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Comparing libev/Changes (file contents):
Revision 1.102 by root, Sat Mar 14 04:45:39 2009 UTC vs.
Revision 1.285 by root, Thu Feb 28 02:17:20 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_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
9
10TODO: document the special problem of signals around fork.
11TODO: store pid for each signal
12TODO: document file descriptor usage per loop
13TODO: store loop pid_t and compare isndie signal handler,store 1 for same, 2 for differign pid, clean up in loop_fork
14TODO: embed watchers need updating when fd changes
15TODO: document portbaility requirements for atomic pointer access
16 - destroying a non-default loop would stop the global waitpid
17 watcher (Denis Bilenko).
18 - queueing pending watchers of higher priority from a watcher now invokes
19 them in a timely fashion (reported by Denis Bilenko).
20 - add throw() to all libev functions that cannot throw exceptions, for
21 further code size decrease when compiling for C++.
22 - add throw () to callbacks that must not throw exceptions (allocator,
23 syserr, loop acquire/release, periodic reschedule cbs).
24 - fix event_base_loop return code, add event_get_callback, event_base_new,
25 event_base_get_method calls to improve libevent 1.x emulation and add
26 some libevent 2.x functionality (based on a patch by Jeff Davey).
27 - add more memory fences to fix a bug reported by Jeff Davey. Better
28 be overfenced than underprotected.
29 - ev_run now returns a boolean status (true meaning watchers are
30 still active).
31 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
32 libev's EV_ERROR (reported by 191919).
33 - (ecb) add memory fence support for xlC (Darin McBride).
34 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
35 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
36 - work around some kernels losing file descriptors by leaking
37 the kqueue descriptor in the child.
38 - work around linux inotify not reporting IN_ATTRIB changes for directories
39 in many cases.
40 - include sys/syscall.h instead of plain syscall.h.
41 - check for io watcher loops in ev_verify, check for the most
42 common reported usage bug in ev_io_start.
43 - chose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
44 - always use WSASend/WSARecv directly on windows, hoping that this
45 works in all cases (unlike read/write/send/recv...).
46 - try to detect signals around a fork faster (test program by
47 Denis Bilenko).
48 - work around recent glibc versions that leak memory in realloc.
49 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
50 the watcher base set (loop) method.
51 - rewrite the async/signal pipe logic to always keep a valid fd, which
52 simplifies (and hopefuly correctifies :) the race checking
53 on fork, at the cost of one extra fd.
54 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
55 inotify-supporting filesystems.
56 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
57 versions ignore it before
58 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
59 - add some untested android support.
60 - enum expressions must be of type int (reported by Juan Pablo L).
61
624.11 Sat Feb 4 19:52:39 CET 2012
63 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
64 was documented already, but not implemented in the repeating case.
65 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
66 - fix a race where the workaround against the epoll fork bugs
67 caused signals to not be handled anymore.
68 - correct backend_fudge for most backends, and implement a windows
69 specific workaround to avoid looping because we call both
70 select and Sleep, both with different time resolutions.
71 - document range and guarantees of ev_sleep.
72 - document reasonable ranges for periodics interval and offset.
73 - rename backend_fudge to backend_mintime to avoid future confusion :)
74 - change the default periodic reschedule function to hopefully be more
75 exact and correct even in corner cases or in the far future.
76 - do not rely on -lm anymore: use it when available but use our
77 own floor () if it is missing. This should make it easier to embed,
78 as no external libraries are required.
79 - strategically import macros from libecb and mark rarely-used functions
80 as cache-cold (saving almost 2k code size on typical amd64 setups).
81 - add Symbols.ev and Symbols.event files, that were missing.
82 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
83 - fix #3 "be smart about timeouts" to not "deadlock" when
84 timeout == now, also improve the section overall.
85 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
86 - support new EV_API_STATIC mode to make all libev symbols
87 static.
88 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
89 were empty.
90
914.04 Wed Feb 16 09:01:51 CET 2011
92 - fix two problems in the native win32 backend, where reuse of fd's
93 with different underlying handles caused handles not to be removed
94 or added to the select set (analyzed and tested by Bert Belder).
95 - do no rely on ceil() in ev_e?poll.c.
96 - backport libev to HP-UX versions before 11 v3.
97 - configure did not detect nanosleep and clock_gettime properly when
98 they are available in the libc (as opposed to -lrt).
99
1004.03 Tue Jan 11 14:37:25 CET 2011
101 - officially support polling files with all backends.
102 - support files, /dev/zero etc. the same way as select in the epoll
103 backend, by generating events on our own.
104 - ports backend: work around solaris bug 6874410 and many related ones
105 (EINTR, maybe more), with no performance loss (note that the solaris
106 bug report is actually wrong, reality is far more bizarre and broken
107 than that).
108 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
109 #ifdef to test for them.
110 - new (experimental) function: ev_feed_signal.
111 - new (to become default) EVFLAG_NOSIGMASK flag.
