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.\" ========================================================================
.\"
.IX Title "Apache::Session::Lock::Sybase 3pm"
.TH Apache::Session::Lock::Sybase 3pm "2020-09-20" "perl v5.30.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Apache::Session::Lock::Sybase \- Provides mutual exclusion using Sybase
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use Apache::Session::Lock::Sybase;
\&
\& my $locker = Apache::Session::Lock::Sybase\->new;
\&
\& $locker\->acquire_read_lock($ref);
\& $locker\->acquire_write_lock($ref);
\& $locker\->release_read_lock($ref);
\& $locker\->release_write_lock($ref);
\& $locker\->release_all_locks($ref);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Apache::Session::Lock::Sybase fulfills the locking interface of 
Apache::Session.  Mutual exclusion is achieved through the use of Sybase's
sp_getapplock and sp_releaseapplock functions. Sybase does not support the
notion
of read and write locks, so this module only supports exclusive locks.  When
you request a shared read lock, it is instead promoted to an exclusive
write lock.
.SH "CONFIGURATION"
.IX Header "CONFIGURATION"
The module must know how to connect to your MySQL database to acquire locks.
You must provide a datasource name, a user name, and a password.  These options
are passed in the usual Apache::Session style, and are very similar to the
options for Apache::Session::Store::Sybase.  Example:
.PP
.Vb 5
\& tie %hash, \*(AqApache::Session::Sybase\*(Aq, $id, {
\&     LockDataSource => \*(Aqdbi:sybase:database\*(Aq,
\&     LockUserName   => \*(Aqdatabase_user\*(Aq,
\&     LockPassword   => \*(AqK00l\*(Aq
\& };
.Ve
.PP
Instead, you may pass in an already opened \s-1DBI\s0 handle to your database.
.PP
.Vb 3
\& tie %hash, \*(AqApache::Session::Sybase\*(Aq, $id, {
\&     LockHandle => $dbh
\& };
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
This module was written by Oliver Maul <oli@42.nu>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Apache::Session