共享内存 - 需要同步(Shared memory - need for synchronization)

 我已经看到一个项目，其中进程之间的通信是使用共享内存进行的（例如，在Windows下使用::CreateFileMapping ），并且每当其中一个进程想要通知共享内存中的某些数据时，就会通知使用命名事件的同步机制感兴趣的一方，共享内存的内容发生了变化。 
 
 我担心这样一个事实：读取新信息的进程不存在适当的内存栅栏，知道它必须使数据的副本无效并在生成器进程“发布”后从主内存中读取它。 
 
 你知道如何在Windows上使用共享内存完成这项工作吗？ 
 
 编辑只是想补充一点，创建文件映射后，进程只使用一次MapViewOfFile（）API，对共享数据的每次新修改都使用通过初始调用MapViewOfFile（）获得的指针来读取通过共享内存发送的新数据。 正确的同步是否要求每次数据在共享内存中更改时，读取数据的进程每次都必须创建MapViewOfFile（）？ 

I've seen a project where communication between processes was made using shared memory (e.g. using ::CreateFileMapping under Windows) and every time one of the processes wanted to notify that some data is available in shared memory, a synchronization mechanism using named events notified the interested party that the content of the shared memory changed.
 
I am concerned on the fact that the appropriate memory fences are not present for the process that reads the new information to know that it has to invalidate it's copy of the data and read it from main memory once it is "published" by the producer process.
 
Do you know how can this be accomplished on Windows using shared memory?
 
EDIT Just wanted to add that after creating the file mapping the processes uses MapViewOfFile() API only once and every new modification to the shared data uses the pointer obtained by the initial call to MapViewOfFile() to read the new data sent over the shared memory. Does correct synchronization require that every time data changes in shared memory the process that reads data must create MapViewOfFile() every time ?

原文：https://stackoverflow.com/questions/10175691