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Home Backend Development PHP Tutorial pthreads - php线程安全是什么意思?

pthreads - php线程安全是什么意思?

Jun 06, 2016 pm 08:45 PM
php pthreads

php在编译安装的时候有这样一个选项--enable-maintainer-zts 英文解释是Enable thread safety - for code maintainers only!!
抽象理解线程安全为代码维护人员!
那么到底是啥意思呢?
并且在php5.3中添加线程模块pthreads 必须要PHP在编译的时候开启该选项

回复内容:

php在编译安装的时候有这样一个选项--enable-maintainer-zts 英文解释是Enable thread safety - for code maintainers only!!
抽象理解线程安全为代码维护人员!
那么到底是啥意思呢?
并且在php5.3中添加线程模块pthreads 必须要PHP在编译的时候开启该选项

线程安全解释:
从PHP5.2.10版本开始,有None-Thread Safe与Thread Safe两种版本的可供选择,这两种版本有何不同,作为使用者来说又应该如何选择呢?下面聚友将为您讲述。

先从字面意思上理解,None-Thread Safe就是非线程安全,在执行时不进行线程(thread)安全检查;Thread Safe就是线程安全,执行时会进行线程(thread)安全检查,以防止有新要求就启动新线程的 CGI 执行方式耗尽系统资源。

再来看PHP的两种执行方式:ISAPI和FastCGI。FastCGI执行方式是以单一线程来执行操作,所以不需要进行线程的安全检查,除去线程安全检查的防护反而可以提高执行效率,所以,如果是以 FastCGI(无论搭配 IIS 6 或 IIS 7)执行 PHP ,都建议下载、执行 non-thread safe 的 PHP (PHP 的二進位檔有兩種包裝方式:msi 、zip ,請下載 zip 套件)。而线程安全检查正是为ISAPI方式的PHP准备的,因为有许多php模块都不是线程安全的,所以需要使用Thread Safe的PHP。

说说你的疑问吧,首先这是和多线程有关系的,如果你要使用多线程(php的,如:pthreads),那么该参数是必须的。

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