoconf detection.
54 - disable io_uring when some header files are too old.
55
56 4.28 (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
77 4.27 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
88 4.26 (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
97 4.25 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
113 4.24 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
118 4.23 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
123 4.22 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
133 4.20 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
139 4.19 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
147 4.18 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
162 4.15 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
209 4.11 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 :)
221 - change the default periodic reschedule function to hopefully be more
222 exact and correct even in corner cases or in the far future.
223 - do not rely on -lm anymore: use it when available but use our
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.
237
238 4.04 Wed Feb 16 09:01:51 CET 2011
239 - fix two problems in the native win32 backend, where reuse of fd's
240 with different underlying handles caused handles not to be removed
241 or added to the select set (analyzed and tested by Bert Belder).
242 - do no rely on ceil() in ev_e?poll.c.
243 - backport libev to HP-UX versions before 11 v3.
244 - configure did not detect nanosleep and clock_gettime properly when
245 they are available in the libc (as opposed to -lrt).
246
247 4.03 Tue Jan 11 14:37:25 CET 2011
248 - officially support polling files with all backends.
249 - support files, /dev/zero etc. the same way as select in the epoll
250 backend, by generating events on our own.
251 - ports backend: work around solaris bug 6874410 and many related ones
252 (EINTR, maybe more), with no performance loss (note that the solaris
253 bug report is actually wrong, reality is far more bizarre and broken
254 than that).
255 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
256 #ifdef to test for them.
257 - new (experimental) function: ev_feed_signal.
258 - new (to become default) EVFLAG_NOSIGMASK flag.
259 - new EVBACKEND_MASK symbol.
260 - updated COMMON IDIOMS SECTION.
261
262 4.01 Fri Nov 5 21:51:29 CET 2010
263 - automake fucked it up, apparently, --add-missing -f is not quite enough
264 to make it update its files, so 4.00 didn't install ev++.h and
265 event.h on make install. grrr.
266 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
267 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
268 - use "(libev) " prefix for all libev error messages now.
269
270 4.00 Mon Oct 25 12:32:12 CEST 2010
271 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
272 - ev_embed_stop did not correctly stop the watcher (very good
273 testcase by Vladimir Timofeev).
274 - ev_run will now always update the current loop time - it erroneously
275 didn't when idle watchers were active, causing timers not to fire.
276 - fix a bug where a timeout of zero caused the timer not to fire
277 in the libevent emulation (testcase by Péter Szabó).
278 - applied win32 fixes by Michael Lenaghan (also James Mansion).
279 - replace EV_MINIMAL by EV_FEATURES.
280 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
281 seems the former is *much* faster than the latter.
282 - linux kernel version detection (for inotify bug workarounds)
283 did not work properly.
284 - reduce the number of spurious wake-ups with the ports backend.
285 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
286 - do async init within ev_async_start, not ev_async_set, which avoids
287 an API quirk where the set function must be called in the C++ API
288 even when there is nothing to set.
289 - add (undocumented) EV_ENABLE when adding events with kqueue,
290 this might help with OS X, which seems to need it despite documenting
291 not to need it (helpfully pointed out by Tilghman Lesher).
292 - do not use poll by default on freebsd, it's broken (what isn't
293 on freebsd...).
294 - allow to embed epoll on kernels >= 2.6.32.
295 - configure now prepends -O3, not appends it, so one can still
296 override it.
297 - ev.pod: greatly expanded the portability section, added a porting
298 section, a description of watcher states and made lots of minor fixes.
299 - disable poll backend on AIX, the poll header spams the namespace
300 and it's not worth working around dead platforms (reported
301 and analyzed by Aivars Kalvans).
302 - improve header file compatibility of the standalone eventfd code
303 in an obscure case.
304 - implement EV_AVOID_STDIO option.
305 - do not use sscanf to parse linux version number (smaller, faster,
306 no sscanf dependency).
307 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
308 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
309 - add section on accept() problems to the manpage.
310 - rename EV_TIMEOUT to EV_TIMER.
311 - rename ev_loop_count/depth/verify/loop/unloop.
312 - remove ev_default_destroy and ev_default_fork.
313 - switch to two-digit minor version.
314 - work around an apparent gentoo compiler bug.
315 - define _DARWIN_UNLIMITED_SELECT. just so.
316 - use enum instead of #define for most constants.
317 - improve compatibility to older C++ compilers.
318 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
319 default arguments when compiled as C++.
320 - enable automake dependency tracking.
321 - ev_loop_new no longer leaks memory when loop creation failed.
322 - new ev_cleanup watcher type.
