function &getInstance($blocking = null, $seed = null)
{
static $instances;
if (!isset($instances)) {
$instances = array();
}
$signature = serialize(array($blocking, $seed));
if (!array_key_exists($signature, $instances)) {
do {
if (is_null($seed)) {
if (preg_match('/^win/i', PHP_OS)) {
include_once FREEBEER_BASE . '/lib/Random/Win32.php';
if (fbRandom_Win32::isAvailable()) {
$classname = 'fbRandom_Win32';
break;
}
} else {
if ($blocking) {
include_once FREEBEER_BASE . '/lib/Random/DevRandom.php';
if (fbRandom_DevRandom::isAvailable()) {
$classname = 'fbRandom_DevRandom';
break;
}
}
include_once FREEBEER_BASE . '/lib/Random/DevUrandom.php';
if (fbRandom_DevUrandom::isAvailable()) {
$classname = 'fbRandom_DevUrandom';
break;
}
}
}
include_once FREEBEER_BASE . '/lib/Random/MT_Rand.php';
$classname = 'fbRandom_MT_Rand';
} while (false);
$instances[$signature] = new $classname($seed);
if (!is_null($seed)) {
$instance =& $instances[$signature];
$instance->setSeed($seed);
}
}
return $instances[$signature];
}
function isAvailable()
{
return fbRandom_DevUrandom::isAvailable();
}