in reply to Test::More and semaphore handles on Windows

Test::Builder keeps around information about each test executed to do its reporting at the end of the test file. This is effectively global data.

So that Test::Builder can work with tests that use thread (or tests for code that uses thread), it has to make sure that that global data is thread-safe, hence the use of sharing.

This is only an issue with ithreads, so it only affects Perls of 5.7.x and later.

  • Comment on Re: Test::More and semaphore handles on Windows

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Re^2: Test::More and semaphore handles on Windows
by blm (Hermit) on Aug 25, 2004 at 05:27 UTC
    As I understand it, the problem related to Test::Builder will affect 5.8 and later because the current version of Test::Builder checks that perl version is greater then 5.008 before it enables this thread safety. From Test::Builder: 
    BEGIN {
    use Config;
    if( $] >= 5.008 && $Config{useithreads} ) {
        require threads;
        require threads::shared;
        threads::shared->import;
    }
    else {
        *share = sub { 0 };
        *lock  = sub { 0 };
    }
}

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    Is this correct?
[reply]
[d/l]

      Yes, that's correct, because Perl 5.7.x switched to a different threading model.

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