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Comparing libev/Changes (file contents):
Revision 1.127 by root, Wed Jul 15 16:08:24 2009 UTC vs.
Revision 1.292 by root, Tue Oct 29 12:53:38 2013 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_walk 3TODO: ev_loop_wakeup
4TODO: remain 4TODO: EV_STANDALONE == NO_HASSEL (do not use clock_gettime in ev_standalone)
5TODO: EV_MINIMAL 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 portbaility requirements for atomic pointer access
6 15
7 - new functionality: ev_set_userdata, ev_userdata, 16 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
8 ev_set_invoke_pending_cb, ev_set_loop_release_cb, 17 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
9 ev_invoke_pending, together with a long example about thread 18 - use a reasonable fallback for EV_NSIG instead of erroring out
10 locking. 19 when we can't detect the signal set size.
20 - in the absence of autoconf, do not use the clock syscall
21 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
22 doing clock_gettime in userspace).
23
244.15 Fri Mar 1 12:04:50 CET 2013
25 - destroying a non-default loop would stop the global waitpid
26 watcher (Denis Bilenko).
27 - queueing pending watchers of higher priority from a watcher now invokes
28 them in a timely fashion (reported by Denis Bilenko).
29 - add throw() to all libev functions that cannot throw exceptions, for
30 further code size decrease when compiling for C++.
31 - add throw () to callbacks that must not throw exceptions (allocator,
32 syserr, loop acquire/release, periodic reschedule cbs).
33 - fix event_base_loop return code, add event_get_callback, event_base_new,
34 event_base_get_method calls to improve libevent 1.x emulation and add
35 some libevent 2.x functionality (based on a patch by Jeff Davey).
36 - add more memory fences to fix a bug reported by Jeff Davey. Better
37 be overfenced than underprotected.
38 - ev_run now returns a boolean status (true meaning watchers are
39 still active).
40 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
41 libev's EV_ERROR (reported by 191919).
42 - (ecb) add memory fence support for xlC (Darin McBride).
43 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
44 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
45 - work around some kernels losing file descriptors by leaking
46 the kqueue descriptor in the child.
47 - work around linux inotify not reporting IN_ATTRIB changes for directories
48 in many cases.
49 - include sys/syscall.h instead of plain syscall.h.
50 - check for io watcher loops in ev_verify, check for the most
51 common reported usage bug in ev_io_start.
52 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
53 - always use WSASend/WSARecv directly on windows, hoping that this
54 works in all cases (unlike read/write/send/recv...).
55 - try to detect signals around a fork faster (test program by
56 Denis Bilenko).
57 - work around recent glibc versions that leak memory in realloc.
58 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
59 the watcher base set (loop) method.
60 - rewrite the async/signal pipe logic to always keep a valid fd, which
61 simplifies (and hopefully correctifies :) the race checking
62 on fork, at the cost of one extra fd.
63 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
64 inotify-supporting filesystems.
65 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
66 versions ignore it before
67 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
68 - add some untested android support.
69 - enum expressions must be of type int (reported by Juan Pablo L).
70
714.11 Sat Feb 4 19:52:39 CET 2012
72 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
73 was documented already, but not implemented in the repeating case.
74 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
75 - fix a race where the workaround against the epoll fork bugs
76 caused signals to not be handled anymore.
77 - correct backend_fudge for most backends, and implement a windows
78 specific workaround to avoid looping because we call both
79 select and Sleep, both with different time resolutions.
80 - document range and guarantees of ev_sleep.
81 - document reasonable ranges for periodics interval and offset.
82 - rename backend_fudge to backend_mintime to avoid future confusion :)
83 - change the default periodic reschedule function to hopefully be more
84 exact and correct even in corner cases or in the far future.
85 - do not rely on -lm anymore: use it when available but use our
86 own floor () if it is missing. This should make it easier to embed,
87 as no external libraries are required.
88 - strategically import macros from libecb and mark rarely-used functions
89 as cache-cold (saving almost 2k code size on typical amd64 setups).
