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Revision: 1.222
Committed: Sun Jan 30 19:05:40 2011 UTC (13 years, 3 months ago) by root
Branch: MAIN
Changes since 1.221: +2 -0 lines
Log Message:
periodic_recalc, hpux

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 1.221 TODO: signal mask problem documentation
4     TODO: ev_loop_wakeup
5 root 1.222 TODO: windows handle caching, added/not removed in ev_select.c
6 root 1.221 - do no rely on ceil() in ev_e?poll.c.
7 root 1.222 - backport libev to HP-UX versions before 11 v3.
8 root 1.221
9 root 1.219 4.03 Tue Jan 11 14:37:25 CET 2011
10 root 1.217 - officially support polling files with all backends.
11 root 1.212 - support files, /dev/zero etc. the same way as select in the epoll
12     backend, by generating events on our own.
13 root 1.217 - ports backend: work around solaris bug 6874410 and many related ones
14     (EINTR, maybe more), with no performance loss (note that the solaris
15     bug report is actually wrong, reality is far more bizarre and broken
16     than that).
17 root 1.209 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
18     #ifdef to test for them.
19 root 1.213 - new (experimental) function: ev_feed_signal.
20     - new (to become default) EVFLAG_NOSIGMASK flag.
21     - new EVBACKEND_MASK symbol.
22 root 1.220 - updated COMMON IDIOMS SECTION.
23 root 1.209
24 root 1.207 4.01 Fri Nov 5 21:51:29 CET 2010
25 root 1.205 - automake fucked it up, apparently, --add-missing -f is not quite enough
26 root 1.206 to make it update its files, so 4.00 didn't install ev++.h and
27     event.h on make install. grrr.
28     - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
29 root 1.203 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
30 root 1.204 - use "(libev) " prefix for all libev error messages now.
31 root 1.203
32 root 1.202 4.00 Mon Oct 25 12:32:12 CEST 2010
33 root 1.171 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
34 root 1.161 - ev_embed_stop did not correctly stop the watcher (very good
35     testcase by Vladimir Timofeev).
36 sf-exg 1.191 - ev_run will now always update the current loop time - it erroneously
37 root 1.187 didn't when idle watchers were active, causing timers not to fire.
38 root 1.179 - fix a bug where a timeout of zero caused the timer not to fire
39     in the libevent emulation (testcase by Péter Szabó).
40 root 1.164 - applied win32 fixes by Michael Lenaghan (also James Mansion).
41 root 1.166 - replace EV_MINIMAL by EV_FEATURES.
42 root 1.178 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
43     seems the former is *much* faster than the latter.
44 root 1.197 - linux kernel version detection (for inotify bug workarounds)
45     did not work properly.
46 root 1.185 - reduce the number of spurious wake-ups with the ports backend.
47 root 1.158 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
48 root 1.186 - do async init within ev_async_start, not ev_async_set, which avoids
49     an API quirk where the set function must be called in the C++ API
50     even when there is nothing to set.
51 root 1.174 - add (undocumented) EV_ENABLE when adding events with kqueue,
52 root 1.175 this might help with OS X, which seems to need it despite documenting
53     not to need it (helpfully pointed out by Tilghman Lesher).
54 root 1.176 - do not use poll by default on freebsd, it's broken (what isn't
55     on freebsd...).
56 root 1.195 - allow to embed epoll on kernels >= 2.6.32.
57 root 1.159 - configure now prepends -O3, not appends it, so one can still
58     override it.
59 root 1.190 - ev.pod: greatly expanded the portability section, added a porting
60     section, a description of watcher states and made lots of minor fixes.
61 root 1.160 - disable poll backend on AIX, the poll header spams the namespace
62     and it's not worth working around dead platforms (reported
63     and analyzed by Aivars Kalvans).
64 root 1.162 - improve header file compatibility of the standalone eventfd code
65     in an obscure case.
66 root 1.163 - implement EV_AVOID_STDIO option.
67     - do not use sscanf to parse linux version number (smaller, faster,
68     no sscanf dependency).
69 root 1.164 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
70 sf-exg 1.172 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
71 root 1.165 - add section on accept() problems to the manpage.
72 root 1.168 - rename EV_TIMEOUT to EV_TIMER.
73 root 1.190 - rename ev_loop_count/depth/verify/loop/unloop.
