C++ FAQs Part I. Preliminaries Chapter 1. Introduction FAQ 1.01 What is the purpose of this chapter? FAQ 1.02 What are C++ FAQs? FAQ 1.03 Who is the target audience for this book ? FAQ 1.04 Is this a book about C++ per se? FAQ 1.05 Why do deve
绝对经典 物超所值，经典收藏 内容如下： General C/C++ Pre-processor commands Operator Precedence Escape Sequences ASCII Chart Data Types Keywords Standard C Library Standard C I/O Standard C String & Character Standard C Math Standard C Time & Date Standard C Me mory
C++ 常见问题问答详解。 Part I. Preliminaries Chapter 1. Introduction FAQ 1.01 What is the purpose of this chapter? FAQ 1.02 What are C++ FAQs? FAQ 1.03 Who is the target audience for this book? FAQ 1.04 Is this a book about C++ per se? FAQ 1.05 Why do develo
CAS是个啥
CAS（Compare and swap）直译过来就是比较和替换，也有人叫compare and exchange，是一种通过硬件实现并发安全的常用技术，底层通过利用CPU的CAS指令对缓存加锁或总线加锁的方式来实现多处理器之间的原子操作。仔细观察J.U.C包中类的实现代码，会发现这些类中大量使用到了CAS，所以CAS是Java并发包的实现基础。它的实现过程是，有3个操作数，内存值V，旧的预期值E，要修改的新值N，当且仅当预期值E和内存值V相同时，才将内存值V修改为N，否则什么都不
1.比较并交换Compare-And-Swap
比较当前工作内存的值和主内存的值，如果相同则只需规定操作，否则继续比较直到内存和工作内存中的值一致为止
AtomicInteger atomicInteger = new AtomicInteger(5);
atomicInteger.compareAndSet(5, 2020) + \t current data is + atomicInteger.get())
/**
* Atomically sets the value to the
