进程同步,哲学家进餐共享临界区变量.定义信号量机制控制进程不互斥!...

包含两个程序，一个用于读管道，一个用于写管道．主要是练习有名管道的使用方法．-contains two procedures, a pipeline used for reading, writing for a pipeline. Main pipeline is a well-known practice of use.

安装DDD之前，需要装的-installation required before packing of

DOS文件格式转化为UNIX文件格式的C程序-DOS file format conversion for UNIX file format C Program

Linux下的tree命令，同window，功能更强大！ 1、下载tree-1.5.1.1源程序 2、解压源码到工作目录tar zxvf tree-1.5.1.1.tgz 3、在tree-1.5.1.1目录交叉编译：make CC=arm-linux-gcc 4、安装：make prefix=/home/xxxx/rootfs install Ubuntu下 直接 apt-get install tree 即可安装最新的tr-Linux under the tree order, with the window, more powerful! 1, tree-1.5.1.1 source code download 2, extract the source to the working directory tar zxvf tree-1.5.1.1.tgz3, in the tree-1.5.1.1 directory cross compiler: make CC = arm-linux-gcc4, install: make prefix =/home/xxxx/rootfs installUbuntu directly under the apt-get install tree to install the latest tr

在同一个进程地址空间内执行的两个线程。生产者线程生产物品，然后将物品放置在一个空缓冲区中供消费者线程消费。消费者线程从缓冲区中获得物品，然后释放缓冲区。当生产者线程生产物品时，如果没有空缓冲区可用，那么生产者线程必须等待消费者线程释放出一个空缓冲区。当消费者线程消费物品时，如果没有满的缓冲区，那么消费者线程将被阻塞，直到新的物品被生产出来。-In the same address space of a process implemented within the two threads. The producer thread production of goods, and then items placed in an empty buffer in the thread consumption for consumers. Consumer thread to acquire items from the buffer, and then release the buffer. When the producer thread is the production of goods, if there is no empty buffers are available, then the producer thread must wait for the Consumer thread to release an empty buffer. When a consumer thread consumer goods, if the buffer is not full, then the consumer thread will be blocked until the new items were produced.

内核定时器的使用+linux+timer-The use of the kernel timers+ linux+ timer

pxa270下利用mmap函数实现LED控制的函数，直接在用户层操作具体的IO口来控制LED，推荐！-pxa270 next LED control function implementation using mmap functions operate directly on the user level of specific IO port to control the LED, recommended!

在SCO UNIX制定界面程序 可根据文件配制菜单,而不必修改源程序,非常方便- Formulation contact surface procedure may act according to the document configuration menu in SCO the UNIX, but does not need to revise the source program, extremely facilitates

mtd最新cvs jffs文件系统分析-MTD latest cvs jffs document analysis

unix系统下top命令的源代码-top order source code