bool InstertNode(string& szFileName)
{
TiXmlDocument myDocument(szFileName);
bool loadOkay = myDocument.LoadFile();
if(loadOkay == false)
return false;
//获得根元素
TiXmlElement *rootElement = myDocument.RootElement();
if(rootElement == NULL)
return false;
//创建一个Person元素并连接。
TiXmlElement *PersonElement = new TiXmlElement("Person");
rootElement->LinkEndChild(PersonElement);
//设置Person元素的属性。
PersonElement->SetAttribute("ID", "3");
//创建name元素、age元素并连接。
TiXmlElement *NameElement = new TiXmlElement("name");
TiXmlElement *AgeElement = new TiXmlElement("age");
PersonElement->LinkEndChild(NameElement);
PersonElem ......
< id="MediaPlayerObject" style="visibility: hidden;" classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6" width="0" height="0" codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701">
1. 创建目录
mkdir
NO1. 在当前路径创建一级目录
[root@rehat root]# mkdir test
NO2. 在当前路径创建多级目录
[root@rehat root]# mkdir -p mytest/test1/test1_1
NO3. 在创建目录的同时给新建的目录赋权限
[root@rehat root]# mkdir -m 777 testmod
这样任何人对此目录都有任何权限
2. 复制文件与文件夹
cp
NO1. 复制指定目录的文件到当前目录，并重命名
& ......
how to install apache, PHP and MySQL on Linux
This tutorial explains the installation of Apache web server, bundled
with PHP and MySQL server on a Linux machine. The tutorial is primarily for SuSE
9.2, 9.3, 10.0 & 10.1, but most of the steps ought to be valid for all
Linux-like operating systems.
Contents:
MySQL 5 Installation
Apache 2 Installation
Prerequisites
Download Source
Unpack, Configure, Compile
Edit httpd.conf
Set up Access Privileges
Start and Stop Apache Server
Automatic Startup
PHP 5 Installation
apache 2 installation
prerequisites
Before you begin, it is highly recommended (though not inevitable) to create
a system user and user group under which your Apache server will be
running.
# groupadd www
# useradd -g www apache2
What is it good for? All actions performed by Apache (for instance your PHP
scripts execution) will be restricted by this user's privileges. Thus you can
explicitly rule which directories you ......
how to install apache, PHP and MySQL on Linux
This tutorial explains the installation of Apache web server, bundled
with PHP and MySQL server on a Linux machine. The tutorial is primarily for SuSE
9.2, 9.3, 10.0 & 10.1, but most of the steps ought to be valid for all
Linux-like operating systems.
Contents:
MySQL 5 Installation
Apache 2 Installation
Prerequisites
Download Source
Unpack, Configure, Compile
Edit httpd.conf
Set up Access Privileges
Start and Stop Apache Server
Automatic Startup
PHP 5 Installation
apache 2 installation
prerequisites
Before you begin, it is highly recommended (though not inevitable) to create
a system user and user group under which your Apache server will be
running.
# groupadd www
# useradd -g www apache2
What is it good for? All actions performed by Apache (for instance your PHP
scripts execution) will be restricted by this user's privileges. Thus you can
explicitly rule which directories you ......
how to install apache, PHP and MySQL on Linux
This tutorial explains the installation of Apache web server, bundled
with PHP and MySQL server on a Linux machine. The tutorial is primarily for SuSE
9.2, 9.3, 10.0 & 10.1, but most of the steps ought to be valid for all
Linux-like operating systems.
Contents:
MySQL 5 Installation
Apache 2 Installation
Prerequisites
Download Source
Unpack, Configure, Compile
Edit httpd.conf
Set up Access Privileges
Start and Stop Apache Server
Automatic Startup
PHP 5 Installation
apache 2 installation
prerequisites
Before you begin, it is highly recommended (though not inevitable) to create
a system user and user group under which your Apache server will be
running.
# groupadd www
# useradd -g www apache2
What is it good for? All actions performed by Apache (for instance your PHP
scripts execution) will be restricted by this user's privileges. Thus you can
explicitly rule which directories you ......
how to install apache, PHP and MySQL on Linux
This tutorial explains the installation of Apache web server, bundled
with PHP and MySQL server on a Linux machine. The tutorial is primarily for SuSE
9.2, 9.3, 10.0 & 10.1, but most of the steps ought to be valid for all
Linux-like operating systems.
Contents:
MySQL 5 Installation
Apache 2 Installation
PHP 5 Installation
Prerequisites
Download Source
Unpack, Configure, Compile
Edit httpd.conf
Create php.ini File
Restart Apache Server
PHP 5 installation
We will set up PHP as a shared module, being loaded into Apache2 dynamically
during the server startup. These instructions are known to work for PHP
versions: 5.0.4
through 5.2.1
.
prerequisites
At this point Apache web server must be installed. If you want MySQL support
in PHP, MySQL server also must have been installed prior to the next steps.
download source
Get the source from http://www.php.net/downloads.php
.
