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Revision: 1.169
Committed: Tue Mar 16 20:32:20 2010 UTC (14 years, 2 months ago) by root
Branch: MAIN
Changes since 1.168: +1 -0 lines
Log Message:
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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 1.166 TODO: ABI??? API????? Changes???
4 root 1.168 TODO: win32 write() to socket for signal handling
5 root 1.169 TODO: ev_loop_xx => ev_xx
6 root 1.161 - ev_embed_stop did not correctly stop the watcher (very good
7     testcase by Vladimir Timofeev).
8 root 1.164 - applied win32 fixes by Michael Lenaghan (also James Mansion).
9 root 1.166 - replace EV_MINIMAL by EV_FEATURES.
10 root 1.158 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
11 root 1.159 - configure now prepends -O3, not appends it, so one can still
12     override it.
13 root 1.160 - disable poll backend on AIX, the poll header spams the namespace
14     and it's not worth working around dead platforms (reported
15     and analyzed by Aivars Kalvans).
16 root 1.162 - improve header file compatibility of the standalone eventfd code
17     in an obscure case.
18 root 1.163 - implement EV_AVOID_STDIO option.
19     - do not use sscanf to parse linux version number (smaller, faster,
20     no sscanf dependency).
21 root 1.164 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
22 root 1.167 - update libev.m4 HAVE_CLOCK_SYSCALL test for newwer glibcs.
23 root 1.165 - add section on accept() problems to the manpage.
24 root 1.168 - rename EV_TIMEOUT to EV_TIMER.
25     - switch to two-digit minor version.
26 root 1.157
27 root 1.156 3.9 Thu Dec 31 07:59:59 CET 2009
28 root 1.155 - signalfd is no longer used by default and has to be requested
29     explicitly - this means that easy to catch bugs become hard to
30     catch race conditions, but the users have spoken.
31     - point out the unspecified signal mask in the documentation, and
32     that this is a race condition regardless of EV_SIGNALFD.
33 root 1.142 - backport inotify code to C89.
34 root 1.148 - inotify file descriptors could leak into child processes.
35 root 1.151 - ev_stat watchers could keep an errornous extra ref on the loop,
36     preventing exit when unregistering all watchers (testcases
37 root 1.150 provided by ry@tinyclouds.org).
38 root 1.143 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
39 root 1.145 symbols to make it easier for apps to do their own fd management.
40 root 1.144 - support EV_IDLE_ENABLE being disabled in ev++.h
41     (patch by Didier Spezia).
42 root 1.147 - take advantage of inotify_init1, if available, to set cloexec/nonblock
43     on fd creation, to avoid races.
44 root 1.150 - the signal handling pipe wasn't always initialised under windows
45     (analysed by lekma).
46 root 1.146 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
47     signalfd.
48 root 1.152 - add missing string.h include (Denis F. Latypoff).
49 root 1.153 - only replace ev_stat.prev when we detect an actual difference,
50     so prev is (almost) always different to attr. this might
51     have caused the probems with 04_stat.t.
52 root 1.154 - add ev::timer->remaining () method to C++ API.
53 root 1.142
54 root 1.141 3.8 Sun Aug 9 14:30:45 CEST 2009
55 root 1.133 - incompatible change: do not necessarily reset signal handler
56     to SIG_DFL when a sighandler is stopped.
57 root 1.135 - ev_default_destroy did not properly free or zero some members,
58 root 1.134 potentially causing crashes and memory corruption on repated
59     ev_default_destroy/ev_default_loop calls.
60 root 1.133 - take advantage of signalfd on GNU/Linux systems.
61     - document that the signal mask might be in an unspecified
62     state when using libev's signal handling.
63 root 1.136 - take advantage of some GNU/Linux calls to set cloexec/nonblock
64     on fd creation, to avoid race conditions.
65 root 1.132
66 root 1.131 3.7 Fri Jul 17 16:36:32 CEST 2009
67 root 1.128 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
68     instead of using a per-loop variable (bug caught by accident...).
69     - the ev_set_io_collect_interval interpretation has changed.
70     - add new functionality: ev_set_userdata, ev_userdata,
71 root 1.126 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
72 root 1.132 ev_invoke_pending, ev_pending_count, together with a long example
73     about thread locking.
74 root 1.128 - add ev_timer_remaining (as requested by Denis F. Latypoff).
75     - add ev_loop_depth.
76 root 1.124 - calling ev_unloop in fork/prepare watchers will no longer poll
77     for new events.
