volatile int

For more information, see http://gyy.iteye.com/blog/166678! A variable defined as volatile means that this variable may be unexpectedly changed, so that the compiler will not assume the value of this variable. Precisely, the optimizer must

Talking about high concurrency (vi) Implementation of several spin locks (i) two major spin locks are implemented in this article: Taslock and Ttaslock, and their problem is frequent CAS operations. A large amount of cache consistency traffic is

For example:volatile int i=10;int j = i;...int k = i;Volatile tells the compiler that I can change at any time, and each time it is used it must be read from the address of I, so the compiler generated executable code will re-read the data from I's

In the traffic warning and current limiting schemes, there are two common methods. The first sliding window mode is controlled by counting the number of accesses over a period of time, and a current limit is reached when the number of accesses

Preprocessor (Preprocessor)1. Declare a constant with pre-processing instruction # define to indicate how many seconds are in 1 years (ignoring leap year issues)#define SECONDS_PER_YEAR (* * 365) ULI want to see a few things here:1). Basic knowledge

Volatile affects compiler compilation results, indicating that volatile variables are readily possible to change, and volatile variables related to the operation, do not compile optimization, to avoid errors, (VC + + in the production of release

Hey. There are too many things to learn, too little time. A week of work to summarize the things too much, but also to deal with, the more accumulate. Great weekend to go out to play ah .... Get it, the crap ends here.Boring time to look at the Web

This article copyleft [email protected] all, using the GPL published, can be freely copied, reproduced. But reproduced please maintain the integrity of the document, stating the original author and the original link, strictly prohibited for any

Volatile affects compiler compilation results, indicating that volatile variables are readily possible to change, and volatile variables related to the operation, do not compile optimization, to avoid errors, (VC + + in the production of release

The following is an analysis of the volatile keyword that I searched from the Internet ......   A variable defined as volatile means that this variable may be unexpectedly changed, so that the compiler will not assume the value of this variable.

Click to read the original1. Declare a constant with pre-processing instruction # define to indicate how many seconds are in 1 years (ignoring leap year issues)#define SECONDS_PER_YEAR (* 365UL) [Changes in the original text]I want to see a few

1. Why use volatile?The volatile keyword and the const counterpart in C + +, which are used to modify variables, are often used to establish language-level memory barrier. This is a description of the volatile modifier for BS in "the C + +

Linux general technology-Linux programming and kernel information-system call hijacking in Linux 2.4.18 kernel. For details, refer to the following section. Post: System Call hijacking in Linux2.4.18 kernel note: the methods and techniques

C language testing is an essential and effective way to recruit embedded system programmers. Over the years, I have both participated in and organized many such tests. During this process, I realized that these tests could provide a lot of useful

I. Preface1. Description of Compiler optimizations:Due to the memory access speed is far less than the CPU processing speed, in order to improve the overall performance of the machine, the hardware to introduce hardware cache caches, speed up access

I. Preface1. Description of Compiler optimizations:Because memory access is far less than CPU processing speed, in order to improve the overall performance of the machine, hardware to introduce hardware cache caches, speed up the access to memory.

I. Preface1. Description of Compiler optimizations:Because memory access is far less than CPU processing speed, in order to improve the overall performance of the machine, hardware to introduce hardware cache caches, speed up the access to memory.

This summary is currently doing knowledge, I have not done too many related practical applications. 1. Overview Just like the more familiar const, volatile is a type modifier (kind specifier). It is designed to modify variables that are accessed

Embedded and C Language Volatile Volatile English words mean unstable and capricious. in C language, the volatile keyword is used to declare a variable. That is to say, this variable will undergo unexpected changes and needs to be read again every

Java thread security synchronized, asynchronous ynchronizedI. thread security issues: Principles of concurrent programming: the purpose of designing concurrent programming is to make the program more efficient, but data consistency (data accuracy)