bit mask

Today, I will continue to read chapter 4 "the lower half and the work to be executed after the push". I wrote "Implementation of Soft Interrupt" the day before yesterday, but it was not saved. So I wrote it again today. Let's start from scratch. We

Statement: the content of this blog is created at http://blog.csdn.net/droidphone. please refer to it for help. Thank you!Control Interface The control interface allows the user space application (ALSA-Lib) to access and control multiple switches

Symbian OS can be understood as a bitmap-Oriented Operating System. All applications in Symbian OS can use bitmaps, especially game programs. Although the basic drawing method (such as drawline and drawellipse) can be used to draw a smaller image,

SQL trigger syntaxSyntaxCreate trigger trigger_nameON {table | view}[With encryption]{{FOR | AFTER | instead of} {[INSERT] [DELETE] [UPDATE]}[With append][Not for replication]AS[{If update (column)[{AND | OR} UPDATE (column)][... N]| IF

Determine whether the IP source is China Telecom or China Netcom, which is often used in the background program of the site. the typical practice is to query the database. The database stores the IP address range of China Netcom (or China Telecom),

How to manage multiple connections?"What should I do if I want to monitor more than one file descriptor (FD)/connection/stream at the same time ?"Use the select () or Poll () function.Note: Select () is introduced in BSD, and Poll () is the product

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Nic naming rules in Linux: eth0 and eth1. The first Ethernet Card and the second card. Lo is the loopback interface, its IP address is fixed to 127.0.0.1, And the mask is 8 bits. It represents your machine. 1. ifconfig is used to view the NIC

IP addresses are divided into common addresses and special addresses. Most of the IP addresses used in the previous article are common IP addresses. This article describes how to use the ten methods provided by the inetaddress class to determine

First, let's take a look at the solution of msdn: Stat (): Get status information on a file. parameters: Path: pointer to a string containing the path of existing file. buffer: pointer to a structure that stores results. int _stat( const char

1. Create a new accout, create orginazation, create repo2. Install git in your local PCNote:you can create SSH key to avoid username/password input for GitHub

Recently on the MCU on the Eclipse website saw Erich Styger wrote an article about through the SWD tracking interface SWO get ARM cortex-m related information, the article structure is clear, explain thoroughly, I deeply inspired, deliberately

A daemon is a process that has a long lifetime. They often start when the system boots, and only terminate when the system shuts down. Because they do not have control terminals, they are running in the background.Features of the daemon processThe

Process Scheduler 4.1 multitaskingA multitasking operating system is an operating system that can simultaneously concurrently execute multiple processes concurrently.The multitasking system is divided into two types: Preemptive multitasking:

Transferred from: http://www.cnblogs.com/li-hao/archive/2012/01/12/2321084.htmlSoft interrupts, Tasklet, and work queues are not mechanisms that persist in the Linux kernel, but are evolved from the "lower half" (bottom half) in earlier versions of

Remote Login for Linux systemsThe configuration file for the SSHD service is/etc/ssh/ssh_config//can modify this profile to implement the SSHD service you want. For example, you can change the boot port to 11587.At present, the more common terminal

SDRAM (Synchronous dynamic random Access memory, synchronous RAM) is usually called memory. The working principle of memory, control timing, and the configuration method of related controller have been a difficult point in the process of embedded

Question one:Given a positive integer n, the first bit 1 in the binary form (order from low to high) is obtained.For example, given a positive integer of 12, its low 8-bit binary representation is: 00001100From low to high order, the first 1 appears

Error_reporting () php.ini and http.conf configuration error messagesError_reportingConfigure the level of error message return.Syntax: int error_reporting (int [level]);return value: IntegerFunction type: PHP system function This function is used

Sphinx Installation There are two ways to use Sphinx on MySQL: 1. Use API call, such as PHP, Java, etc. API function or method query. The advantage is that there is no need to recompile MySQL, the server process "low coupling", and the program can