Viewing file:  wp-mutex.php (1.33 KB) -rw-r--r--
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<?php
if ( !class_exists('WPMutex') ):
class WPMutex {
/**
* Get an exclusive named lock.
*
* @param string $name
* @param integer $timeout
* @param bool $network_wide
* @return bool
*/
static function acquire($name, $timeout = 0, $network_wide = false){
global $wpdb; /* @var wpdb $wpdb */
if ( !$network_wide ){
$name = WPMutex::_get_private_name($name);
}
$state = $wpdb->get_var($wpdb->prepare('SELECT GET_LOCK(%s, %d)', $name, $timeout));
return $state == 1;
}
/**
* Release a named lock.
*
* @param string $name
* @param bool $network_wide
* @return bool
*/
static function release($name, $network_wide = false){
global $wpdb; /* @var wpdb $wpdb */
if ( !$network_wide ){
$name = WPMutex::_get_private_name($name);
}
$released = $wpdb->get_var($wpdb->prepare('SELECT RELEASE_LOCK(%s)', $name));
return $released == 1;
}
/**
* Given a generic lock name, create a new one that's unique to the current blog.
*
* @access private
*
* @param string $name
* @return string
*/
static function _get_private_name($name){
global $current_blog;
if ( function_exists('is_multisite') && is_multisite() && isset($current_blog->blog_id) ){
$name .= '-blog-' . $current_blog->blog_id;
}
return $name;
}
}
endif;
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