74 root 1.197 - remove ev_default_destroy and ev_default_fork.
75 root 1.168 - switch to two-digit minor version.
76 root 1.180 - work around an apparent gentoo compiler bug.
77 root 1.181 - define _DARWIN_UNLIMITED_SELECT. just so.
78 root 1.188 - use enum instead of #define for most constants.
79     - improve compatibility to older C++ compilers.
80 root 1.193 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
81     default arguments when compiled as C++.
82 root 1.196 - enable automake dependency tracking.
83 root 1.197 - ev_loop_new no longer leaks memory when loop creation failed.
84 root 1.198 - new ev_cleanup watcher type.
85 root 1.157
86 root 1.156 3.9 Thu Dec 31 07:59:59 CET 2009
87 root 1.155 - signalfd is no longer used by default and has to be requested
88     explicitly - this means that easy to catch bugs become hard to
89     catch race conditions, but the users have spoken.
90     - point out the unspecified signal mask in the documentation, and
91     that this is a race condition regardless of EV_SIGNALFD.
92 root 1.142 - backport inotify code to C89.
93 root 1.148 - inotify file descriptors could leak into child processes.
94 root 1.151 - ev_stat watchers could keep an errornous extra ref on the loop,
95     preventing exit when unregistering all watchers (testcases
96 root 1.150 provided by ry@tinyclouds.org).
97 root 1.143 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
98 root 1.145 symbols to make it easier for apps to do their own fd management.
99 root 1.144 - support EV_IDLE_ENABLE being disabled in ev++.h
100     (patch by Didier Spezia).
101 root 1.147 - take advantage of inotify_init1, if available, to set cloexec/nonblock
102     on fd creation, to avoid races.
103 root 1.150 - the signal handling pipe wasn't always initialised under windows
104     (analysed by lekma).
105 root 1.146 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
106     signalfd.
107 root 1.152 - add missing string.h include (Denis F. Latypoff).
108 root 1.153 - only replace ev_stat.prev when we detect an actual difference,
109     so prev is (almost) always different to attr. this might
110 sf-exg 1.191 have caused the problems with 04_stat.t.
111 root 1.154 - add ev::timer->remaining () method to C++ API.
112 root 1.142
113 root 1.141 3.8 Sun Aug 9 14:30:45 CEST 2009
114 root 1.133 - incompatible change: do not necessarily reset signal handler
115     to SIG_DFL when a sighandler is stopped.
116 root 1.135 - ev_default_destroy did not properly free or zero some members,
117 sf-exg 1.191 potentially causing crashes and memory corruption on repeated
118 root 1.134 ev_default_destroy/ev_default_loop calls.
119 root 1.133 - take advantage of signalfd on GNU/Linux systems.
120     - document that the signal mask might be in an unspecified
121     state when using libev's signal handling.
122 root 1.136 - take advantage of some GNU/Linux calls to set cloexec/nonblock
123     on fd creation, to avoid race conditions.
124 root 1.132
125 root 1.131 3.7 Fri Jul 17 16:36:32 CEST 2009
126 root 1.128 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
127     instead of using a per-loop variable (bug caught by accident...).
128     - the ev_set_io_collect_interval interpretation has changed.
129     - add new functionality: ev_set_userdata, ev_userdata,
130 root 1.126 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
131 root 1.132 ev_invoke_pending, ev_pending_count, together with a long example
132     about thread locking.
133 root 1.128 - add ev_timer_remaining (as requested by Denis F. Latypoff).
134     - add ev_loop_depth.
135 root 1.124 - calling ev_unloop in fork/prepare watchers will no longer poll
136     for new events.
137 root 1.115 - Denis F. Latypoff corrected many typos in example code snippets.
138     - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
139     check that the syscall number is available before trying to
140     use it (reported by ry@tinyclouds).
141 root 1.117 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
142 root 1.116 slightly higher accuracy.
143 root 1.122 - properly declare ev_loop_verify and ev_now_update even when
144     !EV_MULTIPLICITY.
145 root 1.121 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
146 root 1.123 - support EV_MINIMAL==2 for a reduced API.
147 root 1.125 - actually 0-initialise struct sigaction when installing signals.
148 root 1.127 - add section on hibernate and stopped processes to ev_timer docs.
