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Comparing Coro/Changes (file contents):
Revision 1.365 by root, Wed Jul 23 22:15:25 2008 UTC vs.
Revision 1.575 by root, Wed Jun 29 17:58:51 2011 UTC

1Revision history for Perl extension Coro. 1Revision history for Perl extension Coro.
2 2
3TODO: should explore PerlIO::via::CoroCede and PerlIO::via::CoroAIO. 3TODO: should explore PerlIO::coroaio (perl leaks like hell).
4TODO: maybe implement a default message channel, very much like Erlang's 4TODO: channel->maxsize(newsize)?
5 actor model (which is cool in a lot of important aspects (failures!), 5TODO: http://www.microsoft.com/msj/archive/s2ce.aspx
6 but very lacking in others (higher level ipc)). 6
76.0 Wed Jun 29 19:43:35 CEST 2011
8 - INCOMPATIBLE CHANGE: unreferenced coro objects will now be
9 destroyed and cleaned up automatically (e.g. async { schedule }).
10 - implement a JIT compiler for part of the thread switch code,
11 which gives a 50% speed improvement on threaded perls, and
12 about 4% on non-thraeded perls (so threaded perls now finally
13 reach about half the speed of non-threaded perls).
14 - slightly modernise Coro::Intro, add section about rouse functions.
15 - avoid DEFSV and ERRSV, giving another 10% improvement
16 in thread switching.
17 - Coro::State->is_destroyed is now called is_zombie.
18 - implement a Coro->safe_cancel method that might fail, but
19 cancels in a "safer" way if it succeeds.
20 - add preliminary support for DEBUGGING perls.
21 - get rid of two hash-accesses when initialising a new Coro - this
22 speeds up coro creation by almost a factor of two.
23 - croak when a coro that is being cancelled tries to block
24 (e.g. while executing a guard block), instead of crashing or
25 deadlocking.
26 - use a more robust and also faster method to identify Coro::State
27 objects - speeds up everything a bit.
28 - implement Coro->cancel in XS for a 20% speed improvement, and to
29 be able to implement mutual cancellation.
30 - speed up context switches by a percent or two by more efficiently
31 allocating context stack entries.
32 - implement Coro->join and Coro->on_destroy in XS for a speedup and
33 a reduction in memory use.
34 - cancelling a coro while it itself is cancelling another coro is
35 now supported and working, instead of triggering an assertion.
36 - be a bit more crash-resistant when calling (buggy) on_destroy
37 callbacks (best effort).
38 - move on_destroy into the slf_frame, to allow extension slf
39 functions to have destructors.
40 - get rid if coro refcounting - simply crash in other interpreter
41 threads by nulling the pointers on clone.
42 - simplify warn/die hook handling when loading Coro - the convoluted
43 logic seems to be no longer neccessary.
44 - use libecb instead of our own home-grown gcc hacks.
45 - document alternatives to Coro::LWP. Please use them :)
46 - work around another mindless idiotic NEEDLESS bug in openbsd/mirbsds
47 sigaltstack. Really. wine suffers from it, erlang suffers from it,
48 and it's known since at least 2006.
49
505.372 Wed Feb 23 06:14:30 CET 2011
51 - apparently mingw doesn't provide a working gettimeofday, try to
52 work around that by relying on Time::HiRes (indirectly brought to
53 my attention by Max Maischein).
54 - fix some portability issues when Time::HiRes was used.
55
565.371 Mon Feb 21 14:36:08 CET 2011
57 - backport to windows process emulation code again.
58
595.37 Sat Feb 19 07:49:44 CET 2011
60 - add a big "Coro thread life cycle" section to "man Coro".
61 - try a tentative workaround against the breakage that 5.13 has
62 introduced without depreciation period. sigh.
63 - no longer use Time::HiRes if gettimeofday is available, which
64 saves quite a lot of memory.
65
665.36 Sun Feb 13 05:33:41 CET 2011
67 - automatically load Coro::Channel, Coro::RWLock, Coro::Semaphore,
68 Coro::SemaphoreSet, Coro::Signal and Coro::Specific on first "new"
69 method call.
