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Revision: 1.196
Committed: Thu Oct 2 15:11:01 2008 UTC (15 years, 7 months ago) by root
Branch: MAIN
Changes since 1.195: +2 -0 lines
Log Message:
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File Contents

# User Rev Content
1 root 1.1 Revision history for Perl extension AnyEvent.
2    
3 root 1.191 4.3
4 root 1.196 - AnyEvent will now install a no-op signal handler for SIGPIPE,
5     unless one has been installed already.
6 root 1.193 - fixed a great number of bugs and corner cases in AnyEvent::Handle:
7     - fix a bug in where in SSL connect mode, the
8 root 1.191 client would first wait for some data by the server and
9     otherwise hang. (Reported and analyzed in an absolutely
10     exemplary manner by Adam Rosenstein).
11 root 1.193 - fix a bug in where SSL EOF would not be treated
12 root 1.191 as stream EOF, putting the connection into a hung state.
13     (Reported and analyzed in an absolutely exemplary manner by Adam
14     Rosenstein).
15 root 1.193 - fix a potential segfault when the TLS context
16 root 1.191 would go missing in a read callback (e.g. due to stoptls) -
17     Net::SSLeay of course makes no type checking whatsoever.
18 root 1.192 - AnyEvent::Handle will not stop the read watcher in TLS mode.
19     - AnyEvent::Handle->stoptls will send a TLS close notify
20     instead of simply destroying the stream now.
21 root 1.195 - fix a bug where large blocks of data written in TLS mode
22     would not be sent unless triggered by receives.
23 root 1.193 - on_drain will now take the tls write buffer into account.
24     - SSL operations have been streamlined a bit and should be faster
25     now, more to come, though.
26 root 1.194 - added a FAQ section, will document nontrivial issues in there.
27 root 1.191
28 root 1.190 4.234 Mon Sep 29 04:08:13 CEST 2008
29 root 1.189 - fix child watcher documentation: only child exits will be reported,
30     no trace events.
31 root 1.190 - mention SIGPIPE in AnyEvent::Handle.
32     - perl backend will now use POSIX::times as monotonic clock
33 root 1.188 when available and the monotonic clock option is not.
34 root 1.187 - run even without Time::HiRes in some cases now, but do not
35 root 1.190 provide sub-second accuracy (all *supported* perl versions have
36 root 1.187 Time::HiRes).
37    
38 root 1.186 4.233 Fri Aug 22 01:48:05 CEST 2008
39     - fix a bug in the testsuite, causing a hang.
40     - clarified lots of AnyEvent::Handle constructor arguments.
41    
42 root 1.185 4.232 Thu Aug 21 20:44:25 CEST 2008
43     - fix a bug in AnyEvent::Handle that could cause two fatal error
44     callbacks on EOF, which caused AnyEvent::HTTP to signal success twice
45     (testcase by Leon Brocard).
46     - clarified on_eof/on_error documentation a bit.
47    
48 root 1.184 4.231 Tue Jul 29 13:12:15 CEST 2008
49     - remove some debugging code left in AnyEvent::Util::fork_call
50     (and no, it's impossible to implement with the broken windows
51     perls without resource leaks or worse).
52    
53 root 1.183 4.23 Tue Jul 29 12:19:59 CEST 2008
54 root 1.177 - document the first parameter passed to condvar callbacks to be
55     the callback.
56 root 1.178 - add AnyEvent::Socket::{ntoa,aton} aliases.
57 root 1.180 - optimize the AE::Handle->push_read (line) for the default
58 root 1.179 eol marker.
59 root 1.180 - optimize push_read (packstring|storable) for small packets.
60 root 1.182 - invoke on_error callback when no on_eof callback is set.
61 root 1.180 - fix a bug in push_read (storable) of unknown impact.
62 root 1.177
63 root 1.176 4.22 Sun Jul 20 16:34:13 CEST 2008
64 root 1.174 - new function AnyEvent::Socket::parse_hostport.
65 root 1.175 - as the bulkheads at microsoft can't even get getprotobyname reliably
66     working on their shitty fucking broken os we need to hardcode
67     some common protocol numbers in AnyEvent::Socket. How can
68     people even bother with such a pile of shit as windows.
69 root 1.174
70 root 1.173 4.21 Thu Jul 17 14:40:05 CEST 2008
71 root 1.171 - INCOMPATIBLE CHANGE: AnyEvent::Util::fork_call now has a prototype
72     which is incompatible to previous invocation syntax.