90 - add Symbols.ev and Symbols.event files, that were missing.
91 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
92 - fix #3 "be smart about timeouts" to not "deadlock" when
93 timeout == now, also improve the section overall.
94 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
95 - support new EV_API_STATIC mode to make all libev symbols
96 static.
97 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
98 were empty.
99
1004.04 Wed Feb 16 09:01:51 CET 2011
101 - fix two problems in the native win32 backend, where reuse of fd's
102 with different underlying handles caused handles not to be removed
103 or added to the select set (analyzed and tested by Bert Belder).
104 - do no rely on ceil() in ev_e?poll.c.
105 - backport libev to HP-UX versions before 11 v3.
106 - configure did not detect nanosleep and clock_gettime properly when
107 they are available in the libc (as opposed to -lrt).
108
1094.03 Tue Jan 11 14:37:25 CET 2011
110 - officially support polling files with all backends.
111 - support files, /dev/zero etc. the same way as select in the epoll
112 backend, by generating events on our own.
113 - ports backend: work around solaris bug 6874410 and many related ones
114 (EINTR, maybe more), with no performance loss (note that the solaris
115 bug report is actually wrong, reality is far more bizarre and broken
116 than that).
117 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
118 #ifdef to test for them.
119 - new (experimental) function: ev_feed_signal.
120 - new (to become default) EVFLAG_NOSIGMASK flag.
121 - new EVBACKEND_MASK symbol.
122 - updated COMMON IDIOMS SECTION.
123
1244.01 Fri Nov 5 21:51:29 CET 2010
125 - automake fucked it up, apparently, --add-missing -f is not quite enough
126 to make it update its files, so 4.00 didn't install ev++.h and
127 event.h on make install. grrr.
128 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
129 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
130 - use "(libev) " prefix for all libev error messages now.
131
1324.00 Mon Oct 25 12:32:12 CEST 2010
133 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
134 - ev_embed_stop did not correctly stop the watcher (very good
135 testcase by Vladimir Timofeev).
136 - ev_run will now always update the current loop time - it erroneously
137 didn't when idle watchers were active, causing timers not to fire.
138 - fix a bug where a timeout of zero caused the timer not to fire
139 in the libevent emulation (testcase by Péter Szabó).
140 - applied win32 fixes by Michael Lenaghan (also James Mansion).
141 - replace EV_MINIMAL by EV_FEATURES.
142 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
143 seems the former is *much* faster than the latter.
144 - linux kernel version detection (for inotify bug workarounds)
145 did not work properly.
146 - reduce the number of spurious wake-ups with the ports backend.
147 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
148 - do async init within ev_async_start, not ev_async_set, which avoids
149 an API quirk where the set function must be called in the C++ API
150 even when there is nothing to set.
151 - add (undocumented) EV_ENABLE when adding events with kqueue,
152 this might help with OS X, which seems to need it despite documenting
153 not to need it (helpfully pointed out by Tilghman Lesher).
154 - do not use poll by default on freebsd, it's broken (what isn't
155 on freebsd...).
156 - allow to embed epoll on kernels >= 2.6.32.
157 - configure now prepends -O3, not appends it, so one can still
158 override it.
159 - ev.pod: greatly expanded the portability section, added a porting
160 section, a description of watcher states and made lots of minor fixes.
161 - disable poll backend on AIX, the poll header spams the namespace
162 and it's not worth working around dead platforms (reported
163 and analyzed by Aivars Kalvans).
164 - improve header file compatibility of the standalone eventfd code
165 in an obscure case.
166 - implement EV_AVOID_STDIO option.
167 - do not use sscanf to parse linux version number (smaller, faster,
168 no sscanf dependency).
169 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
170 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
171 - add section on accept() problems to the manpage.
172 - rename EV_TIMEOUT to EV_TIMER.
173 - rename ev_loop_count/depth/verify/loop/unloop.
