POSIX::RT::Semaphore Perl interface to POSIX.1b semaphores
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POSIX::RT::Semaphore Ranking & Summary

POSIX::RT::Semaphore Tags

Perl module perl Perl interface semaphores POSIX.1b semaphores POSIX.1b

POSIX::RT::Semaphore Description

Perl interface to POSIX.1b semaphores POSIX::RT::Semaphore is a Perl module that provides an object-oriented Perl interface to POSIX.1b Realtime semaphores, as supported by your system. A POSIX semaphore (herein: psem) is a high-performance, persistent synchronization device.Unnamed psems are typically used for synchronization between the threads of a single process, or between a set of related processes which have inherited the psem from a common ancestor. Named psems are typically used for interprocess synchronization, but may also serve interthreaded designs.SYNOPSIS use POSIX::RT::Semaphore; use Fcntl; # O_CREAT, O_EXCL for named semaphore creation ## unnamed semaphore, initial value 1 $sem = POSIX::RT::Semaphore->init(0, 1); ## named semaphore, initial value 1 $nsem = POSIX::RT::Semaphore->open("/mysem", O_CREAT, 0660, 1); ## method synopsis $sem->wait; # down (P) operation ... protected section ... $sem->post; # up (V) operation if ($sem->trywait) { # non-blocking wait (trydown) ... protected section ... $sem->post; } $sem->timedwait(time() + 10); # wait up to 10 seconds Requirements: · Perl

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