73 root 1.172 - work around more windows perl bugs in fork_call. I cannot imagine
74     why anybody would bother implementing fork in such an obviously
75     unusable way.
76     - avoid calling $do_retry if the request has already finished in
77     AnyEvent::DNS, thus avoiding an exception (reported by Anatoly
78     K. Sharifulin).
79 root 1.170
80 root 1.169 4.2 Sat Jul 12 22:42:11 CEST 2008
81 root 1.165 - support an "interval" argument for repeating timers.
82 root 1.164 - fix a bug in the pure perl event loop that caused timers to
83     be delayed under some circumstances.
84 root 1.167 - implement optional argument checking via PERL_ANYEVENT_STRICT.
85 root 1.169 - not importing anything from Event causes it to malfunction
86     and not use Time::HiRes, work around this bug.
87     - more bug workarounds against the endlessly broken Tk module,
88 root 1.168 seems to work now on 32 bit machines, but less so on 64 bit.
89 root 1.164 - minor optimisations applied to most backends.
90    
91 root 1.163 4.161 Fri Jul 4 14:24:48 CEST 2008
92 elmex 1.162 - fixed the t/handle/02_write.t, it read after write, with the
93 root 1.163 assumption that all data could be written before read
94     (reported by Jim Razmus).
95 elmex 1.162
96 root 1.161 4.160 Thu Jul 3 04:02:21 CEST 2008
97 root 1.160 - re-registering signal watchers after unregistering one did
98     not work if a backend falls back on AnyEvent's default
99     implementation (also affected child watchers).
100 root 1.159 - new AnyEvent::Handle options: autocork and no_delay.
101    
102 root 1.158 4.152 Sun Jun 22 14:15:44 CEST 2008
103 root 1.159 - allow for 32-bit perls that implement shifts differently
104     on different architectures in parse_ipv4 (reported and
105 root 1.158 analysed by Keiichi DAIBA).
106    
107 root 1.157 4.151 Fri Jun 6 17:34:24 CEST 2008
108     - make sure specifying _only_ on_read and never pushing reads
109     works.
110    
111 root 1.155 4.15 Fri Jun 6 13:00:46 CEST 2008
112 root 1.154 - the pure perl backend would keep some watchers alive when more than
113     one watcher was registered for the same fd.
114 root 1.155 - new "packstring" and "storable" read and write types
115     for AnyEvent::Handle.
116 root 1.156 - allow on_eof handler to be called after on_error with EPIPE returns.
117 root 1.153 - do not immediately call on_read callback in handle constructor.
118    
119 root 1.152 4.14 Thu Jun 5 20:29:31 CEST 2008
120 elmex 1.149 - Fixed a bug in DNS SRV priority sorting.
121 root 1.150 - AnyEvent::Util::guard now reports runtime errors while
122     executing the guard block as warnings.
123 root 1.152 - handle 0-byte-reads just before EOF correctly in AnyEvent::Handle.
124 elmex 1.149
125 root 1.148 4.13 Thu Jun 5 00:47:59 CEST 2008
126 root 1.146 - AnyEvent::DNS only followed cname chains with length 2,
127     contrary to documentation. bumped it up to 10, thanks to
128     microsoft, the current broken-dns-config-king.
129 root 1.147 - AnyEvent::DNS didn't check for socket return status
130     but instead relied on perl not creating filehandles in that
131     case - too bad it gives you a bogus file handle (reported
132     and analysed by Vladimir Timofeev).
133 root 1.145 - fix queue management logic in AnyEvent::Handle:
134     when on_read was registered, the queue was empty
135     and no progress could be made AnyEvent::Handle would
136     enter an endless loop.
137     - correctly start reading again when the handle became
138     busy again after idling.
139 root 1.146 - correctly treat tls shut-downs as EOF condition
140     (for the time being, would be nice to have a callback for that).
141 root 1.145 - correctly call eof callback under all conditions
142     (hopefully).
143 root 1.146 - the timeout callback did not expect that $self can go
144     away any time.
145 root 1.145
146 root 1.144 4.12 Tue Jun 3 10:58:04 CEST 2008
147     - include AnyEvent::Intro, a tutorial for anyevent,
148     anyevent::socket and anyevent::handle.
149 root 1.143 - allow more options in on_error.
