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Comparing libev/Changes (file contents):
Revision 1.99 by root, Wed Jan 7 20:45:52 2009 UTC vs.
Revision 1.309 by root, Sun Dec 20 01:35:55 2015 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
3TODO: ev_loop_wakeup
4TODO: EV_STANDALONE == NO_HASSEL (do not use clock_gettime in ev_standalone)
5TODO: faq, process a thing in each iteration
6TODO: dbeugging tips, ev_verify, ev_init twice
7TODO: ev_break for immediate exit (EVBREAK_NOW?)
8TODO: ev_feed_child_event
9TODO: document the special problem of signals around fork.
10TODO: store pid for each signal
11TODO: document file descriptor usage per loop
12TODO: store loop pid_t and compare isndie signal handler,store 1 for same, 2 for differign pid, clean up in loop_fork
13TODO: embed watchers need updating when fd changes
14TODO: document portability requirements for atomic pointer access
15TODO: document requirements for function pointers and calling conventions.
16
174.22
18 - when epoll detects unremovable fds in the fd set, rebuild
19 only the epoll descriptor, not the signal pipe, to avoid
20 SIGPIPE in ev_async_send. This doesn't solve it on fork,
21 so document what needs to be done in ev_loop_fork
22 (analyzed by Benjamin Mahler).
23 - remove superfluous sys/timeb.h include on win32
24 (analyzed by Jason Madden).
25 - updated libecb.
26
274.20 Sat Jun 20 13:01:43 CEST 2015
28 - prefer noexcept over throw () with C++ 11.
29 - update ecb.h due to incompatibilities with c11.
30 - fix a potential aliasing issue when reading and writing
31 watcher callbacks.
32
334.19 Thu Sep 25 08:18:25 CEST 2014
34 - ev.h wasn't valid C++ anymore, which tripped compilers other than
35 clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately,
36 C++ doesn't support typedefs for function pointers fully, so the affected
37 declarations have to spell out the types each time.
38 - when not using autoconf, tighten the check for clock_gettime and related
39 functionality.
40
414.18 Fri Sep 5 17:55:26 CEST 2014
42 - events on files were not always generated properly with the
43 epoll backend (testcase by Assaf Inbal).
44 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
45 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
46 - use a reasonable fallback for EV_NSIG instead of erroring out
47 when we can't detect the signal set size.
48 - in the absence of autoconf, do not use the clock syscall
49 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
50 doing clock_gettime in userspace).
51 - ensure extern "C" function pointers are used for externally-visible
52 loop callbacks (not watcher callbacks yet).
53 - (ecb) work around memory barriers and volatile apparently both being
54 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
55
564.15 Fri Mar 1 12:04:50 CET 2013
57 - destroying a non-default loop would stop the global waitpid
58 watcher (Denis Bilenko).
59 - queueing pending watchers of higher priority from a watcher now invokes
60 them in a timely fashion (reported by Denis Bilenko).
61 - add throw() to all libev functions that cannot throw exceptions, for
62 further code size decrease when compiling for C++.
63 - add throw () to callbacks that must not throw exceptions (allocator,
64 syserr, loop acquire/release, periodic reschedule cbs).
65 - fix event_base_loop return code, add event_get_callback, event_base_new,
66 event_base_get_method calls to improve libevent 1.x emulation and add
67 some libevent 2.x functionality (based on a patch by Jeff Davey).
68 - add more memory fences to fix a bug reported by Jeff Davey. Better
69 be overfenced than underprotected.
70 - ev_run now returns a boolean status (true meaning watchers are
71 still active).
72 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
73 libev's EV_ERROR (reported by 191919).
74 - (ecb) add memory fence support for xlC (Darin McBride).
75 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
76 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
77 - work around some kernels losing file descriptors by leaking
78 the kqueue descriptor in the child.
79 - work around linux inotify not reporting IN_ATTRIB changes for directories
80 in many cases.
81 - include sys/syscall.h instead of plain syscall.h.
82 - check for io watcher loops in ev_verify, check for the most
83 common reported usage bug in ev_io_start.
84 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
85 - always use WSASend/WSARecv directly on windows, hoping that this
86 works in all cases (unlike read/write/send/recv...).
87 - try to detect signals around a fork faster (test program by
88 Denis Bilenko).
89 - work around recent glibc versions that leak memory in realloc.
90 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
91 the watcher base set (loop) method.
92 - rewrite the async/signal pipe logic to always keep a valid fd, which
93 simplifies (and hopefully correctifies :) the race checking
94 on fork, at the cost of one extra fd.