112 - new EVBACKEND_MASK symbol.
113 - updated COMMON IDIOMS SECTION.
114
1154.01 Fri Nov 5 21:51:29 CET 2010
116 - automake fucked it up, apparently, --add-missing -f is not quite enough
117 to make it update its files, so 4.00 didn't install ev++.h and
118 event.h on make install. grrr.
119 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
120 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
121 - use "(libev) " prefix for all libev error messages now.
122
1234.00 Mon Oct 25 12:32:12 CEST 2010
124 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
125 - ev_embed_stop did not correctly stop the watcher (very good
126 testcase by Vladimir Timofeev).
127 - ev_run will now always update the current loop time - it erroneously
128 didn't when idle watchers were active, causing timers not to fire.
129 - fix a bug where a timeout of zero caused the timer not to fire
130 in the libevent emulation (testcase by Péter Szabó).
131 - applied win32 fixes by Michael Lenaghan (also James Mansion).
132 - replace EV_MINIMAL by EV_FEATURES.
133 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
134 seems the former is *much* faster than the latter.
135 - linux kernel version detection (for inotify bug workarounds)
136 did not work properly.
137 - reduce the number of spurious wake-ups with the ports backend.
138 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
139 - do async init within ev_async_start, not ev_async_set, which avoids
140 an API quirk where the set function must be called in the C++ API
141 even when there is nothing to set.
142 - add (undocumented) EV_ENABLE when adding events with kqueue,
143 this might help with OS X, which seems to need it despite documenting
144 not to need it (helpfully pointed out by Tilghman Lesher).
145 - do not use poll by default on freebsd, it's broken (what isn't
146 on freebsd...).
147 - allow to embed epoll on kernels >= 2.6.32.
148 - configure now prepends -O3, not appends it, so one can still
149 override it.
150 - ev.pod: greatly expanded the portability section, added a porting
151 section, a description of watcher states and made lots of minor fixes.
152 - disable poll backend on AIX, the poll header spams the namespace
153 and it's not worth working around dead platforms (reported
154 and analyzed by Aivars Kalvans).
155 - improve header file compatibility of the standalone eventfd code
156 in an obscure case.
157 - implement EV_AVOID_STDIO option.
158 - do not use sscanf to parse linux version number (smaller, faster,
159 no sscanf dependency).
160 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
161 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
162 - add section on accept() problems to the manpage.
163 - rename EV_TIMEOUT to EV_TIMER.
164 - rename ev_loop_count/depth/verify/loop/unloop.
165 - remove ev_default_destroy and ev_default_fork.
166 - switch to two-digit minor version.
167 - work around an apparent gentoo compiler bug.
168 - define _DARWIN_UNLIMITED_SELECT. just so.
169 - use enum instead of #define for most constants.
170 - improve compatibility to older C++ compilers.
171 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
172 default arguments when compiled as C++.
173 - enable automake dependency tracking.
174 - ev_loop_new no longer leaks memory when loop creation failed.
175 - new ev_cleanup watcher type.
176
1773.9 Thu Dec 31 07:59:59 CET 2009
178 - signalfd is no longer used by default and has to be requested
179 explicitly - this means that easy to catch bugs become hard to
180 catch race conditions, but the users have spoken.
181 - point out the unspecified signal mask in the documentation, and
182 that this is a race condition regardless of EV_SIGNALFD.
183 - backport inotify code to C89.
184 - inotify file descriptors could leak into child processes.
185 - ev_stat watchers could keep an erroneous extra ref on the loop,
186 preventing exit when unregistering all watchers (testcases
187 provided by ry@tinyclouds.org).
188 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
189 symbols to make it easier for apps to do their own fd management.
190 - support EV_IDLE_ENABLE being disabled in ev++.h
191 (patch by Didier Spezia).
192 - take advantage of inotify_init1, if available, to set cloexec/nonblock
193 on fd creation, to avoid races.
194 - the signal handling pipe wasn't always initialised under windows
195 (analysed by lekma).
196 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
197 signalfd.
198 - add missing string.h include (Denis F. Latypoff).
199 - only replace ev_stat.prev when we detect an actual difference,
200 so prev is (almost) always different to attr. this might
201 have caused the problems with 04_stat.t.
202 - add ev::timer->remaining () method to C++ API.
203
2043.8 Sun Aug 9 14:30:45 CEST 2009
205 - incompatible change: do not necessarily reset signal handler
206 to SIG_DFL when a sighandler is stopped.
207 - ev_default_destroy did not properly free or zero some members,
208 potentially causing crashes and memory corruption on repeated
209 ev_default_destroy/ev_default_loop calls.
210 - take advantage of signalfd on GNU/Linux systems.
211 - document that the signal mask might be in an unspecified
212 state when using libev's signal handling.
213 - take advantage of some GNU/Linux calls to set cloexec/nonblock
214 on fd creation, to avoid race conditions.