70 - undocument Coro::Timer::sleep and obsolete whole module.
71 - optimise Coro::Timer::timeout memory and cpu usage.
72 - slightly updated Coro::Intro for recent changes.
73 - do not initialise PL_dirty anymore.
74
755.25 Thu Nov 11 01:08:39 CET 2010
76 - try a different approach on netbsd - netbsd 5 finally has marginally
77 working pthreads, but still broken ucontext/sigaltstack.
78 - openbsd 4.8 finally got their act together, Coro works out of the box
79 with asm, setjmp and pthreads (no change, just informational).
80
815.24 Sat Oct 23 11:27:12 CEST 2010
82 - port to the EV 4.0 API.
83 - work around bugs in mingw32, making strawberry perl work
84 out of the box.
85 - correctly modify Coro::AIO function prototypes
86 so that they reflect the "no optional parameters" rule.
87 - "ported" libcoro to C++.
88
895.23 Mon May 17 18:50:42 CEST 2010
90 - be more resistant to ordering changes when initialising
91 Coro::AnyEvent, Coro::EV and Coro::Event (reported by Matthias
92 Waldorf).
93 - document that perl 5.12 deliberately removed support for cloning.
94
955.22 Wed Apr 14 03:55:35 CEST 2010
96 - correctly return udnef on errors in Coro::Handle::read/write
97 (testcase by Marc Mims).
98 - convert Coro::Util into a "perl compatibility wrapper" - the functions
99 are less useful now, but are drop-in replacements for existing
100 functions, listing better alternatives in the documentation. This also
101 fixes a bug in Coro::LWP which naively substituted Socket::inet_aton
102 with Coro::Util::inet_aton.
103 - do not override $Coro::idle unconditionally in Coro.pm, as other
104 modules could have provided their own idle coro already
105 (for exmaple, Coro::AnyEvent).
106 - fix Coro::Util::gethost* functions.
107 - Coro::Timer corretcly exports it's symbols (reported by Hideki Yamamura).
108
1095.21 Wed Dec 16 07:19:51 CET 2009
110 - automatically load Coro::AnyEvent when AnyEvent and Coro are used
111 together.
112 - add some examples on how to combine other event loops with Coro in
113 Coro::AnyEvent, and how to run it (and not to block). Seems to be
114 the most common source of confusion.
115 - try to catch people naively blocking in an event callback.
116 - work around the perl filehandle bug issue in conjunction with
117 older common::sense (as indirectly pointed out by ZSystem).
118 - clarify the "not from signal handlers" section.
119
1205.2 Sun Oct 4 14:54:24 CEST 2009
121 - Coro::Storable destroyed the prototypes of the functions it wrapped.
122 - export rouse_cb and rouse_wait by default now.
123 - fix various prototype mismatches in Coro::AnyEvent and Coro::Handle.
124 - new method $state->swap_sv.
125 - added section on "windows process emulation" to the manpage,
126 after a not-so-fruitful (nor-friendly) "discussion" with chip
127 salzenberg (discussion implies arguments, but his only arguments
128 were ad-hominems, one wonders why he started it in the first
129 place). I hope this explains it well enough for him to understand,
130 and maybe well enough for others to understand.
131 - use common::sense everywhere now.
132 - idle callbacks are no longer supported, use idle coros instead.
133 - print a thread listing when a deadlock is detected.
134
1355.17 Sat Aug 22 23:09:31 CEST 2009
136 - work around a bug in the perl debugger causing crashes
137 when running under the debugger by marking _pool_handler as nodebug.
138 - speed up Coro::async considerably.
139 - try some hacks to get netbsd to work "more often" - their broken
140 setjmp/longjmp, ucontext *and* phtreads are really hard on Coro.
141 - convert Coro to AE 5.0 API.
142
1435.162 Tue Jul 28 04:04:03 CEST 2009
144 - perl 5.8.2 is now minimum requirement.
