--- Coro/Changes 2006/11/07 11:24:18 1.145 +++ Coro/Changes 2008/04/24 10:31:59 1.337 @@ -1,5 +1,349 @@ Revision history for Perl extension Coro. +TODO: should explore PerlIO::via::CoroCede and PerlIO::via::CoroAIO. +TODO: maybe implement a default message channel, very much like Erlang's + actor model (which is cool in a lot of important aspects (failures!), + but very lacking in others (higher level ipc)). + + - INCOMPATIBLE CHANGE: sub/code attributes are no longer supported + by the Coro module. It was a mistake. + - coro_sigelem_set did not return a value although it had to, + actual impact unknown. + +4.51 Mon Apr 14 13:28:27 CEST 2008 + - make it compile again on 5.8. + +4.50 Thu Apr 10 09:43:17 CEST 2008 + - I did it twice! (see 4.49). + +4.49 Sun Apr 6 21:23:31 CEST 2008 + - grr, instead of compiling the recent changes on 5.10 only they + were compiled on 5.8 only. + +4.48 Sun Apr 6 20:36:46 CEST 2008 + - allow coroutine switches during eval's under 5.10.x, as it seems + the parser is a per-interpreter option now, so this is safe + (this might fix the odd crashing bug). + - drop support for 5.9.x versions: they are dead, jim. + +4.47 Sun Apr 6 00:37:52 CEST 2008 + - force cctx allocation on API calls: we know we need to force one + and gcc actually manages to confuse our heuristic nowadays, + leading to crashes and worse. + - document force_cctx. + +4.46 Fri Apr 4 22:05:43 CEST 2008 + - upgrade libcoro, resulting in pthread-backend (which was only created + to fulfill the rules of the programming languages shootout). + +4.45 Thu Mar 13 11:55:36 CET 2008 + - fix a file leaking bug in eg/mhyttpd that would allow + downloading of any file (reported by oesi). + - fix deadlock bug in Coro::Channel (reported by Richard Hundt) + (also add testcase). + - support Broadcast option in Coro::Socket (patch by Richard Hundt, + apparently having loads of fun with that). + - implement $state->swap_defsv, ->swap_defav and document ->throw. + +4.4 Wed Feb 13 16:44:29 CET 2008 + - only assume .cfi pseudo isns exist on GNU/Linux. + - add get_timed method to Coro::Channels. + - fixed Coro::Debug manpage. + - perl 5.11 compatbility improvement based on patch by + Andreas König. + +4.37 Sun Jan 20 11:25:23 CET 2008 + - soften the check for an active parser for perl 5.10 (avoiding + "Coro::State::transfer called while parsing" in many cases). + +4.36 Sun Jan 13 10:53:56 CET 2008 + - reset diehook when terminating from an async_pool as to not + trigger any __DIE__ handlers. + +4.35 Sun Jan 13 04:14:13 CET 2008 + - "bt" debug command now displays any exceptions + from longmess and also skips the innermost + stackframes, giving more useufl output. + - allow backtraces in coroutines blocked in Coro::EV, + at a <1% speed hit. + - handle localising of $SIG{__WARN__} and __DIE__ + properly (with a proper amount of dirty hacking). + +4.34 Sat Dec 22 17:49:53 CET 2007 + - upgrade to EV version 2.0 API. + +4.33 Mon Dec 17 08:36:12 CET 2007 + - make Coro::AIO etc. loadable in the absence of EV. + +4.32 Mon Dec 17 07:46:02 CET 2007 + - majorly improved Coro::Handle's performance with Coro::EV. + - implemented the until now mythical Coro::BDB module. + - specialcase EV in Coro::AIO and Coro::BDB for extra speed. + +4.31 Wed Dec 5 12:32:39 CET 2007 + - remove warn statement form Coro::Util. + +4.3 Tue Dec 4 20:33:14 CET 2007 + - calls to the idle function could cause stack corruption + when the stack changed. + - do no longer rely on the presence of EV::DNS if EV is used + (because it is gone), but instead take avdantage of EV::ADNS + if available. + - add ($) prototypes to all functions in Coro::Storable. + - use a conventional (safer) idle callback in Coro::EV. + - do accept quickly in Coro::Debug to avoid endless loops. + +4.22 Fri Nov 30 16:04:04 CET 2007 + - really use optimised versions for Event and EV in Coro::Util + and Coro::Handle. + +4.21 Sun Nov 25 10:48:59 CET 2007 + - fix a spurious memory read. + - Coro::EV no longer keeps the eventloop "alive". + +4.2 Fri Nov 9 20:47:05 CET 2007 + - enable/disable tracing from a new coroutine, not a pooled one. + - fix a memleak in Coro::Event. + - removed killall call from fork_eval. + - made sure store_fd is already loaded so that fork_eval + does not have to parse autoload in each subprocess. + - only use assembly method if -O switch is in $Config{optimize}. + - add (optional) Coro::EV module, so far the best event loop module + directly supported by Coro. + - if the event model is EV, use EV::DNS to resolve + stuff in Coro::Util. + - don't get confused by multiple event notifications in Coro::Handle. + - initial support for EV (libevent interface). + - require Event and EV using configure_requires, to force their existance. + +4.13 Wed Oct 24 07:26:45 CEST 2007 + - add Coro::Storable::blocking_thaw. + - use a vastly more complicated technique to localise + $SIG{__WARN/DIE__} that