95 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
96 inotify-supporting filesystems.
97 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
98 versions ignore it before
99 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
100 - add some untested android support.
101 - enum expressions must be of type int (reported by Juan Pablo L).
102
1034.11 Sat Feb 4 19:52:39 CET 2012
104 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
105 was documented already, but not implemented in the repeating case.
106 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
107 - fix a race where the workaround against the epoll fork bugs
108 caused signals to not be handled anymore.
109 - correct backend_fudge for most backends, and implement a windows
110 specific workaround to avoid looping because we call both
111 select and Sleep, both with different time resolutions.
112 - document range and guarantees of ev_sleep.
113 - document reasonable ranges for periodics interval and offset.
114 - rename backend_fudge to backend_mintime to avoid future confusion :)
115 - change the default periodic reschedule function to hopefully be more
116 exact and correct even in corner cases or in the far future.
117 - do not rely on -lm anymore: use it when available but use our
118 own floor () if it is missing. This should make it easier to embed,
119 as no external libraries are required.
120 - strategically import macros from libecb and mark rarely-used functions
121 as cache-cold (saving almost 2k code size on typical amd64 setups).
122 - add Symbols.ev and Symbols.event files, that were missing.
123 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
124 - fix #3 "be smart about timeouts" to not "deadlock" when
125 timeout == now, also improve the section overall.
126 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
127 - support new EV_API_STATIC mode to make all libev symbols
128 static.
129 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
130 were empty.
131
1324.04 Wed Feb 16 09:01:51 CET 2011
133 - fix two problems in the native win32 backend, where reuse of fd's
134 with different underlying handles caused handles not to be removed
135 or added to the select set (analyzed and tested by Bert Belder).
136 - do no rely on ceil() in ev_e?poll.c.
137 - backport libev to HP-UX versions before 11 v3.
138 - configure did not detect nanosleep and clock_gettime properly when
139 they are available in the libc (as opposed to -lrt).
140
1414.03 Tue Jan 11 14:37:25 CET 2011
142 - officially support polling files with all backends.
143 - support files, /dev/zero etc. the same way as select in the epoll
144 backend, by generating events on our own.
145 - ports backend: work around solaris bug 6874410 and many related ones
146 (EINTR, maybe more), with no performance loss (note that the solaris
147 bug report is actually wrong, reality is far more bizarre and broken
148 than that).
149 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
150 #ifdef to test for them.
151 - new (experimental) function: ev_feed_signal.
152 - new (to become default) EVFLAG_NOSIGMASK flag.
153 - new EVBACKEND_MASK symbol.
154 - updated COMMON IDIOMS SECTION.
155
1564.01 Fri Nov 5 21:51:29 CET 2010
157 - automake fucked it up, apparently, --add-missing -f is not quite enough
158 to make it update its files, so 4.00 didn't install ev++.h and
159 event.h on make install. grrr.
160 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
161 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
162 - use "(libev) " prefix for all libev error messages now.
163
1644.00 Mon Oct 25 12:32:12 CEST 2010
165 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
166 - ev_embed_stop did not correctly stop the watcher (very good
167 testcase by Vladimir Timofeev).
168 - ev_run will now always update the current loop time - it erroneously
169 didn't when idle watchers were active, causing timers not to fire.
170 - fix a bug where a timeout of zero caused the timer not to fire
171 in the libevent emulation (testcase by Péter Szabó).
172 - applied win32 fixes by Michael Lenaghan (also James Mansion).
173 - replace EV_MINIMAL by EV_FEATURES.
174 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
175 seems the former is *much* faster than the latter.
176 - linux kernel version detection (for inotify bug workarounds)
177 did not work properly.
178 - reduce the number of spurious wake-ups with the ports backend.
179 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
180 - do async init within ev_async_start, not ev_async_set, which avoids
181 an API quirk where the set function must be called in the C++ API
182 even when there is nothing to set.
183 - add (undocumented) EV_ENABLE when adding events with kqueue,
184 this might help with OS X, which seems to need it despite documenting
185 not to need it (helpfully pointed out by Tilghman Lesher).
186 - do not use poll by default on freebsd, it's broken (what isn't
187 on freebsd...).
188 - allow to embed epoll on kernels >= 2.6.32.
189 - configure now prepends -O3, not appends it, so one can still
190 override it.
191 - ev.pod: greatly expanded the portability section, added a porting
192 section, a description of watcher states and made lots of minor fixes.
193 - disable poll backend on AIX, the poll header spams the namespace
194 and it's not worth working around dead platforms (reported
195 and analyzed by Aivars Kalvans).