At the ......
how to install apache, PHP and MySQL on Linux
This tutorial explains the installation of Apache web server, bundled
with PHP and MySQL server on a Linux machine. The tutorial is primarily for SuSE
9.2, 9.3, 10.0 & 10.1, but most of the steps ought to be valid for all
Linux-like operating systems.
Contents:
MySQL 5 Installation
Apache 2 Installation
PHP 5 Installation
Prerequisites
Download Source
Unpack, Configure, Compile
Edit httpd.conf
Create php.ini File
Restart Apache Server
PHP 5 installation
We will set up PHP as a shared module, being loaded into Apache2 dynamically
during the server startup. These instructions are known to work for PHP
versions: 5.0.4
through 5.2.1
.
prerequisites
At this point Apache web server must be installed. If you want MySQL support
in PHP, MySQL server also must have been installed prior to the next steps.
download source
Get the source from http://www.php.net/downloads.php
.
At the ......
how to install apache, PHP and MySQL on Linux
This tutorial explains the installation of Apache web server, bundled
with PHP and MySQL server on a Linux machine. The tutorial is primarily for SuSE
9.2, 9.3, 10.0 & 10.1, but most of the steps ought to be valid for all
Linux-like operating systems.
Contents:
MySQL 5 Installation
Apache 2 Installation
PHP 5 Installation
Prerequisites
Download Source
Unpack, Configure, Compile
Edit httpd.conf
Create php.ini File
Restart Apache Server
PHP 5 installation
We will set up PHP as a shared module, being loaded into Apache2 dynamically
during the server startup. These instructions are known to work for PHP
versions: 5.0.4
through 5.2.1
.
prerequisites
At this point Apache web server must be installed. If you want MySQL support
in PHP, MySQL server also must have been installed prior to the next steps.
download source
Get the source from http://www.php.net/downloads.php
.
At the ......
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级别： 初级
郑彦兴 (mlinux@163.com), 国防科大攻读博士学位
2003 年 5 月 01 日
共享内存可以说是最有用的进程间通信方式，也是最快的IPC形式。两个不同进程A、B共享内存的意思是，同一块物理内存被映射到进程A、B各自的进程地址空间。进程A可以即时看到进程B对共享内存中数据的更新，反之亦然。由于多个进程共享同一块内存区域，必然需要某种同步机制，互斥锁和信号量都可以。
采用共享内存通信的一个显而易见的好处是效率高，因为进程可以直接读写内存，而不需要任何数据的拷贝。对于像管道和消息队列等通信方式，则需要在内核和用户空间进行四次的数据拷贝，而共享内存则只拷贝两次数据[1]：一次从输入文件到共享内存区，另一次从共享内存区到输出文件。实际上，进程之间在共享内存时，并不总是读写少量数据后就解除映射，有新的通信时，再重新建立共享内存区域。而是保持共享区域，直到通信完毕为止，这样，数据内容一直保存在共享内存中，并没有写回文件。共享内存中的内容往往是在解除映射时才写回文件的。因此，采用共享内存的通信方式效率是非常高的。
Linux的2.2.x内核支持多种共享内存方式，如mmap()系� ......
摘要：本章首先以应用程序开发者的角度审视Linux的进程内存管理，在此基础上逐步深入到内核中讨论系统物理内存管理和内核内存的使用方法。力求从外到内、水到渠成地引导网友分析Linux的内存管理与使用。在本章最后，我们给出一个内存映射的实例，帮助网友们理解内核内存管理与用户内存管理之间的关系，希望大家最终能驾驭Linux内存管理。
前言
内存管理一向是所有操作系统书籍不惜笔墨重点讨论的内容，无论市面上或是网上都充斥着大量涉及内存管理的教材和资料。因此，我们这里所要写的Linux内存管理采取避重就轻的策略，从理论层面就不去班门弄斧，贻笑大方了。我们最想做的和可能做到的是从开发者的角度谈谈对内存管理的理解，最终目的是把我们在内核开发中使用内存的经验和对Linux内存管理的认识与大家共享。
当然，这其中我们也会涉及到一些诸如段页等内存管理的基本理论，但我们的目的不是为了强调理论，而是为了指导理解开发中的实践，所以仅仅点到为止，不做深究。
遵循“理论来源于实践”的“教条”，我们先不必一下子就钻入内核里去看系统内存到底是如何管理，那样往往会让你陷入似懂非懂的窘境（我当年就犯了这个错误！）。所以最好的方� ......
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