145 - skip t/19_handle.t on broken windows perls.
146
1475.161 Wed Jul 22 04:47:38 CEST 2009
148 - Coro::AnyEvent::poll could have a different prototype when EV was
149 used as backend (analyzed by Tatsuhiko Miyagawa).
150 - Coro::AnyEvent errornously initialised the event loop when loaded,
151 not on demand.
152 - try to workaround rare */t/01_unblock.t failures.
153
1545.16 Tue Jul 21 01:44:37 CEST 2009
155 - Coro::AnyEvent failed to hook into the event loop
156 when no threads had been readied between detecting
157 the event loop and actually running it.
158 - considerably speed up Coro::Select by taking avdantage
159 of AnyEvent > 4.8 and some other optimisations.
160 - implement paragraph readline mode in Coro::Handle
161 (based on patches by Zsbán Ambrus).
162 - replace WSAEINPROGRESS by WSAEWOULDBLOCK (reported
163 and analyzed by Yasuhiro MATSUMOTO).
164 - clarified libcoro license and copyright.
165 - someone stole my EXTRA_META!!!
166 - implement Coro::Select::patch_pp_sselect and it's brother,
167 for hardcode select overriding.
168
1695.151 Mon Jul 6 05:41:57 CEST 2009
170 - backport to windows process emulation code again (patch by
171 Yasuhiro MATSUMOTO).
172 - slightly update Coro::MakeMaker.
173
1745.15 Tue Jun 30 10:28:06 CEST 2009
175 - deprecate Coro::Socket, document how to get ipv6 support via
176 AnyEvent::Socket instead.
177 - implement signal->wait ($cb) interface, similar to semaphores.
178 - work around SvOK not supporting getmagic, so we have to getmagic
179 to test for undef :/ (reported by Matthias Waldorf).
180 - load Coro::AnyEvent in all modules using AnyEvent.
181 - work around perl corrupting our internal data structures,
182 reported by Tokuhiro Matsuno.
183 - enable per-coroutine real and cpu time gathering
184 (Coro::State::enable_times).
185
1865.14 Wed Jun 24 01:37:48 CEST 2009
187 - provide explicit functions to "cede" to the event loop in Coro::AnyEvent,
188 as this seems to have been a difficult concept (poll, sleep, idle,
189 idle_upto).
190 - add Coro::AnyEvent::readable/writable functions.
191 - clarify Coro::EV/Event/AnyEvent manpages.
192 - free per-thread global scalars in the thread calling ->cancel, to
193 avoid crashes when $_, $@ etc., are magical but some of those
194 had already been freed.
195 - "unexperimentalise" the callback interface for Coro::Semaphore.
196 - speed up ready queue management/context switching by using a linked
197 list instead of an array (~5-10%).
198 - implement "watch" command in Coro::Debug shells.
199 - for fun, implement time-slicing as an example in the manpage.
200 - if AnyEvent detects EV or Event, but we don't have Coro::EV or
201 Coro::Event, use the normal AnyEvent handling instead of dieing
202 (the same is true for Coro::Handle).
203 - properly document Coro::EV::timed_io_once.
204 - avoid unneccessary ->cancel calls in Coro::Handle.
205 - maybe make it work on mingw32 with win32 backend
206 (based on patch by Yasuhiro Matsumoto).
207
2085.132 Fri May 29 09:00:39 CEST 2009
209 - do not keep a reference to the argument itself in
210 Coro::Semaphore::guard, as it could change later.
211 - support SO_RCVBUF/SO_SNDBUF nonstandard Coro::Socket options,
212 should support a prepare callback.
213
2145.131 Mon Mar 16 23:20:37 CET 2009
215 - implement and document Coro->suspend, Coro->resume.
216 - fix Coro::Select implementation to not (often) close
217 the passed file descriptors (testcase provided by pippijn).
218
2195.13 Mon Dec 15 21:51:42 CET 2008
220 - EXPERIMENTAL: implement dynamic winds (on_enter/on_leave).