196 - improve header file compatibility of the standalone eventfd code
197 in an obscure case.
198 - implement EV_AVOID_STDIO option.
199 - do not use sscanf to parse linux version number (smaller, faster,
200 no sscanf dependency).
201 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
202 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
203 - add section on accept() problems to the manpage.
204 - rename EV_TIMEOUT to EV_TIMER.
205 - rename ev_loop_count/depth/verify/loop/unloop.
206 - remove ev_default_destroy and ev_default_fork.
207 - switch to two-digit minor version.
208 - work around an apparent gentoo compiler bug.
209 - define _DARWIN_UNLIMITED_SELECT. just so.
210 - use enum instead of #define for most constants.
211 - improve compatibility to older C++ compilers.
212 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
213 default arguments when compiled as C++.
214 - enable automake dependency tracking.
215 - ev_loop_new no longer leaks memory when loop creation failed.
216 - new ev_cleanup watcher type.
217
2183.9 Thu Dec 31 07:59:59 CET 2009
219 - signalfd is no longer used by default and has to be requested
220 explicitly - this means that easy to catch bugs become hard to
221 catch race conditions, but the users have spoken.
222 - point out the unspecified signal mask in the documentation, and
223 that this is a race condition regardless of EV_SIGNALFD.
224 - backport inotify code to C89.
225 - inotify file descriptors could leak into child processes.
226 - ev_stat watchers could keep an erroneous extra ref on the loop,
227 preventing exit when unregistering all watchers (testcases
228 provided by ry@tinyclouds.org).
229 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
230 symbols to make it easier for apps to do their own fd management.
231 - support EV_IDLE_ENABLE being disabled in ev++.h
232 (patch by Didier Spezia).
233 - take advantage of inotify_init1, if available, to set cloexec/nonblock
234 on fd creation, to avoid races.
235 - the signal handling pipe wasn't always initialised under windows
236 (analysed by lekma).
237 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
238 signalfd.
239 - add missing string.h include (Denis F. Latypoff).
240 - only replace ev_stat.prev when we detect an actual difference,
241 so prev is (almost) always different to attr. this might
242 have caused the problems with 04_stat.t.
243 - add ev::timer->remaining () method to C++ API.
244
2453.8 Sun Aug 9 14:30:45 CEST 2009
246 - incompatible change: do not necessarily reset signal handler
247 to SIG_DFL when a sighandler is stopped.
248 - ev_default_destroy did not properly free or zero some members,
249 potentially causing crashes and memory corruption on repeated
250 ev_default_destroy/ev_default_loop calls.
251 - take advantage of signalfd on GNU/Linux systems.
252 - document that the signal mask might be in an unspecified
253 state when using libev's signal handling.
254 - take advantage of some GNU/Linux calls to set cloexec/nonblock
255 on fd creation, to avoid race conditions.
256
2573.7 Fri Jul 17 16:36:32 CEST 2009
258 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
259 instead of using a per-loop variable (bug caught by accident...).
260 - the ev_set_io_collect_interval interpretation has changed.
261 - add new functionality: ev_set_userdata, ev_userdata,
262 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
263 ev_invoke_pending, ev_pending_count, together with a long example
264 about thread locking.
265 - add ev_timer_remaining (as requested by Denis F. Latypoff).
266 - add ev_loop_depth.
267 - calling ev_unloop in fork/prepare watchers will no longer poll
268 for new events.
269 - Denis F. Latypoff corrected many typos in example code snippets.
270 - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
271 check that the syscall number is available before trying to
272 use it (reported by ry@tinyclouds).
273 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
274 slightly higher accuracy.
275 - properly declare ev_loop_verify and ev_now_update even when
276 !EV_MULTIPLICITY.
277 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
278 - support EV_MINIMAL==2 for a reduced API.
279 - actually 0-initialise struct sigaction when installing signals.
280 - add section on hibernate and stopped processes to ev_timer docs.
281
2823.6 Tue Apr 28 02:49:30 CEST 2009
283 - multiple timers becoming ready within an event loop iteration
284 will be invoked in the "correct" order now.
285 - do not leave the event loop early just because we have no active
286 watchers, fixing a problem when embedding a kqueue loop
287 that has active kernel events but no registered watchers
288 (reported by blacksand blacksand).
289 - correctly zero the idx values for arrays, so destroying and
290 reinitialising the default loop actually works (patch by
291 Malek Hadj-Ali).
292 - implement ev_suspend and ev_resume.
