PHP 多线程扩展（正儿八经的线程）pthreads安装

环境CentOS 6.3 64bit，php 5.4.5

 

pthreads需要线程安全环境，

 

下载php的安装包，解压：

 

  tar zxvf php-5.4.5.tar.gz//名字是不是这个我不确定，自己去下载

 

安装：

 

./configure --enable-zts --prefix=/usr/local/php-zts

 

make

 

make install

 

结果就把线程安装版的php安装到了/usr/local/php-zts，目前我不了解开启线程安全到底会带来什么影响，所以，就弄两个测试版本。

 

下载和安装pthreads:

 

tar zxvf pthreads

 

cd pthreads-0.0.45 // 本文的是第一个stable版本

 

/usr/local/php-zts/bin/phpize

./configure --with-php-config=/usr/local/php-zts/bin/php-config

make

make install

 

 

 

/usr/local/php-zts/bin/php -igrep "php.ini"

找出php.ini的位置，修改它把ext=pthreads.so加入进入进去，因为我原来就有php，现在新装的php.ini文件不存在我就考了一个过去……

 

pthreads-0.0.45/examples目录下有些示例文件，比文档有用，在线文档根本不能说明问题，我修改了一个，执行了一下：

 
<?php  
/* 
* Sharing symbols 101 
* @NOTE Thread::fetch was never included in a release and was superceeded by object handlers 
*   pthreads allows read access to thread data from any context 
    pthreads allows write access to thread data from any context 
    carry on reading ... 
    work in progress ... 
*/  
class TestObject {  
    public $val;  
}  
  
class Fetching extends Thread {  
    public function run(){  
        /* 
        * of course ... 
        */  
        $this->sym = 10245;  
        $this->arr = array(  
            "1", "2", "3"  
        );  
        echo &#39;6&#39;.chr(10);  
        /* 
        * objects do work, no preparation needed ... 
        * read/write objects isn&#39;t finalized .. 
        * so do the dance to make it work ... 
        */  
        $obj = new TestObject();  
        $obj->val = "testval";  
        $this->obj = $obj;  
        echo &#39;7&#39;.chr(10);  
        /* 
        * will always work 
        */  
        $this->objs = serialize($this->obj);  
        echo &#39;8&#39;.chr(10);  
        /* 
        * nooooooo 
        */  
        $this->res = fopen("php://stdout", "w");  
        echo &#39;9&#39;.chr(10);  
        /* 
        * tell the waiting process we have created symbols and fetch will succeed 
        */  
        $this->synchronized(function(){  
            $this->notify();  
        });  
        echo &#39;10&#39;.chr(10);  
        /* wait for the process to be finished with the stream */  
        $this->synchronized(function(){  
            $this->wait();  
        });  
        echo &#39;11&#39;.chr(10);  
    }  
}  
echo &#39;0&#39;.chr(10);  
$thread = new Fetching();  
echo &#39;1&#39;.chr(10);  
$thread->start();  
//sleep(1); 加了这个就不能正常工作，真奇怪  
echo &#39;2&#39;.chr(10);  
$thread->synchronized(function($me){  
    echo &#39;3&#39;.chr(10);  
    $me->wait();  
    echo &#39;4&#39;.chr(10);  
}, $thread);  
echo &#39;5&#39;.chr(10);  
  
/* 
* we just got notified that there are symbols waiting 
*/  
foreach(array("sym", "arr", "obj", "objs", "res") as $symbol){  
    printf("\$thread->%s: ", $symbol);     
    $fetched = $thread->$symbol;  
    if ($fetched) {  
        switch($symbol){  
            /* 
            * manual unserialize 
            */  
            case "objs":  
                var_dump(unserialize($fetched));  
            break;  
              
            default: var_dump($fetched);  
        }  
    }  
    printf("\n");  
}  
  
/* notify the thread so it can destroy resource */  
$thread->synchronized(function($me){  
    $me->notify();  
}, $thread);  
?>  

/usr/local/php-zts/bin/php Fetch.php

结果：

0
1
2
3
6
7
8
9
10
4
5
$thread->sym: int(10245)
 
$thread->arr: array(3) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "2"
  [2]=>
  string(1) "3"
}
 
$thread->obj: object(TestObject)#2 (1) {
  ["val"]=>
  string(7) "testval"
}
 
$thread->objs: object(TestObject)#2 (1) {
  ["val"]=>
  string(7) "testval"
}
 
$thread->res: resource(3) of type (stream)
 
11