PHP IPC函数，shm，shmop，message——共享内存函数，消息队列，与c/c++通讯

--enable-sysvsem.  信号量，个人感觉最好是无锁无信号设计速度更快

--enable-sysvshm.  shm*函数，将php变量放入共享内存，单一id可以插入多个php变量，自动序列化，用于php之间通讯

--enable-sysvmsg. 消息队列函数，无需手动控制内存大小，php之间通讯，（应该可以与c通讯，但是应该没有现成的c端代码）

 

以上，默认是开启的。

--enable-shmop shmop共享内存操作函数，可以与c/c++通讯

 

测试了消息队列（cli模式下），感觉非常适合php之间通讯，所以不研究shm了

 <?php
 /*
  * class msg
  * Use for communication between php and php;
  * Create at: 12:08 2012/10/31
  * Author: leixun([email protected])
  * version 1 - 14:01 2012/10/31
  */

 class msg{
     private $id;
     private $msg_id;
     private $_serialize = true;

     /**
      * @param $_id ID
      */
     public function msg($_id, $_serialize = true){
         $this->id = $_id;
         $this->msg_id = msg_get_queue ( $_id );
         $this->_serialize = $_serialize;
         if ($this->msg_id === false) {
             die(basename(__FILE__).'->'.__LINE__.': Unable to create message quee');
         }
     }

     /**
      * @data data to send
      * @type message type
      */
     public function send( $data, $type = 1, $blocking = false )
     {
         if (!msg_send ($this->msg_id, $type, $data, $this->_serialize, $blocking, $msg_err))
         {
             return "Msg not sent because $msg_err\n";
         }
         return true;
     }

     /**
      * @param $type message type
      * @param $maxsize The maximum size of message to be accepted,
      */
     public function receive($type = 1 , $maxsize = 1024 )
     {
         $rs = msg_receive ( $this->msg_id , $type ,  $type , $maxsize , $message , $this->_serialize, MSG_IPC_NOWAIT , $errorcode);
         if($rs)
             return $message;
         else
             return false;
     }

     public function remove()
     {
         msg_remove_queue($this->msg_id);
     }
 }

 

 <?php
 //写消息的进程
 define('base_path' , dirname(__FILE__));
 include(base_path.'/msg.php');

 $arr = array(999999999,999999999,999,999);
 $block_size = strlen(serialize($arr));

 $count = 1000;

 $msg = new msg(1);


 while(1){
     $arr = array(rand(1,999999999),rand(1,999999999),999,999);
     $msg->send($arr);
     sleep(rand(3,5));
 }
 echo 'Done';

 

 <?php
 //读消息的进程
 define('base_path' , dirname(__FILE__));
 include(base_path.'/msg.php');

 $arr = array(999999999,999999999,999,999);
 $block_size = strlen(serialize($arr));

 $count = 1000;

 $msg = new msg(1);


 while(1){

     var_dump($msg->receive());
     sleep(4);
 }