150 root 1.142
151 root 1.141 4.11 Fri May 30 23:42:25 CEST 2008
152 root 1.135 - INCOMPATIBLE CHANGE: replace ptr by real PTR lookup, provide
153     reverse_lookup and reverse_verify to replace it, support
154     v4mapped and v4compat addresses.
155 root 1.129 - provide more documentation for the resolver class.
156 root 1.130 - really replace longest run of :0: by :: in format_address,
157     also properly convert :: and ::1 again.
158 root 1.134 - support NAPTR record name and decode it.
159 root 1.133 - implement random weight sampling for SRV records, as per
160     rfc 2782.
161 root 1.137 - correctly abort on srv-record targets of ".".
162     - added AnyEvent::DNS::wait_for_slot.
163 root 1.138 - in the unlikely event of a virtual circuit connection
164     being invalidated by a delayed udp reply, AnyEvent::DNS
165     could die. this has been fixed.
166     - plug a probable memleak in the DNS vc code.
167     - use configured timeout also for VC request phase.
168 root 1.139 - implement timeout and max_outstanding methods
169     for resolver class.
170 root 1.140 - update version numbers in all modules.
171 root 1.129
172 root 1.128 4.1 Thu May 29 05:45:40 CEST 2008
173 root 1.123 - INCOMPATIBLE CHANGE: renamed xxx_ip functions to xxx_address
174     which mirrors their purpose better (old names still available
175     for a while). Also moved AnyEvent::DNS::addr to
176     AnyEvent::Socket::resolve_sockaddr.
177 root 1.127 - implement AnyEvent->time and AnyEvent->now.
178 root 1.124 - fix IPv6 support in pack_sockaddr.
179 root 1.123 - officially un-experimentalise all newly introduced code.
180     - support unix domain sockets everywhere by specifying
181     a host of "unix/" and the pathname as service.
182 root 1.126 - implement an activity timeout in AnyEvent::Handle.
183 root 1.122 - added a regex read type to AnyEvent::Handle.
184     - added a json read/write type to AnyEvent::Handle.
185 root 1.118 - always croak in on_error in AnyEvent::Handle.
186     - document how to subclass AnyEvent::Handle.
187 root 1.120 - implement AnyEvent::Util::fork_call.
188 root 1.127 - add support for IPv6 nameservers and nameserver statements.
189 root 1.121 - work around _yet_ _another_ windows perl bug in where empty
190     select masks cause errors in the pure perl backend (this
191     workaround cannot be implemented for the other event loops,
192     but EV also works around this).
193 root 1.123 - supply AnyEvent::Socket::address_type and make good use of it.
194 root 1.122 - clarify and fix the Handle documentation w.r.t $self vs. $handle
195     vs. callback arguments.
196 root 1.127 - add some recommends to the META.yml.
197 root 1.117
198 root 1.116 4.05 Mon May 26 19:44:06 CEST 2008
199     - some platforms ignore the rfc and prepend an extra sa_len member to
200     the sockaddr structure, cater for those. also use sockaddr_family,
201     didn't know it was there, but comes in handy for the workaround.
202 root 1.114 - undo the import WIN32 hack.
203    
204 root 1.113 4.04 Mon May 26 08:03:31 CEST 2008
205 root 1.109 - try to work around yet another windows bug: failed connects are reported
206 root 1.110 as if it were out-of-band data. windows users: you suck. Only
207     EV, Glib, Event and the pure perl backend can handle this condition.
208 root 1.111 - optimize write algorithm in AnyEvent::Handle.
209 root 1.106 - properly parse PERL_ANYEVENT_PROTOCOLS and use the info correctly.
210 root 1.112 - tcp_connect now properly iterates through all targets.
211 root 1.104 - check wether IPv6 sockets can actually be created, otherwise, disable ipv6
212 root 1.114 support entirely. also hardcode some AF_INET6 constants for the
213 root 1.107 sake of perl 5.8.
214 root 1.106 - vastly improved nameserver/suffix detection algorithm for windows
215     (still a hack...)
216     - try to use a fallback dns server if no dns servers could be found.
217 root 1.108 - splatter around some local $SIG{__DIE__}'s to work around bad
218     die handlers.
219 root 1.104
220 root 1.102 4.03 Sun May 25 05:05:57 CEST 2008
221 root 1.100 - work around perl bugs on windows, where perl returns undocumented
222     error codes for sysread, syswrite etc.
223 root 1.96 - fix AnyEvent::Handle::unshift_read to really unshift and not push.
