how to use semaphores

Chapter 4 semaphores, shared memory and Message Queue In this chapter, we will discuss the set of process communication tools introduced by at&t V.2, the Unix release. Because these programs appear in the relevant release version and have similar

Inter-process communication (3)-semaphores and processes communication semaphores I will use several blogs to summarize several methods of communication between processes in Linux. I will write the summary at the beginning in each blog of this

3. spin lock The most common locks in Linux kernel are spin locks. A spin lock is a mutually exclusive device. It has only two values: "locked" and "Unlocked ". If the lock is available, the lock bit is set, and the code continues to enter the

Differences between semaphores and spin locks The spin lock does not cause the caller to sleep.If the spin lock has been maintained by another execution unit, the caller will keep repeating to check whether the lock holder has released the lock.

Semaphores Code Source: Embedded Linux application development standard tutorial Semaphores Http://www.cnblogs.com/hjslovewcl/archive/2011/03/03/2314341.htmlWhen we use thread operations to write programs in a multi-user system, multi-process

Source:Inter-process communication for Linux-semaphoresInter-process communication for Linux-semaphores版权声明：本文章内容在非商业使用前提下可无需授权任意转载、发布。转载、发布请务必注明作者和其微博、公众号地址，以便读者询问问题和甄误反馈，共同进步。微博ID：orroz公众号：Linux系统技术ObjectiveSemaphores are also called semaphores,

Process Management 2 -- Process Synchronization and semaphores, process management 2 -- Address:Http://www.cnblogs.com/archimedes/p/os-process-management2.html, Reprinted, please specify the source address. Process Synchronization Process

To avoid concurrency and prevent competition. The kernel provides a set of Synchronization Methods to protect shared data. Our focus is not to introduce the detailed usage of these methods, but to emphasize the difference between these methods and

Semaphores are primitives used to provide synchronization between different threads of different processes or a given process. There are three types: POSIX-known semaphores, using POSIX IPC name identifiers, POSIX memory-based semaphores, stored in

Talk C chestnuts together (101st back: C language instance -- use semaphores for inter-process synchronization and mutex 2) Hello, everyone. In the previous session, we were talking about the use of semaphores for inter-process synchronization and