仓库初始化

addons/crontab/library/SimpleFork/Cache/SharedMemory.php

@@ -0,0 +1,176 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Jenner
+ * Date: 2015/8/12
+ * Time: 15:00
+ */
+
+namespace Jenner\SimpleFork\Cache;
+
+
+/**
+ * shared memory cache
+ *
+ * @package Jenner\SimpleFork\Cache
+ */
+class SharedMemory implements CacheInterface
+{
+    /**
+     * holds shared memory resource
+     * @var resource
+     */
+    protected $shm;
+
+    /**
+     * shared memory ipc key
+     * @var string
+     */
+    protected $client_count_key = 'system_client_count';
+
+    /**
+     * memory size
+     * @var int
+     */
+    protected $size;
+
+    /**
+     * @param int $size memory size
+     * @param string $file
+     */
+    public function __construct($size = 33554432, $file = __FILE__)
+    {
+        $this->size = $size;
+        if (function_exists("shm_attach") === false) {
+            $message = "\nYour PHP configuration needs adjustment. " .
+                "See: http://us2.php.net/manual/en/shmop.setup.php. " .
+                "To enable the System V shared memory support compile " .
+                " PHP with the option --enable-sysvshm.";
+
+            throw new \RuntimeException($message);
+        }
+        $this->attach($file); //create resources (shared memory)
+    }
+
+    /**
+     * connect shared memory
+     *
+     * @param string $file
+     */
+    public function attach($file = __FILE__)
+    {
+        if (!file_exists($file)) {
+            $touch = touch($file);
+            if (!$touch) {
+                throw new \RuntimeException("file is not exists and it can not be created. file: {$file}");
+            }
+        }
+        $key = ftok($file, 'a');
+        $this->shm = shm_attach($key, $this->size); //allocate shared memory
+    }
+
+    /**
+     * remove shared memory.
+     * you should know that it maybe does not work.
+     *
+     * @return bool
+     */
+    public function remove()
+    {
+        //dallocate shared memory
+        if (!shm_remove($this->shm)) {
+            return false;
+        }
+        $this->dettach();
+        // shm_remove maybe not working. it likes a php bug.
+        unset($this->shm);
+
+        return true;
+    }
+
+    /**
+     * @return bool
+     */
+    public function dettach()
+    {
+        return shm_detach($this->shm); //allocate shared memory
+    }
+
+    /**
+     * set var
+     *
+     * @param $key
+     * @param $value
+     * @return bool
+     */
+    public function set($key, $value)
+    {
+        return shm_put_var($this->shm, $this->shm_key($key), $value); //store var
+    }
+
+    /**
+     * generate shm key
+     *
+     * @param $val
+     * @return mixed
+     */
+    public function shm_key($val)
+    {   // enable all world langs and chars !
+        // text to number system.
+        return preg_replace("/[^0-9]/", "", (preg_replace("/[^0-9]/", "", md5($val)) / 35676248) / 619876);
+    }
+
+    /**
+     * get var
+     *
+     * @param $key
+     * @param null $default
+     * @return bool|mixed
+     */
+    public function get($key, $default = null)
+    {
+        if ($this->has($key)) {
+            return shm_get_var($this->shm, $this->shm_key($key));
+        } else {
+            return $default;
+        }
+    }
+
+    /**
+     * has var ?
+     *
+     * @param $key
+     * @return bool
+     */
+    public function has($key)
+    {
+        if (shm_has_var($this->shm, $this->shm_key($key))) { // check is isset
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * delete var
+     *
+     * @param $key
+     * @return bool
+     */
+    public function delete($key)
+    {
+        if ($this->has($key)) {
+            return shm_remove_var($this->shm, $this->shm_key($key));
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * init when wakeup
+     */
+    public function __wakeup()
+    {
+        $this->attach();
+    }
+}