149 root 1.115
150 root 1.113 3.6 Tue Apr 28 02:49:30 CEST 2009
151 root 1.107 - multiple timers becoming ready within an event loop iteration
152     will be invoked in the "correct" order now.
153 root 1.105 - do not leave the event loop early just because we have no active
154     watchers, fixing a problem when embedding a kqueue loop
155     that has active kernel events but no registered watchers
156     (reported by blacksand blacksand).
157 root 1.102 - correctly zero the idx values for arrays, so destroying and
158     reinitialising the default loop actually works (patch by
159     Malek Hadj-Ali).
160 root 1.108 - implement ev_suspend and ev_resume.
161 root 1.106 - new EV_CUSTOM revents flag for use by applications.
162 root 1.109 - add documentation section about priorites.
163     - add a glossary to the dcoumentation.
164 root 1.111 - extend the ev_fork description slightly.
165 root 1.112 - optimize a jump out of call_pending.
166 root 1.102
167 root 1.101 3.53 Sun Feb 15 02:38:20 CET 2009
168     - fix a bug in event pipe creation on win32 that would cause a
169     failed assertion on event loop creation (patch by Malek Hadj-Ali).
170 root 1.100 - probe for CLOCK_REALTIME support at runtime as well and fall
171     back to gettimeofday if there is an error, to support older
172     operating systems with newer header files/libraries.
173     - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
174     (default most everywhere), otherwise not.
175    
176 root 1.99 3.52 Wed Jan 7 21:43:02 CET 2009
177 root 1.97 - fix compilation of select backend in fd_set mode when NFDBITS is
178     missing (to get it to compile on QNX, reported by Rodrigo Campos).
179     - better select-nfds handling when select backend is in fd_set mode.
180     - diagnose fd_set overruns when select backend is in fd_set mode.
181     - due to a thinko, instead of disabling everything but
182     select on the borked OS X platform, everything but select was
183     allowed (reported by Emanuele Giaquinta).
184 root 1.95 - actually verify that local and remote port are matching in
185     libev's socketpair emulation, which makes denial-of-service
186     attacks harder (but not impossible - it's windows). Make sure
187 root 1.96 it even works under vista, which thinks that getpeer/sockname
188     should return fantasy port numbers.
189 root 1.100 - include "libev" in all assertion messages for potentially
190 root 1.97 clearer diagnostics.
191 root 1.98 - event_get_version (libevent compatibility) returned
192     a useless string instead of the expected version string
193     (patch by W.C.A. Wijngaards).
194 root 1.95
195 root 1.94 3.51 Wed Dec 24 23:00:11 CET 2008
196 root 1.91 - fix a bug where an inotify watcher was added twice, causing
197 root 1.92 freezes on hash collisions (reported and analysed by Graham Leggett).
198 root 1.87 - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
199     a direct syscall - slower, but no dependency on librt et al.
200 root 1.88 - assume negative return values != -1 signals success of port_getn
201     (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
202     (no known failure reports, but it doesn't hurt).
203 root 1.93 - fork detection in ev_embed now stops and restarts the watcher
204     automatically.
205 root 1.89 - EXPERIMENTAL: default the method to operator () in ev++.h,
206     to make it nicer to use functors (requested by Benedek László).
207     - fixed const object callbacks in ev++.h.
208 root 1.90 - replaced loop_ref argument of watcher.set (loop) by a direct
209     ev_loop * in ev++.h, to avoid clashes with functor patch.
210 root 1.91 - do not try to watch the empty string via inotify.
211 root 1.92 - inotify watchers could be leaked under certain circumstances.
212     - OS X 10.5 is actually even more broken than earlier versions,
213     so fall back to select on that piece of garbage.
214 root 1.93 - fixed some weirdness in the ev_embed documentation.
215 root 1.87
216 root 1.86 3.49 Wed Nov 19 11:26:53 CET 2008
217 root 1.83 - ev_stat watchers will now use inotify as a mere hint on
218     kernels <2.6.25, or if the filesystem is not in the
219     "known to be good" list.
220 root 1.84 - better mingw32 compatibility (it's not as borked as native win32)
221     (analysed by Roger Pack).
222 root 1.85 - include stdio.h in the example program, as too many people are
223     confused by the weird C language otherwise. I guess the next thing
224     I get told is that the "..." ellipses in the examples don't compile
225     with their C compiler.