78 root 1.115 - Denis F. Latypoff corrected many typos in example code snippets.
79     - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
80     check that the syscall number is available before trying to
81     use it (reported by ry@tinyclouds).
82 root 1.117 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
83 root 1.116 slightly higher accuracy.
84 root 1.122 - properly declare ev_loop_verify and ev_now_update even when
85     !EV_MULTIPLICITY.
86 root 1.121 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
87 root 1.123 - support EV_MINIMAL==2 for a reduced API.
88 root 1.125 - actually 0-initialise struct sigaction when installing signals.
89 root 1.127 - add section on hibernate and stopped processes to ev_timer docs.
90 root 1.115
91 root 1.113 3.6 Tue Apr 28 02:49:30 CEST 2009
92 root 1.107 - multiple timers becoming ready within an event loop iteration
93     will be invoked in the "correct" order now.
94 root 1.105 - do not leave the event loop early just because we have no active
95     watchers, fixing a problem when embedding a kqueue loop
96     that has active kernel events but no registered watchers
97     (reported by blacksand blacksand).
98 root 1.102 - correctly zero the idx values for arrays, so destroying and
99     reinitialising the default loop actually works (patch by
100     Malek Hadj-Ali).
101 root 1.108 - implement ev_suspend and ev_resume.
102 root 1.106 - new EV_CUSTOM revents flag for use by applications.
103 root 1.109 - add documentation section about priorites.
104     - add a glossary to the dcoumentation.
105 root 1.111 - extend the ev_fork description slightly.
106 root 1.112 - optimize a jump out of call_pending.
107 root 1.102
108 root 1.101 3.53 Sun Feb 15 02:38:20 CET 2009
109     - fix a bug in event pipe creation on win32 that would cause a
110     failed assertion on event loop creation (patch by Malek Hadj-Ali).
111 root 1.100 - probe for CLOCK_REALTIME support at runtime as well and fall
112     back to gettimeofday if there is an error, to support older
113     operating systems with newer header files/libraries.
114     - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
115     (default most everywhere), otherwise not.
116    
117 root 1.99 3.52 Wed Jan 7 21:43:02 CET 2009
118 root 1.97 - fix compilation of select backend in fd_set mode when NFDBITS is
119     missing (to get it to compile on QNX, reported by Rodrigo Campos).
120     - better select-nfds handling when select backend is in fd_set mode.
121     - diagnose fd_set overruns when select backend is in fd_set mode.
122     - due to a thinko, instead of disabling everything but
123     select on the borked OS X platform, everything but select was
124     allowed (reported by Emanuele Giaquinta).
125 root 1.95 - actually verify that local and remote port are matching in
126     libev's socketpair emulation, which makes denial-of-service
127     attacks harder (but not impossible - it's windows). Make sure
128 root 1.96 it even works under vista, which thinks that getpeer/sockname
129     should return fantasy port numbers.
130 root 1.100 - include "libev" in all assertion messages for potentially
131 root 1.97 clearer diagnostics.
132 root 1.98 - event_get_version (libevent compatibility) returned
133     a useless string instead of the expected version string
134     (patch by W.C.A. Wijngaards).
135 root 1.95
136 root 1.94 3.51 Wed Dec 24 23:00:11 CET 2008
137 root 1.91 - fix a bug where an inotify watcher was added twice, causing
138 root 1.92 freezes on hash collisions (reported and analysed by Graham Leggett).
139 root 1.87 - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
140     a direct syscall - slower, but no dependency on librt et al.
141 root 1.88 - assume negative return values != -1 signals success of port_getn
142     (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
143     (no known failure reports, but it doesn't hurt).
144 root 1.93 - fork detection in ev_embed now stops and restarts the watcher
145     automatically.
146 root 1.89 - EXPERIMENTAL: default the method to operator () in ev++.h,
147     to make it nicer to use functors (requested by Benedek László).
148     - fixed const object callbacks in ev++.h.
149 root 1.90 - replaced loop_ref argument of watcher.set (loop) by a direct
150     ev_loop * in ev++.h, to avoid clashes with functor patch.
151 root 1.91 - do not try to watch the empty string via inotify.
152 root 1.92 - inotify watchers could be leaked under certain circumstances.
153     - OS X 10.5 is actually even more broken than earlier versions,
154     so fall back to select on that piece of garbage.
155 root 1.93 - fixed some weirdness in the ev_embed documentation.
