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Thread::Semaphore
Thread-safe semaphores...
Perl module perl thread-safe thread-safe semaphores regulate access
Pipe-Sem
Pipe-Sem - Pollable Semaphores implementation for Unix systems....
implementation semaphores UNIX utility Pollable Semaphores Semaphores implementation
POSIX::RT::Semaphore
Perl interface to POSIX.1b semaphores...
Perl module perl Perl interface semaphores POSIX.1b semaphores