volatile int

The lock-free programming is really fascinating and hateful. The blogger has previously written several articles about lock-free programming. For example, about lockless programming and concurrent data structures: Fascinating atoms. For more

A variable that is defined as volatile means that the variable may be unexpectedly changed so that the compiler does not assume the value of the variable. Precisely, the optimizer must carefully re-read the value of the variable each time it uses

Volatile affect compiler compiler results, pointed out that volatile variable is at any time may change, and volatile variables related to the operation, do not compile optimization to avoid errors, (VC + + in the production version of the

Talk about the role of volatile 64 recommend a variable that is defined as volatile is that the variable may be unexpectedly altered so that the compiler does not assume the value of the variable. Precisely, the optimizer must carefully reread the

Hours requirementsPseudo code Extract hours Extract Time AddressTime is stored in the 16-bit register (base +2), defining a time macro to store the address.#define Time_Addr 0xFFFFC0000#define TIME *(volatile int *)

# Define delinuxmodule. h # define delinuxinit. h # define delinuxmm. h # define delinuxslab. h # define delinuxtypes. h # define delinuxsemaphore. h # define delinuxcdev. h # define delinuxfs. h # define delinuxsemaphore. h # define delinuxirq. h #

Embedded Assembly macro function _ syscall0 for system calls defined in linux/include/unistd. h. In fact, it is not difficult to find that it is a function, but it is defined by a macro. The key is how to understand the syntax of _ asm _ volatile.

Interview point: Interpreting keywordsVolatile CAnalysis of language interview questions1. What is volatile? The volatile keyword is a type modifier that uses the type variables it declares to indicate that it can be changed by unknown factors of

Volatile ConceptVolatile is variable and unstable. Like const, the volatile keyword is a type modifier. Variables modified by volatile indicate that they can be changed by unknown factors in some compilers, such as operating systems, hardware, or

In this section, we begin to discuss array atomic operations and some other atomic operations.Atomicintegerarray/atomiclongarray/atomicreferencearray 's API is similar, select a representative atomicintegerarray to describe these issues.int get (int

Java and the contract to make a general summary, if there is a mistake, please correct me.The overall structure of the JUC package is generally as followsThe outer frame is mainly lock (Reentrantlock, Readwritelock, etc.), synchronizer (semaphores,

Previous: http://www.bkjia.com/kf/201201/116702.html 18.7.1 bit domain You can declare a special type of data member, called a bit-field, to save a specific number of digits. When a program needs to pass binary data to another program or hardware

Atomic, spinlock and mutex Performance ComparisonI am very curious about the performance of different synchronization principles, so I made the following experiments to compare atomic, spinlock, and mutex:1. No Synchronization# Include # Include

At the beginning of nios2, IRQ was enhanced, but in fact the Enhanced type was only a shell, and the internal IRQ was still the original, and it was dizzy as a touch... We do not provide any subjective opinions here. Maybe we want to upgrade

1. Dispatch There is a template function below, assuming an animal shelter organization provides it and they accept all the poor animals that are homeless, so they provide a function to the outside world to accept registration. The function looks

DDR = double data rate double rate synchronous dynamic random memory. Strictly speaking, DDR should be called ddr sdram, which is often called DDR, Now let's analyze the DDR initialization. A program can be divided into code segments, data segments,

Volatile Concept Volatile is variable and unstable. Volatile keywords and constIt is also a type modifier. The variable it modifies indicates that it can be changed by some unknown factors of the compiler, such as the operating system, hardware, or

* What is the meaning of the keyword volatile and three different examples are given.A variable defined as volatile means that this variable may be unexpectedly changed, so that the compiler will notAssume the value of this variable. Precisely, the

1. What is Atomic? The word Atomic has a relationship with atoms, which were once considered to be the smallest unit of matter. Atomic in a computer means that it cannot be divided into several parts. If a piece of code is considered Atomic, it

Volatile means "easy to lose, easy to change ". The definition of this qualifier indicates to the compiler that the content of the variable may change due to modifications to other programs. When a variable is declared in a program, the compiler