226 root 1.83
227 root 1.80 3.48 Thu Oct 30 09:02:37 CET 2008
228 root 1.71 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
229     backend by assuming the kernel event mask hasn't changed if
230     ADD fails with EEXIST.
231 root 1.75 - work around spurious event notification bugs in epoll by using
232 root 1.77 a 32-bit generation counter. recreate kernel state if we receive
233 root 1.78 spurious notifications or unwanted events. this is very costly,
234     but I didn't come up with this horrible design.
235 root 1.71 - use memset to initialise most arrays now and do away with the
236     init functions.
237 root 1.72 - expand time-out strategies into a "Be smart about timeouts" section.
238     - drop the "struct" from all ev_watcher declarations in the
239 root 1.73 documentation and did other clarifications (yeah, it was a mistake
240     to have a struct AND a function called ev_loop).
241 root 1.74 - fix a bug where ev_default would not initialise the default
242     loop again after it was destroyed with ev_default_destroy.
243 root 1.79 - rename syserr to ev_syserr to avoid name clashes when embedding,
244     do similar changes for event.c.
245 root 1.71
246 root 1.69 3.45 Tue Oct 21 21:59:26 CEST 2008
247 root 1.67 - disable inotify usage on linux <2.6.25, as it is broken
248     (reported by Yoann Vandoorselaere).
249 sf-exg 1.191 - ev_stat erroneously would try to add inotify watchers
250 root 1.68 even when inotify wasn't available (this should only
251 root 1.67 have a performance impact).
252 root 1.65 - ev_once now passes both timeout and io to the callback if both
253     occur concurrently, instead of giving timeouts precedence.
254 root 1.66 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
255 root 1.65
256 root 1.62 3.44 Mon Sep 29 05:18:39 CEST 2008
257     - embed watchers now automatically invoke ev_loop_fork on the
258     embedded loop when the parent loop forks.
259 root 1.58 - new function: ev_now_update (loop).
260 root 1.57 - verify_watcher was not marked static.
261 root 1.59 - improve the "associating..." manpage section.
262 root 1.60 - documentation tweaks here and there.
263 root 1.57
264 root 1.56 3.43 Sun Jul 6 05:34:41 CEST 2008
265 root 1.54 - include more include files on windows to get struct _stati64
266 root 1.56 (reported by Chris Hulbert, but doesn't quite fix his issue).
267 root 1.53 - add missing #include <io.h> in ev.c on windows (reported by
268     Matt Tolton).
269    
270 root 1.52 3.42 Tue Jun 17 12:12:07 CEST 2008
271 root 1.50 - work around yet another windows bug: FD_SET actually adds fd's
272     multiple times to the fd_*SET*, despite official MSN docs claiming
273 root 1.51 otherwise. Reported and well-analysed by Matt Tolton.
274     - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
275 root 1.48 (reported any analysed by Chris Hulbert).
276 root 1.49 - fix a bug in ev_ebadf (this function is only used to catch
277     programming errors in the libev user). reported by Matt Tolton.
278     - fix a bug in fd_intern on win32 (could lead to compile errors
279     under some circumstances, but would work correctly if it compiles).
280     reported by Matt Tolton.
281 root 1.50 - (try to) work around missing lstat on windows.
282 root 1.45 - pass in the write fd set as except fd set under windows. windows
283 root 1.46 is so uncontrollably lame that it requires this. this means that
284     switching off oobinline is not supported (but tcp/ip doesn't
285     have oob, so that would be stupid anyways.
286 root 1.47 - use posix module symbol to auto-detect monotonic clock presence
287     and some other default values.
288 root 1.45
289 root 1.44 3.41 Fri May 23 18:42:54 CEST 2008
290 root 1.46 - work around an obscure bug in winsocket select: if you
291 root 1.40 provide only empty fd sets then select returns WSAEINVAL. how sucky.
292 root 1.41 - improve timer scheduling stability and reduce use of time_epsilon.
293 root 1.36 - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
294     codesize and makes for better cache-efficiency.
295     - use 3-based 4-heap for !EV_MINIMAL. this makes better use
296     of cpu cache lines and gives better growth behaviour than
297     2-based heaps.
298 root 1.38 - cache timestamp within heap for !EV_MINIMAL, to avoid random
299     memory accesses.
300     - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
301 root 1.33 - fix a potential aliasing issue in ev_timer_again.