156 root 1.87
157 root 1.86 3.49 Wed Nov 19 11:26:53 CET 2008
158 root 1.83 - ev_stat watchers will now use inotify as a mere hint on
159     kernels <2.6.25, or if the filesystem is not in the
160     "known to be good" list.
161 root 1.84 - better mingw32 compatibility (it's not as borked as native win32)
162     (analysed by Roger Pack).
163 root 1.85 - include stdio.h in the example program, as too many people are
164     confused by the weird C language otherwise. I guess the next thing
165     I get told is that the "..." ellipses in the examples don't compile
166     with their C compiler.
167 root 1.83
168 root 1.80 3.48 Thu Oct 30 09:02:37 CET 2008
169 root 1.71 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
170     backend by assuming the kernel event mask hasn't changed if
171     ADD fails with EEXIST.
172 root 1.75 - work around spurious event notification bugs in epoll by using
173 root 1.77 a 32-bit generation counter. recreate kernel state if we receive
174 root 1.78 spurious notifications or unwanted events. this is very costly,
175     but I didn't come up with this horrible design.
176 root 1.71 - use memset to initialise most arrays now and do away with the
177     init functions.
178 root 1.72 - expand time-out strategies into a "Be smart about timeouts" section.
179     - drop the "struct" from all ev_watcher declarations in the
180 root 1.73 documentation and did other clarifications (yeah, it was a mistake
181     to have a struct AND a function called ev_loop).
182 root 1.74 - fix a bug where ev_default would not initialise the default
183     loop again after it was destroyed with ev_default_destroy.
184 root 1.79 - rename syserr to ev_syserr to avoid name clashes when embedding,
185     do similar changes for event.c.
186 root 1.71
187 root 1.69 3.45 Tue Oct 21 21:59:26 CEST 2008
188 root 1.67 - disable inotify usage on linux <2.6.25, as it is broken
189     (reported by Yoann Vandoorselaere).
190     - ev_stat errornously would try to add inotify watchers
191 root 1.68 even when inotify wasn't available (this should only
192 root 1.67 have a performance impact).
193 root 1.65 - ev_once now passes both timeout and io to the callback if both
194     occur concurrently, instead of giving timeouts precedence.
195 root 1.66 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
196 root 1.65
197 root 1.62 3.44 Mon Sep 29 05:18:39 CEST 2008
198     - embed watchers now automatically invoke ev_loop_fork on the
199     embedded loop when the parent loop forks.
200 root 1.58 - new function: ev_now_update (loop).
201 root 1.57 - verify_watcher was not marked static.
202 root 1.59 - improve the "associating..." manpage section.
203 root 1.60 - documentation tweaks here and there.
204 root 1.57
205 root 1.56 3.43 Sun Jul 6 05:34:41 CEST 2008
206 root 1.54 - include more include files on windows to get struct _stati64
207 root 1.56 (reported by Chris Hulbert, but doesn't quite fix his issue).
208 root 1.53 - add missing #include <io.h> in ev.c on windows (reported by
209     Matt Tolton).
210    
211 root 1.52 3.42 Tue Jun 17 12:12:07 CEST 2008
212 root 1.50 - work around yet another windows bug: FD_SET actually adds fd's
213     multiple times to the fd_*SET*, despite official MSN docs claiming
214 root 1.51 otherwise. Reported and well-analysed by Matt Tolton.
215     - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
216 root 1.48 (reported any analysed by Chris Hulbert).
217 root 1.49 - fix a bug in ev_ebadf (this function is only used to catch
218     programming errors in the libev user). reported by Matt Tolton.
219     - fix a bug in fd_intern on win32 (could lead to compile errors
220     under some circumstances, but would work correctly if it compiles).
221     reported by Matt Tolton.
222 root 1.50 - (try to) work around missing lstat on windows.
223 root 1.45 - pass in the write fd set as except fd set under windows. windows
224 root 1.46 is so uncontrollably lame that it requires this. this means that
225     switching off oobinline is not supported (but tcp/ip doesn't
226     have oob, so that would be stupid anyways.
227 root 1.47 - use posix module symbol to auto-detect monotonic clock presence
228     and some other default values.
229 root 1.45
230 root 1.44 3.41 Fri May 23 18:42:54 CEST 2008
231 root 1.46 - work around an obscure bug in winsocket select: if you
232 root 1.40 provide only empty fd sets then select returns WSAEINVAL. how sucky.
233 root 1.41 - improve timer scheduling stability and reduce use of time_epsilon.
234 root 1.36 - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
235     codesize and makes for better cache-efficiency.
