# Lock swoole1.6.4版本增加了锁的实现。PHP代码中可以很方便地创建一个锁，用来实现数据同步。swoole_lock类支持5种锁的类型： 1. 文件锁 SWOOlE_FILELOCK 1. 读写锁 SWOOLE_RWLOCK 1. 信号量 SWOOLE_SEM 1. 互斥锁 SWOOLE_MUTEX 1. 自旋锁 SWOOlE_SPINLOCK ### 示例： ~~~ $lock = new swoole_lock(SWOOLE_MUTEX); echo "[Master]create lock\n"; $lock->lock(); if(pcntl_fork() > 0) { sleep(1); $lock->unlock(); } else { echo "[Child] Wait Lock\n"; $lock->lock(); echo "[Child] Get Lock\n"; $lock->unlock(); exit("[Child] exit\n"); } echo "[Master]release lock\n"; unset($lock); sleep(1); echo "[Master]exit\n"; ~~~ |  Swoole流程 | |-----|