Wed, 01 Apr 2009 23:04:00 GMTkeep eyes on the star and feet on the ground !http://blog.csdn.net/future_fighter/http://blog.csdn.net/future_fighter/archive/2009/04/01/4042197.aspxhttp://blog.csdn.net/future_fighter/comments/4042197.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/4042197.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=4042197Kernel. EXPORT_SYMBOL解析 Code Segment： include/module.h: struct kernel_symbol {    unsigned long value;       const char *name;};/* For every exported symbol, place a struct in the __ksymtab section */#define __EXPORT_SYMBOL(sym, sec)               \    __CRC_SYMBOL(sym, sec)                  \    static const char __kstrtab_##sym[]         \    __attribute__((section("__ksymtab_strings")))       \    = MODULE_SYMBOL_P<img src ="http://blog.csdn.net/future_fighter/aggbug/4042197.aspx" width = "1" height = "1" />Thu, 02 Apr 2009 07:04:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/04/01/4042197.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/04/01/4042197.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/04/01/4042197.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265547/1296217http://blog.csdn.net/future_fighter/archive/2009/02/26/3940443.aspxhttp://blog.csdn.net/future_fighter/comments/3940443.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3940443.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3940443Linux是一个多用户、多任务的操作系统。多用户是指多个用户可以在同一时间使用计算机系统；多任务是指Linux可以同时执行几个任务，它可以在还未执行完一个任务时又执行另一项任务。在操作系统设计上，从进程（Process）演化出线程（Thread），最主要的目的就是更好地支持多处理器，并且减小（进程/线程）上下文切换的开销。<img src ="http://blog.csdn.net/future_fighter/aggbug/3940443.aspx" width = "1" height = "1" />Fri, 27 Feb 2009 03:33:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/26/3940443.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/26/3940443.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/26/3940443.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265548/1296217http://blog.csdn.net/future_fighter/archive/2009/02/18/3907085.aspxhttp://blog.csdn.net/future_fighter/comments/3907085.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3907085.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3907085POSIX定义的线程属性有：可分离状态（detachstate）, 线程栈大小（stacksize）,线程栈地址（ stackaddr）,作用域（scope）, 继承调度（inheritsched）, 调度策略（schedpolicy）和调度参数（ schedparam）。 有些系统并不支持所有这些属性，使用前注意查看系统文档。<img src ="http://blog.csdn.net/future_fighter/aggbug/3907085.aspx" width = "1" height = "1" />Thu, 19 Feb 2009 03:31:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/18/3907085.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/18/3907085.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/18/3907085.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265549/1296217http://blog.csdn.net/future_fighter/archive/2009/02/16/3897183.aspxhttp://blog.csdn.net/future_fighter/comments/3897183.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3897183.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3897183有些事需要一次且仅需要一次执行。通常当初始化应用程序时，可以比较容易地将其放在main函数中。但当你写一个库时，就不能在main里面初始化了，你可以用静态初始化，但使用一次初始化（pthread_once_t）会比较容易些。<img src ="http://blog.csdn.net/future_fighter/aggbug/3897183.aspx" width = "1" height = "1" />Tue, 17 Feb 2009 02:27:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/16/3897183.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/16/3897183.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/16/3897183.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265550/1296217http://blog.csdn.net/future_fighter/archive/2009/02/12/3883415.aspxhttp://blog.csdn.net/future_fighter/comments/3883415.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3883415.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3883415当线程互斥地访问一些共享的状态时，往往会有些线程需要等到这些状态改变后才应该继续执行。如：有一个共享的队列，一个线程往队列里面插入数据，另一个线程从队列中取数据，当队列为空的时候，后者应该等待队列里面有值才能取数据。而共享数据（队列）应该用mutex来保护，为了检查共享数据的状态（队列是否为空），线程必须先锁定mutex，然后检查，最后解锁mutex。<img src ="http://blog.csdn.net/future_fighter/aggbug/3883415.aspx" width = "1" height = "1" />Fri, 13 Feb 2009 04:28:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/12/3883415.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/12/3883415.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/12/3883415.