0.17 7 January 2004 Fixed some documentation inconsistencies. Added documentation on what is different from Thread::Queue::Any. Made default optimization dependent on the version of Perl used. Added test for it. Removed mention of Storable: replaced it with Thread::Serialize. Added Thread::Serialize as a dependency, just for documentation sake really. 0.16 28 December 2003 Added automatic required modules update using Devel::Required. Added dependency to load.pm. 0.15 9 November 2003 A problem in (threaded) 5.8.2 made Thread::Conveyor segfault in the test-suite. The problem was fortunately easy to circumvent: just don't use subroutines consisting of {} as an object method (in the case of Thread::Conveyor, the shutdown() method). 0.14 11 August 2003 Cleaned up Makefile.PL and updated copyright info. Verified everything works with 5.8.1. Updated dependency of Thread::Tie. 0.13 30 September 2002 Use "load.pm" instead of AutoLoader. Changed dependency on Thread::Tie to version 0.08 (which also uses load.pm). Added check for availability of methods again: load.pm does support that, whereas AutoLoader does not. 0.12 27 September 2002 Ask found another problem in T::C::Tied::clean_dontwait. Fixed. Also left warnings enabled in the test-suite last time, which caused warnings in the make test. Changed code so that the warnings are not emitted anymore. 0.11 26 September 2002 Fixed some warnings in T::C::Throttled, spotted by Ask Bjoern Hansen. Removed "our" from $VERSION and @ISA, should shave off some bytes in memory usage, as found from testing with Benchmark::Thread::Size. 0.10 1 September 2002 Replaced dependency on Thread::Serialize by dependency on Thread::Tie as the default, memory optimized implementation, now uses Thread::Tie. Changed Thread::Conveyor so that it uses T::C::Tied for unthrottled belts when optimizing for memory. Changed T::C::Throttled so that it makes its own decision on which belt implementation to be used, either T::C::Array (optimized for CPU) or T::C::Tied (optimized for memory). Added "semaphore" object method to T::C::Array for obtaining the lock() semaphore, needed by T::C::Throttled. Removed T::C::Thread from the distribution. This shaves about 1200 bytes off of the distribution package. Replaced Thread::Conveyor::Thread by Thread::Conveyor::Tied, which uses Thread::Tie as its shared array implementation. This has the side-effect to being almost twice as slow but saving 18% of memory (at least in the test-suite). So there is now a true CPU versus memory trade-off. Main difference in CPU is caused by the fact that whole array fetches aren't possible using the tie() interface (this is a loop with FETCH()), wherease T::C::Thread was optimized to deal with that case). Main difference in memory is caused by the fact that only one thread (the Thread::Tie default thread) is used for all belts, whereas before each belt had its own thread. So the savings in memory could in real world situations, be quite a lot more than the 18% seen in the test-suite. 0.09 30 August 2002 Changed all modules to use AutoLoader to defer loading of necessary subroutines to when they are actually needed. This should save memory and CPU for larger programs, or with large numbers of threads. The test-suite only marginally takes more memory at the same CPU usage: overhead of compiling is levelled out with the overhead of cloning pre-compiled routines. 0.08 20 August 2002 Dave Mitchell showed me the error of my ways with regards to client server thread programming. Fixed the handler optimized for memory so that no yield()s are necessary anymore. The whole thing now gets through the test suite more than 25% faster for that part. Scalability to many more threads should now be a lot better too. 0.07 14 August 2002 Removed (possibly premature) optimization from T::C::Thread _handler: it now doesn't zap the local threadspace anymore. 0.06 13 August 2002 Handed over freezing and thawing operations to Thread::Serialize. Added dependency to Thread::Serialize in Makefile.PL. 0.05 6 August 2002 Fixed "onbelt" in T::C::Thread so that it won't hang if the belt is shut down. Needed for Thread::Pool and in general useful. 5 August 2002 Added index functionality to "peek" and "peek_dontwait" to all sub-classes and added documentation for it. Needed for Thread::Pool. Finally got the T::C::Thread implementation getting through the test-suite reliably. Problem was caused by my misconception that cond_wait would always regain the lock() after being signalled. It does not. This should have been in big red letters in the threads::shared pod. Added methods "shutdown", "thread" and "tid" plus documentation. 3 August 2002 Adapted test-suite to use many more combinations of possible settings. 2 August 2002 Added new "optimize" field parameter to allow you to select an implementation optimized for speed (T::C::Array and T::C::Throttled) or for memory (T::C::Thread). Added new implementation of Thread::Conveyor based on using a seperate thread for keeping the belt: Thread::Conveyor::Thread. Move basic parts of Thread::Conveyor to Thread::Conveyor::Array. Which should allow for other implementations of the conveyor metaphor. 0.04 1 August 2002 Added internal method "_belt" to get at the actual belt, for both the normal and the throttled belt. 0.03 31 July 2002 Added internal methods "_freeze" and "_thaw" so that we can move to a different serialization scheme or other optimizations without having to change all the sub-classes as well. First user is Thread::Conveyor::Monitored. Added "maxjobs" and "minjobs" method in Thread::Conveyor that will die when they're called (throttling only takes place in Thread::Conveyor::Throttled). Fixed problem that would cause throttling to not be switched off when the "maxjobs" method was specified with an undef value. Added methods "clean" and "clean_dontwait" for cleaning the belt to both Thread::Conveyor and Thread::Conveyor::Throttled. Also added documentation for it. Added internal method "_clean" for obtaining frozen contents of the belt to both Thread::Conveyor and Thread::Conveyor::Throttled. This was needed for Thread::Conveyor::Monitored. 0.02 30 July 2002 Adapted Thread::Conveyor to default to a throttled conveyor belt automatically if no specific parameters specified. Now allows for specification of throttling settings in a parameter hash reference. If unthrottling is specifically specified, returns to the old unthrottled behaviour (where the object is just an array reference), thus keeping the old execution speed. Added helper class Thread::Conveyor::Throttled to allow for throttled conveyor belts that block if there are too many boxes on the belt. Fixed some documentation nits. 0.01 25 July 2002 First version of Thread::Conveyor, which started life as Thread::Queue::Any.