215
2163.7 Fri Jul 17 16:36:32 CEST 2009
217 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
218 instead of using a per-loop variable (bug caught by accident...).
219 - the ev_set_io_collect_interval interpretation has changed.
220 - add new functionality: ev_set_userdata, ev_userdata,
221 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
222 ev_invoke_pending, ev_pending_count, together with a long example
223 about thread locking.
224 - add ev_timer_remaining (as requested by Denis F. Latypoff).
225 - add ev_loop_depth.
226 - calling ev_unloop in fork/prepare watchers will no longer poll
227 for new events.
228 - Denis F. Latypoff corrected many typos in example code snippets.
229 - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
230 check that the syscall number is available before trying to
231 use it (reported by ry@tinyclouds).
232 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
233 slightly higher accuracy.
234 - properly declare ev_loop_verify and ev_now_update even when
235 !EV_MULTIPLICITY.
236 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
237 - support EV_MINIMAL==2 for a reduced API.
238 - actually 0-initialise struct sigaction when installing signals.
239 - add section on hibernate and stopped processes to ev_timer docs.
240
2413.6 Tue Apr 28 02:49:30 CEST 2009
242 - multiple timers becoming ready within an event loop iteration
243 will be invoked in the "correct" order now.
244 - do not leave the event loop early just because we have no active
245 watchers, fixing a problem when embedding a kqueue loop
246 that has active kernel events but no registered watchers
247 (reported by blacksand blacksand).
3 - correctly zero the idx values for arrays, so destroying and 248 - correctly zero the idx values for arrays, so destroying and
4 reinitialising the default loop actually works (patch by 249 reinitialising the default loop actually works (patch by
5 Malek Hadj-Ali). 250 Malek Hadj-Ali).
251 - implement ev_suspend and ev_resume.
252 - new EV_CUSTOM revents flag for use by applications.
253 - add documentation section about priorities.
254 - add a glossary to the dcoumentation.
255 - extend the ev_fork description slightly.
256 - optimize a jump out of call_pending.
6 257
73.53 Sun Feb 15 02:38:20 CET 2009 2583.53 Sun Feb 15 02:38:20 CET 2009
8 - fix a bug in event pipe creation on win32 that would cause a 259 - fix a bug in event pipe creation on win32 that would cause a
9 failed assertion on event loop creation (patch by Malek Hadj-Ali). 260 failed assertion on event loop creation (patch by Malek Hadj-Ali).
10 - probe for CLOCK_REALTIME support at runtime as well and fall 261 - probe for CLOCK_REALTIME support at runtime as well and fall
… …
84 do similar changes for event.c. 335 do similar changes for event.c.
85 336
863.45 Tue Oct 21 21:59:26 CEST 2008 3373.45 Tue Oct 21 21:59:26 CEST 2008
87 - disable inotify usage on linux <2.6.25, as it is broken 338 - disable inotify usage on linux <2.6.25, as it is broken
88 (reported by Yoann Vandoorselaere). 339 (reported by Yoann Vandoorselaere).
89 - ev_stat errornously would try to add inotify watchers 340 - ev_stat erroneously would try to add inotify watchers
90 even when inotify wasn't available (this should only 341 even when inotify wasn't available (this should only
91 have a performance impact). 342 have a performance impact).
92 - ev_once now passes both timeout and io to the callback if both 343 - ev_once now passes both timeout and io to the callback if both
93 occur concurrently, instead of giving timeouts precedence. 344 occur concurrently, instead of giving timeouts precedence.
94 - disable EV_USE_INOTIFY when sys/inotify.h is too old. 345 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
… …
162 - enable inlining with gcc versions 2 and 3. 413 - enable inlining with gcc versions 2 and 3.
163 - work around broken poll implementations potentially 414 - work around broken poll implementations potentially
164 not clearing revents field in ev_poll (Brandon Black) 415 not clearing revents field in ev_poll (Brandon Black)
165 (no such systems are known at this time). 416 (no such systems are known at this time).
166 - work around a bug in realloc on openbsd and darwin, 417 - work around a bug in realloc on openbsd and darwin,
167 also makes the errornous valgrind complaints 418 also makes the erroneous valgrind complaints
168 go away (noted by various people). 419 go away (noted by various people).
169 - fix ev_async_pending, add c++ wrapper for ev_async 420 - fix ev_async_pending, add c++ wrapper for ev_async
170 (based on patch sent by Johannes Deisenhofer. 421 (based on patch sent by Johannes Deisenhofer).
171 - add sensible set method to ev::embed. 422 - add sensible set method to ev::embed.
172 - made integer constants type int in ev.h. 423 - made integer constants type int in ev.h.
173 424
1743.2 Wed Apr 2 17:11:19 CEST 2008 4253.2 Wed Apr 2 17:11:19 CEST 2008
175 - fix a 64 bit overflow issue in the select backend, 426 - fix a 64 bit overflow issue in the select backend,

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