NAME

Scaffold::Lockmgr::UnixMutex - Use SysV semaphores for resource locking.

SYNOPSIS

 use Scaffold::Server;
 use Scaffold::Lockmgr::UnixMutex;

 my $psgi_handler;

 main: {

    my $server = Scaffold::Server->new(
        lockmgr => Scaffold::Lockmgr::UnixMutex->new(
            key     => 1234,
            nsems   => 32,
            timeout => 10,
            limit   => 10
        },
    );

    $psgi_hander = $server->engine->psgi_handler();

 }

DESCRIPTION

This implenments general purpose resource locking with SysV semaphores.

CONFIGURATION

key

This is a numeric key to identify the semaphore set. The default is a hash of "scaffold".

nsems

The number of semaphores in the semaphore set. The default is dependent on platform.

    linux - 250
    aix   - 250
    bsd   - 8
    other - 16

timeout

The number of seconds to sleep if the lock is not available. Default is 10 seconds.

limit

The number of attempts to try the lock. If the limit is passed an exception is thrown. The default is 10.

uid

The uid used to create the semaphores and shared memory segments. Defaults to effetive uid.

gid

The gid used to create the semaphores and shared memory segments. Defaults to effetive gid.

mode

The access permissions which are used by the semaphores and shared memory segments. Defaults to ( 0666 | IPC_CREAT ).

SEE ALSO

 Scaffold
 Scaffold::Base
 Scaffold::Cache
 Scaffold::Cache::FastMmap
 Scaffold::Cache::Manager
 Scaffold::Cache::Memcached
 Scaffold::Class
 Scaffold::Constants
 Scaffold::Engine
 Scaffold::Handler
 Scaffold::Handler::Default
 Scaffold::Handler::Favicon
 Scaffold::Handler::Robots
 Scaffold::Handler::Static
 Scaffold::Lockmgr
 Scaffold::Lockmgr::KeyedMutex
 Scaffold::Lockmgr::UnixMutex
 Scaffold::Plugins
 Scaffold::Render
 Scaffold::Render::Default
 Scaffold::Render::TT
 Scaffold::Routes
 Scaffold::Server
 Scaffold::Session::Manager
 Scaffold::Stash
 Scaffold::Stash::Controller
 Scaffold::Stash::Cookie
 Scaffold::Stash::View
 Scaffold::Uaf::Authenticate
 Scaffold::Uaf::AuthorizeFactory
 Scaffold::Uaf::Authorize
 Scaffold::Uaf::GrantAllRule
 Scaffold::Uaf::Login
 Scaffold::Uaf::Logout
 Scaffold::Uaf::Manager
 Scaffold::Uaf::Rule
 Scaffold::Uaf::User
 Scaffold::Utils

AUTHOR

Kevin L. Esteb, <kevin@kesteb.us>

COPYRIGHT AND LICENSE

Copyright (C) 2010 by Kevin L. Esteb

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.5 or, at your option, any later version of Perl 5 you may have available.