221 - don't set diehook to C<undef> but instead to NULL, to avoid
222 spurious warnings.
223 - fix a lot of bugs in Coro::SemaphoreSet.
224 - Coro::SemaphoreSet will less often create a semaphore needlessly.
225 - add Coro::SemaphoreSet::count and wait methods.
226 - take advantage of the new Guard module.
227 - deprecate Coro::guard.
228 - try to fix the dreaded 01_unblock tests once more. I hate it when
229 testsuites need more fixing than the code they are supposed to test.
230 - croak in more cases when a required callback isn't resolvable.
231 - fix some minor issues in Coro::State->call/eval.
232 - use current coroutine context instead of a temporary one
233 when temporarily switching to another coroutine.
234 - do not call C-level on_destroy handlers during global destruction,
235 to avoid needless segfaults.
236
2375.12 Sun Dec 7 13:30:38 CET 2008
238 - add default config for MirOS, which seems to be a bug-to-bug
239 compatible fork of openbsd ("world domination by releasing
240 openbsd cvs before the openbsd folks do it" or so :).
241 - free_padlist did destroy the names pad, not good, but didn't
242 seem to bother perl - this could fix issues such as eval ""
243 inside a function called from multiple coroutines.
244 - use a different method to detect destruction time.
245 - be more careful when freeing padlists just before global
246 destruction.
247 - fixed and expanded the call/cc example.
248 - renamed _terminate to _coro_run.
249 - new method Coro::Channel->shutdown.
250 - try pthreads on openbsd <4.4 (broken sigaltstack, will
251 pthreads fare better?).
252 - be less picky about destroying "a" running coroutine.
253
2545.11 Tue Nov 25 21:49:05 CET 2008
255 - DEBUGGING in 5.10.0 is a mess: it constantly flags perfectly
256 working code with failed assertions, introducing more bugs than
257 it fixes, requiring elaborate workarounds :(
258
2595.1 Mon Nov 24 08:54:59 CET 2008
260 - wrote a small introductory tutorial - Coro::Intro.
261 - convert Coro::Timer, Coro::Select and Coro::Util to rouse API.
262 - Coro::Select did errornously dup the file descriptors
263 and didn't work with all AnyEvent backends.
264 - Coro::Select wasn't imported correctly form Coro::LWP, causing blocking
265 LWP data transfers.
266 - disassociate c contexts from coro objects - this is agruably more
267 correct, but mostly allows sharing of cctxs between coro and state
268 objects, for added memory savings and speed increases.
269 - bumped $Coro::POOL_RSS up to 32kb by default.
270 - no longer set the optype to OP_CUSTOM, as B::* understandably
271 doesn't like this very much (and we *are* a type of entersub).
272 - implement state cloning, just to prove that call/cc can be done.
273 - automatically load Coro::AnyEvent in Coro::Handle.
274 - wrap ->cancel calls in eval inside Coro::Handle as EV watchers
275 do not have this method (and don't need it either).
276 - speed up generic anyevent methods in Coro::Handle by using rouse
277 callbacks.
278 - allow coroutines in $Coro::IDLE, speeding up Coro::AnyEvent and
279 others. It also makes the debugger happier, as you can trace
280 through the idle threads now.
281 - add comppad_name* and hints ($^H, %^H) to per-thread variables.
282 - eg/event was pretty broken.
283 - better 5.8.6 compatibility.
284
2855.0 Thu Nov 20 10:35:05 CET 2008
286 - NEW ARCHITECTURE: use the latest 4.x version if you experience
287 stability issues.
288 - bump API version to 7 - all dependents must be recompiled.
289 - removed timed_* functions - they were not being used anyways
290 and should be replaced by a more generic mechanism -
291 and were annoying to support anyways :)
292 - removed SemaphoreSet's waiter method - use sem method instead.
293 - Coro::Semaphore->adjust didn't correctly wake up enough waiters.
294 - async_pool did free a scalar value twice
295 ("Attempt to unreference...").