323
324 3.9 Thu Dec 31 07:59:59 CET 2009
325 - signalfd is no longer used by default and has to be requested
326 explicitly - this means that easy to catch bugs become hard to
327 catch race conditions, but the users have spoken.
328 - point out the unspecified signal mask in the documentation, and
329 that this is a race condition regardless of EV_SIGNALFD.
330 - backport inotify code to C89.
331 - inotify file descriptors could leak into child processes.
332 - ev_stat watchers could keep an erroneous extra ref on the loop,
333 preventing exit when unregistering all watchers (testcases
334 provided by ry@tinyclouds.org).
335 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
336 symbols to make it easier for apps to do their own fd management.
337 - support EV_IDLE_ENABLE being disabled in ev++.h
338 (patch by Didier Spezia).
339 - take advantage of inotify_init1, if available, to set cloexec/nonblock
340 on fd creation, to avoid races.
341 - the signal handling pipe wasn't always initialised under windows
342 (analysed by lekma).
343 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
344 signalfd.
345 - add missing string.h include (Denis F. Latypoff).
346 - only replace ev_stat.prev when we detect an actual difference,
347 so prev is (almost) always different to attr. this might
348 have caused the problems with 04_stat.t.
349 - add ev::timer->remaining () method to C++ API.
350
351 3.8 Sun Aug 9 14:30:45 CEST 2009
352 - incompatible change: do not necessarily reset signal handler
353 to SIG_DFL when a sighandler is stopped.
354 - ev_default_destroy did not properly free or zero some members,
355 potentially causing crashes and memory corruption on repeated
356 ev_default_destroy/ev_default_loop calls.
357 - take advantage of signalfd on GNU/Linux systems.
358 - document that the signal mask might be in an unspecified
359 state when using libev's signal handling.
360 - take advantage of some GNU/Linux calls to set cloexec/nonblock
361 on fd creation, to avoid race conditions.
362
363 3.7 Fri Jul 17 16:36:32 CEST 2009
364 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
365 instead of using a per-loop variable (bug caught by accident...).
366 - the ev_set_io_collect_interval interpretation has changed.
367 - add new functionality: ev_set_userdata, ev_userdata,
368 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
369 ev_invoke_pending, ev_pending_count, together with a long example
370 about thread locking.
371 - add ev_timer_remaining (as requested by Denis F. Latypoff).
372 - add ev_loop_depth.
373 - calling ev_unloop in fork/prepare watchers will no longer poll
374 for new events.
375 - Denis F. Latypoff corrected many typos in example code snippets.
376 - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
377 check that the syscall number is available before trying to
378 use it (reported by ry@tinyclouds).
379 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
380 slightly higher accuracy.
381 - properly declare ev_loop_verify and ev_now_update even when
382 !EV_MULTIPLICITY.
383 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
384 - support EV_MINIMAL==2 for a reduced API.
385 - actually 0-initialise struct sigaction when installing signals.
386 - add section on hibernate and stopped processes to ev_timer docs.
387
388 3.6 Tue Apr 28 02:49:30 CEST 2009
389 - multiple timers becoming ready within an event loop iteration
390 will be invoked in the "correct" order now.
391 - do not leave the event loop early just because we have no active
392 watchers, fixing a problem when embedding a kqueue loop
393 that has active kernel events but no registered watchers
394 (reported by blacksand blacksand).
395 - correctly zero the idx values for arrays, so destroying and
396 reinitialising the default loop actually works (patch by
397 Malek Hadj-Ali).
398 - implement ev_suspend and ev_resume.
399 - new EV_CUSTOM revents flag for use by applications.
400 - add documentation section about priorities.
401 - add a glossary to the documentation.
402 - extend the ev_fork description slightly.
403 - optimize a jump out of call_pending.
404
405 3.53 Sun Feb 15 02:38:20 CET 2009
406 - fix a bug in event pipe creation on win32 that would cause a
407 failed assertion on event loop creation (patch by Malek Hadj-Ali).
408 - probe for CLOCK_REALTIME support at runtime as well and fall
409 back to gettimeofday if there is an error, to support older
410 operating systems with newer header files/libraries.
411 - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
412 (default most everywhere), otherwise not.
413
414 3.52 Wed Jan 7 21:43:02 CET 2009
415 - fix compilation of select backend in fd_set mode when NFDBITS is
416 missing (to get it to compile on QNX, reported by Rodrigo Campos).
417 - better select-nfds handling when select backend is in fd_set mode.
418 - diagnose fd_set overruns when select backend is in fd_set mode.
419 - due to a thinko, instead of disabling everything but
420 select on the borked OS X platform, everything but select was
421 allowed (reported by Emanuele Giaquinta).