224 root 1.97 - AnyEvent::Handle could sometimes stumble over 0-byte writes.
225 root 1.101 - fix unpack_sockaddr, now works for AF_INET6 sockaddr's.
226 root 1.100 - updated documentation.
227 root 1.103 - lots of workarounds for perl 5.8 quirks.
228 root 1.98 - implement a more flexible type system for both reads and writes
229     in AnyEvent::Handle.
230 root 1.101 - support IPv6 in tcp_server.
231     - pass local hostname and port to the prepare callback in tcp_server.
232 root 1.99 - make types extendable in AnyEvent::Handle.
233 root 1.100 - croak, not die, in AnyEvent::Handle;
234 root 1.96
235 root 1.95 4.0 Sat May 24 19:58:08 CEST 2008
236 root 1.88 - added (experimental) AnyEvent::DNS module.
237     - added (experimental) AnyEvent::Socket module.
238 root 1.93 - added (experiemntal) support for TLS/SSL in AnyEvent::Handle.
239 root 1.90 - make condvar->end call ->send as documented.
240     - make condvar constructor support the documented cb => argument.
241 root 1.94 - overload condvars so you can use them instead of code references.
242 root 1.93 - support more of the POSIX forms instead of a pure dotted quad for
243 root 1.89 verbatim ip addresses.
244 root 1.88 - AnyEvent::Socket::inet_aton will use AnyEvent::DNS now and not fork anymore.
245 root 1.87 - try very hard not to freeze on broken windows perls.
246 root 1.86 - make on_eof optional in AnyEvent::Handle.
247 root 1.83 - support service names in tcp_connect and tcp_server.
248 root 1.84 - work around netbsd/openbsd bug causing unix sockets not to
249 root 1.121 become writable until empty.
250 root 1.81 - only make a dummy read for error detection when getpeername
251     returns ENOTCONN.
252 root 1.181 - defend AnyEvent::Util::inet_aton against Coro::LWP's brutal
253 root 1.82 override.
254 root 1.91 - new AnyEvent::Guard::cancel.
255 root 1.81
256 root 1.80 3.5 Sat May 17 23:17:14 CEST 2008
257 root 1.79 - gracefully deal with systems not defining CLOCK_MONOTONIC
258     (as opposed to not supporting the clock itself, which worked in 3.41).
259 root 1.77 - added AnyEvent::Util::tcp_connect and AnyEvent::Util::tcp_server
260     helpers, to replace the ill-designed AnyEvent::Socket class.
261     - added some examples (eg/connect, eg/handle).
262     - added AnyEvent::Util::guard.
263     - AnyEvent::Util now exports most of its functions.
264 elmex 1.74 - fixed a bug in *_read_chunk, where the callback was called with $self as
265     first and second argument.
266 root 1.77 - simplified and fixed regex handling in AnyEvent::Handle::*_read_line.
267 root 1.72 - fix manpage condvars examples to use new syntax.
268 root 1.78 - considerably improve inet_aton with EV::ADNS backend to support
269     cname chains (common dns configuration bug, e.g. with www.google.de)
270     and aaaa records if no a record could be found.
271 root 1.72
272 root 1.71 3.41 Sun May 11 19:53:13 CEST 2008
273     - work around a bug in perl 5.8.8's local. Reported by Yi Ma Mao.
274    
275 root 1.70 3.4 Sun May 11 00:29:25 CEST 2008
276 root 1.181 - complete re-implementation of condvars with a hopefully much more useful
277 root 1.70 API (backward compatible functions exist but are undocumented).
278 root 1.69 - AnyEvent::Handle fully rewritten with a hopefully more powerful API
279     (still subject to change).
280 root 1.63 - take advantage of CLOCK_MONOTONIC, if available, in AnyEvent::Impl::Perl.
281 root 1.68 - provide AnyEvent::post_detect and @AnyEvent::post_detect, which
282 root 1.67 allows module authors to avoid forcing event loop detection.
283     (used by Coro::AIO, Coro::BDB, Coro::AnyEvent for example).
284 root 1.66 - remove coro backends: Coro now provides generic support for AnyEvent
285     via Coro::AnyEvent.
286 root 1.63
287 root 1.62 3.3 Mon Apr 28 09:51:06 CEST 2008
288     - added AnyEvent::Handle, AnyEvent::Socket and AnyEvent::Util modules.