296 - fix a longstanding bug where calling terminate on a coro that
297 was waiting for a semaphore that was just becoming available
298 would cause a deadlock (semaphore would get into a state where
299 it was available but waiters were still blocked).
300 - calling throw on a coroutine that is waiting for a semaphore will
301 no longer make it acquire the semaphore (and thus leak a count).
302 - perl's process emulation is now not even theoretically supported
303 anymore.
304 - new functions Coro::rouse_cb and Coro::rouse_wait for easier
305 conversion of callback-style to blocking-style.
306 - new methods $coro->schedule_to and ->cede_to, to specifically
307 schedule or cede to a specific coroutine.
308 - new function Coro::Semaphore::wait.
309 - use named constants in Coro::Channel (Richard Hundt).
310 - directly patch the entersub opcode calling SLF functions (cede,
311 transfer and so on). this does speed up context switching, but
312 more importanly, it frees us from the hardcoded behaviour of
313 entersub, so we might actually be able to return something from
314 those functions and atcually create new ones.
315 - take advantage of __builtin_frame_address on gcc.
316 - expose THX in coroapi (not sure whether this was a wise decision,
317 as "threaded" perls are running at half speed anyways).
318 - implement execute_slf (schedule-like-function) interface that makes
319 it possible to implement schedule-like-functions in XS.
320 - use new SLF interface to massively speed up Coro::EV by roughly a
321 factor of two.
322 - used new SLF interface to massively speed up Coro::Semaphore by a
323 factor of three.
324 - used new SLF interface to speed up Coro::AIO by roughly a factor of
325 four and reduce its memory usage considerably.
326 - implement Coro::SemaphoreSet purely in terms of Coro::Semaphore,
327 for a nice speedup and vastly more correct behaviour. Also implement
328 a new method "sem" to get at the underlying semaphore object.
329 - implement Coro::Channel in terms of Coro::Semaphore, for a moderate
330 (in comparison) 20-40% speedup.
331 - used new SLF interface to reimplement Coro::Signal gaining
332 some unknown (because I was too lazy), but certain, speedup, and also
333 making signals reliable for the first time.
334 - used new SLF interface and other optimisations to speed up async_pool
335 by a factor of two. It also doesn't rely on perl's exception mechanism
336 to exit anymore. The overhead for terminating an async_pool, coro over
337 a normal async is now very small.
338 - sped up coroutine creation/destruction by 40%.
339 - forgot to include Coro/libcoro/README in the dist for all these years.
340 - work around a freebsd pthreads bug (manual testcancel is required as
341 pthread_cond_wait isn't a cancellation point on freebsd).
342 - use new rouse functions to speed up and simplify Coro::BDB.
343 - make "prefer perl native functions" work with threaded perls.
344 - condense Coro::Debug ps output, hint at v and w flags.
345 - (libcoro) lots of minor cleanups and portability improvements.
346
3474.914 Wed Nov 19 12:54:18 CET 2008
348 - fix a disastrous bug in the readline optimisation
349 introduced in 4.801.
350
3514.913 Sat Nov 15 07:58:28 CET 2008
352 - async_pool did free a scalar value twice
353 ("Attempt to unreference...").
354
3554.912 Thu Nov 13 18:31:23 CET 2008
356 - minor cleanups.
357 - use much larger stacks on linux and perl < 5.8.8.
358 - Coro::Debug::new_unix_server did not unlink the socket
359 when destroyed.
360
3614.911 Tue Nov 11 04:26:17 CET 2008
362 - "port" to threaded perls.
363
3644.91 Mon Nov 10 05:36:38 CET 2008
365 - the ->throw exception object no longer leaks.
366 - creating a new cctx leaked a scopestack entry (memleak).
367 - new coroutines didn't get created with a zero flags field
368 (unknown impact).
369 - calling ->throw on a not-yet-started coroutine should now work
370 instead of being ignored.
371 - ->throw is now supported on Coro::State objects.
372 - clean up cctx creation code a bit.
