c file locking example

Various locking mechanisms have emerged to ensure data integrity. The locking mechanism determines the concurrent processing capability and performance of a database. The locking mechanism of the database is simply a rule designed by the database to

I. What is file lock? No one will be unfamiliar with the word lock, because there are a lot of locks in our lives, and they play their role in all aspects, the lock function in the world can be summarized as one sentence, that is, to prevent some

C Programming Interface for SQlite Database (7) Database Locking)By drizzle QQ: 253786989 The content in Using SQLite is not very clear. Have time to take a closer look at SQLite documentation: http://www.sqlite.org/lockingv3.html (File Locking And

In Linux, there are two types of File Locking: one is to create a lock file through atomic operations, and the other is to allow access to this part of the content to be locked. 1. Lock files Many applications only need to be able to create a lock

IOS_33 _ playing music (playing in the background + locking screen lyrics) and ios_33 locking ScreenFinally:Application proxy (three-step background playback) /// BeyondAppDelegate. h // 33 _ audio effect /// Created by beyond on 14-9-10. //

C-based file operations In ANSI C, the operation of the file is divided into two ways, that is, streaming file operations and I/O file operations, respectively, described below. One, streaming file operation The file operations in this way have an

One, what is the file lock To lock the word, we must not unfamiliar, because we live in a large number of locks, they play its part in every way, and now the world's lock function can be summed up in a sentence, is to prevent some people to do

DB2 starting with version 8.2, customers can specify a lockout policy for each DB2 session. In previous releases, you could configure an application only through the metabase configuration parameter Locktimeout if the lock is not available, how long

The following article mainly introduces the practical operation skills of the DB2 database for locking a single session. I have seen the actual operation skills of the DB2 database for locking a single session on the relevant website, and I think it

In the programming process, file operations are a common problem. In C ++ builder, you can use multiple methods to operate files, I will introduce this in detail in the following parts: 1. C-based file operations; 2. File Operations Based on C ++;