NAME
Apache::Session::Lock::Ipc - Provides mutual exclusion using IPC
SYNOPSIS
use Apache::Session::Lock::Ipc;
my $locker = new Apache::Session::Lock::Ipc;
$locker->acquire_read_lock($ref);
$locker->acquire_write_lock($ref);
$locker->release_read_lock($ref);
$locker->release_write_lock($ref);
$locker->release_all_locks($ref);DESCRIPTION
Apache::Session::Lock::Ipc fulfills the locking interface of Apache::Session. Mutual exclusion is achieved through the use of shlock and shunlock functions of IPC::Shareable. Since this module does not support the notions of read and write locks, this module only supports write exclusive locks. When you request a shared read lock, nothing happens.
CONFIGURATION
This module must know the name of the "glue" (the id of the shared segment). By default, "SESS" is used.
Be carefull to the name used because it has to be composed by four characters. Example:
tie %hash, 'Apache::Session::Ipc', $id, {
IpcName => 'SESS',
};You can also add other IPC::Shareable options using the "IpcOptions" option. Example:
tie %s, 'Apache::Session::Ipc', undef,
{IpcName => 'SESS',
IpcOptions => {mode => 0600}
};AUTHOR
This module was written by Xavier Guimard <x.guimard@free.fr>
COPYRIGHT AND LICENSE
Copyright (C) 2005 by Xavier Guimard
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.4 or, at your option, any later version of Perl 5 you may have available.