php多线程访问数组变量 [英] php mutilthreading accessing a array variables

问题描述

如何使用 pthread 访问数组变量，我创建了一个线程类名称 "AccessVariable"，其任务是创建 4 个线程并访问名为 "$arr"，需要一些关于如何实现这一点的指针，因为我对这个编码很陌生

How to access a array variables using pthread, i have created a thread class names "AccessVariable", whoose task is to create 4 thread and access the array named "$arr", need some pointer on how to acieve this as i 'm very new in this coding

<?php
error_reporting(E_ALL | E_STRICT);
ini_set('display_errors', true);
class AccessVariable extends Thread {
    public $arr = array("12","33","21","3211","3214","34","23423");  
    public function __construct($arg) {
        $this->arg = $arg;
    }
    public function run() {
        if ($this->arg) {
            $tmp_value = $this->getValue();
            printf('%s: %s %d -finish' . "\n", date("g:i:sa"), $this->arg, $tmp_value);
        }
        $this->synchronized(function($thread) {
                    $thread->getValue();
                }, $this);
    }
    public function getValue() {
        //Get Array Variable
    }
}
// Create a array
$stack = array();
//Iniciate Miltiple Thread
foreach (range("A", "D") as $i) {
    $stack[] = new AccessVariable($i);
}
// Start The Threads
foreach ($stack as $t) {
    $t->start();
}
?>

推荐答案

一些您会发现有用的观察:

Some observations you will find useful:

• 不支持类条目默认值 - zend 有对象处理程序但没有条目处理程序，当一个条目被声明时，对象处理程序显然不适合调用，因为它们与实例一起工作.要解决此问题，请在构造函数中设置默认值.
• 用于在多个上下文之间共享的变量应该扩展 pthreads 定义；pthreads 对象作为对象运行，并关联数组和索引列表，这些东西的默认 PHP 实现没有为多线程做好准备.
• 同步对象仅在您打算在同步块中使用同步方法时才有用(php 中的闭包/函数)；仅在您打算等待时进行同步，或通知其他等待和反对的人

-

<?php
error_reporting(E_ALL | E_STRICT);
ini_set('display_errors', true);

class SharedArray extends Stackable {
    public function __construct($array) {
        $this->merge($array);
    }

    public function run(){}
}


class AccessSharedArray extends Thread {
    public $shared;
    public $arg;

    public function __construct($shared, $arg) {
        $this->shared = $shared;
        $this->arg = $arg;
    }

    public function run() {
        if ($this->arg) {
            $tmp_value = $this->shared[$this->arg];
            printf('%s: %s %d -finish' . "\n", date("g:i:sa"), $this->arg, $tmp_value);
        }
    }
}

$shared = new SharedArray(
    array("12","33","21","3211","3214","34","23423"));
// Create a array
$stack = array();

foreach (range(0, 3) as $i) {
    $stack[] = new AccessSharedArray($shared, $i);
}

// Start The Threads
foreach ($stack as $t) {
    $t->start();
}

foreach ($stack as $t)
    $t->join();
?>

github 上有很多示例并包含在发行版中，以帮助您充分了解 pthread 以使用它.多线程不像使用新的数据库或 http 客户端.它既复杂又强大，我恳请您仔细阅读包含的每个示例，即使您认为它与手头的任务无关；无论如何，这些知识都会为您服务.

There are many examples on github and included in the distribution to help you to get to know pthreads well enough to use it. Multi-threading is not like using a new database, or http client. It is complex and powerful, I implore you to read carefully and fully every example included even if you think it is irrelevant to the task at hand; the knowledge will serve you well whatever.

除了示例之外，github上过去的错误报告中有很多信息，因此如果您遇到问题并且示例中似乎没有解决方案，请在报告任何错误之前搜索github上的问题列表.

In addition to examples, there is much info in past bug reports on github, so if you have a problem and there doesn't seem to be a solution in an example then search the issues list on github before reporting any bugs.

这篇关于php多线程访问数组变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！