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vendor/swoole/examples/lock/lock.php

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+<?php
+/**
+ * SWOOLE_MUTEX 互斥锁
+ * SWOOLE_FILELOCK 文件锁，需要在第二个参数传入一个锁文件
+ * SWOOLE_SPINLOCK 自旋锁(请查看swoole扩展信息，检测是否支持)
+ * SWOOLE_SEM 信号量
+ * SWOOLE_RWLOCK 读写锁
+ */
+
+$lock = new swoole_lock(SWOOLE_MUTEX);
+echo "[Master]create lock\n";
+$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";
+