0.19 21 May 2006
Implemented an exported bless() function allow transparent bless()
across threads with forks::shared.
Implemented exported is_thread function in forks::shared.
Implemented custom CHLD signal handler to cleanup zombie process.
This change was introduced to resolve an issue on some platforms
where using $SIG{CHLD}='IGNORE' resulted in the perl core system()
function returning -1 instead of the exit code of the system call.
This signal handler is only used if the target system's system()
call returns -1 on success when $SIG{CHLD}='IGNORE'.
Added THREADS_SIGCHLD_IGNORE to allow users to force forks to use
$SIG{CHLD}='IGNORE' on systems where a custom CHLD signal handler
is automatically installed to support correct exit code of perl
core system() function.
Added THREADS_NICE env param to allow user to adjust forks.pm server
process POSIX::nice value when running as root. If unset, no change
is made to the server process priority. This differs from the
historical behavior of forks.pm defaulting to nice -19 when run as
root.
Patched XS code to be ANSI C86 compliant (again). Code was unintentionally
changed to require a minimum of ANSI C89 compliance since 0.17. This
should allow all gcc 2.95.x and other C86-compliant compilers to once
again build forks.pm.
Fixed prototype mismatch warning when disabling cond_wait when forks
is used before forks::shared.
Added patch to quietly ignore sharing an already shared variable.
forks::shared used to bombs out in such cases (e.g. $a:shared; share($a);).
Updated to ppport.h 3.06.
Implemented separate package versions for forks and threads. threads
package version will represent the most recent threads.pm release that
this module is functionally compatible with.
Disabled call to server process on shared variable DESTROY calls to
decrease server communication load, as none of the affected TIE classes
implement custom DESTROY methods.
0.18 7 December 2005
Introduction of UNIX socket support. Socket descriptors are written
to /var/tmp and given rw access by all by default for best support
on multi-user systems.
Importing SOMAXCONN and using for socket server listener max socket
connections (was hard coded at 10) for best (and system-level flexible)
thread spawn stability under high load.
0.17 14 May 2005 (unreleased)
Added method cond_timedwait and added second forms of cond_wait and
cond_timedwait per the ithread specification (where signal var
differs from lock var). All elements of perl ithread interface are
now implemented, with respect to perl 5.8.7.
Added eval wrapper around new thread code execution to trap die
events; thus, join() is now more robust (fewer chances for runtime
hangs on '$thread->join' due to premature child thread termination).
Fixed bug in _islocked in case where if main thread tried to unlock
an already unlocked variable, it would not correctly enter if case
and return undef or croak() due to undef value in @LOCKED resolving
to numeric 0.
0.16 8 April 2004
Changed semantics of debugging function: must now specify environment
variable THREADS_DEBUG to be able to enable and disable debugging.
If the environment variable does not exist at compile time, then all
of the debugging code is optimised away. So performance in production
environments should be better than before.
29 March 2004
Goto &sub considered evil with regards to performance and memory
leaking. Therefore removed goto's where appropriate.
0.15 14 January 2004
Just got too much mail from people attempting to use forks.pm on
Windows. Decided to add check for Win32 to Makefile.PL to have it
die when attempting to run on Windows. Added documentation to
explain this.
0.14 7 January 2004
Removed dependency on load.pm: it really doesn't make sense in a
forked environment: I don't know what I was thinking in that respect.
Added dependency on IO::Socket 1.18: we do need auto-flushing sockets
(which seems to be pretty standard nowadays, but just to make sure).
Fixed problem with large values / structures being passed with some
help from Jan-Pieter Cornet at the Amsterdam PM Meeting. Spotted by
Paul Golds. Added test for it.
0.13 4 January 2004
Looked at fixing the problem with signalling unlocked variables.
Unfortunately, there does not seem to be a quick solution. Need to
abandon this idea right now until I have more time. Updated
documentation to let the world know there is an inconsistency.
Documented the THREADS_DEBUG environment variable and made sure it is
unset during testing.
Updated ppport.h to 2.009. Didn't expect any problems with 5.8.1,
but you never know.
0.12 2 January 2004
Fixed problem with signalling thread 0. Spotted by Stephen Adkins.
0.11 28 December 2003
Added automatic required modules update using Devel::Required.
Added requirement for Devel::Required, so that optional modules
are listed as required on the appropriate systems.
0.10 11 November 2003
Added check for processes dieing at the length check of a message.
Not 100% sure whether this will be the best way to handle the main
thread dieing, e.g. when it exits before all threads have been
joined.
0.09 24 October 2003
Apparently, Test::Harness cannot handle testing "threaded" scripts
using an unthreaded Perl. Added test for threadedness of the Perl
being used: if so, skips testing Thread::Queue. Spotted by several
CPAN testers.
0.08 24 October 2003
Shared entities that were also blessed as an object, were not
correctly handled (ref() versus Scalar::Util::reftype() ). Spotted
by Jack Steadman. Now fixed by using reftype() rather than ref().
Dependency on Scalar::Util added (not sure when that became core).
Added tests to excercise Thread::Queue (if available).
10 October 2003
Changed async() to make it a little faster by removing an extra call
from the stack.
0.07 27 September 2003
Added error detection in case lock or cond_xxx were called on unshared
variables or cond_xxx were called on an unlocked variable. Added tests
for it in the test-suite.
Added dummy package declaration to forks::shared.pm for CPAN's sake.
Cleaned up the attribute handler code in forks::shared.pm a bit.
0.06 27 September 2003
Finally grokked the documentation about attributes. This allowed me
to finally write the handler for the ":shared" attribute. Which in
the end turned out to be surprisingly simple.
Adapted the test-suite to test usage of the ":shared" attribute as
opposed to sharing variables with the "share" subroutine.
0.05 26 September 2003
Increased dependency on load.pm to 0.11: versions of load.pm before
that had issues with running under taint.
Debug statements can now be activated by setting the environment
variable THREADS_DEBUG to true. As this is still experimental, this
feature is only described in the CHANGELOG for now.
Fixed several issues when running under taint. Test-suite now runs
in tainted mode just to be on the safe side.
Removed some debug statements from the test-suite.
0.04 10 August 2003
Implemented .xs file munging and source-filter to be able to truly
support forks.pm under Perl 5.6.x. Thanks to Juerd Waalboer for the
idea of the source filter.
It is now confirmed that forks.pm won't work under 5.005, so the
minimum version of Perl is now set to 5.6.0 in the Makefile.PL.
7 August 2003
Tested under 5.8.1-RC4. The WHOA! messags seem to have disappeared
but instead a warning has appeared that cannot be suppressed. This
was caused by my attempt to activate the :shared attribute. Since
that doesn't work anyway, I removed the offending code and the
warning went away.
Fixed some warnings in the test-suite.
Fixed another warning in forks.pm. Reported by Bradley W. Langhorst.
0.03 2 April 2003
Fixed a warning in forks.pm. Reported by Bradley W. Langhorst.
0.02 17 January 2003
Added dummy -package forks- to forks.pm to fool CPAN into thinking
it really is the forks.pm module, when in fact it is of course
threads.pm.
Fixed some warnings in t/forks01.t.
28 October 2002
Made sure length packing uses Network order.
0.01 27 October 2002
First public version of forks.pm. Thanks to Lars Fenneberg for all
the help so far.