236     - use 3-based 4-heap for !EV_MINIMAL. this makes better use
237     of cpu cache lines and gives better growth behaviour than
238     2-based heaps.
239 root 1.38 - cache timestamp within heap for !EV_MINIMAL, to avoid random
240     memory accesses.
241     - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
242 root 1.33 - fix a potential aliasing issue in ev_timer_again.
243 root 1.35 - add/document ev_periodic_at, retract direct access to ->at.
244     - improve ev_stat docs.
245     - add portability requirements section.
246 root 1.39 - fix manpage headers etc.
247 root 1.40 - normalise WSA error codes to lower range on windows.
248 root 1.43 - add consistency check code that can be called automatically
249     or on demand to check for internal structures (ev_loop_verify).
250 root 1.31
251 root 1.30 3.31 Wed Apr 16 20:45:04 CEST 2008
252     - added last minute fix for ev_poll.c by Brandon Black.
253 root 1.29
254 root 1.28 3.3 Wed Apr 16 19:04:10 CEST 2008
255 root 1.23 - event_base_loopexit should return 0 on success
256     (W.C.A. Wijngaards).
257 root 1.20 - added linux eventfd support.
258     - try to autodetect epoll and inotify support
259     by libc header version if not using autoconf.
260 root 1.21 - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
261     - declare functions defined in ev.h as inline if
262     C99 or gcc are available.
263     - enable inlining with gcc versions 2 and 3.
264 root 1.25 - work around broken poll implementations potentially
265     not clearing revents field in ev_poll (Brandon Black)
266     (no such systems are known at this time).
267 root 1.23 - work around a bug in realloc on openbsd and darwin,
268     also makes the errornous valgrind complaints
269     go away (noted by various people).
270 root 1.26 - fix ev_async_pending, add c++ wrapper for ev_async
271     (based on patch sent by Johannes Deisenhofer.
272     - add sensible set method to ev::embed.
273 root 1.27 - made integer constants type int in ev.h.
274 root 1.20
275 root 1.19 3.2 Wed Apr 2 17:11:19 CEST 2008
276 root 1.15 - fix a 64 bit overflow issue in the select backend,
277     by using fd_mask instead of int for the mask.
278 root 1.16 - rename internal sighandler to avoid clash with very old perls.
279 root 1.18 - entering ev_loop will not clear the ONESHOT or NONBLOCKING
280     flags of any outer loops anymore.
281 root 1.17 - add ev_async_pending.
282 root 1.15
283 root 1.14 3.1 Thu Mar 13 13:45:22 CET 2008
284 root 1.12 - implement ev_async watchers.
285 root 1.10 - only initialise signal pipe on demand.
286     - make use of sig_atomic_t configurable.
287 root 1.14 - improved documentation.
288 root 1.10
289 root 1.9 3.0 Mon Jan 28 13:14:47 CET 2008
290 root 1.6 - API/ABI bump to version 3.0.
291 root 1.4 - ev++.h includes "ev.h" by default now, not <ev.h>.
292     - slightly improved documentation.
293 root 1.5 - speed up signal detection after a fork.
294 root 1.6 - only optionally return trace status changed in ev_child
295     watchers.
296 root 1.8 - experimental (and undocumented) loop wrappers for ev++.h.
297 root 1.4
298 root 1.2 2.01 Tue Dec 25 08:04:41 CET 2007
299 root 1.3 - separate Changes file.
300 root 1.2 - fix ev_path_set => ev_stat_set typo.
301     - remove event_compat.h from the libev tarball.
302     - change how include files are found.
303     - doc updates.
304     - update licenses, explicitly allow for GPL relicensing.
305    
306     2.0 Sat Dec 22 17:47:03 CET 2007
307     - new ev_sleep, ev_set_(io|timeout)_collect_interval.
308     - removed epoll from embeddable fd set.
309     - fix embed watchers.
310     - renamed ev_embed.loop to other.
311     - added exported Symbol tables.
312     - undefine member wrapper macros at the end of ev.c.
313     - respect EV_H in ev++.h.
314    
315     1.86 Tue Dec 18 02:36:57 CET 2007
316     - fix memleak on loop destroy (not relevant for perl).
317    
318     1.85 Fri Dec 14 20:32:40 CET 2007
319     - fix some aliasing issues w.r.t. timers and periodics
320     (not relevant for perl).
321    
322     (for historic versions refer to EV/Changes, found in the Perl interface)
323    
324 root 1.1 0.1 Wed Oct 31 21:31:48 CET 2007
325     - original version; hacked together in <24h.
326