$Id: Changes,v 1.15 1999/02/03 15:06:27 troc Exp $ Revision history for Perl extension POE. ======================================== Changes marked with "(!!!)" may break backward compatibility. Versions with "_xx" subversions are internal test releases. 0.06 1999.02.03 (!!!) --------------------- This is a public CPAN release. It incorporates all the changes since version 0.05. 0.05_57 1999.02.02 (!!!) ------------------------ (!!!) Renamed POE::Session::debug() as POE::Session::option(), per feedback from testers. This changes the original "_debug" semantics into something like environment variables for sessions. The ReadWrite wheel's InputState is optional. This allows for write-only wheels, which are good for writing logs. The followtail.perl test has been updated to use such a wheel for its log writer sessions. The FollowTail wheel now has an optional PollInterval parameter, which tells how long to wait (in seconds) between checking the file for new data. 0.05_56 1999.02.02 ------------------ Crimson found the real cause of Perl's coredumps, which allowed the 0.05_54 change to be rolled back. 0.05_55 1999.02.01 ------------------ (!!!) SIGWINCH is unsupported until Perl and/or POE implements safe signals. This signal was causing Perl to crash on xterm resizes. (!!!) Sessions' "_debug" variables have been removed. Instead, POE::Session now has a debug() method. This removes the _debug heap pollution, and allows for several per-session debug flags. 0.05_54 1999.01.30 ------------------ Backed out the change in 0.05_04 where wheels call their event handlers directly. This causes some sort of stupid closure or destructor trick (we're still not sure which) that makes perl SEGV on some systems. 0.05_52 1999.01.27 ------------------ Added Win32 support for non-blocking sockets. Unfortunately, the Win32 port's select() doesn't appear to support regular files, so POE is virtually useless for non-blocking filesystem work. On the plus side, sockets seem to function very well. Thanks to Sean Puckett (catbear) for tracking this down. 0.05_04 1999.01.15 (!!!) ------------------------ Fixed Reference.pm again. Storable's nfreeze is portable across networks and faster than FreezeThaw, so it's preferred. Thanks to Artur Bergman for pointing this out. (!!!) Changed _child parameters. $from is always the kernel. ARG0 is either 'gain' if the parent is being given a child; 'lose' if its child is being stopped; or 'create' if the new child was created by this session. ARG1 is always the child session's reference. For created sessions, ARG2 is the return value from the child's _start event handler. (!!!) Changed _parent parameters. $from is always the kernel; ARG0 is the old parent session; and ARG1 is the new parent session. (!!!) Changed event handler parameter order, and introduced a way to avoid future changes in the parameter order from breaking compatibility. Updated tests/*.perl examples to work with the new scheme of things. Added comments, and generally cleaned things up. Sessions' _start events may now include parameters. The selects.perl test is the first program to use this. Wheels now call event handlers directly instead of posting events. This should make things substantially faster. (!!!) Changed filters' return values, to make them more compatible with block and datagram protocols. Most people won't notice the difference, but this will break compatibility for Filter and Driver writers. 0.05_03 1999.01.14 (!!!) ------------------------ Fixed Kernel select dispatching. Changing $_ in event handlers would cause a fatal error. Fixed Reference.pm. Frozen references were not being thawed correctly under two conditions: If packet boundaries split them in certain places, and later if they contained \n. Thanks to sky and a-mused for finding this one. (!!!) Fixed Kernel.pm signal handlers. The kernel now waits on SIGCHLD and only generates a CHLD signal event if the child PID is 0 or more. The CHLD signal now includes the PID and $? as parameters. The only programs that break are ones that explicitly wait. It also always generates SIGCHLD/SIGCLD events as "CHLD" to simplify handlers. Fixed Kernel event dispatching so that events generated by select() no longer outpace Kernel::run's ability to dispatch them. Thanks to Dave Paris for finding this. Fixed SysRW.pm to flush as much data as possible all at once. This should reduce events and overhead when sending a lot of data. Thanks to Dave Paris for pointing this out. Added new tests. 