semaphore lock

Reprint Please specify source: http://www.cnblogs.com/skywang12345/p/3534050.htmlSemaphore IntroductionSemaphore is a count semaphore, and its essence is a "shared lock".The semaphore maintains a semaphore license set. A thread can obtain a

Java Multithreading Series--principle and example of the semaphore semaphore of "Juc lock" 11Semaphore IntroductionSemaphore is a count semaphore, and its essence is a "shared lock".The semaphore maintains a semaphore license set. A thread can

POSIX semaphores are real-time extensions that are part of the POSIX standard system interface definition. The XSI IPC defined in the SUS (Single UNIX specification) specification also defines the system interface that people commonly refer to as

Transferred from: http://blog.csdn.net/goodluckwhh/article/details/9006065Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Directory (?) [-] A signal volume The concept of

Introduction In the previous article, the Reentrantlock principle based on Aqs was analyzed in detail, and Reentrantlock represented an exclusive lock through the transformation between the state variables 0 and 1 in Aqs. So can you think about what

Semaphore is a count semaphore. Conceptually, semaphores maintain a set of licenses. If necessary, each one is blocked before the license is available acquire() , and then the license is acquired. Each release() add a license, which may release a

Semaphore is a count semaphore. Conceptually, semaphores maintain a set of licenses. If necessary, each one is blocked before the license is available acquire() , and then the license is acquired. Each release() add a license, which may release a

Transferred from: http://blog.csdn.net/xu_guo/article/details/6072823Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.A spin lock can only be held by an executable thread (except for

Mutex is a key. When a person takes the key, they can enter a room. When they come out, the key is handed over to the first in the queue. Generally, this method is used to serialize the access to the critical section code to ensure that the Code is

Introduction In the previous article, the Reentrantlock principle based on Aqs was analyzed in detail, and Reentrantlock represented an exclusive lock through the transformation between the state variables 0 and 1 in Aqs. So can you think about what