422 - actually verify that local and remote port are matching in
423 libev's socketpair emulation, which makes denial-of-service
424 attacks harder (but not impossible - it's windows). Make sure
425 it even works under vista, which thinks that getpeer/sockname
426 should return fantasy port numbers.
427 - include "libev" in all assertion messages for potentially
428 clearer diagnostics.
429 - event_get_version (libevent compatibility) returned
430 a useless string instead of the expected version string
431 (patch by W.C.A. Wijngaards).
432
433 3.51 Wed Dec 24 23:00:11 CET 2008
434 - fix a bug where an inotify watcher was added twice, causing
435 freezes on hash collisions (reported and analysed by Graham Leggett).
436 - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
437 a direct syscall - slower, but no dependency on librt et al.
438 - assume negative return values != -1 signals success of port_getn
439 (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
440 (no known failure reports, but it doesn't hurt).
441 - fork detection in ev_embed now stops and restarts the watcher
442 automatically.
443 - EXPERIMENTAL: default the method to operator () in ev++.h,
444 to make it nicer to use functors (requested by Benedek László).
445 - fixed const object callbacks in ev++.h.
446 - replaced loop_ref argument of watcher.set (loop) by a direct
447 ev_loop * in ev++.h, to avoid clashes with functor patch.
448 - do not try to watch the empty string via inotify.
449 - inotify watchers could be leaked under certain circumstances.
450 - OS X 10.5 is actually even more broken than earlier versions,
451 so fall back to select on that piece of garbage.
452 - fixed some weirdness in the ev_embed documentation.
453
454 3.49 Wed Nov 19 11:26:53 CET 2008
455 - ev_stat watchers will now use inotify as a mere hint on
456 kernels <2.6.25, or if the filesystem is not in the
457 "known to be good" list.
458 - better mingw32 compatibility (it's not as borked as native win32)
459 (analysed by Roger Pack).
460 - include stdio.h in the example program, as too many people are
461 confused by the weird C language otherwise. I guess the next thing
462 I get told is that the "..." ellipses in the examples don't compile
463 with their C compiler.
464
465 3.48 Thu Oct 30 09:02:37 CET 2008
466 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
467 backend by assuming the kernel event mask hasn't changed if
468 ADD fails with EEXIST.
469 - work around spurious event notification bugs in epoll by using
470 a 32-bit generation counter. recreate kernel state if we receive
471 spurious notifications or unwanted events. this is very costly,
472 but I didn't come up with this horrible design.
473 - use memset to initialise most arrays now and do away with the
474 init functions.
475 - expand time-out strategies into a "Be smart about timeouts" section.
476 - drop the "struct" from all ev_watcher declarations in the
477 documentation and did other clarifications (yeah, it was a mistake
478 to have a struct AND a function called ev_loop).
479 - fix a bug where ev_default would not initialise the default
480 loop again after it was destroyed with ev_default_destroy.
481 - rename syserr to ev_syserr to avoid name clashes when embedding,
482 do similar changes for event.c.
483
484 3.45 Tue Oct 21 21:59:26 CEST 2008
485 - disable inotify usage on linux <2.6.25, as it is broken
486 (reported by Yoann Vandoorselaere).
487 - ev_stat erroneously would try to add inotify watchers
488 even when inotify wasn't available (this should only
489 have a performance impact).
490 - ev_once now passes both timeout and io to the callback if both
491 occur concurrently, instead of giving timeouts precedence.
492 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
493
494 3.44 Mon Sep 29 05:18:39 CEST 2008
495 - embed watchers now automatically invoke ev_loop_fork on the
496 embedded loop when the parent loop forks.
497 - new function: ev_now_update (loop).
498 - verify_watcher was not marked static.
499 - improve the "associating..." manpage section.
500 - documentation tweaks here and there.
501
502 3.43 Sun Jul 6 05:34:41 CEST 2008
503 - include more include files on windows to get struct _stati64
504 (reported by Chris Hulbert, but doesn't quite fix his issue).
505 - add missing #include <io.h> in ev.c on windows (reported by
506 Matt Tolton).
507
508 3.42 Tue Jun 17 12:12:07 CEST 2008
509 - work around yet another windows bug: FD_SET actually adds fd's
510 multiple times to the fd_*SET*, despite official MSN docs claiming
511 otherwise. Reported and well-analysed by Matt Tolton.
512 - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
513 (reported any analysed by Chris Hulbert).
514 - fix a bug in ev_ebadf (this function is only used to catch
515 programming errors in the libev user). reported by Matt Tolton.
516 - fix a bug in fd_intern on win32 (could lead to compile errors
517 under some circumstances, but would work correctly if it compiles).
