74 lines
1.5 KiB
PHP
74 lines
1.5 KiB
PHP
<?php
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require_once('_common.php');
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require_once(ROOT.'/f_config/config.php');
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class _Lock {
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private static $l = ROOT.W.'lock.txt';
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public static function Busy() {
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$fp = fopen(_Lock::$l, 'r');
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$lock = fread($fp, 1);
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fclose($fp);
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if($lock == 1) return true;
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else return false;
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}
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private static function LockFile() {
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$fp = fopen(_Lock::$l, 'r');
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$lock = fread($fp, 1);
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fclose($fp);
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if($lock == 1) return false;
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$fp = fopen(_Lock::$l, 'w');
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if(!flock($fp, LOCK_EX)) { return false; }
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fwrite($fp, '1');
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fclose($fp);
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flock($fp, LOCK_UN);
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return true;
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}
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private static function UnlockFile() {
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$fp = fopen(_Lock::$l, 'r');
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$lock = fread($fp, 1);
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fclose($fp);
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if($lock == 0) return false;
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$fp = fopen(_Lock::$l, 'w');
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if(!flock($fp, LOCK_EX)) { return false; }
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fwrite($fp, '0');
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fclose($fp);
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flock($fp, LOCK_UN);
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return true;
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}
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public static function Lock() {
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/*
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// 키 생성
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$key = fileinode(_Lock::$l);
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// 뮤텍스 획득
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$mutex = sem_get($key);
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// 락 획득
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sem_acquire($mutex);
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*/
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// 파일에 잠금 걸기
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return _Lock::LockFile();
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}
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public static function Unlock() {
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// 파일에 잠금 풀기
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$res = _Lock::UnlockFile();
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/*
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// 락 해제
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sem_release($mutex);
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*/
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return $res;
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}
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}
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