Bug #52268 for Imager: Issue with Imager and threads

Sun Nov 29 20:10:57 2009 phire123418 [...] gmail.com - Ticket created

Subject:

Issue with Imager and threads

While using Imager in conjunction with threads, and threads::shared, I encountered an issue with joining threads. Specifically, the second time I attempted to join a thread, the function blocked. I'm on Win XP, using strawberry perl v5.10.1 use threads; use threads::shared; #Without this line, perl crashes use warnings; use strict; use Imager; my $a=threads->create('d'); $a->join(); #No issues my $b=threads->create('d'); $b->join(); #This line blocks print('z'); sub d {}

Mon Nov 30 02:09:30 2009 TONYC [...] cpan.org - Status changed from 'new' to 'open'

Mon Nov 30 02:09:34 2009 TONYC [...] cpan.org - Taken

Mon Nov 30 02:45:52 2009 TONYC [...] cpan.org - Correspondence added

On Sun Nov 29 20:10:57 2009, K_Zennon wrote: Show quoted text

> While using Imager in conjunction with threads, and threads::shared, I > encountered an issue with joining threads. Specifically, the second > time I attempted to join a thread, the function blocked. > I'm on Win XP, using strawberry perl v5.10.1

Hi, In general Imager doesn't support threads, but I've done the minimum work to make sure it doesn't double free XS level objects on thread joins. I've uploaded Imager 0.71_01 with that change to let CPAN testers bang on it, but if you're inclined, you can build and test 0.71_01 yourself once it appears on your CPAN mirror. Thanks for your report Tony

Mon Dec 21 07:19:27 2009 TONYC [...] cpan.org - Correspondence added

On Sun Nov 29 20:10:57 2009, K_Zennon wrote: Show quoted text

> While using Imager in conjunction with threads, and threads::shared, I > encountered an issue with joining threads. Specifically, the second > time I attempted to join a thread, the function blocked. > I'm on Win XP, using strawberry perl v5.10.1 > > use threads; > use threads::shared; #Without this line, perl crashes > use warnings; > use strict; > > use Imager; > > my $a=threads->create('d'); > $a->join(); #No issues > my $b=threads->create('d'); > $b->join(); #This line blocks > print('z'); > > sub d {}

This problem has been fixed in Imager 0.72, though you will need to be using perl 5.8.8 or later for the fix to apply. Tony

Mon Dec 21 07:19:28 2009 TONYC [...] cpan.org - Status changed from 'open' to 'resolved'