302 root 1.35 - add/document ev_periodic_at, retract direct access to ->at.
303     - improve ev_stat docs.
304     - add portability requirements section.
305 root 1.39 - fix manpage headers etc.
306 root 1.40 - normalise WSA error codes to lower range on windows.
307 root 1.43 - add consistency check code that can be called automatically
308     or on demand to check for internal structures (ev_loop_verify).
309 root 1.31
310 root 1.30 3.31 Wed Apr 16 20:45:04 CEST 2008
311     - added last minute fix for ev_poll.c by Brandon Black.
312 root 1.29
313 root 1.28 3.3 Wed Apr 16 19:04:10 CEST 2008
314 root 1.23 - event_base_loopexit should return 0 on success
315     (W.C.A. Wijngaards).
316 root 1.20 - added linux eventfd support.
317     - try to autodetect epoll and inotify support
318     by libc header version if not using autoconf.
319 root 1.21 - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
320     - declare functions defined in ev.h as inline if
321     C99 or gcc are available.
322     - enable inlining with gcc versions 2 and 3.
323 root 1.25 - work around broken poll implementations potentially
324     not clearing revents field in ev_poll (Brandon Black)
325     (no such systems are known at this time).
326 root 1.23 - work around a bug in realloc on openbsd and darwin,
327 sf-exg 1.191 also makes the erroneous valgrind complaints
328 root 1.23 go away (noted by various people).
329 root 1.26 - fix ev_async_pending, add c++ wrapper for ev_async
330 sf-exg 1.191 (based on patch sent by Johannes Deisenhofer).
331 root 1.26 - add sensible set method to ev::embed.
332 root 1.27 - made integer constants type int in ev.h.
333 root 1.20
334 root 1.19 3.2 Wed Apr 2 17:11:19 CEST 2008
335 root 1.15 - fix a 64 bit overflow issue in the select backend,
336     by using fd_mask instead of int for the mask.
337 root 1.16 - rename internal sighandler to avoid clash with very old perls.
338 root 1.18 - entering ev_loop will not clear the ONESHOT or NONBLOCKING
339     flags of any outer loops anymore.
340 root 1.17 - add ev_async_pending.
341 root 1.15
342 root 1.14 3.1 Thu Mar 13 13:45:22 CET 2008
343 root 1.12 - implement ev_async watchers.
344 root 1.10 - only initialise signal pipe on demand.
345     - make use of sig_atomic_t configurable.
346 root 1.14 - improved documentation.
347 root 1.10
348 root 1.9 3.0 Mon Jan 28 13:14:47 CET 2008
349 root 1.6 - API/ABI bump to version 3.0.
350 root 1.4 - ev++.h includes "ev.h" by default now, not <ev.h>.
351     - slightly improved documentation.
352 root 1.5 - speed up signal detection after a fork.
353 root 1.6 - only optionally return trace status changed in ev_child
354     watchers.
355 root 1.8 - experimental (and undocumented) loop wrappers for ev++.h.
356 root 1.4
357 root 1.2 2.01 Tue Dec 25 08:04:41 CET 2007
358 root 1.3 - separate Changes file.
359 root 1.2 - fix ev_path_set => ev_stat_set typo.
360     - remove event_compat.h from the libev tarball.
361     - change how include files are found.
362     - doc updates.
363     - update licenses, explicitly allow for GPL relicensing.
364    
365     2.0 Sat Dec 22 17:47:03 CET 2007
366     - new ev_sleep, ev_set_(io|timeout)_collect_interval.
367     - removed epoll from embeddable fd set.
368     - fix embed watchers.
369     - renamed ev_embed.loop to other.
370     - added exported Symbol tables.
371     - undefine member wrapper macros at the end of ev.c.
372     - respect EV_H in ev++.h.
373    
374     1.86 Tue Dec 18 02:36:57 CET 2007
375     - fix memleak on loop destroy (not relevant for perl).
376    
377     1.85 Fri Dec 14 20:32:40 CET 2007
378     - fix some aliasing issues w.r.t. timers and periodics
379     (not relevant for perl).
380    
381     (for historic versions refer to EV/Changes, found in the Perl interface)
382    
383 root 1.1 0.1 Wed Oct 31 21:31:48 CET 2007
384     - original version; hacked together in <24h.
385