174 - remove ev_default_destroy and ev_default_fork.
175 - switch to two-digit minor version.
176 - work around an apparent gentoo compiler bug.
177 - define _DARWIN_UNLIMITED_SELECT. just so.
178 - use enum instead of #define for most constants.
179 - improve compatibility to older C++ compilers.
180 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
181 default arguments when compiled as C++.
182 - enable automake dependency tracking.
183 - ev_loop_new no longer leaks memory when loop creation failed.
184 - new ev_cleanup watcher type.
185
1863.9 Thu Dec 31 07:59:59 CET 2009
187 - signalfd is no longer used by default and has to be requested
188 explicitly - this means that easy to catch bugs become hard to
189 catch race conditions, but the users have spoken.
190 - point out the unspecified signal mask in the documentation, and
191 that this is a race condition regardless of EV_SIGNALFD.
192 - backport inotify code to C89.
193 - inotify file descriptors could leak into child processes.
194 - ev_stat watchers could keep an erroneous extra ref on the loop,
195 preventing exit when unregistering all watchers (testcases
196 provided by ry@tinyclouds.org).
197 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
198 symbols to make it easier for apps to do their own fd management.
199 - support EV_IDLE_ENABLE being disabled in ev++.h
200 (patch by Didier Spezia).
201 - take advantage of inotify_init1, if available, to set cloexec/nonblock
202 on fd creation, to avoid races.
203 - the signal handling pipe wasn't always initialised under windows
204 (analysed by lekma).
205 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
206 signalfd.
207 - add missing string.h include (Denis F. Latypoff).
208 - only replace ev_stat.prev when we detect an actual difference,
209 so prev is (almost) always different to attr. this might
210 have caused the problems with 04_stat.t.
211 - add ev::timer->remaining () method to C++ API.
212
2133.8 Sun Aug 9 14:30:45 CEST 2009
214 - incompatible change: do not necessarily reset signal handler
215 to SIG_DFL when a sighandler is stopped.
216 - ev_default_destroy did not properly free or zero some members,
217 potentially causing crashes and memory corruption on repeated
218 ev_default_destroy/ev_default_loop calls.
219 - take advantage of signalfd on GNU/Linux systems.
220 - document that the signal mask might be in an unspecified
221 state when using libev's signal handling.
222 - take advantage of some GNU/Linux calls to set cloexec/nonblock
223 on fd creation, to avoid race conditions.
224
2253.7 Fri Jul 17 16:36:32 CEST 2009
11 - ev_unloop and ev_loop wrongly used a global variable to exit loops, 226 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
12 instead of using a per-loop variable (bug caught by accident...). 227 instead of using a per-loop variable (bug caught by accident...).
228 - the ev_set_io_collect_interval interpretation has changed.
229 - add new functionality: ev_set_userdata, ev_userdata,
230 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
231 ev_invoke_pending, ev_pending_count, together with a long example
232 about thread locking.
233 - add ev_timer_remaining (as requested by Denis F. Latypoff).
234 - add ev_loop_depth.
13 - calling ev_unloop in fork/prepare watchers will no longer poll 235 - calling ev_unloop in fork/prepare watchers will no longer poll
14 for new events. 236 for new events.
15 - Denis F. Latypoff corrected many typos in example code snippets. 237 - Denis F. Latypoff corrected many typos in example code snippets.
16 - the ev_set_io_collect_interval interpretation has changed.
17 - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double- 238 - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
18 check that the syscall number is available before trying to 239 check that the syscall number is available before trying to
19 use it (reported by ry@tinyclouds). 240 use it (reported by ry@tinyclouds).
20 - use GetSystemTimeAsFileTime instead of _timeb on windows, for 241 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
21 slightly higher accuracy. 242 slightly higher accuracy.
22 - properly declare ev_loop_verify and ev_now_update even when 243 - properly declare ev_loop_verify and ev_now_update even when
23 !EV_MULTIPLICITY. 244 !EV_MULTIPLICITY.
