Revision history for Perl extension IPC::Shareable. 0.01 Wed Jul 30 09:00:53 1997 - original version; created by h2xs 1.18. 0.05 Wed Jul 30 15:02:31 EDT 1997 - scalars can now be tied; Ben Sugars. 0.10 Fri Aug 1 13:32:52 EDT 1997 - can now tie both scalars and hashes of arbitrary length; Ben Sugars. 0.11 Wed Aug 6 10:14:49 EDT 1997 - initial implementation of semaphores for versioning and caching; Ben Sugars. 0.12 Thu Aug 7 14:47:42 EDT 1997 - various bug fixes; Ben Sugars. 0.15 Fri Aug 8 15:45:29 EDT 1997 - implemented locking using semaphores; Ben Sugars. 0.16 Mon Aug 11 16:10:54 EDT 1997 - new shared memory segments now initialized with null values; Ben Sugars. 0.17 Wed Aug 27 15:57:11 EDT 1997 - fixed some bugs in &parse_argument_hash; Ben Sugars. 0.18 Thu Aug 28 09:12:30 EDT 1997 - fixed garbage collection bug; Ben Sugars. Thanks to Michael Stevens <email@example.com> for the patch. 0.20 Thu Aug 28 15:13:46 EDT 1997 - added ability to magically create ties to implicitly referenced thingys; Ben Sugars. 0.25 Tue Oct 7 14:41:49 EDT 1997 - added more checking of sem*() and shm*() return values; Michael Stevens and Ben Sugars. - added shlock and shunlock; Ben Sugars. - fixed bug that would cause modifications of magically referenced thingys to fail. Thanks to Maurice Aubrey 0.26 Mon Oct 20 10:06:43 EDT 1997 - fixed bug regarding assigning a reference to an empty hash to a tied variable. Thanks to Jason Stevens. 0.28 Wed Oct 22 14:59:08 EDT 1997 - cleaned up the way thingys are magically tied; Ben Sugars. - moved many subroutines so that they are auto-loaded; Ben Sugars. - updated man page; Ben Sugars. 0.29 Mon Jan 12 13:49:42 EST 1998 - $MAXVER patch for when the version semaphore reaches its limit and rolls back over to 0; Maurice Aubrey <firstname.lastname@example.org>. - patch to quieten things down under -w; Doug MacEachern <email@example.com> 0.30 Mon Jan 19 11:13:41 EST 1998 - Added SEM_UNDO to semop() calls; Maurice Aubrey. - Fixed some bugs in the locking code; Maurice Aubrey. - Made calls to debug() conditional for efficency; Maurice Aubrey. - Fixed a signal handler in test.pl; Maurice Aubrey. 0.50 Tue Mar 21 11:56:32 EST 2000 - Complete rewrite incorporating the following changes. - Requires 5.00503. This allowed the module to get rid of the global cache for shared memory segments; each Shareable object now carries around its own data. - 5.00503 also allowed tied arrays to be implemented - Shared memory segments can no longer be of infinite length thereby reducing the amount of code in the module by a factor of 2. - Uses IPC::Shareable::SharedMem class for accessing shared memory. - Uses IPC::Semaphore module for accessing semaphores. - Completely revisited the way references are dealed with: all referenced thingies are now automagically tied to shared memory. - Constants now imported from IPC::SysV; Shareable.xs is gone - Rewrote test suite and moved into t subdirectory - Updated man page 0.51 Fri May 5 23:47:06 EDT 2000 - Fixed bug that would cause IPC::Shareable::BUF_SIZ to be ignored; thanks to Robert Emmery <firstname.lastname@example.org> and Mohammed J. Kabir <email@example.com> for reporting. - Stopped tests from leaking shm segments - Added test of argument parsing - doc fixes 0.52 Thu Sep 14 12:30:17 EDT 2000 - Now STORE, PUSH, POP, etc all call _thaw() before doing their business. - Refined SIGALRM handlers in test scripts - Fixed concurrency issues affecting tied arrays and hashes; thanks to thanks to Robert Emmery <firstname.lastname@example.org>, Terry Ewing <email@example.com>, Tim Fries <firstname.lastname@example.org>, and Joe Thomas <email@example.com>. - Doc fixes thanks to Paul Makepeace <Paul.Makepeace@realprogrammers.com> 0.53 Tue Nov 14 00:33:35 EST 2000 - Fixed race condition in test suite causing intermitent failures. - Better checking for success of calls to Storable::thaw(); thanks to Raphael Manfredi <Raphael_Manfredi@pobox.com>. 0.54 Mon Jan 8 11:52:28 EST 2001 - Fix to allow IPC::Shareable to work with 1.0.* versions of Storable 0.60 Mon Mar 5 15:20:18 EST 2001 - Lee Lindley (firstname.lastname@example.org) added the _was_changed optimization, improved the locking functionality, fixed numerous bugs, and generally cleaned things up; thanks. - Removed support for "no" as a false value in arguments; thanks to Dave Rolsky <email@example.com> 0.61 Mon Oct 8 00:27:39 2012 - Added patch from Frank Lichtenheld fixing IPC::Shareable's dependence on the presence of a perl bug which is no longer present in perl >= 5.10 - Fixed bug reported by Dan Harbin where the FETCH operation on a tie()d string containing HASH, ARRAY, or SCALAR fails because it was using the stringification of the data to determine what kind of reference it was. Now using Scalar::Util::reftype - Added missing dependency on IPC::Semaphore to Makefile.PL (reported by Adrian Issott) - Added a 'sleep 1' in a test that was hanging on certain systems due (possibly) to two alarm signals coming too quickly to the child process. From Ton Voon.