0.05_02 1999.01.12 (!!!) ------------------------ Fixed signals. Now runs garbage collection on sessions after execution returns from non-terminal signal handlers. Fixed README, Changes, etc. to be more readable. I hope. Added tests/thrash.perl to check for memory leaks and benchmark "performance". (!!!) Changed "exception" to "expedite", with regard to Kernel select functions. The thrash.perl results look pretty bad, and DProf blamed IO::Select, so out it went. Revised internal data structures to be more efficient. (!!!) Removed support for multiple kernels, each to its own thread. See the 0.05 SIGPIPE notes. Rewrote documentation. Split it from individual packages, and placed it into its own pod file. Added return values for Kernel::alias_* functions. Localized $SIG{'__DIE__'} in "harmless" evals. Inlined Kernel::_kernel_select(). Added Artur Bergman's support for "package" sessions, and packagesessions.perl test. (!!!) Fixed Filter::Line::put() to treat @_ as an array of lines. This brings Filter::Line::put() into agreement with the documentation. Added Filter::Stream, a "null" filter that passes data through unchanged. Added Kernel::yield. Removed IO::Handle dependencies in the Kernel. Now it will work with plain old files as well. Added return values for Kernel::state. Created Wheel::SocketFactory, a replacement for IO::Socket::INET (tcp only so far) and IO::Socket::UNIX. All it does in create sockets, though... the sockets don't have IO::Socket-style methods. Made FreezeThaw the default for Filter::Reference, and issued a mandatory warning if Storable is used. Objects frozen with Storable are not thawable on different-endian systems. 0.05 1998.12.04 --------------- Delayed garbage collection on new sessions. Previously, sessions would be tested for garbage collection immediately after creation. Fixed a fatal bug in tests/proxy.perl. Added ability to redirect multiple ports. Added more logging information. Fixed SIGPIPE handling. Previously, SIGPIPE would be dispatched to every Session. Now it is dispatched directly to the session that was running when the signal occurred. This probably breaks multithreaded programs that contain multiple kernels, and I am considering dropping multi-kernel support. Fixed SIGRTMIN handling. At least one system has this signal defined in %SIG but doesn't support it. Assigning to $SIG{'RTMIN'} there causes an "Attempt to free unreferenced scalar" warning, and the test program hangs. POE now skips RTMIN and RTMAX when assigning handlers. Added Filter::Reference, contributed by Artur Bergman . Filter::References enables POE to pass copies of referenced data between processes. It requires C or C. Fixed Wheel::ReadWrite::put(). It used to send a concatenated version of @_ to its driver. This broke Filter::Reference when putting a list of references. Now it's up to respective Filter classes to do the right thing with @_. Fixed Wheel::ReadWrite. Now it sends FlushedState events when it should. 0.04 1998.11.24 --------------- Added $object->can($state) check when registering object methods as states/event handlers. Added Session aliases (symbolic references). See tests/names.perl for an example. Added Kernel::signal($session, $name). This sends signals directly to POE::Sessions or POE::Kernels without going to the operating system (which would send the signal to every kernel and session). The signals.perl test has been updated to test this. Added Kernel::call(). Takes the same parameters as Kernel::post, but dispatches the state/event immediately. Returns whatever the event handler did. The sessions.perl test test has been updated to test this. 0.031 1998.11.24 ---------------- Added tests/objsessions.perl to the manifest. D'oh! 0.03 1998.11.23 ---------------- Added new constructor syntax to POE::Session. It's now possible to say: new POE::Session($kernel, $object, \@methods). See tests/objsession.perl for an example. Removed an unnecessary function call in Kernel.pm. Rearranged Changes so the most recent ones come first. 0.02 1998.11.22 ---------------- Rewrote signals. Signals now propagate from parent to child sessions. "Terminal" signals now only kill sessions that don't otherwise handle them. Added subsecond resolution for alarms if Time::HiRes is available. See the docs for POE::Kernel::alarm(). Added POE::Kernel::delay() for "time() + $seconds" alarms. Uses Kernel's time(), which may be from Time::HiRes. Parent sessions will now wait around until all child sessions finish, unless they're explicitly killed off. Fixed a blessing bleed that caused implicitly returned objects to die in the wrong scope (confounding resource management). Added tests/proxy.perl, a simple line-based proxy example. 0.01 1998.08.15 ---------------- Initial release. Implemented Kernel, Session, Wheel, Driver, Filter. - EOF: Thank you for reading. -