Util::Semaphore(3) User Contributed Perl Documentation Util::Semaphore(3)

# [NAME](#NAME)

Log::Log4perl::Util::Semaphore - Easy to use semaphores

# [SYNOPSIS](#SYNOPSIS)

```
    use Log::Log4perl::Util::Semaphore;
    my $sem = Log::Log4perl::Util::Semaphore->new( key => "abc" );
    $sem->semlock();
      # ... critical section 
    $sem->semunlock();
    $sem->semset( uid  => (getpwnam("hugo"))[2], 
                  gid  => 102,
                  mode => 0644
                );
```

# [DESCRIPTION](#DESCRIPTION)

Log::Log4perl::Util::Semaphore provides the synchronisation mechanism for the Synchronized.pm appender in Log4perl, but can be used independently of Log4perl.

As a convenience, the "uid" field accepts user names as well, which it translates into the corresponding uid by running "getpwnam".

# [LICENSE](#LICENSE)

Copyright 2002-2026 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

2026-08-17 perl v5.44.0

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Document: Log::Log4perl::Util::Semaphore(3pm) from perl-log-log4perl 1.58-r1 (Chainguard OS)
Source: https://github.com/mschilli/log4perl.git