SyncReaderWriter::__construct

(PECL sync >= 1.0.0)

SyncReaderWriter::__construct — Constructs a new SyncReaderWriter object

说明

public SyncReaderWriter::__construct(string $name = ?, int $autounlock = 1)

Constructs a named or unnamed reader-writer object.

参数

name: The name of the reader-writer if this is a named reader-writer object.

注意:
If the name already exists, it must be able to be opened by the current user that the process is running as or an exception will be thrown with a meaningless error message.

注意: On Windows, name must not contain backslashes.
autounlock: Specifies whether or not to automatically unlock the reader-writer at the conclusion of the PHP script.

警告
If an object is: A named reader-writer with an autounlock of FALSE, the object is locked for either reading or writing, and the PHP script concludes before the object is unlocked, then the underlying objects will end up in an inconsistent state.

返回值

The new SyncReaderWriter object.

错误／异常

An exception is thrown if the reader-writer cannot be created or opened.

范例

示例 #1 SyncReaderWriter::__construct() example


<?php
$readwrite = new SyncReaderWriter("FileCacheLock");
$readwrite->readlock();
/* ... */
$readwrite->readunlock();

$readwrite->writelock();
/* ... */
$readwrite->writeunlock();
?>

参见

SyncReaderWriter::readlock() - Waits for a read lock
SyncReaderWriter::readunlock() - Releases a read lock
SyncReaderWriter::writelock() - Waits for an exclusive write lock
SyncReaderWriter::writeunlock() - Releases a write lock

add a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址：https://www.php.net/manual/en/syncreaderwriter.construct.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP获取指定函数定义在哪个文件中及行号 PHP mkdir()写出来的权限与mode值不符合 adodb连接mysql多个数据库的问题 composer基本用法利用PHP SOAP实现WEB SERVICE

略微加速

PHP官方手册 - 互联网笔记

SyncReaderWriter::__construct

说明

参数

返回值

错误／异常

范例

参见

User Contributed Notes