24 - implement ev_loop_depth.
25 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI. 245 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
26 - support EV_MINIMAL==2 for a reduced API. 246 - support EV_MINIMAL==2 for a reduced API.
27 - actually 0-initialise struct sigaction when installing signals. 247 - actually 0-initialise struct sigaction when installing signals.
28 - add section on hibernate and stopped processes to ev_timer docs. 248 - add section on hibernate and stopped processes to ev_timer docs.
29 249
… …
37 - correctly zero the idx values for arrays, so destroying and 257 - correctly zero the idx values for arrays, so destroying and
38 reinitialising the default loop actually works (patch by 258 reinitialising the default loop actually works (patch by
39 Malek Hadj-Ali). 259 Malek Hadj-Ali).
40 - implement ev_suspend and ev_resume. 260 - implement ev_suspend and ev_resume.
41 - new EV_CUSTOM revents flag for use by applications. 261 - new EV_CUSTOM revents flag for use by applications.
42 - add documentation section about priorites. 262 - add documentation section about priorities.
43 - add a glossary to the dcoumentation. 263 - add a glossary to the documentation.
44 - extend the ev_fork description slightly. 264 - extend the ev_fork description slightly.
45 - optimize a jump out of call_pending. 265 - optimize a jump out of call_pending.
46 266
473.53 Sun Feb 15 02:38:20 CET 2009 2673.53 Sun Feb 15 02:38:20 CET 2009
48 - fix a bug in event pipe creation on win32 that would cause a 268 - fix a bug in event pipe creation on win32 that would cause a
… …
124 do similar changes for event.c. 344 do similar changes for event.c.
125 345
1263.45 Tue Oct 21 21:59:26 CEST 2008 3463.45 Tue Oct 21 21:59:26 CEST 2008
127 - disable inotify usage on linux <2.6.25, as it is broken 347 - disable inotify usage on linux <2.6.25, as it is broken
128 (reported by Yoann Vandoorselaere). 348 (reported by Yoann Vandoorselaere).
129 - ev_stat errornously would try to add inotify watchers 349 - ev_stat erroneously would try to add inotify watchers
130 even when inotify wasn't available (this should only 350 even when inotify wasn't available (this should only
131 have a performance impact). 351 have a performance impact).
132 - ev_once now passes both timeout and io to the callback if both 352 - ev_once now passes both timeout and io to the callback if both
133 occur concurrently, instead of giving timeouts precedence. 353 occur concurrently, instead of giving timeouts precedence.
134 - disable EV_USE_INOTIFY when sys/inotify.h is too old. 354 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
… …
202 - enable inlining with gcc versions 2 and 3. 422 - enable inlining with gcc versions 2 and 3.
203 - work around broken poll implementations potentially 423 - work around broken poll implementations potentially
204 not clearing revents field in ev_poll (Brandon Black) 424 not clearing revents field in ev_poll (Brandon Black)
205 (no such systems are known at this time). 425 (no such systems are known at this time).
206 - work around a bug in realloc on openbsd and darwin, 426 - work around a bug in realloc on openbsd and darwin,
207 also makes the errornous valgrind complaints 427 also makes the erroneous valgrind complaints
208 go away (noted by various people). 428 go away (noted by various people).
209 - fix ev_async_pending, add c++ wrapper for ev_async 429 - fix ev_async_pending, add c++ wrapper for ev_async
210 (based on patch sent by Johannes Deisenhofer. 430 (based on patch sent by Johannes Deisenhofer).
211 - add sensible set method to ev::embed. 431 - add sensible set method to ev::embed.
212 - made integer constants type int in ev.h. 432 - made integer constants type int in ev.h.
213 433
2143.2 Wed Apr 2 17:11:19 CEST 2008 4343.2 Wed Apr 2 17:11:19 CEST 2008
215 - fix a 64 bit overflow issue in the select backend, 435 - fix a 64 bit overflow issue in the select backend,

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