also works on perls <= 5.8.8. + - use a coroutine for the idle callback Coro::Event, + instead of running Event in the current coroutine context. + This also catches recursive invocations. + - actually report fork errors in gethostbyname and inet_aton. + +4.11 Thu Oct 11 02:40:24 CEST 2007 + - port to threaded perls. + +4.1 Thu Oct 11 02:38:16 CEST 2007 + - incompatible change: $SIG{__DIE__} and $SIG{__WARN__} will now + be local to each coro (see Coro::State). + - incompatible change: for very deep reasons, cede and cede_notself + cannot return anything, so nothing will be returned. + - possibly bring back 5.10 compatibility (untested). + - work around stupid (and wrong) warning on 5.10 :(. + - overlay the saved state over the context stack. This saves + a few hundred bytes per coroutine on average and also + speeds up context switching a bit. + - further tune default stack sizes. + - (more) correctly calculate stack usage in coro_rss. + - Coro::Storable::blocking_* did not properly lock + resulting in races between coroutines. + - added Coro::Storable::guard. + - stopping to trace a coroutine could destroy the cctx of + an unrelated coroutine. + - explain the relationship between Perl and C coroutines in + more detail in Coro::State. + - Coro::Util::inet_aton did not short-circuit dotted quad forms, + causing a fork per resolve. This also affected Coro::Socket. + - switch to a separate stack in $coro->call/eval to avoid + invalidating pointers. + +4.03 Sat Oct 6 21:24:00 CEST 2007 + - added Coro::throw method. + - minor code cleanups. + +4.02 Sat Oct 6 02:36:47 CEST 2007 + - fix a very minor per-coroutine memleak (a single codereference). + - fixed a bug where the currently in-use c context would be freed + prematurely (can happen only when programs change the stacksize + or use tracing). + - tracing can no longer keep a coro alive after it terminated. + - do static branch prediction in the common path for gcc. gives + about 2-5% speed improvement here. + +4.01 Fri Oct 5 22:10:49 CEST 2007 + - instead of recreating *a* standard output handle we simply + use STDOUT, which is faster and hopefully more robust. + +4.0 Fri Oct 5 12:56:00 CEST 2007 + - incompatibly changed Coro::Storable::freeze. + - major new feature: added Coro::Debug, for interactive coroutine + debugging, tracing and much more. + - major bug fix: unbelievable, but true: $_, $/ and many other + "saved" variables actually weren't being saved. This has been fixed, + of course, while increasing performance while losing all the save + flags. + - save flags are gone, and all the api functions dealing with them. + - added Coro::Semaphore::adjust. + - added Coro::Util::fork_eval. + - added Coro::Storable::{nfreeze,blocking_{freeze,nfreeze}}. + - added Coro::killall. + - reduce initial stack sizes to allow for "micro-coroutines". + - better async_pool resource management, moved parts of async_pool + handling to XS (major speed improvement). + - actually croak before modifying important data structures. + - refuse to transfer while compiling. + - possibly support eval EXPR better now. + - enable assembly per default on linux+bsd x86+amd64. + - all internal members were renamed _something for easier subclassing. + - many minor tweaks. + +3.63 Wed May 16 14:10:06 CEST 2007 + - implement handcoded assembly for x86/amd64 SVR ABI. + +3.62 Fri Apr 27 21:36:06 CEST 2007 + - upgrade libcoro (which might set unwind info correctly). + - change default on linux to setjmp/longjmp. + +3.61 Thu Apr 19 12:36:18 CEST 2007 + - Coro::Storable caused an endless loop when thawing invalid + pst's sometimes. + - use a Semaphore in Coro::Storable, as Storable doesn't + seem to be reentrant (although it is documented to + be threadsafe...). + - fix Coro::Signal to bring back the original unreliable + but stateful semantics. + - fixed a lot of typos in Coro.pm (patch submitted by David + Steinbrunner, which applied flawlessly). + +3.6 Sat Apr 14 17:13:31 CEST 2007 + - added some bugfixes to get eg/myhttpd working again. + - added Coro::Storable for often-cede'ing freeze/thaw. + - try to do a clean exit when a coroutine calls exit + (EXPERIMENTAL). + - got rid of indirect call through _coro_init. + - updated the partly antique examples in eg/ to + work again and be a bit less magic, too. + - fixed Coro::Signal semantics to work as documented again. + +3.55 Sun Mar 25 01:20:47 CET 2007 + - add SAVE_DEFFH to save the default filehandle and enable + it by default. + - finally move socket-operations from Coro::Socket to Coro::Handle + to be able to unblock foreign sockets. + - add Coro::State::save_also and guarded_save. + - add count accessor to Coro::Semaphore. + - add Coro::State::cctx_stacksize. + - just for the fun of it, do not rely on implicit context, + which can dramatically improve performance, but people + using windows-process-emulation perls do not care much about + performance. + +3.51 Sun Mar 4 14:18:04 CET 2007 + - fixed a problem when you weakened references to Coro::State's + (patch by Yuval Kogman). + +3.501 Wed Feb 28 12:44:07 CET 2007 + - rename some global symbols as macosx from hell redefines + them without asking. + +3.5 Tue Feb 13 20:22:53 CET 2007 + - do AnyEvent model detection earlier, avoiding problems + caused by first using AnyEvent and later Coro::Event. + - implement and document Coro::Event event objects. + - fix a potential problem in Coro::Event causing crashes. + - initialise PL_comppad when creating a new coroutine, + avoids crashes on early coro destruction. + +3.41 Mon Jan 22 19:19:49 CET 2007 + - readline on Coro::Handle did not support undefined $/, + nor did it deliver partial lines on EOF or error. + - implement malloc fallback for stack allocation because + stupid broken idiotic OSX has a stupid broken + idiotic fits-the-whole-os mmap "implementation" and + my dick feels longer if Coro is portable even to + obsolete platforms. + +3.4 Fri Jan 19 21:52:54 CET 2007 + - remove t/09_timer.t, as it isn't really testing much + but was rather flaky in practise. + - async_pool coro would keep arguments and callback alive until + it was reused. + - cancellation of a coroutine could cause spurious idle calls + in cede_notself. + +3.3 Sat Jan 6 03:45:00 CET 2007 + - implement $coro->on_destroy. + - Coro::Event blocking semantics have been changed, + documented and - hopefully - improved. + - fix nice adding, not subtracting, from priority. + - fix ->prio and api_is_ready (patch by Mark Hinds). + - fixed an assert ("... == prev__cctx->idle_te") + that could errronously trigger. + - fix various large and small memleaks. + - use a (hopefully) more stable cancel implementation + that immediately frees the coroutine data. + - cede/cede_notself return a status now. + - added Coro::guard function. + - added a global coroutine pool for jobs (on my machine, + I can create and execute 48k simple coros/s with async, + and 128k coros with async_pool). + - Coro::AIO now uses the coroutine priority as io priority. + +3.2 Fri Dec 22 05:07:09 CET 2006 + - improve portability to slightly older perls. + - use cleaner coroutine destruction. + - simplify configuration for users. + - optionally (unrecommended) prefer perl functions over + their coro replacements. + +3.11 Tue Dec 5 13:11:24 CET 2006 + - fixed some bogus assert's, but as perl.h disables assert even + without NDEBUG (thank you very much), not too many people should + notice (that did include myself). Andreas König noticed, though :) + - do not save/restore PL_sortcxix on >= 5.9.x, it doesn't seem to have + it. Also noticed by Andreas König :) + - save/restore tainted status. + - verified to pass the testsuite on my 5.9.5. + +3.1 Mon Dec 4 23:03:40 CET 2006 + - INCOMPATIBLE CHANGE: $/ is now per-coroutine (but slow). + - incompatible change: transfer flags are now per-state. + - give a better error message on deadlock. + - document Coro::nready. + - enhanced testsuite. + +3.01 Sun Dec 3 23:47:42 CET 2006 + - forgot to include Coro::Timer. + +3.0 Sun Dec 3 22:57:25 CET 2006 + - the "FINALLY COMPLETELY STABLE" release (coming soon: + the "FAMOUS LAST WORDS" release). + - implement a new stack sharing algorithm, which uses a stack + pool (size currently hardcoded). + - make stack sharing mandatory (it no longer uses a heuristic). + - eval/die no longer cause weird problems under heavy use. + - Coro::Event could cause livelocks if it was used but + no Coro::Event watchers were used. + - Coro::Event now uses asynccheck as prepare does not + check for changed watchers. + - Coro::Event allows multiple waiting coros and will wake up one + per event. + - Coro::Event should be cleaner and more efficient now. + - new utility function Coro::unblock_sub. + - document the sad fact that Event is no longer reentrant. + - putting a coroutine into the ready queue twice could under + some circumstances lead to stack corruption. + - minor incompatibility: subclassing Coro::State is supported + directly now without going through a _coro_state member. + - state/coro switching is much faster now. + - very minor optimisations and code/documentation cleanup. + - avoid problems due to compiler inlining. + - removed timers from Coro::Timer -> use AnyEvent instead. + - replaced Coro::idle coroutine by (cleaner) idle handler. + - updated to newest libcoro. + - implement enhanced support for valgrind. + - implement is_ready and return value for ready. + - removed Coro::Cont, it was a misnomer (it's generators), + and it was somewhat annoying to get it right. Will come back + if somebody asks for it :) + - many ->wait methods and Coro::Event could return + spuriously without the event having happened. + 2.5 Tue Nov 7 12:22:33 CET 2006 - made Coro::Util, Coro::Select, Coro::Handle and Coro::Socket use AnyEvent, moved them to Coro/.