518 reported by Matt Tolton.
519 - (try to) work around missing lstat on windows.
520 - pass in the write fd set as except fd set under windows. windows
521 is so uncontrollably lame that it requires this. this means that
522 switching off oobinline is not supported (but tcp/ip doesn't
523 have oob, so that would be stupid anyways.
524 - use posix module symbol to auto-detect monotonic clock presence
525 and some other default values.
526
527 3.41 Fri May 23 18:42:54 CEST 2008
528 - work around an obscure bug in winsocket select: if you
529 provide only empty fd sets then select returns WSAEINVAL. how sucky.
530 - improve timer scheduling stability and reduce use of time_epsilon.
531 - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
532 codesize and makes for better cache-efficiency.
533 - use 3-based 4-heap for !EV_MINIMAL. this makes better use
534 of cpu cache lines and gives better growth behaviour than
535 2-based heaps.
536 - cache timestamp within heap for !EV_MINIMAL, to avoid random
537 memory accesses.
538 - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
539 - fix a potential aliasing issue in ev_timer_again.
540 - add/document ev_periodic_at, retract direct access to ->at.
541 - improve ev_stat docs.
542 - add portability requirements section.
543 - fix manpage headers etc.
544 - normalise WSA error codes to lower range on windows.
545 - add consistency check code that can be called automatically
546 or on demand to check for internal structures (ev_loop_verify).
547
548 3.31 Wed Apr 16 20:45:04 CEST 2008
549 - added last minute fix for ev_poll.c by Brandon Black.
550
551 3.3 Wed Apr 16 19:04:10 CEST 2008
552 - event_base_loopexit should return 0 on success
553 (W.C.A. Wijngaards).
554 - added linux eventfd support.
555 - try to autodetect epoll and inotify support
556 by libc header version if not using autoconf.
557 - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
558 - declare functions defined in ev.h as inline if
559 C99 or gcc are available.
560 - enable inlining with gcc versions 2 and 3.
561 - work around broken poll implementations potentially
562 not clearing revents field in ev_poll (Brandon Black)
563 (no such systems are known at this time).
564 - work around a bug in realloc on openbsd and darwin,
565 also makes the erroneous valgrind complaints
566 go away (noted by various people).
567 - fix ev_async_pending, add c++ wrapper for ev_async
568 (based on patch sent by Johannes Deisenhofer).
569 - add sensible set method to ev::embed.
570 - made integer constants type int in ev.h.
571
572 3.2 Wed Apr 2 17:11:19 CEST 2008
573 - fix a 64 bit overflow issue in the select backend,
574 by using fd_mask instead of int for the mask.
575 - rename internal sighandler to avoid clash with very old perls.
576 - entering ev_loop will not clear the ONESHOT or NONBLOCKING
577 flags of any outer loops anymore.
578 - add ev_async_pending.
579
580 3.1 Thu Mar 13 13:45:22 CET 2008
581 - implement ev_async watchers.
582 - only initialise signal pipe on demand.
583 - make use of sig_atomic_t configurable.
584 - improved documentation.
585
586 3.0 Mon Jan 28 13:14:47 CET 2008
587 - API/ABI bump to version 3.0.
588 - ev++.h includes "ev.h" by default now, not <ev.h>.
589 - slightly improved documentation.
590 - speed up signal detection after a fork.
591 - only optionally return trace status changed in ev_child
592 watchers.
593 - experimental (and undocumented) loop wrappers for ev++.h.
594
595 2.01 Tue Dec 25 08:04:41 CET 2007
596 - separate Changes file.
597 - fix ev_path_set => ev_stat_set typo.
598 - remove event_compat.h from the libev tarball.
599 - change how include files are found.
600 - doc updates.
601 - update licenses, explicitly allow for GPL relicensing.
602
603 2.0 Sat Dec 22 17:47:03 CET 2007
604 - new ev_sleep, ev_set_(io|timeout)_collect_interval.
605 - removed epoll from embeddable fd set.
606 - fix embed watchers.
607 - renamed ev_embed.loop to other.
608 - added exported Symbol tables.
609 - undefine member wrapper macros at the end of ev.c.
610 - respect EV_H in ev++.h.
611
612 1.86 Tue Dec 18 02:36:57 CET 2007
613 - fix memleak on loop destroy (not relevant for perl).
614
615 1.85 Fri Dec 14 20:32:40 CET 2007
616 - fix some aliasing issues w.r.t. timers and periodics
617 (not relevant for perl).
618
619 (for historic versions refer to EV/Changes, found in the Perl interface)
620
621 0.1 Wed Oct 31 21:31:48 CET 2007
622 - original version; hacked together in <24h.
623