373 - entersub is actually a UNOP, not a LOGOP (not a bugfix).
374
3754.9 Sat Nov 8 17:45:27 CET 2008
376 - (libcoro) did not preserve rbp with CORO_ASM (we are getting there).
377 - (libcoro) no longer leak threads in the experimental pthread backend,
378 also speed it up considerably.
379 - (libcoro) do not rely on makecontext passing void *'s unscathed.
380 - fix compiletime dependencies on libcoro in the Makefile.
381 - cctx_count wasn't always updated properly.
382 - Coro::State::cctx_stacksize wasn't applied correctly.
383 - new function Coro::State::cctx_max_idle.
384 - the default max number of idle C contexts is now 4.
385 - (libcoro) try harder to get _setjmp/_longjmp.
386 - (libcoro) cleanup and extend the libcoro API to officially
387 allow the creation of empty source contexts.
388 - very experimental workaround for the totally broken netbsd platform.
389 - tried to hack around openbsd bugs.
390
3914.804 Wed Nov 5 16:36:00 CET 2008
392 - Coro::Debug::new_unix_server would not create a non-blocking listening
393 socket, sometimes causing freezes.
394 - (libcoro) fix misaligned stack points for setjmp and assembly
395 methods, which can cause crashes on x86/x86_64 with a sufficiently
396 aggressive compiler.
397 - new function: Coro::Debug::new_tcp_server.
398 - move ->throw into the Coro class because it only works on coro objects.
399
4004.803 Mon Nov 3 17:16:12 CET 2008
401 - (libcoro) use a global asm statement to become independent of gcc
402 otpimisations for CORO_ASM (thanks to pippijn for the idea).
403 - try to workaround yet another broken bsd, this time dragonfly.
404
4054.802 Thu Oct 30 10:56:12 CET 2008
406 - support -fno-omit-frame-pointer on x86 with the assembly method.
407 - tune 01_unblock.t tests a bit.
408
4094.801 Wed Oct 22 18:33:37 CEST 2008
410 - improve readline speed for very long "lines".
411 - backport to 5.8.8.
412
4134.8 Thu Oct 2 13:34:40 CEST 2008
414 - new function Coro::AIO::aio_wait.
415 - Coro.:AIO and Coro::BDB now "use Coro::AnyEvent".
416 - greatly speed up and reduce memory usage of Coro::AIO requests.
417 - implement some other µ-optimisations.
418
4194.749 Mon Sep 29 14:40:12 CEST 2008
420 - port to slow and broken pseudo-threaded perls. (courtesy pippijn).
421
4224.748 Sat Sep 27 14:03:19 CEST 2008
423 - implement, but do not document, PerlIO::cede(granularity).
424 - Coro::Storable forgot to wrap Storable::pstore.
425 - work around the multitude of leaks and memory corruption
426 bugs in PerlIO::via by using our own C-level perliol. As a side
427 effect, Coro::Storable is now much, much, much faster.
428
4294.747 Tue Sep 23 01:59:41 CEST 2008
430 - fix a per-cv memleak (one empty array was leaked per
431 code reference).
432 - avoid a crash in coro->call|rss when the coroutine was already
433 destroyed (most noticably when using Coro::Debug::ps :)
434 - also protect *Storable::FILE.
435 - push up default storable granularity to 20ms.
436
4374.746 Sun Sep 21 03:22:20 CEST 2008
438 - be more insistent on locking Storable against reentrancy
439 in Coro::Storable.
440 - move swap_def?v and throw to Coro::State, as documented.
7 441
84.745 Thu Jul 24 00:14:38 CEST 2008 4424.745 Thu Jul 24 00:14:38 CEST 2008
9 - remove debugging code related to MgPV_nolen_const, also try to 443 - remove debugging code related to MgPV_nolen_const, also try to
10 make it compile with perl 5.8.6 (yes, apple apparently loves 444 make it compile with perl 5.8.6 (yes, apple apparently loves
11 outdated software). Reported by John S. 445 outdated software). Reported by John S.

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