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//µ¥ÀýģʽµÄÀàLock
class
Lock
{
//¾²Ì¬ÊôÐÔ$instance
static
private
$instance
= NULL;
//Ò»¸öÆÕͨµÄ³ÉÔ±ÊôÐÔ
private
$switch
= 0;
//getInstance¾²Ì¬³ÉÔ±·½·¨
static
function
getInstance()
{
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if
(self::
$instance
== NULL)
{
self::$instance
=
new
Lock();
}
//·µ»Ø¶ÔÏóʵÀý
return
self::
$instance
;
}
//¿Õ¹¹Ô캯Êý
private
function
Lock()
{
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