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265551/1296217http://blog.csdn.net/future_fighter/archive/2009/02/11/3878386.aspxhttp://blog.csdn.net/future_fighter/comments/3878386.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3878386.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3878386并行的世界，没有同步，就失去了秩序，就会乱作一团！试想，交通没有红绿灯，生产线产品装配没有一定的顺序... 结果是显而易见的。多个线程也需要同步，否则程序运行起来结果不可预测，这是我们最不能容忍的。交通的同步机制就是红绿灯，Pthread提供了互斥量（mutex）和条件变量（Condition Variables）两种机制去同步线程。<img src ="http://blog.csdn.net/future_fighter/aggbug/3878386.aspx" width = "1" height = "1" />Thu, 12 Feb 2009 03:30:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/11/3878386.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/11/3878386.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/11/3878386.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265552/1296217http://blog.csdn.net/future_fighter/archive/2009/02/10/3875057.aspxhttp://blog.csdn.net/future_fighter/comments/3875057.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3875057.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3875057我们每个人都并行地活在这个世界上 ，每一天每个人都干着不同的事情。每个人的人生都是不同的，从出生 -> 活着 -> 死去， 个中滋味，只能自己体味了。我们的线程兄弟也一样，只不过它的环境没有人类社会这么复杂，它的一生，被操作系统控制，被我们程序员控制着！呵呵,想想都觉得这兄弟可怜啊！不过这哥们可不许小瞧了，功能大了去了！具体线程的定义和好处参考其它关于线程的资料。该篇主要讲线程兄弟的大体的一生（从被创建到销毁）。进入正题：<img src ="http://blog.csdn.net/future_fighter/aggbug/3875057.aspx" width = "1" height = "1" />Wed, 11 Feb 2009 03:41:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/10/3875057.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/10/3875057.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/10/3875057.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265553/1296217http://blog.csdn.net/future_fighter/archive/2009/02/07/3867790.aspxhttp://blog.csdn.net/future_fighter/comments/3867790.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3867790.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3867790硬盘（英语：Hard Disk Drive，简称HDD）是电脑上使用坚硬的旋转盘片为基础的非挥发性（non-volatile）存储设备。它在平整的磁性表面存储和检索数字数据。信息通过离磁性表面很近的写头，由电磁流来改变极性方式被电磁流写到磁盘上。信息可以通过相反的方式回读，例如磁场导致线圈中电气的改变或读头经过它的上方。早期的硬盘储存媒介是可替换的，不过今日典型的硬盘是固定的储存媒介，被封在硬盘里 （除了一个过滤孔，用来平衡空气压力）。<img src ="http://blog.csdn.net/future_fighter/aggbug/3867790.aspx" width = "1" height = "1" />Sun, 08 Feb 2009 02:19:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/07/3867790.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/07/3867790.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/07/3867790.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265554/1296217http://blog.csdn.net/future_fighter/archive/2009/02/06/3866073.aspxhttp://blog.csdn.net/future_fighter/comments/3866073.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3866073.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3866073当 Linux 内核启动系统时，它必须找到并执行第一个用户程序，通常是 init。用户程序存在于文件系统，故 Linux 内核必须找到并挂载上第一个(根)文件系统，方能成功开机。通常，可用的文件系统都列在 /etc/fstab，所以 mount 可以找到它们。但 /etc/fstab 它本身就是一个文件，存在于文件系统中。找到第一个文件系统成为鸡生蛋蛋生鸡的问题，而且为了解决它，内核开发者建立内核命令列选项 root=，用来指定 root 文件系统存在于哪个设备上。<img src ="http://blog.csdn.net/future_fighter/aggbug/3866073.aspx" width = "1" height = "1" />Fri, 06 Feb 2009 22:00:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/06/3866073.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/06/3866073.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/06/3866073.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265555/1296217http://blog.csdn.net/future_fighter/archive/2009/02/06/3866068.aspxhttp://blog.csdn.net/future_fighter/comments/3866068.aspx0http://blog.csdn.net/future_fighter/comments/commentRss/3866068.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3866068When the Linux kernel boots the system, it must find and run the first user program, generally called "init". User programs live in filesystems, so the Linux kernel must find and mount the first (or "root") filesystem in order to boot successfully.<img src ="http://blog.csdn.net/future_fighter/aggbug/3866068.aspx" width = "1" height = "1" />Fri, 06 Feb 2009 21:57:00 +0800Davidhttp://blog.csdn.net/future_fighter/archive/2009/02/06/3866068.aspx#Feedbackhttp://blog.csdn.net/future_fighter/archive/2009/02/06/3866068.aspxDavidhttp://blog.csdn.net/future_fighter/archive/2009/02/06/3866068.aspxhttp://blog.csdn.net/future_fighter/rss.aspxcsdn.net/future_fighter/~1293389/206265556/1296217