289 root 1.55 - fix a bug in the pure perl backend that kept watchers alive
290     when multiple watchers were registered for the same fh/poll combo.
291 root 1.54 - add a benchmark section showing AnyEvent overhead and comparing
292     the different event loops with each other.
293 root 1.56 - prefer pure perl over tk when autoprobing, as it's about as fast,
294     but doesn't crash with many watchers.
295 root 1.62 - declare Qt support non-experimental.
296 root 1.56 - clarify the confusing section about the file descriptor being
297     kept alive.
298     - document the race between loading of an event module and
299     child processes exiting.
300 root 1.53 - support POE as "backend" (with some caveats, POE is not generic
301 root 1.54 enough, and darn slow).
302 root 1.53 - support Wx and Prima through POE.
303 root 1.60 - optimise perl backend to use 20% less memory and take advantage
304 root 1.62 of typical timeout behaviour. It can now compete with
305 root 1.60 select/poll-based C event loops in most cases (it is usually
306     faster than Event and Glib :).
307 root 1.59 - roughly cut EV memory use in half and increase its speed by 30%,
308 root 1.62 by removing undocumented functionality. Did something similar
309     to other event loops where possible.
310 root 1.53
311 root 1.50 3.2 Thu Apr 24 10:10:40 CEST 2008
312 root 1.51 - do not die when anyevent watchers are destroyed while running callbacks
313     in the pureperl backend (could only happen when two watchers are registered
314     for the same fh/poll combo).
315     - support autoloading for child watchers, was broken in all versions.
316 root 1.47 - implement PERL_ANYEVENT_MODEL env variable.
317 root 1.49 - (experimental) implement interface to the (very crashy/buggy) Event::Lib module.
318     - (experimental) implement interface to the Qt module (cannot be autoprobed).
319 root 1.52 - this release is IO:AnyEvent-proof.
320 root 1.47
321 root 1.46 3.12 Tue Apr 22 07:11:46 CEST 2008
322     - reinstate AUTHOR section that got lost somehow.
323     - do not hang in the testsuite with badly broken perls (activestate,
324     strawberry...), but instead diagnose the problem and continue.
325     - use INT instead of CHLD in an attempt to support broken windows perls
326     better (this decreases the test quality, unfortunately).
327     - do not send the signal to the process group
328     (no problem for CHLD, bad for INT :).
329    
330 root 1.45 3.11 Sat Apr 19 06:57:31 CEST 2008
331     - major documentation rework.
332     - document the fact that child watchers only watch for zombies.
333     - fix the child watcher example.
334    
335 root 1.43 3.1 Wed Apr 16 17:09:01 CEST 2008
336 root 1.40 - work around recurring bugs in Tk by dup'ing filehandles, the
337 root 1.43 only method with good success chances on Tk (the bugs apparently
338     don't get fixed anytime soon).
339 root 1.42 - lift the restriction of only one watcher per fh direction
340     (as the Tk bug workaround also lifts it and only Tk imposed
341     such strong limits).
342 root 1.41 - changed probe order to prefer coro adaptors.
343     - explain why recursion into the event loop is not supported
344     unless the backend supports it (only Coro::EV does without
345     any restrictions...).
346     - add simple manpages for all backend modules.
347 root 1.40
348 root 1.39 3.0 Mon Apr 7 21:30:23 CEST 2008
349 root 1.38 - Coro::Signal changed semantics, roll our own, also cleaning
350     up the Coro implementation in general.
351     - rename Coro backend to CoroEvent.
352     - add some decision helping paragraph to the manpage that should
353 root 1.44 help people to decide whether AnyEvent is the right thing for them.
354 root 1.38
355 root 1.37 2.9 Mon Jan 28 13:31:54 CET 2008
356     - update for EV 3.0 API changes.
357    
358 root 1.36 2.8 Sun Nov 25 15:06:03 CET 2007
359     - waitpid can validly return 0. accept this fact of life
360     instead of reporting it to any watchers.
361    
362 root 1.35 2.7 Fri Nov 23 11:41:14 CET 2007
363 root 1.34 - force use of AnyEvent::Impl::Perl in testsuite, there is
364     too much breakage outside AnyEvent.
365 root 1.35 - deliver signals synchronously in AnyEvent::Impl::Perl
366     or any other event loop that relies on AnyEvents child
367     watcher emulation. *Could* help with hanging testsuite
368     (except when Event or EV are installed).
