public class VolatileFeaturesExample { volatile long vl = 0L; public void set(long l) { vl = l; } public void getAndIncrement() { vl++;// 复合(多个)volatile变量的读/写 } public long get() { return vl;// 单个volatile变量
indicates that a variable may be changed in a way which is absolutely unpredictable by analysing the normal program flow (for example, a variable which may be changed by an interrupt handler). This keyword uses the following syntax: 翻译为表示一个变量也许会被后台程序改变,关键字 volatile 是与 ...
A memory model describes, given a program and an execution trace of that program, whether the execution trace is a legal execution of the program. For theJavaprogramming language, the memory model works by examining each read in an execution trace and checking that the write observed by that ...
-- Example 2 load 操作被提前; 出现在执行期间的Reordering,称之为CPU Memory Reordering; •假设X,Y初始化为0; 根据p1和p2的运行顺序不同,按常规不乱序执行来说,r1, r2 的值可能为0,1(p1 first); 1,0;(p2 first) 1,1(concurrent); 但一定不会出现0,0;的状态,实际上测试运行多次,会出现0,0...
public class AtomicityExample { private HostInfo hostInfo; public void updateHostInfo(String ip, int port) { // 以下操作不是原子操作 hostInfo.setIp(ip);// 语句① hostInfo.setPort(port);// 语句② } public void connectToHost() { String ip = hostInfo.getIp(); int port = hostInfo.getPort...
In many cases, non-volatile memory can be upgraded or expanded. For example, in computers, you can often add more storage by installing additional hard drives or SSDs. Similarly, many devices allow for memory card expansion to increase storage capacity. ...
The following example demonstrates how an auxiliary or worker thread can be created and used to perform processing in parallel with that of the primary thread. For more information about multithreading, seeManaged Threading. C#Copy publicclassWorker{// This method is called when the thread is sta...
(as well as move within, and leave the body) it must pass across cell membranes. Cell membranes are formidable barriers and major body defenses that prevent foreign invaders or substances from gaining entry into body tissues. Normally, cells in solid tissues (for example, skin or mucous ...
c, SAFs are used to pin the magnetization of the RL. Equivalent magnetic structures are observed in layered materials (top) or can be artificially created (for example, with Co/graphene (Gr), bottom). d, Interfacial PMA is found at the interface of magnetic metals and oxides but also on...
Investigations into the compositional model of the Earth, particularly the atypical concentrations of volatile elements within the silicate portion of the early Earth, have attracted significant interest due to their pivotal role in elucidating the plane