293 - new EV_CUSTOM revents flag for use by applications.
294 - add documentation section about priorities.
295 - add a glossary to the documentation.
296 - extend the ev_fork description slightly.
297 - optimize a jump out of call_pending.
298
2993.53 Sun Feb 15 02:38:20 CET 2009
300 - fix a bug in event pipe creation on win32 that would cause a
301 failed assertion on event loop creation (patch by Malek Hadj-Ali).
302 - probe for CLOCK_REALTIME support at runtime as well and fall
303 back to gettimeofday if there is an error, to support older
304 operating systems with newer header files/libraries.
305 - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
306 (default most everywhere), otherwise not.
2 307
33.52 Wed Jan 7 21:43:02 CET 2009 3083.52 Wed Jan 7 21:43:02 CET 2009
4 - fix compilation of select backend in fd_set mode when NFDBITS is 309 - fix compilation of select backend in fd_set mode when NFDBITS is
5 missing (to get it to compile on QNX, reported by Rodrigo Campos). 310 missing (to get it to compile on QNX, reported by Rodrigo Campos).
6 - better select-nfds handling when select backend is in fd_set mode. 311 - better select-nfds handling when select backend is in fd_set mode.
… …
11 - actually verify that local and remote port are matching in 316 - actually verify that local and remote port are matching in
12 libev's socketpair emulation, which makes denial-of-service 317 libev's socketpair emulation, which makes denial-of-service
13 attacks harder (but not impossible - it's windows). Make sure 318 attacks harder (but not impossible - it's windows). Make sure
14 it even works under vista, which thinks that getpeer/sockname 319 it even works under vista, which thinks that getpeer/sockname
15 should return fantasy port numbers. 320 should return fantasy port numbers.
16 - include "libev" all assertion messages for potentially 321 - include "libev" in all assertion messages for potentially
17 clearer diagnostics. 322 clearer diagnostics.
18 - event_get_version (libevent compatibility) returned 323 - event_get_version (libevent compatibility) returned
19 a useless string instead of the expected version string 324 a useless string instead of the expected version string
20 (patch by W.C.A. Wijngaards). 325 (patch by W.C.A. Wijngaards).
21 326
… …
71 do similar changes for event.c. 376 do similar changes for event.c.
72 377
733.45 Tue Oct 21 21:59:26 CEST 2008 3783.45 Tue Oct 21 21:59:26 CEST 2008
74 - disable inotify usage on linux <2.6.25, as it is broken 379 - disable inotify usage on linux <2.6.25, as it is broken
75 (reported by Yoann Vandoorselaere). 380 (reported by Yoann Vandoorselaere).
76 - ev_stat errornously would try to add inotify watchers 381 - ev_stat erroneously would try to add inotify watchers
77 even when inotify wasn't available (this should only 382 even when inotify wasn't available (this should only
78 have a performance impact). 383 have a performance impact).
79 - ev_once now passes both timeout and io to the callback if both 384 - ev_once now passes both timeout and io to the callback if both
80 occur concurrently, instead of giving timeouts precedence. 385 occur concurrently, instead of giving timeouts precedence.
81 - disable EV_USE_INOTIFY when sys/inotify.h is too old. 386 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
… …
149 - enable inlining with gcc versions 2 and 3. 454 - enable inlining with gcc versions 2 and 3.
150 - work around broken poll implementations potentially 455 - work around broken poll implementations potentially
151 not clearing revents field in ev_poll (Brandon Black) 456 not clearing revents field in ev_poll (Brandon Black)
152 (no such systems are known at this time). 457 (no such systems are known at this time).
153 - work around a bug in realloc on openbsd and darwin, 458 - work around a bug in realloc on openbsd and darwin,
154 also makes the errornous valgrind complaints 459 also makes the erroneous valgrind complaints
155 go away (noted by various people). 460 go away (noted by various people).
156 - fix ev_async_pending, add c++ wrapper for ev_async 461 - fix ev_async_pending, add c++ wrapper for ev_async
157 (based on patch sent by Johannes Deisenhofer. 462 (based on patch sent by Johannes Deisenhofer).
158 - add sensible set method to ev::embed. 463 - add sensible set method to ev::embed.
159 - made integer constants type int in ev.h. 464 - made integer constants type int in ev.h.
160 465
1613.2 Wed Apr 2 17:11:19 CEST 2008 4663.2 Wed Apr 2 17:11:19 CEST 2008
162 - fix a 64 bit overflow issue in the select backend, 467 - fix a 64 bit overflow issue in the select backend,

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