369 root 1.34
370 root 1.33 2.6 Fri Nov 9 20:36:35 CET 2007
371 root 1.32 - fix bug in testsuite.
372     - move EV adaptor modules to AnyEvent.
373     - add Coro+EV adaptor module.
374 root 1.26
375 root 1.31 2.55 Tue Nov 6 17:41:32 CET 2007
376 root 1.27 - add EV to the list of supported event models.
377 root 1.30 - do not auto-reset pid watchers, pass pid and status to them.
378 root 1.29 - allow a pid of zero to watch for all children in child watchers.
379 root 1.27
380 root 1.25 2.54 Wed Jul 18 17:36:23 CEST 2007
381     - work around a perl bug that results in
382     BEGIN not safe after errors--compilation aborted without
383     any discernible reason or error message by once
384     again not use'ing strict.
385    
386 root 1.24 2.53 Sun Jul 8 10:51:53 CEST 2007
387     - make Glib interface work again (spotted by elmex).
388    
389 root 1.22 2.52 Wed Mar 7 18:36:16 CET 2007
390     - child watchers stopped working permanently when
391 root 1.23 all current child watchers were destroyed.
392 root 1.22
393 root 1.21 2.51 Mon Dec 11 21:33:24 CET 2006
394     - work around bugs in perl where eval "require Module" returns
395     true even if the module couldn't be loaded :/.
396    
397 root 1.20 2.5 Mon Dec 11 02:15:28 CET 2006
398 root 1.19 - avoid $AUTOLOAD because many perls corrupt it.
399 root 1.20 - AnyEvent::detect forces autodetection.
400     - implement signal watchers (experimental)
401     (Tk does not support async signals (<= 804.027 at least),
402     so they might get delayed indefinitely on Tk).
403     - implement child watchers (experimental).
404     - moved default condvar implementation into base module, simplifying
405     most implementation modules.
406 root 1.14
407 root 1.18 2.1 Fri Nov 24 15:50:48 CET 2006
408 root 1.16 - better docs.
409     - simple testsuite.
410 root 1.17 - added AnyEvent->one_event method for special purposes.
411 root 1.16
412 root 1.15 2.0 Wed Nov 1 02:21:30 CET 2006
413 root 1.13 - INCOMPATIBLE CHANGE: poll can now either be "r" or "w" but not both.
414     - INCOMPATIBLE CHANGE: io watcher callbacks have no arguments anymore.
415     - EXPERIMENTAL:
416     new pure-perl model added, AnyEvent now always finds a suitable
417     event model.
418 root 1.12 - improved documentation.
419     - reduced cpu overhead.
420    
421 root 1.11 1.02 Fri Jan 13 14:15:40 CET 2006
422     - add COPYING to clarify license.
423    
424 root 1.10 1.01 Sun Jan 8 05:48:09 CET 2006
425     - correctly cancel Event timers, avoid memory leaks.
426    
427 root 1.9 1.0 Sun Jan 8 05:40:58 CET 2006
428 root 1.8 - allow third-party interfaces to be added at runtime.
429     - fix version number.
430    
431 root 1.7 0.9 Fri Dec 30 02:25:41 CET 2005
432 root 1.6 - fixed errors in the documentation.
433 root 1.7 - going back to using $VERSION as "load check",
434     as suggested by Jörn Reder. Let's see why I stopped using
435     this method.
436     - add 'hup' to the list of events to receive for glib
437     and generate 'rw' events for it, as some versions of
438     glib seem to require this, while this breaks other
439     (older) versions of glib.
440     - implemented PERL_ANYEVENT_VERBOSE env variable.
441 root 1.6
442 root 1.5 0.3 Sun Dec 4 10:43:33 CET 2005
443     - no changes to the code.
444     - fixed documentation.
445     - clarified some corner cases.
446     - vastly improved documentation with a long example.
447    
448 root 1.3 0.2 Thu Dec 1 22:18:49 CET 2005
449 root 1.44 - check whether a valid method was called, to avoid endless loops.
450 root 1.4 - move condvars into their own class (cleaner, safer).
451     - don't die when some modules are not available.
452     - Tk is too broken to allow for words. Will work once Tk works.
453 root 1.3
454 root 1.2 0.1 Thu Dec 1 19:44:57 CET 2005
455     - spiced up and cleaned up for release.
456    
457 root 1.1 0.01 Tue Sep 21 18:12:09 CEST 2004
458     - original version; copied from Convert::Scalar.
459